/*
 * Copyright 2025 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.cloud.pubsub.v1.stub;

import static com.google.cloud.pubsub.v1.TopicAdminClient.ListTopicSnapshotsPagedResponse;
import static com.google.cloud.pubsub.v1.TopicAdminClient.ListTopicSubscriptionsPagedResponse;
import static com.google.cloud.pubsub.v1.TopicAdminClient.ListTopicsPagedResponse;

import com.google.api.core.InternalApi;
import com.google.api.gax.core.BackgroundResource;
import com.google.api.gax.core.BackgroundResourceAggregation;
import com.google.api.gax.httpjson.ApiMethodDescriptor;
import com.google.api.gax.httpjson.HttpJsonCallSettings;
import com.google.api.gax.httpjson.HttpJsonStubCallableFactory;
import com.google.api.gax.httpjson.ProtoMessageRequestFormatter;
import com.google.api.gax.httpjson.ProtoMessageResponseParser;
import com.google.api.gax.httpjson.ProtoRestSerializer;
import com.google.api.gax.rpc.ClientContext;
import com.google.api.gax.rpc.RequestParamsBuilder;
import com.google.api.gax.rpc.UnaryCallable;
import com.google.iam.v1.GetIamPolicyRequest;
import com.google.iam.v1.Policy;
import com.google.iam.v1.SetIamPolicyRequest;
import com.google.iam.v1.TestIamPermissionsRequest;
import com.google.iam.v1.TestIamPermissionsResponse;
import com.google.protobuf.Empty;
import com.google.protobuf.TypeRegistry;
import com.google.pubsub.v1.DeleteTopicRequest;
import com.google.pubsub.v1.DetachSubscriptionRequest;
import com.google.pubsub.v1.DetachSubscriptionResponse;
import com.google.pubsub.v1.GetTopicRequest;
import com.google.pubsub.v1.ListTopicSnapshotsRequest;
import com.google.pubsub.v1.ListTopicSnapshotsResponse;
import com.google.pubsub.v1.ListTopicSubscriptionsRequest;
import com.google.pubsub.v1.ListTopicSubscriptionsResponse;
import com.google.pubsub.v1.ListTopicsRequest;
import com.google.pubsub.v1.ListTopicsResponse;
import com.google.pubsub.v1.PublishRequest;
import com.google.pubsub.v1.PublishResponse;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.UpdateTopicRequest;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.annotation.Generated;

// AUTO-GENERATED DOCUMENTATION AND CLASS.
/**
 * REST stub implementation for the Publisher service API.
 *
 * <p>This class is for advanced usage and reflects the underlying API directly.
 */
@Generated("by gapic-generator-java")
public class HttpJsonPublisherStub extends PublisherStub {
  private static final TypeRegistry typeRegistry = TypeRegistry.newBuilder().build();

  private static final ApiMethodDescriptor<Topic, Topic> createTopicMethodDescriptor =
      ApiMethodDescriptor.<Topic, Topic>newBuilder()
          .setFullMethodName("google.pubsub.v1.Publisher/CreateTopic")
          .setHttpMethod("PUT")
          .setType(ApiMethodDescriptor.MethodType.UNARY)
          .setRequestFormatter(
              ProtoMessageRequestFormatter.<Topic>newBuilder()
                  .setPath(
                      "/v1/{name=projects/*/topics/*}",
                      request -> {
                        Map<String, String> fields = new HashMap<>();
                        ProtoRestSerializer<Topic> serializer = ProtoRestSerializer.create();
                        serializer.putPathParam(fields, "name", request.getName());
                        return fields;
                      })
                  .setQueryParamsExtractor(
                      request -> {
                        Map<String, List<String>> fields = new HashMap<>();
                        ProtoRestSerializer<Topic> serializer = ProtoRestSerializer.create();
                        serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                        return fields;
                      })
                  .setRequestBodyExtractor(
                      request ->
                          ProtoRestSerializer.create()
                              .toBody("*", request.toBuilder().clearName().build(), true))
                  .build())
          .setResponseParser(
              ProtoMessageResponseParser.<Topic>newBuilder()
                  .setDefaultInstance(Topic.getDefaultInstance())
                  .setDefaultTypeRegistry(typeRegistry)
                  .build())
          .build();

