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This package contains Microsoft Azure ServiceBus Management SDK. For documentation on how to use this package, please see https://aka.ms/azsdk/java/mgmt
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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.servicebus.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.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.util.Context;
import com.azure.core.util.FluxUtil;
import com.azure.resourcemanager.servicebus.fluent.SubscriptionsClient;
import com.azure.resourcemanager.servicebus.fluent.models.SBSubscriptionInner;
import com.azure.resourcemanager.servicebus.models.SBSubscriptionListResult;
import reactor.core.publisher.Mono;

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

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

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

    /**
     * The interface defining all the services for ServiceBusManagementClientSubscriptions to be used by the proxy
     * service to perform REST calls.
     */
    @Host("{$host}")
    @ServiceInterface(name = "ServiceBusManagement")
    public interface SubscriptionsService {
        @Headers({ "Content-Type: application/json" })
        @Get("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ServiceBus/namespaces/{namespaceName}/topics/{topicName}/subscriptions")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> listByTopic(@HostParam("$host") String endpoint,
            @PathParam("resourceGroupName") String resourceGroupName, @PathParam("namespaceName") String namespaceName,
            @PathParam("topicName") String topicName, @QueryParam("api-version") String apiVersion,
            @PathParam("subscriptionId") String subscriptionId, @QueryParam("$skip") Integer skip,
            @QueryParam("$top") Integer top, @HeaderParam("Accept") String accept, Context context);

        @Headers({ "Content-Type: application/json" })
        @Put("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ServiceBus/namespaces/{namespaceName}/topics/{topicName}/subscriptions/{subscriptionName}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> createOrUpdate(@HostParam("$host") String endpoint,
            @PathParam("resourceGroupName") String resourceGroupName, @PathParam("namespaceName") String namespaceName,
            @PathParam("topicName") String topicName, @PathParam("subscriptionName") String subscriptionName,
            @QueryParam("api-version") String apiVersion, @PathParam("subscriptionId") String subscriptionId,
            @BodyParam("application/json") SBSubscriptionInner parameters, @HeaderParam("Accept") String accept,
            Context context);

        @Headers({ "Content-Type: application/json" })
        @Delete("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ServiceBus/namespaces/{namespaceName}/topics/{topicName}/subscriptions/{subscriptionName}")
        @ExpectedResponses({ 200, 204 })
        @UnexpectedResponseExceptionType(ManagementException.class)
        Mono> delete(@HostParam("$host") String endpoint,
            @PathParam("resourceGroupName") String resourceGroupName, @PathParam("namespaceName") String namespaceName,
            @PathParam("topicName") String topicName, @PathParam("subscriptionName") String subscriptionName,
            @QueryParam("api-version") String apiVersion, @PathParam("subscriptionId") String subscriptionId,
            @HeaderParam("Accept") String accept, Context context);

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

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

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param skip Skip is only used if a previous operation returned a partial result. If a previous response contains
     * a nextLink element, the value of the nextLink element will include a skip parameter that specifies a starting
     * point to use for subsequent calls.
     * @param top May be used to limit the number of results to the most recent N usageDetails.
     * @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 response to the List Subscriptions operation along with {@link PagedResponse} on successful
     * completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByTopicSinglePageAsync(String resourceGroupName,
        String namespaceName, String topicName, Integer skip, Integer top) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName 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.listByTopic(this.client.getEndpoint(), resourceGroupName, namespaceName,
                topicName, this.client.getApiVersion(), this.client.getSubscriptionId(), skip, 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 all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param skip Skip is only used if a previous operation returned a partial result. If a previous response contains
     * a nextLink element, the value of the nextLink element will include a skip parameter that specifies a starting
     * point to use for subsequent calls.
     * @param top May be used to limit the number of results to the most recent N usageDetails.
     * @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 response to the List Subscriptions operation along with {@link PagedResponse} on successful
     * completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByTopicSinglePageAsync(String resourceGroupName,
        String namespaceName, String topicName, Integer skip, 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 (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName 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
            .listByTopic(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName,
                this.client.getApiVersion(), this.client.getSubscriptionId(), skip, top, accept, context)
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                res.getValue().value(), res.getValue().nextLink(), null));
    }

