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This package contains Microsoft Azure SDK for EventGrid Management SDK. For documentation on how to use this package, please see https://aka.ms/azsdk/java/mgmt. Azure EventGrid Management Client. Package tag package-2021-10-preview.

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
// Code generated by Microsoft (R) AutoRest Code Generator.

package com.azure.resourcemanager.eventgrid.implementation;

import com.azure.core.annotation.BodyParam;
import com.azure.core.annotation.Delete;
import com.azure.core.annotation.ExpectedResponses;
import com.azure.core.annotation.Get;
import com.azure.core.annotation.HeaderParam;
import com.azure.core.annotation.Headers;
import com.azure.core.annotation.Host;
import com.azure.core.annotation.HostParam;
import com.azure.core.annotation.Patch;
import com.azure.core.annotation.PathParam;
import com.azure.core.annotation.Post;
import com.azure.core.annotation.Put;
import com.azure.core.annotation.QueryParam;
import com.azure.core.annotation.ReturnType;
import com.azure.core.annotation.ServiceInterface;
import com.azure.core.annotation.ServiceMethod;
import com.azure.core.annotation.UnexpectedResponseExceptionType;
import com.azure.core.http.rest.PagedFlux;
import com.azure.core.http.rest.PagedIterable;
import com.azure.core.http.rest.PagedResponse;
import com.azure.core.http.rest.PagedResponseBase;
import com.azure.core.http.rest.Response;
import com.azure.core.http.rest.RestProxy;
import com.azure.core.management.exception.ManagementException;
import com.azure.core.management.polling.PollResult;
import com.azure.core.util.Context;
import com.azure.core.util.FluxUtil;
import com.azure.core.util.polling.PollerFlux;
import com.azure.core.util.polling.SyncPoller;
import com.azure.resourcemanager.eventgrid.fluent.SystemTopicEventSubscriptionsClient;
import com.azure.resourcemanager.eventgrid.fluent.models.DeliveryAttributeListResultInner;
import com.azure.resourcemanager.eventgrid.fluent.models.EventSubscriptionFullUrlInner;
import com.azure.resourcemanager.eventgrid.fluent.models.EventSubscriptionInner;
import com.azure.resourcemanager.eventgrid.models.EventSubscriptionsListResult;
import com.azure.resourcemanager.eventgrid.models.EventSubscriptionUpdateParameters;
import java.nio.ByteBuffer;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

/**
 * An instance of this class provides access to all the operations defined in SystemTopicEventSubscriptionsClient.
 */
public final class SystemTopicEventSubscriptionsClientImpl implements SystemTopicEventSubscriptionsClient {
    /**
     * The proxy service used to perform REST calls.
     */
    private final SystemTopicEventSubscriptionsService service;

    /**
     * The service client containing this operation class.
     */
    private final EventGridManagementClientImpl client;

    /**
     * Initializes an instance of SystemTopicEventSubscriptionsClientImpl.
     * 
     * @param client the instance of the service client containing this operation class.
     */
    SystemTopicEventSubscriptionsClientImpl(EventGridManagementClientImpl client) {
        this.service = RestProxy.create(SystemTopicEventSubscriptionsService.class, client.getHttpPipeline(),
            client.getSerializerAdapter());
        this.client = client;
    }

    /**
     * The interface defining all the services for EventGridManagementClientSystemTopicEventSubscriptions to be used by
     * the proxy service to perform REST calls.
     */
    @Host("{$host}")
    @ServiceInterface(name = "EventGridManagementC")
    public interface SystemTopicEventSubscriptionsService {
        @Headers({ "Content-Type: application/json" })
        @Post("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}/getDeliveryAttributes")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> getDeliveryAttributes(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion, @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Content-Type: application/json" })
        @Get("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> get(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion, @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Content-Type: application/json" })
        @Put("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}")
        @ExpectedResponses({ 201 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono>> createOrUpdate(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion,
            @BodyParam("application/json") EventSubscriptionInner eventSubscriptionInfo,
            @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Accept: application/json;q=0.9", "Content-Type: application/json" })
        @Delete("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}")
        @ExpectedResponses({ 200, 202, 204 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono>> delete(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion, Context context);

