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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.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.SystemTopicsClient;
import com.azure.resourcemanager.eventgrid.fluent.models.SystemTopicInner;
import com.azure.resourcemanager.eventgrid.models.SystemTopicsListResult;
import com.azure.resourcemanager.eventgrid.models.SystemTopicUpdateParameters;
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 SystemTopicsClient.
 */
public final class SystemTopicsClientImpl implements SystemTopicsClient {
    /**
     * The proxy service used to perform REST calls.
     */
    private final SystemTopicsService service;

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

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

    /**
     * The interface defining all the services for EventGridManagementClientSystemTopics to be used by the proxy service
     * to perform REST calls.
     */
    @Host("{$host}")
    @ServiceInterface(name = "EventGridManagementC")
    public interface SystemTopicsService {
        @Headers({ "Content-Type: application/json" })
        @Get("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> getByResourceGroup(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName, @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}")
        @ExpectedResponses({ 200, 201 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono>> createOrUpdate(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName, @QueryParam("api-version") String apiVersion,
            @BodyParam("application/json") SystemTopicInner systemTopicInfo, @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}")
        @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, @QueryParam("api-version") String apiVersion,
            Context context);

        @Headers({ "Content-Type: application/json" })
        @Patch("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/systemTopics/{systemTopicName}")
        @ExpectedResponses({ 200, 201 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono>> update(@HostParam("$host") String endpoint,
            @PathParam("subscriptionId") String subscriptionId,
            @PathParam("resourceGroupName") String resourceGroupName,
            @PathParam("systemTopicName") String systemTopicName, @QueryParam("api-version") String apiVersion,
            @BodyParam("application/json") SystemTopicUpdateParameters systemTopicUpdateParameters,
            @HeaderParam("Accept") String accept, Context context);

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

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

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

    /**
     * Get a system topic.
     * 
     * Get properties of a 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 properties of a system topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getByResourceGroupWithResponseAsync(String resourceGroupName,
        String systemTopicName) {
        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.getByResourceGroup(this.client.getEndpoint(), this.client.getSubscriptionId(),
                    resourceGroupName, systemTopicName, this.client.getApiVersion(), accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Get a system topic.
     * 
     * Get properties 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 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 properties of a system topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getByResourceGroupWithResponseAsync(String resourceGroupName,
        String systemTopicName, 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.getByResourceGroup(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, this.client.getApiVersion(), accept, context);
    }

    /**
     * Get a system topic.
     * 
     * Get properties of a 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 properties of a system topic on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono getByResourceGroupAsync(String resourceGroupName, String systemTopicName) {
        return getByResourceGroupWithResponseAsync(resourceGroupName, systemTopicName)
            .flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Get a system topic.
     * 
     * Get properties 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 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 properties of a system topic along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response getByResourceGroupWithResponse(String resourceGroupName, String systemTopicName,
        Context context) {
        return getByResourceGroupWithResponseAsync(resourceGroupName, systemTopicName, context).block();
    }

    /**
     * Get a system topic.
     * 
     * Get properties of a 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 properties of a system topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SystemTopicInner getByResourceGroup(String resourceGroupName, String systemTopicName) {
        return getByResourceGroupWithResponse(resourceGroupName, systemTopicName, Context.NONE).getValue();
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> createOrUpdateWithResponseAsync(String resourceGroupName,
        String systemTopicName, SystemTopicInner systemTopicInfo) {
        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 (systemTopicInfo == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicInfo is required and cannot be null."));
        } else {
            systemTopicInfo.validate();
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.createOrUpdate(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, this.client.getApiVersion(), systemTopicInfo, accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> createOrUpdateWithResponseAsync(String resourceGroupName,
        String systemTopicName, SystemTopicInner systemTopicInfo, 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 (systemTopicInfo == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter systemTopicInfo is required and cannot be null."));
        } else {
            systemTopicInfo.validate();
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.createOrUpdate(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, this.client.getApiVersion(), systemTopicInfo, accept, context);
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, SystemTopicInner>
        beginCreateOrUpdateAsync(String resourceGroupName, String systemTopicName, SystemTopicInner systemTopicInfo) {
        Mono>> mono
            = createOrUpdateWithResponseAsync(resourceGroupName, systemTopicName, systemTopicInfo);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(),
            SystemTopicInner.class, SystemTopicInner.class, this.client.getContext());
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, SystemTopicInner> beginCreateOrUpdateAsync(
        String resourceGroupName, String systemTopicName, SystemTopicInner systemTopicInfo, Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono
            = createOrUpdateWithResponseAsync(resourceGroupName, systemTopicName, systemTopicInfo, context);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(),
            SystemTopicInner.class, SystemTopicInner.class, context);
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, SystemTopicInner> beginCreateOrUpdate(String resourceGroupName,
        String systemTopicName, SystemTopicInner systemTopicInfo) {
        return this.beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo).getSyncPoller();
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, SystemTopicInner> beginCreateOrUpdate(String resourceGroupName,
        String systemTopicName, SystemTopicInner systemTopicInfo, Context context) {
        return this.beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo, context)
            .getSyncPoller();
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono createOrUpdateAsync(String resourceGroupName, String systemTopicName,
        SystemTopicInner systemTopicInfo) {
        return beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono createOrUpdateAsync(String resourceGroupName, String systemTopicName,
        SystemTopicInner systemTopicInfo, Context context) {
        return beginCreateOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo, context).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SystemTopicInner createOrUpdate(String resourceGroupName, String systemTopicName,
        SystemTopicInner systemTopicInfo) {
        return createOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo).block();
    }