  private static final ApiMethodDescriptor<UpdateTopicRequest, Topic> updateTopicMethodDescriptor =
      ApiMethodDescriptor.<UpdateTopicRequest, Topic>newBuilder()
          .setFullMethodName("google.pubsub.v1.Publisher/UpdateTopic")
          .setHttpMethod("PATCH")
          .setType(ApiMethodDescriptor.MethodType.UNARY)
          .setRequestFormatter(
              ProtoMessageRequestFormatter.<UpdateTopicRequest>newBuilder()
                  .setPath(
                      "/v1/{topic.name=projects/*/topics/*}",
                      request -> {
                        Map<String, String> fields = new HashMap<>();
                        ProtoRestSerializer<UpdateTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putPathParam(fields, "topic.name", request.getTopic().getName());
                        return fields;
                      })
                  .setQueryParamsExtractor(
                      request -> {
                        Map<String, List<String>> fields = new HashMap<>();
                        ProtoRestSerializer<UpdateTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                        return fields;
                      })
                  .setRequestBodyExtractor(
                      request ->
                          ProtoRestSerializer.create()
                              .toBody("*", request.toBuilder().build(), true))
                  .build())
          .setResponseParser(
              ProtoMessageResponseParser.<Topic>newBuilder()
                  .setDefaultInstance(Topic.getDefaultInstance())
                  .setDefaultTypeRegistry(typeRegistry)
                  .build())
          .build();

  private static final ApiMethodDescriptor<PublishRequest, PublishResponse>
      publishMethodDescriptor =
          ApiMethodDescriptor.<PublishRequest, PublishResponse>newBuilder()
              .setFullMethodName("google.pubsub.v1.Publisher/Publish")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<PublishRequest>newBuilder()
                      .setPath(
                          "/v1/{topic=projects/*/topics/*}:publish",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<PublishRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "topic", request.getTopic());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<PublishRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("*", request.toBuilder().clearTopic().build(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<PublishResponse>newBuilder()
                      .setDefaultInstance(PublishResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<GetTopicRequest, Topic> getTopicMethodDescriptor =
      ApiMethodDescriptor.<GetTopicRequest, Topic>newBuilder()
          .setFullMethodName("google.pubsub.v1.Publisher/GetTopic")
          .setHttpMethod("GET")
          .setType(ApiMethodDescriptor.MethodType.UNARY)
          .setRequestFormatter(
              ProtoMessageRequestFormatter.<GetTopicRequest>newBuilder()
                  .setPath(
                      "/v1/{topic=projects/*/topics/*}",
                      request -> {
                        Map<String, String> fields = new HashMap<>();
                        ProtoRestSerializer<GetTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putPathParam(fields, "topic", request.getTopic());
                        return fields;
                      })
                  .setQueryParamsExtractor(
                      request -> {
                        Map<String, List<String>> fields = new HashMap<>();
                        ProtoRestSerializer<GetTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                        return fields;
                      })
                  .setRequestBodyExtractor(request -> null)
                  .build())
          .setResponseParser(
              ProtoMessageResponseParser.<Topic>newBuilder()
                  .setDefaultInstance(Topic.getDefaultInstance())
                  .setDefaultTypeRegistry(typeRegistry)
                  .build())
          .build();

  private static final ApiMethodDescriptor<ListTopicsRequest, ListTopicsResponse>
      listTopicsMethodDescriptor =
          ApiMethodDescriptor.<ListTopicsRequest, ListTopicsResponse>newBuilder()
              .setFullMethodName("google.pubsub.v1.Publisher/ListTopics")
              .setHttpMethod("GET")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ListTopicsRequest>newBuilder()
                      .setPath(
                          "/v1/{project=projects/*}/topics",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "project", request.getProject());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "pageSize", request.getPageSize());
                            serializer.putQueryParam(fields, "pageToken", request.getPageToken());
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<ListTopicsResponse>newBuilder()
                      .setDefaultInstance(ListTopicsResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<
          ListTopicSubscriptionsRequest, ListTopicSubscriptionsResponse>
      listTopicSubscriptionsMethodDescriptor =
          ApiMethodDescriptor
              .<ListTopicSubscriptionsRequest, ListTopicSubscriptionsResponse>newBuilder()
              .setFullMethodName("google.pubsub.v1.Publisher/ListTopicSubscriptions")
              .setHttpMethod("GET")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ListTopicSubscriptionsRequest>newBuilder()
                      .setPath(
                          "/v1/{topic=projects/*/topics/*}/subscriptions",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicSubscriptionsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "topic", request.getTopic());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicSubscriptionsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "pageSize", request.getPageSize());
                            serializer.putQueryParam(fields, "pageToken", request.getPageToken());
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<ListTopicSubscriptionsResponse>newBuilder()
                      .setDefaultInstance(ListTopicSubscriptionsResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<ListTopicSnapshotsRequest, ListTopicSnapshotsResponse>
      listTopicSnapshotsMethodDescriptor =
          ApiMethodDescriptor.<ListTopicSnapshotsRequest, ListTopicSnapshotsResponse>newBuilder()
              .setFullMethodName("google.pubsub.v1.Publisher/ListTopicSnapshots")
              .setHttpMethod("GET")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ListTopicSnapshotsRequest>newBuilder()
                      .setPath(
                          "/v1/{topic=projects/*/topics/*}/snapshots",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicSnapshotsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "topic", request.getTopic());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ListTopicSnapshotsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "pageSize", request.getPageSize());
                            serializer.putQueryParam(fields, "pageToken", request.getPageToken());
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<ListTopicSnapshotsResponse>newBuilder()
                      .setDefaultInstance(ListTopicSnapshotsResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<DeleteTopicRequest, Empty> deleteTopicMethodDescriptor =
      ApiMethodDescriptor.<DeleteTopicRequest, Empty>newBuilder()
          .setFullMethodName("google.pubsub.v1.Publisher/DeleteTopic")
          .setHttpMethod("DELETE")
          .setType(ApiMethodDescriptor.MethodType.UNARY)
          .setRequestFormatter(
              ProtoMessageRequestFormatter.<DeleteTopicRequest>newBuilder()
                  .setPath(
                      "/v1/{topic=projects/*/topics/*}",
                      request -> {
                        Map<String, String> fields = new HashMap<>();
                        ProtoRestSerializer<DeleteTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putPathParam(fields, "topic", request.getTopic());
                        return fields;
                      })
                  .setQueryParamsExtractor(
                      request -> {
                        Map<String, List<String>> fields = new HashMap<>();
                        ProtoRestSerializer<DeleteTopicRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                        return fields;
                      })
                  .setRequestBodyExtractor(request -> null)
                  .build())
          .setResponseParser(
              ProtoMessageResponseParser.<Empty>newBuilder()
                  .setDefaultInstance(Empty.getDefaultInstance())
                  .setDefaultTypeRegistry(typeRegistry)
                  .build())
          .build();

