google-cloud-datastore/src/main/java/com/google/cloud/datastore/admin/v1/stub/HttpJsonDatastoreAdminStub.java

/*
 * Copyright 2024 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.datastore.admin.v1.stub;

import static com.google.cloud.datastore.admin.v1.DatastoreAdminClient.ListIndexesPagedResponse;

import com.google.api.HttpRule;
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.HttpJsonOperationSnapshot;
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.httpjson.longrunning.stub.HttpJsonOperationsStub;
import com.google.api.gax.rpc.ClientContext;
import com.google.api.gax.rpc.OperationCallable;
import com.google.api.gax.rpc.RequestParamsBuilder;
import com.google.api.gax.rpc.UnaryCallable;
import com.google.common.collect.ImmutableMap;
import com.google.datastore.admin.v1.CreateIndexRequest;
import com.google.datastore.admin.v1.DeleteIndexRequest;
import com.google.datastore.admin.v1.ExportEntitiesMetadata;
import com.google.datastore.admin.v1.ExportEntitiesRequest;
import com.google.datastore.admin.v1.ExportEntitiesResponse;
import com.google.datastore.admin.v1.GetIndexRequest;
import com.google.datastore.admin.v1.ImportEntitiesMetadata;
import com.google.datastore.admin.v1.ImportEntitiesRequest;
import com.google.datastore.admin.v1.Index;
import com.google.datastore.admin.v1.IndexOperationMetadata;
import com.google.datastore.admin.v1.ListIndexesRequest;
import com.google.datastore.admin.v1.ListIndexesResponse;
import com.google.longrunning.Operation;
import com.google.protobuf.Empty;
import com.google.protobuf.TypeRegistry;
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 DatastoreAdmin service API.
 *
 * <p>This class is for advanced usage and reflects the underlying API directly.
 */
@Generated("by gapic-generator-java")
public class HttpJsonDatastoreAdminStub extends DatastoreAdminStub {
  private static final TypeRegistry typeRegistry =
      TypeRegistry.newBuilder()
          .add(Empty.getDescriptor())
          .add(ExportEntitiesResponse.getDescriptor())
          .add(IndexOperationMetadata.getDescriptor())
          .add(Index.getDescriptor())
          .add(ExportEntitiesMetadata.getDescriptor())
          .add(ImportEntitiesMetadata.getDescriptor())
          .build();

  private static final ApiMethodDescriptor<ExportEntitiesRequest, Operation>
      exportEntitiesMethodDescriptor =
          ApiMethodDescriptor.<ExportEntitiesRequest, Operation>newBuilder()
              .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/ExportEntities")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ExportEntitiesRequest>newBuilder()
                      .setPath(
                          "/v1/projects/{projectId}:export",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ExportEntitiesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "projectId", request.getProjectId());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ExportEntitiesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("*", request.toBuilder().clearProjectId().build(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Operation>newBuilder()
                      .setDefaultInstance(Operation.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .setOperationSnapshotFactory(
                  (ExportEntitiesRequest request, Operation response) ->
                      HttpJsonOperationSnapshot.create(response))
              .build();

  private static final ApiMethodDescriptor<ImportEntitiesRequest, Operation>
      importEntitiesMethodDescriptor =
          ApiMethodDescriptor.<ImportEntitiesRequest, Operation>newBuilder()
              .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/ImportEntities")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ImportEntitiesRequest>newBuilder()
                      .setPath(
                          "/v1/projects/{projectId}:import",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ImportEntitiesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "projectId", request.getProjectId());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ImportEntitiesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("*", request.toBuilder().clearProjectId().build(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Operation>newBuilder()
                      .setDefaultInstance(Operation.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .setOperationSnapshotFactory(
                  (ImportEntitiesRequest request, Operation response) ->
                      HttpJsonOperationSnapshot.create(response))
              .build();