        @Headers({ "Content-Type: application/json" })
        @Patch("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}")
        @ExpectedResponses({ 201 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono>> update(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion,
            @BodyParam("application/json") EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters,
            @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Content-Type: application/json" })
        @Post("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions/{eventSubscriptionName}/getFullUrl")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> getFullUrl(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName,
            @PathParam("eventSubscriptionName") String eventSubscriptionName,
            @QueryParam("api-version") String apiVersion, @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Content-Type: application/json" })
        @Get("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}/eventSubscriptions")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> listBySystemTopic(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName, @QueryParam("api-version") String apiVersion,
            @QueryParam("$filter") String filter, @QueryParam("$top") Integer top, @HeaderParam("Accept") String accept,
            Context context);

        @Headers({ "Content-Type: application/json" })
        @Get("{nextLink}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> listBySystemTopicNext(
            @PathParam(value = "nextLink", encoded = true) String nextLink, @HostParam("$host") String endpoint,
            @HeaderParam("Accept") String accept, Context context);
    }

    /**
     * Get delivery attributes for an event subscription.
     * 
     * Get all delivery attributes for an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return all delivery attributes for an event subscription along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getDeliveryAttributesWithResponseAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.getDeliveryAttributes(this.client.getEndpoint(),
                this.client.getSubscriptionId(), resourceGroupName, systemTopicName, eventSubscriptionName,
                this.client.getApiVersion(), accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Get delivery attributes for an event subscription.
     * 
     * Get all delivery attributes for an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return all delivery attributes for an event subscription along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getDeliveryAttributesWithResponseAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.getDeliveryAttributes(this.client.getEndpoint(), this.client.getSubscriptionId(),
            resourceGroupName, systemTopicName, eventSubscriptionName, this.client.getApiVersion(), accept, context);
    }

    /**
     * Get delivery attributes for an event subscription.
     * 
     * Get all delivery attributes for an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return all delivery attributes for an event subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono getDeliveryAttributesAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName) {
        return getDeliveryAttributesWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName)
            .flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Get delivery attributes for an event subscription.
     * 
     * Get all delivery attributes for an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return all delivery attributes for an event subscription along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response getDeliveryAttributesWithResponse(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, Context context) {
        return getDeliveryAttributesWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
            context).block();
    }

    /**
     * Get delivery attributes for an event subscription.
     * 
     * Get all delivery attributes for an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return all delivery attributes for an event subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public DeliveryAttributeListResultInner getDeliveryAttributes(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        return getDeliveryAttributesWithResponse(resourceGroupName, systemTopicName, eventSubscriptionName,
            Context.NONE).getValue();
    }

    /**
     * Get an event subscription of a system topic.
     * 
     * Get an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be found.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return an event subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(
                context -> service.get(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
                    systemTopicName, eventSubscriptionName, this.client.getApiVersion(), accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Get an event subscription of a system topic.
     * 
     * Get an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be found.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return an event subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.get(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, eventSubscriptionName, this.client.getApiVersion(), accept, context);
    }

    /**
     * Get an event subscription of a system topic.
     * 
     * Get an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be found.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return an event subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono getAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        return getWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName)
            .flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Get an event subscription of a system topic.
     * 
     * Get an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be found.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return an event subscription along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response getWithResponse(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, Context context) {
        return getWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context).block();
    }