    /**
     * Create a system topic.
     * 
     * Asynchronously creates a new system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicInfo System Topic 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SystemTopicInner createOrUpdate(String resourceGroupName, String systemTopicName,
        SystemTopicInner systemTopicInfo, Context context) {
        return createOrUpdateAsync(resourceGroupName, systemTopicName, systemTopicInfo, context).block();
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing 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 the {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> deleteWithResponseAsync(String resourceGroupName, String systemTopicName) {
        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."));
        }
        return FluxUtil
            .withContext(context -> service.delete(this.client.getEndpoint(), this.client.getSubscriptionId(),
                resourceGroupName, systemTopicName, this.client.getApiVersion(), context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @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,
        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."));
        }
        context = this.client.mergeContext(context);
        return service.delete(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, this.client.getApiVersion(), context);
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing 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 the {@link PollerFlux} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, Void> beginDeleteAsync(String resourceGroupName, String systemTopicName) {
        Mono>> mono = deleteWithResponseAsync(resourceGroupName, systemTopicName);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(), Void.class, Void.class,
            this.client.getContext());
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @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,
        Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono = deleteWithResponseAsync(resourceGroupName, systemTopicName, context);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(), Void.class, Void.class,
            context);
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing 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 the {@link SyncPoller} for polling of long-running operation.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, Void> beginDelete(String resourceGroupName, String systemTopicName) {
        return this.beginDeleteAsync(resourceGroupName, systemTopicName).getSyncPoller();
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @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,
        Context context) {
        return this.beginDeleteAsync(resourceGroupName, systemTopicName, context).getSyncPoller();
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing 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 A {@link Mono} that completes when a successful response is received.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono deleteAsync(String resourceGroupName, String systemTopicName) {
        return beginDeleteAsync(resourceGroupName, systemTopicName).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @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, Context context) {
        return beginDeleteAsync(resourceGroupName, systemTopicName, context).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing 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.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public void delete(String resourceGroupName, String systemTopicName) {
        deleteAsync(resourceGroupName, systemTopicName).block();
    }

    /**
     * Delete a system topic.
     * 
     * Delete existing system topic.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @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, Context context) {
        deleteAsync(resourceGroupName, systemTopicName, context).block();
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> updateWithResponseAsync(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters) {
        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 (systemTopicUpdateParameters == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter systemTopicUpdateParameters is required and cannot be null."));
        } else {
            systemTopicUpdateParameters.validate();
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(
                context -> service.update(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
                    systemTopicName, this.client.getApiVersion(), systemTopicUpdateParameters, accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic along with {@link Response} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono>> updateWithResponseAsync(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters, 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 (systemTopicUpdateParameters == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter systemTopicUpdateParameters is required and cannot be null."));
        } else {
            systemTopicUpdateParameters.validate();
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.update(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
            systemTopicName, this.client.getApiVersion(), systemTopicUpdateParameters, accept, context);
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, SystemTopicInner> beginUpdateAsync(String resourceGroupName,
        String systemTopicName, SystemTopicUpdateParameters systemTopicUpdateParameters) {
        Mono>> mono
            = updateWithResponseAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(),
            SystemTopicInner.class, SystemTopicInner.class, this.client.getContext());
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    private PollerFlux, SystemTopicInner> beginUpdateAsync(String resourceGroupName,
        String systemTopicName, SystemTopicUpdateParameters systemTopicUpdateParameters, Context context) {
        context = this.client.mergeContext(context);
        Mono>> mono
            = updateWithResponseAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters, context);
        return this.client.getLroResult(mono, this.client.getHttpPipeline(),
            SystemTopicInner.class, SystemTopicInner.class, context);
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, SystemTopicInner> beginUpdate(String resourceGroupName,
        String systemTopicName, SystemTopicUpdateParameters systemTopicUpdateParameters) {
        return this.beginUpdateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters).getSyncPoller();
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.LONG_RUNNING_OPERATION)
    public SyncPoller, SystemTopicInner> beginUpdate(String resourceGroupName,
        String systemTopicName, SystemTopicUpdateParameters systemTopicUpdateParameters, Context context) {
        return this.beginUpdateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters, context)
            .getSyncPoller();
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono updateAsync(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters) {
        return beginUpdateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono updateAsync(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters, Context context) {
        return beginUpdateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters, context).last()
            .flatMap(this.client::getLroFinalResultOrError);
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SystemTopicInner update(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters) {
        return updateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters).block();
    }