  private static final ApiMethodDescriptor<CreateIndexRequest, Operation>
      createIndexMethodDescriptor =
          ApiMethodDescriptor.<CreateIndexRequest, Operation>newBuilder()
              .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/CreateIndex")
              .setHttpMethod("POST")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<CreateIndexRequest>newBuilder()
                      .setPath(
                          "/v1/projects/{projectId}/indexes",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<CreateIndexRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "projectId", request.getProjectId());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<CreateIndexRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(
                          request ->
                              ProtoRestSerializer.create()
                                  .toBody("index", request.getIndex(), true))
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Operation>newBuilder()
                      .setDefaultInstance(Operation.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .setOperationSnapshotFactory(
                  (CreateIndexRequest request, Operation response) ->
                      HttpJsonOperationSnapshot.create(response))
              .build();

  private static final ApiMethodDescriptor<DeleteIndexRequest, Operation>
      deleteIndexMethodDescriptor =
          ApiMethodDescriptor.<DeleteIndexRequest, Operation>newBuilder()
              .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/DeleteIndex")
              .setHttpMethod("DELETE")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<DeleteIndexRequest>newBuilder()
                      .setPath(
                          "/v1/projects/{projectId}/indexes/{indexId}",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<DeleteIndexRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "indexId", request.getIndexId());
                            serializer.putPathParam(fields, "projectId", request.getProjectId());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<DeleteIndexRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                            return fields;
                          })
                      .setRequestBodyExtractor(request -> null)
                      .build())
              .setResponseParser(
                  ProtoMessageResponseParser.<Operation>newBuilder()
                      .setDefaultInstance(Operation.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .setOperationSnapshotFactory(
                  (DeleteIndexRequest request, Operation response) ->
                      HttpJsonOperationSnapshot.create(response))
              .build();

  private static final ApiMethodDescriptor<GetIndexRequest, Index> getIndexMethodDescriptor =
      ApiMethodDescriptor.<GetIndexRequest, Index>newBuilder()
          .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/GetIndex")
          .setHttpMethod("GET")
          .setType(ApiMethodDescriptor.MethodType.UNARY)
          .setRequestFormatter(
              ProtoMessageRequestFormatter.<GetIndexRequest>newBuilder()
                  .setPath(
                      "/v1/projects/{projectId}/indexes/{indexId}",
                      request -> {
                        Map<String, String> fields = new HashMap<>();
                        ProtoRestSerializer<GetIndexRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putPathParam(fields, "indexId", request.getIndexId());
                        serializer.putPathParam(fields, "projectId", request.getProjectId());
                        return fields;
                      })
                  .setQueryParamsExtractor(
                      request -> {
                        Map<String, List<String>> fields = new HashMap<>();
                        ProtoRestSerializer<GetIndexRequest> serializer =
                            ProtoRestSerializer.create();
                        serializer.putQueryParam(fields, "$alt", "json;enum-encoding=int");
                        return fields;
                      })
                  .setRequestBodyExtractor(request -> null)
                  .build())
          .setResponseParser(
              ProtoMessageResponseParser.<Index>newBuilder()
                  .setDefaultInstance(Index.getDefaultInstance())
                  .setDefaultTypeRegistry(typeRegistry)
                  .build())
          .build();

  private static final ApiMethodDescriptor<ListIndexesRequest, ListIndexesResponse>
      listIndexesMethodDescriptor =
          ApiMethodDescriptor.<ListIndexesRequest, ListIndexesResponse>newBuilder()
              .setFullMethodName("google.datastore.admin.v1.DatastoreAdmin/ListIndexes")
              .setHttpMethod("GET")
              .setType(ApiMethodDescriptor.MethodType.UNARY)
              .setRequestFormatter(
                  ProtoMessageRequestFormatter.<ListIndexesRequest>newBuilder()
                      .setPath(
                          "/v1/projects/{projectId}/indexes",
                          request -> {
                            Map<String, String> fields = new HashMap<>();
                            ProtoRestSerializer<ListIndexesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putPathParam(fields, "projectId", request.getProjectId());
                            return fields;
                          })
                      .setQueryParamsExtractor(
                          request -> {
                            Map<String, List<String>> fields = new HashMap<>();
                            ProtoRestSerializer<ListIndexesRequest> serializer =
                                ProtoRestSerializer.create();
                            serializer.putQueryParam(fields, "filter", request.getFilter());
                            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.<ListIndexesResponse>newBuilder()
                      .setDefaultInstance(ListIndexesResponse.getDefaultInstance())
                      .setDefaultTypeRegistry(typeRegistry)
                      .build())
              .build();