    /**
     * Get an event subscription of a system topic.
     * 
     * Get an event subscription.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be found.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return an event subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionInner get(String resourceGroupName, String systemTopicName, String eventSubscriptionName) {
        return getWithResponse(resourceGroupName, systemTopicName, eventSubscriptionName, Context.NONE).getValue();
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> createOrUpdateWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        if (eventSubscriptionInfo == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionInfo is required and cannot be null."));
        } else {
            eventSubscriptionInfo.validate();
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.createOrUpdate(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, eventSubscriptionName, this.client.getApiVersion(),
                eventSubscriptionInfo, accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> createOrUpdateWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo,
        Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        if (eventSubscriptionInfo == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionInfo is required and cannot be null."));
        } else {
            eventSubscriptionInfo.validate();
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.createOrUpdate(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, eventSubscriptionName, this.client.getApiVersion(), eventSubscriptionInfo, accept,
            context);
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, EventSubscriptionInner> beginCreateOrUpdateAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionInner eventSubscriptionInfo) {
        Mono>> mono = createOrUpdateWithResponseAsync(resourceGroupName, systemTopicName,
            eventSubscriptionName, eventSubscriptionInfo);
        return this.client.getLroResult(mono,
            this.client.getHttpPipeline(), EventSubscriptionInner.class, EventSubscriptionInner.class,
            this.client.getContext());
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, EventSubscriptionInner> beginCreateOrUpdateAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionInner eventSubscriptionInfo, Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono = createOrUpdateWithResponseAsync(resourceGroupName, systemTopicName,
            eventSubscriptionName, eventSubscriptionInfo, context);
        return this.client.getLroResult(mono,
            this.client.getHttpPipeline(), EventSubscriptionInner.class, EventSubscriptionInner.class, context);
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, EventSubscriptionInner> beginCreateOrUpdate(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionInner eventSubscriptionInfo) {
        return this
            .beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionInfo)
            .getSyncPoller();
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, EventSubscriptionInner> beginCreateOrUpdate(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionInner eventSubscriptionInfo, Context context) {
        return this
            .beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionInfo,
                context)
            .getSyncPoller();
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono createOrUpdateAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo) {
        return beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
            eventSubscriptionInfo).last().flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono createOrUpdateAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo, Context context) {
        return beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
            eventSubscriptionInfo, context).last().flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionInner createOrUpdate(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo) {
        return createOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionInfo)
            .block();
    }

    /**
     * Create or update an event subscription for a system topic.
     * 
     * Asynchronously creates or updates an event subscription with the specified parameters. Existing event
     * subscriptions will be updated with this API.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be created. Event subscription names must be
     * between 3 and 64 characters in length and use alphanumeric letters only.
     * @param eventSubscriptionInfo Event subscription properties containing the destination and filter information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionInner createOrUpdate(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionInner eventSubscriptionInfo, Context context) {
        return createOrUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionInfo,
            context).block();
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> deleteWithResponseAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        return FluxUtil
            .withContext(context -> service.delete(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, eventSubscriptionName, this.client.getApiVersion(), context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> deleteWithResponseAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        context = this.client.mergeContext(context);
        return service.delete(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, eventSubscriptionName, this.client.getApiVersion(), context);
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, Void> beginDeleteAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        Mono>> mono
            = deleteWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(), Void.class, Void.class,
            this.client.getContext());
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, Void> beginDeleteAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono
            = deleteWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(), Void.class, Void.class,
            context);
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, Void> beginDelete(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        return this.beginDeleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName).getSyncPoller();
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, Void> beginDelete(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, Context context) {
        return this.beginDeleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context)
            .getSyncPoller();
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return A {@link Mono} that completes when a successful response is received.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono deleteAsync(String resourceGroupName, String systemTopicName, String eventSubscriptionName) {
        return beginDeleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return A {@link Mono} that completes when a successful response is received.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono deleteAsync(String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        Context context) {
        return beginDeleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public void delete(String resourceGroupName, String systemTopicName, String eventSubscriptionName) {
        deleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName).block();
    }