  private static final ApiMethodDescriptor<DetachSubscriptionRequest, DetachSubscriptionResponse>
      detachSubscriptionMethodDescriptor =
          ApiMethodDescriptor.<DetachSubscriptionRequest, DetachSubscriptionResponse>newBuilder()
              .setFullMethodName("google.pubsub.v1.Publisher/DetachSubscription")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<DetachSubscriptionRequest>newBuilder()
                      .setPath(
                          "/v1/{subscription=projects/*/subscriptions/*}:detach",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<DetachSubscriptionRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(
                                fields, "subscription", request.getSubscription());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<DetachSubscriptionRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<DetachSubscriptionResponse>newBuilder()
                      .setDefaultInstance(DetachSubscriptionResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<SetIamPolicyRequest, Policy>
      setIamPolicyMethodDescriptor =
          ApiMethodDescriptor.<SetIamPolicyRequest, Policy>newBuilder()
              .setFullMethodName("google.iam.v1.IAMPolicy/SetIamPolicy")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<SetIamPolicyRequest>newBuilder()
                      .setPath(
                          "/v1/{resource=projects/*/topics/*}:setIamPolicy",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<SetIamPolicyRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "resource", request.getResource());
                            return fields;
                          })
                      .setAdditionalPaths(
                          "/v1/{resource=projects/*/subscriptions/*}:setIamPolicy",
                          "/v1/{resource=projects/*/snapshots/*}:setIamPolicy",
                          "/v1/{resource=projects/*/schemas/*}:setIamPolicy")
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<SetIamPolicyRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("*", request.toBuilder().clearResource().build(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Policy>newBuilder()
                      .setDefaultInstance(Policy.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<GetIamPolicyRequest, Policy>
      getIamPolicyMethodDescriptor =
          ApiMethodDescriptor.<GetIamPolicyRequest, Policy>newBuilder()
              .setFullMethodName("google.iam.v1.IAMPolicy/GetIamPolicy")
              .setHttpMethod("GET")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<GetIamPolicyRequest>newBuilder()
                      .setPath(
                          "/v1/{resource=projects/*/topics/*}:getIamPolicy",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<GetIamPolicyRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "resource", request.getResource());
                            return fields;
                          })
                      .setAdditionalPaths(
                          "/v1/{resource=projects/*/subscriptions/*}:getIamPolicy",
                          "/v1/{resource=projects/*/snapshots/*}:getIamPolicy",
                          "/v1/{resource=projects/*/schemas/*}:getIamPolicy")
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<GetIamPolicyRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Policy>newBuilder()
                      .setDefaultInstance(Policy.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private static final ApiMethodDescriptor<TestIamPermissionsRequest, TestIamPermissionsResponse>
      testIamPermissionsMethodDescriptor =
          ApiMethodDescriptor.<TestIamPermissionsRequest, TestIamPermissionsResponse>newBuilder()
              .setFullMethodName("google.iam.v1.IAMPolicy/TestIamPermissions")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<TestIamPermissionsRequest>newBuilder()
                      .setPath(
                          "/v1/{resource=projects/*/subscriptions/*}:testIamPermissions",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<TestIamPermissionsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "resource", request.getResource());
                            return fields;
                          })
                      .setAdditionalPaths(
                          "/v1/{resource=projects/*/topics/*}:testIamPermissions",
                          "/v1/{resource=projects/*/snapshots/*}:testIamPermissions",
                          "/v1/{resource=projects/*/schemas/*}:testIamPermissions")
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<TestIamPermissionsRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("*", request.toBuilder().clearResource().build(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<TestIamPermissionsResponse>newBuilder()
                      .setDefaultInstance(TestIamPermissionsResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private final UnaryCallable<Topic, Topic> createTopicCallable;
  private final UnaryCallable<UpdateTopicRequest, Topic> updateTopicCallable;
  private final UnaryCallable<PublishRequest, PublishResponse> publishCallable;
  private final UnaryCallable<GetTopicRequest, Topic> getTopicCallable;
  private final UnaryCallable<ListTopicsRequest, ListTopicsResponse> listTopicsCallable;
  private final UnaryCallable<ListTopicsRequest, ListTopicsPagedResponse> listTopicsPagedCallable;
  private final UnaryCallable<ListTopicSubscriptionsRequest, ListTopicSubscriptionsResponse>
      listTopicSubscriptionsCallable;
  private final UnaryCallable<ListTopicSubscriptionsRequest, ListTopicSubscriptionsPagedResponse>
      listTopicSubscriptionsPagedCallable;
  private final UnaryCallable<ListTopicSnapshotsRequest, ListTopicSnapshotsResponse>
      listTopicSnapshotsCallable;
  private final UnaryCallable<ListTopicSnapshotsRequest, ListTopicSnapshotsPagedResponse>
      listTopicSnapshotsPagedCallable;
  private final UnaryCallable<DeleteTopicRequest, Empty> deleteTopicCallable;
  private final UnaryCallable<DetachSubscriptionRequest, DetachSubscriptionResponse>
      detachSubscriptionCallable;
  private final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable;
  private final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable;
  private final UnaryCallable<TestIamPermissionsRequest, TestIamPermissionsResponse>
      testIamPermissionsCallable;