    /**
     * Update a system topic.
     * 
     * Asynchronously updates a system topic with the specified parameters.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @param systemTopicName Name of the system topic.
     * @param systemTopicUpdateParameters SystemTopic update 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 eventGrid System Topic.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SystemTopicInner update(String resourceGroupName, String systemTopicName,
        SystemTopicUpdateParameters systemTopicUpdateParameters, Context context) {
        return updateAsync(resourceGroupName, systemTopicName, systemTopicUpdateParameters, context).block();
    }

    /**
     * List system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listSinglePageAsync(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."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.list(this.client.getEndpoint(), this.client.getSubscriptionId(),
                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 system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listSinglePageAsync(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."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service
            .list(this.client.getEndpoint(), this.client.getSubscriptionId(), 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 system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listAsync(String filter, Integer top) {
        return new PagedFlux<>(() -> listSinglePageAsync(filter, top),
            nextLink -> listBySubscriptionNextSinglePageAsync(nextLink));
    }

    /**
     * List system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listAsync() {
        final String filter = null;
        final Integer top = null;
        return new PagedFlux<>(() -> listSinglePageAsync(filter, top),
            nextLink -> listBySubscriptionNextSinglePageAsync(nextLink));
    }

    /**
     * List system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listAsync(String filter, Integer top, Context context) {
        return new PagedFlux<>(() -> listSinglePageAsync(filter, top, context),
            nextLink -> listBySubscriptionNextSinglePageAsync(nextLink, context));
    }

    /**
     * List system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable list() {
        final String filter = null;
        final Integer top = null;
        return new PagedIterable<>(listAsync(filter, top));
    }

    /**
     * List system topics under an Azure subscription.
     * 
     * List all the system topics under an Azure subscription.
     * 
     * @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 System topics operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable list(String filter, Integer top, Context context) {
        return new PagedIterable<>(listAsync(filter, top, context));
    }

    /**
     * List system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByResourceGroupSinglePageAsync(String resourceGroupName,
        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."));
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(
                context -> service.listByResourceGroup(this.client.getEndpoint(), this.client.getSubscriptionId(),
                    resourceGroupName, 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 system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByResourceGroupSinglePageAsync(String resourceGroupName,
        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."));
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service
            .listByResourceGroup(this.client.getEndpoint(), this.client.getSubscriptionId(), resourceGroupName,
                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 system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @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 System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listByResourceGroupAsync(String resourceGroupName, String filter, Integer top) {
        return new PagedFlux<>(() -> listByResourceGroupSinglePageAsync(resourceGroupName, filter, top),
            nextLink -> listByResourceGroupNextSinglePageAsync(nextLink));
    }

    /**
     * List system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's 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 result of the List System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listByResourceGroupAsync(String resourceGroupName) {
        final String filter = null;
        final Integer top = null;
        return new PagedFlux<>(() -> listByResourceGroupSinglePageAsync(resourceGroupName, filter, top),
            nextLink -> listByResourceGroupNextSinglePageAsync(nextLink));
    }

    /**
     * List system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @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 System topics operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listByResourceGroupAsync(String resourceGroupName, String filter, Integer top,
        Context context) {
        return new PagedFlux<>(() -> listByResourceGroupSinglePageAsync(resourceGroupName, filter, top, context),
            nextLink -> listByResourceGroupNextSinglePageAsync(nextLink, context));
    }

    /**
     * List system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's 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 result of the List System topics operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listByResourceGroup(String resourceGroupName) {
        final String filter = null;
        final Integer top = null;
        return new PagedIterable<>(listByResourceGroupAsync(resourceGroupName, filter, top));
    }

    /**
     * List system topics under a resource group.
     * 
     * List all the system topics under a resource group.
     * 
     * @param resourceGroupName The name of the resource group within the user's subscription.
     * @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 System topics operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listByResourceGroup(String resourceGroupName, String filter, Integer top,
        Context context) {
        return new PagedIterable<>(listByResourceGroupAsync(resourceGroupName, 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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySubscriptionNextSinglePageAsync(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.listBySubscriptionNext(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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listBySubscriptionNextSinglePageAsync(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.listBySubscriptionNext(nextLink, this.client.getEndpoint(), accept, context)
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                res.getValue().value(), res.getValue().nextLink(), null));
    }

    /**
     * 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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByResourceGroupNextSinglePageAsync(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.listByResourceGroupNext(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 System topics operation along with {@link PagedResponse} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByResourceGroupNextSinglePageAsync(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.listByResourceGroupNext(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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