    /**
     * Delete an event subscription of a system topic.
     * 
     * Delete an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be deleted.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public void delete(String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        Context context) {
        deleteAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context).block();
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> updateWithResponseAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        if (eventSubscriptionUpdateParameters == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter eventSubscriptionUpdateParameters is required and cannot be null."));
        } else {
            eventSubscriptionUpdateParameters.validate();
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.update(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, eventSubscriptionName, this.client.getApiVersion(),
                eventSubscriptionUpdateParameters, accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> updateWithResponseAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters,
        Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        if (eventSubscriptionUpdateParameters == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter eventSubscriptionUpdateParameters is required and cannot be null."));
        } else {
            eventSubscriptionUpdateParameters.validate();
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.update(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, eventSubscriptionName, this.client.getApiVersion(), eventSubscriptionUpdateParameters,
            accept, context);
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, EventSubscriptionInner> beginUpdateAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters) {
        Mono>> mono = updateWithResponseAsync(resourceGroupName, systemTopicName,
            eventSubscriptionName, eventSubscriptionUpdateParameters);
        return this.client.getLroResult(mono,
            this.client.getHttpPipeline(), EventSubscriptionInner.class, EventSubscriptionInner.class,
            this.client.getContext());
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link PollerFlux} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, EventSubscriptionInner> beginUpdateAsync(
        String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters, Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono = updateWithResponseAsync(resourceGroupName, systemTopicName,
            eventSubscriptionName, eventSubscriptionUpdateParameters, context);
        return this.client.getLroResult(mono,
            this.client.getHttpPipeline(), EventSubscriptionInner.class, EventSubscriptionInner.class, context);
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, EventSubscriptionInner> beginUpdate(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters) {
        return this
            .beginUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
                eventSubscriptionUpdateParameters)
            .getSyncPoller();
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the {@link SyncPoller} for polling of event Subscription.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, EventSubscriptionInner> beginUpdate(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters, Context context) {
        return this
            .beginUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
                eventSubscriptionUpdateParameters, context)
            .getSyncPoller();
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono updateAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters) {
        return beginUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
            eventSubscriptionUpdateParameters).last().flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono updateAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName, EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters,
        Context context) {
        return beginUpdateAsync(resourceGroupName, systemTopicName, eventSubscriptionName,
            eventSubscriptionUpdateParameters, context).last().flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionInner update(String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters) {
        return updateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionUpdateParameters)
            .block();
    }

    /**
     * Update event subscription of a system topic.
     * 
     * Update an existing event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription to be updated.
     * @param eventSubscriptionUpdateParameters Updated event subscription information.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return event Subscription.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionInner update(String resourceGroupName, String systemTopicName, String eventSubscriptionName,
        EventSubscriptionUpdateParameters eventSubscriptionUpdateParameters, Context context) {
        return updateAsync(resourceGroupName, systemTopicName, eventSubscriptionName, eventSubscriptionUpdateParameters,
            context).block();
    }

    /**
     * Get full URL of an event subscription of a system topic.
     * 
     * Get the full endpoint URL for an event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the full endpoint URL for an event subscription of a system topic along with {@link Response} on
     * successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getFullUrlWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.getFullUrl(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, eventSubscriptionName, this.client.getApiVersion(), accept,
                context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Get full URL of an event subscription of a system topic.
     * 
     * Get the full endpoint URL for an event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the full endpoint URL for an event subscription of a system topic along with {@link Response} on
     * successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getFullUrlWithResponseAsync(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        if (eventSubscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter eventSubscriptionName is required and cannot be null."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.getFullUrl(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, eventSubscriptionName, this.client.getApiVersion(), accept, context);
    }

    /**
     * Get full URL of an event subscription of a system topic.
     * 
     * Get the full endpoint URL for an event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the full endpoint URL for an event subscription of a system topic on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono getFullUrlAsync(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        return getFullUrlWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName)
            .flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Get full URL of an event subscription of a system topic.
     * 
     * Get the full endpoint URL for an event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the full endpoint URL for an event subscription of a system topic along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response getFullUrlWithResponse(String resourceGroupName,
        String systemTopicName, String eventSubscriptionName, Context context) {
        return getFullUrlWithResponseAsync(resourceGroupName, systemTopicName, eventSubscriptionName, context).block();
    }