  private final UnaryCallable<ExportEntitiesRequest, Operation> exportEntitiesCallable;
  private final OperationCallable<
          ExportEntitiesRequest, ExportEntitiesResponse, ExportEntitiesMetadata>
      exportEntitiesOperationCallable;
  private final UnaryCallable<ImportEntitiesRequest, Operation> importEntitiesCallable;
  private final OperationCallable<ImportEntitiesRequest, Empty, ImportEntitiesMetadata>
      importEntitiesOperationCallable;
  private final UnaryCallable<CreateIndexRequest, Operation> createIndexCallable;
  private final OperationCallable<CreateIndexRequest, Index, IndexOperationMetadata>
      createIndexOperationCallable;
  private final UnaryCallable<DeleteIndexRequest, Operation> deleteIndexCallable;
  private final OperationCallable<DeleteIndexRequest, Index, IndexOperationMetadata>
      deleteIndexOperationCallable;
  private final UnaryCallable<GetIndexRequest, Index> getIndexCallable;
  private final UnaryCallable<ListIndexesRequest, ListIndexesResponse> listIndexesCallable;
  private final UnaryCallable<ListIndexesRequest, ListIndexesPagedResponse>
      listIndexesPagedCallable;

  private final BackgroundResource backgroundResources;
  private final HttpJsonOperationsStub httpJsonOperationsStub;
  private final HttpJsonStubCallableFactory callableFactory;

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

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

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

  /**
   * Constructs an instance of HttpJsonDatastoreAdminStub, 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 HttpJsonDatastoreAdminStub(
      DatastoreAdminStubSettings settings, ClientContext clientContext) throws IOException {
    this(settings, clientContext, new HttpJsonDatastoreAdminCallableFactory());
  }

  /**
   * Constructs an instance of HttpJsonDatastoreAdminStub, 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 HttpJsonDatastoreAdminStub(
      DatastoreAdminStubSettings settings,
      ClientContext clientContext,
      HttpJsonStubCallableFactory callableFactory)
      throws IOException {
    this.callableFactory = callableFactory;
    this.httpJsonOperationsStub =
        HttpJsonOperationsStub.create(
            clientContext,
            callableFactory,
            typeRegistry,
            ImmutableMap.<String, HttpRule>builder()
                .put(
                    "google.longrunning.Operations.CancelOperation",
                    HttpRule.newBuilder()
                        .setPost("/v1/{name=projects/*/operations/*}:cancel")
                        .build())
                .put(
                    "google.longrunning.Operations.DeleteOperation",
                    HttpRule.newBuilder().setDelete("/v1/{name=projects/*/operations/*}").build())
                .put(
                    "google.longrunning.Operations.GetOperation",
                    HttpRule.newBuilder().setGet("/v1/{name=projects/*/operations/*}").build())
                .put(
                    "google.longrunning.Operations.ListOperations",
                    HttpRule.newBuilder().setGet("/v1/{name=projects/*}/operations").build())
                .build());