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param skip Skip is only used if a previous operation returned a partial result. If a previous response contains
     * a nextLink element, the value of the nextLink element will include a skip parameter that specifies a starting
     * point to use for subsequent calls.
     * @param top May be used to limit the number of results to the most recent N usageDetails.
     * @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 response to the List Subscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedFlux listByTopicAsync(String resourceGroupName, String namespaceName,
        String topicName, Integer skip, Integer top) {
        return new PagedFlux<>(() -> listByTopicSinglePageAsync(resourceGroupName, namespaceName, topicName, skip, top),
            nextLink -> listByTopicNextSinglePageAsync(nextLink));
    }

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @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 response to the List Subscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedFlux listByTopicAsync(String resourceGroupName, String namespaceName,
        String topicName) {
        final Integer skip = null;
        final Integer top = null;
        return new PagedFlux<>(() -> listByTopicSinglePageAsync(resourceGroupName, namespaceName, topicName, skip, top),
            nextLink -> listByTopicNextSinglePageAsync(nextLink));
    }

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param skip Skip is only used if a previous operation returned a partial result. If a previous response contains
     * a nextLink element, the value of the nextLink element will include a skip parameter that specifies a starting
     * point to use for subsequent calls.
     * @param top May be used to limit the number of results to the most recent N usageDetails.
     * @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 response to the List Subscriptions operation as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    private PagedFlux listByTopicAsync(String resourceGroupName, String namespaceName,
        String topicName, Integer skip, Integer top, Context context) {
        return new PagedFlux<>(
            () -> listByTopicSinglePageAsync(resourceGroupName, namespaceName, topicName, skip, top, context),
            nextLink -> listByTopicNextSinglePageAsync(nextLink, context));
    }

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @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 response to the List Subscriptions operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listByTopic(String resourceGroupName, String namespaceName,
        String topicName) {
        final Integer skip = null;
        final Integer top = null;
        return new PagedIterable<>(listByTopicAsync(resourceGroupName, namespaceName, topicName, skip, top));
    }

    /**
     * List all the subscriptions under a specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param skip Skip is only used if a previous operation returned a partial result. If a previous response contains
     * a nextLink element, the value of the nextLink element will include a skip parameter that specifies a starting
     * point to use for subsequent calls.
     * @param top May be used to limit the number of results to the most recent N usageDetails.
     * @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 response to the List Subscriptions operation as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable listByTopic(String resourceGroupName, String namespaceName,
        String topicName, Integer skip, Integer top, Context context) {
        return new PagedIterable<>(listByTopicAsync(resourceGroupName, namespaceName, topicName, skip, top, context));
    }

    /**
     * Creates a topic subscription.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @param parameters Parameters supplied to create a subscription resource.
     * @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 description of subscription resource along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Mono> createOrUpdateWithResponseAsync(String resourceGroupName,
        String namespaceName, String topicName, String subscriptionName, SBSubscriptionInner parameters) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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 (parameters == null) {
            return Mono.error(new IllegalArgumentException("Parameter parameters is required and cannot be null."));
        } else {
            parameters.validate();
        }
        final String accept = "application/json";
        return FluxUtil
            .withContext(context -> service.createOrUpdate(this.client.getEndpoint(), resourceGroupName, namespaceName,
                topicName, subscriptionName, this.client.getApiVersion(), this.client.getSubscriptionId(), parameters,
                accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Creates a topic subscription.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @param parameters Parameters supplied to create a subscription resource.
     * @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 description of subscription resource along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> createOrUpdateWithResponseAsync(String resourceGroupName,
        String namespaceName, String topicName, String subscriptionName, SBSubscriptionInner parameters,
        Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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 (parameters == null) {
            return Mono.error(new IllegalArgumentException("Parameter parameters is required and cannot be null."));
        } else {
            parameters.validate();
        }
        final String accept = "application/json";
        context = this.client.mergeContext(context);
        return service.createOrUpdate(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName,
            subscriptionName, this.client.getApiVersion(), this.client.getSubscriptionId(), parameters, accept,
            context);
    }

    /**
     * Creates a topic subscription.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @param parameters Parameters supplied to create a subscription resource.
     * @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 description of subscription resource on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Mono createOrUpdateAsync(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName, SBSubscriptionInner parameters) {
        return createOrUpdateWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName,
            parameters).flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Creates a topic subscription.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @param parameters Parameters supplied to create a subscription resource.
     * @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 description of subscription resource along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response createOrUpdateWithResponse(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName, SBSubscriptionInner parameters, Context context) {
        return createOrUpdateWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName,
            parameters, context).block();
    }