    /**
     * Get full URL of an event subscription of a system topic.
     * 
     * Get the full endpoint URL for an event subscription of a system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param eventSubscriptionName Name of the event subscription.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return the full endpoint URL for an event subscription of a system topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public EventSubscriptionFullUrlInner getFullUrl(String resourceGroupName, String systemTopicName,
        String eventSubscriptionName) {
        return getFullUrlWithResponse(resourceGroupName, systemTopicName, eventSubscriptionName, Context.NONE)
            .getValue();
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param filter The query used to filter the search results using OData syntax. Filtering is permitted on the
     * 'name' property only and with limited number of OData operations. These operations are: the 'contains' function
     * as well as the following logical operations: not, and, or, eq (for equal), and ne (for not equal). No arithmetic
     * operations are supported. The following is a valid filter example: $filter=contains(namE, 'PATTERN') and name ne
     * 'PATTERN-1'. The following is not a valid filter example: $filter=location eq 'westus'.
     * @param top The number of results to return per page for the list operation. Valid range for top parameter is 1 to
     * 100. If not specified, the default number of results to be returned is 20 items per page.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation along with {@link PagedResponse} on successful completion
     * of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySystemTopicSinglePageAsync(String resourceGroupName,
        String systemTopicName, String filter, Integer top) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(
                context -> service.listBySystemTopic(this.client.getEndpoint(), this.client.getSubscriptionId(),
                    resourceGroupName, systemTopicName, this.client.getApiVersion(), filter, top, accept, context))
            .>map(res -> new PagedResponseBase<>(res.getRequest(),
                res.getStatusCode(), res.getHeaders(), res.getValue().value(), res.getValue().nextLink(), null))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param filter The query used to filter the search results using OData syntax. Filtering is permitted on the
     * 'name' property only and with limited number of OData operations. These operations are: the 'contains' function
     * as well as the following logical operations: not, and, or, eq (for equal), and ne (for not equal). No arithmetic
     * operations are supported. The following is a valid filter example: $filter=contains(namE, 'PATTERN') and name ne
     * 'PATTERN-1'. The following is not a valid filter example: $filter=location eq 'westus'.
     * @param top The number of results to return per page for the list operation. Valid range for top parameter is 1 to
     * 100. If not specified, the default number of results to be returned is 20 items per page.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation along with {@link PagedResponse} on successful completion
     * of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySystemTopicSinglePageAsync(String resourceGroupName,
        String systemTopicName, String filter, Integer top, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (this.client.getSubscriptionId() == null) {
            return Mono.error(new IllegalArgumentException(
                "Parameter this.client.getSubscriptionId() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (systemTopicName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicName is required and cannot be null."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service
            .listBySystemTopic(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
                systemTopicName, this.client.getApiVersion(), filter, top, accept, context)
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                res.getValue().value(), res.getValue().nextLink(), null));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param filter The query used to filter the search results using OData syntax. Filtering is permitted on the
     * 'name' property only and with limited number of OData operations. These operations are: the 'contains' function
     * as well as the following logical operations: not, and, or, eq (for equal), and ne (for not equal). No arithmetic
     * operations are supported. The following is a valid filter example: $filter=contains(namE, 'PATTERN') and name ne
     * 'PATTERN-1'. The following is not a valid filter example: $filter=location eq 'westus'.
     * @param top The number of results to return per page for the list operation. Valid range for top parameter is 1 to
     * 100. If not specified, the default number of results to be returned is 20 items per page.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listBySystemTopicAsync(String resourceGroupName, String systemTopicName,
        String filter, Integer top) {
        return new PagedFlux<>(() -> listBySystemTopicSinglePageAsync(resourceGroupName, systemTopicName, filter, top),
            nextLink -> listBySystemTopicNextSinglePageAsync(nextLink));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listBySystemTopicAsync(String resourceGroupName, String systemTopicName) {
        final String filter = null;
        final Integer top = null;
        return new PagedFlux<>(() -> listBySystemTopicSinglePageAsync(resourceGroupName, systemTopicName, filter, top),
            nextLink -> listBySystemTopicNextSinglePageAsync(nextLink));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param filter The query used to filter the search results using OData syntax. Filtering is permitted on the
     * 'name' property only and with limited number of OData operations. These operations are: the 'contains' function
     * as well as the following logical operations: not, and, or, eq (for equal), and ne (for not equal). No arithmetic
     * operations are supported. The following is a valid filter example: $filter=contains(namE, 'PATTERN') and name ne
     * 'PATTERN-1'. The following is not a valid filter example: $filter=location eq 'westus'.
     * @param top The number of results to return per page for the list operation. Valid range for top parameter is 1 to
     * 100. If not specified, the default number of results to be returned is 20 items per page.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listBySystemTopicAsync(String resourceGroupName, String systemTopicName,
        String filter, Integer top, Context context) {
        return new PagedFlux<>(
            () -> listBySystemTopicSinglePageAsync(resourceGroupName, systemTopicName, filter, top, context),
            nextLink -> listBySystemTopicNextSinglePageAsync(nextLink, context));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listBySystemTopic(String resourceGroupName, String systemTopicName) {
        final String filter = null;
        final Integer top = null;
        return new PagedIterable<>(listBySystemTopicAsync(resourceGroupName, systemTopicName, filter, top));
    }