  private final BackgroundResource backgroundResources;
  private final HttpJsonStubCallableFactory callableFactory;

  public static final HttpJsonPublisherStub create(PublisherStubSettings settings)
      throws IOException {
    return new HttpJsonPublisherStub(settings, ClientContext.create(settings));
  }

  public static final HttpJsonPublisherStub create(ClientContext clientContext) throws IOException {
    return new HttpJsonPublisherStub(
        PublisherStubSettings.newHttpJsonBuilder().build(), clientContext);
  }

  public static final HttpJsonPublisherStub create(
      ClientContext clientContext, HttpJsonStubCallableFactory callableFactory) throws IOException {
    return new HttpJsonPublisherStub(
        PublisherStubSettings.newHttpJsonBuilder().build(), clientContext, callableFactory);
  }

  /**
   * Constructs an instance of HttpJsonPublisherStub, using the given settings. This is protected so
   * that it is easy to make a subclass, but otherwise, the static factory methods should be
   * preferred.
   */
  protected HttpJsonPublisherStub(PublisherStubSettings settings, ClientContext clientContext)
      throws IOException {
    this(settings, clientContext, new HttpJsonPublisherCallableFactory());
  }

  /**
   * Constructs an instance of HttpJsonPublisherStub, using the given settings. This is protected so
   * that it is easy to make a subclass, but otherwise, the static factory methods should be
   * preferred.
   */
  protected HttpJsonPublisherStub(
      PublisherStubSettings settings,
      ClientContext clientContext,
      HttpJsonStubCallableFactory callableFactory)
      throws IOException {
    this.callableFactory = callableFactory;

    HttpJsonCallSettings<Topic, Topic> createTopicTransportSettings =
        HttpJsonCallSettings.<Topic, Topic>newBuilder()
            .setMethodDescriptor(createTopicMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("name", String.valueOf(request.getName()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<UpdateTopicRequest, Topic> updateTopicTransportSettings =
        HttpJsonCallSettings.<UpdateTopicRequest, Topic>newBuilder()
            .setMethodDescriptor(updateTopicMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("topic.name", String.valueOf(request.getTopic().getName()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<PublishRequest, PublishResponse> publishTransportSettings =
        HttpJsonCallSettings.<PublishRequest, PublishResponse>newBuilder()
            .setMethodDescriptor(publishMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("topic", String.valueOf(request.getTopic()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<GetTopicRequest, Topic> getTopicTransportSettings =
        HttpJsonCallSettings.<GetTopicRequest, Topic>newBuilder()
            .setMethodDescriptor(getTopicMethodDescriptor)