    /**
     * Creates a topic subscription.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @param parameters Parameters supplied to create a subscription resource.
     * @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 description of subscription resource.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SBSubscriptionInner createOrUpdate(String resourceGroupName, String namespaceName, String topicName,
        String subscriptionName, SBSubscriptionInner parameters) {
        return createOrUpdateWithResponse(resourceGroupName, namespaceName, topicName, subscriptionName, parameters,
            Context.NONE).getValue();
    }

    /**
     * Deletes a subscription from the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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)
    public Mono> deleteWithResponseAsync(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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.delete(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName,
                    subscriptionName, this.client.getApiVersion(), this.client.getSubscriptionId(), accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Deletes a subscription from the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 namespaceName,
        String topicName, String subscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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.delete(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName, subscriptionName,
            this.client.getApiVersion(), this.client.getSubscriptionId(), accept, context);
    }

    /**
     * Deletes a subscription from the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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)
    public Mono deleteAsync(String resourceGroupName, String namespaceName, String topicName,
        String subscriptionName) {
        return deleteWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName)
            .flatMap(ignored -> Mono.empty());
    }

    /**
     * Deletes a subscription from the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response deleteWithResponse(String resourceGroupName, String namespaceName, String topicName,
        String subscriptionName, Context context) {
        return deleteWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName, context).block();
    }

    /**
     * Deletes a subscription from the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 namespaceName, String topicName, String subscriptionName) {
        deleteWithResponse(resourceGroupName, namespaceName, topicName, subscriptionName, Context.NONE);
    }

    /**
     * Returns a subscription description for the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 description of subscription resource along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Mono> getWithResponseAsync(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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.get(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName,
                subscriptionName, this.client.getApiVersion(), this.client.getSubscriptionId(), accept, context))
            .contextWrite(context -> context.putAll(FluxUtil.toReactorContext(this.client.getContext()).readOnly()));
    }

    /**
     * Returns a subscription description for the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 description of subscription resource along with {@link Response} on successful completion of
     * {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> getWithResponseAsync(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName, Context context) {
        if (this.client.getEndpoint() == null) {
            return Mono.error(
                new IllegalArgumentException("Parameter this.client.getEndpoint() is required and cannot be null."));
        }
        if (resourceGroupName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null."));
        }
        if (namespaceName == null) {
            return Mono.error(new IllegalArgumentException("Parameter namespaceName is required and cannot be null."));
        }
        if (topicName == null) {
            return Mono.error(new IllegalArgumentException("Parameter topicName is required and cannot be null."));
        }
        if (subscriptionName == null) {
            return Mono
                .error(new IllegalArgumentException("Parameter subscriptionName 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.get(this.client.getEndpoint(), resourceGroupName, namespaceName, topicName, subscriptionName,
            this.client.getApiVersion(), this.client.getSubscriptionId(), accept, context);
    }

    /**
     * Returns a subscription description for the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 description of subscription resource on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Mono getAsync(String resourceGroupName, String namespaceName, String topicName,
        String subscriptionName) {
        return getWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName)
            .flatMap(res -> Mono.justOrEmpty(res.getValue()));
    }

    /**
     * Returns a subscription description for the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 description of subscription resource along with {@link Response}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public Response getWithResponse(String resourceGroupName, String namespaceName,
        String topicName, String subscriptionName, Context context) {
        return getWithResponseAsync(resourceGroupName, namespaceName, topicName, subscriptionName, context).block();
    }

    /**
     * Returns a subscription description for the specified topic.
     * 
     * @param resourceGroupName Name of the Resource group within the Azure subscription.
     * @param namespaceName The namespace name.
     * @param topicName The topic name.
     * @param subscriptionName The subscription name.
     * @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 description of subscription resource.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    public SBSubscriptionInner get(String resourceGroupName, String namespaceName, String topicName,
        String subscriptionName) {
        return getWithResponse(resourceGroupName, namespaceName, topicName, subscriptionName, Context.NONE).getValue();
    }

    /**
     * Get the next page of items.
     * 
     * @param nextLink The URL to get the next list of items.
     * @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 response to the List Subscriptions operation along with {@link PagedResponse} on successful
     * completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByTopicNextSinglePageAsync(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.listByTopicNext(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.
     * @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 response to the List Subscriptions operation along with {@link PagedResponse} on successful
     * completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono> listByTopicNextSinglePageAsync(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.listByTopicNext(nextLink, this.client.getEndpoint(), accept, context)
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                res.getValue().value(), res.getValue().nextLink(), null));
    }
}