    /**
     * List event subscriptions of a system topic.
     * 
     * List event subscriptions that belong to a specific system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param filter The query used to filter the search results using OData syntax. Filtering is permitted on the
     * 'name' property only and with limited number of OData operations. These operations are: the 'contains' function
     * as well as the following logical operations: not, and, or, eq (for equal), and ne (for not equal). No arithmetic
     * operations are supported. The following is a valid filter example: $filter=contains(namE, 'PATTERN') and name ne
     * 'PATTERN-1'. The following is not a valid filter example: $filter=location eq 'westus'.
     * @param top The number of results to return per page for the list operation. Valid range for top parameter is 1 to
     * 100. If not specified, the default number of results to be returned is 20 items per page.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listBySystemTopic(String resourceGroupName, String systemTopicName,
        String filter, Integer top, Context context) {
        return new PagedIterable<>(listBySystemTopicAsync(resourceGroupName, systemTopicName, filter, top, context));
    }

    /**
     * Get the next page of items.
     * 
     * @param nextLink The URL to get the next list of items
     * 
     * The nextLink parameter.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation along with {@link PagedResponse} on successful completion
     * of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySystemTopicNextSinglePageAsync(String nextLink) {
        if (nextLink == null) {
            return Mono.error(new IllegalArgumentException("Parameter nextLink is required and cannot be null."));
        }
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.listBySystemTopicNext(nextLink, this.client.getEndpoint(), accept, context))
            .>map(res -> new PagedResponseBase<>(res.getRequest(),
                res.getStatusCode(), res.getHeaders(), res.getValue().value(), res.getValue().nextLink(), null))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Get the next page of items.
     * 
     * @param nextLink The URL to get the next list of items
     * 
     * The nextLink parameter.
     * @param context The context to associate with this operation.
     * @throws IllegalArgumentException thrown if parameters fail the validation.
     * @throws ManagementException thrown if the request is rejected by server.
     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
     * @return result of the List EventSubscriptions operation along with {@link PagedResponse} on successful completion
     * of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySystemTopicNextSinglePageAsync(String nextLink,
        Context context) {
        if (nextLink == null) {
            return Mono.error(new IllegalArgumentException("Parameter nextLink is required and cannot be null."));
        }
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.listBySystemTopicNext(nextLink, this.client.getEndpoint(), accept, context)
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                res.getValue().value(), res.getValue().nextLink(), null));
    }
}




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