    HttpJsonCallSettings<ExportEntitiesRequest, Operation> exportEntitiesTransportSettings =
        HttpJsonCallSettings.<ExportEntitiesRequest, Operation>newBuilder()
            .setMethodDescriptor(exportEntitiesMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<ImportEntitiesRequest, Operation> importEntitiesTransportSettings =
        HttpJsonCallSettings.<ImportEntitiesRequest, Operation>newBuilder()
            .setMethodDescriptor(importEntitiesMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<CreateIndexRequest, Operation> createIndexTransportSettings =
        HttpJsonCallSettings.<CreateIndexRequest, Operation>newBuilder()
            .setMethodDescriptor(createIndexMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<DeleteIndexRequest, Operation> deleteIndexTransportSettings =
        HttpJsonCallSettings.<DeleteIndexRequest, Operation>newBuilder()
            .setMethodDescriptor(deleteIndexMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("index_id", String.valueOf(request.getIndexId()));
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<GetIndexRequest, Index> getIndexTransportSettings =
        HttpJsonCallSettings.<GetIndexRequest, Index>newBuilder()
            .setMethodDescriptor(getIndexMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("index_id", String.valueOf(request.getIndexId()));
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();
    HttpJsonCallSettings<ListIndexesRequest, ListIndexesResponse> listIndexesTransportSettings =
        HttpJsonCallSettings.<ListIndexesRequest, ListIndexesResponse>newBuilder()
            .setMethodDescriptor(listIndexesMethodDescriptor)
            .setTypeRegistry(typeRegistry)
            .setParamsExtractor(
                request -> {
                  RequestParamsBuilder builder = RequestParamsBuilder.create();
                  builder.add("project_id", String.valueOf(request.getProjectId()));
                  return builder.build();
                })
            .build();

    this.exportEntitiesCallable =
        callableFactory.createUnaryCallable(
            exportEntitiesTransportSettings, settings.exportEntitiesSettings(), clientContext);
    this.exportEntitiesOperationCallable =
        callableFactory.createOperationCallable(
            exportEntitiesTransportSettings,
            settings.exportEntitiesOperationSettings(),
            clientContext,
            httpJsonOperationsStub);
    this.importEntitiesCallable =
        callableFactory.createUnaryCallable(
            importEntitiesTransportSettings, settings.importEntitiesSettings(), clientContext);
    this.importEntitiesOperationCallable =
        callableFactory.createOperationCallable(
            importEntitiesTransportSettings,
            settings.importEntitiesOperationSettings(),
            clientContext,
            httpJsonOperationsStub);
    this.createIndexCallable =
        callableFactory.createUnaryCallable(
            createIndexTransportSettings, settings.createIndexSettings(), clientContext);
    this.createIndexOperationCallable =
        callableFactory.createOperationCallable(
            createIndexTransportSettings,
            settings.createIndexOperationSettings(),
            clientContext,
            httpJsonOperationsStub);
    this.deleteIndexCallable =
        callableFactory.createUnaryCallable(
            deleteIndexTransportSettings, settings.deleteIndexSettings(), clientContext);
    this.deleteIndexOperationCallable =
        callableFactory.createOperationCallable(
            deleteIndexTransportSettings,
            settings.deleteIndexOperationSettings(),
            clientContext,
            httpJsonOperationsStub);
    this.getIndexCallable =
        callableFactory.createUnaryCallable(
            getIndexTransportSettings, settings.getIndexSettings(), clientContext);
    this.listIndexesCallable =
        callableFactory.createUnaryCallable(
            listIndexesTransportSettings, settings.listIndexesSettings(), clientContext);
    this.listIndexesPagedCallable =
        callableFactory.createPagedCallable(
            listIndexesTransportSettings, settings.listIndexesSettings(), clientContext);

    this.backgroundResources =
        new BackgroundResourceAggregation(clientContext.getBackgroundResources());
  }

  @InternalApi
  public static List<ApiMethodDescriptor> getMethodDescriptors() {
    List<ApiMethodDescriptor> methodDescriptors = new ArrayList<>();
    methodDescriptors.add(exportEntitiesMethodDescriptor);
    methodDescriptors.add(importEntitiesMethodDescriptor);
    methodDescriptors.add(createIndexMethodDescriptor);
    methodDescriptors.add(deleteIndexMethodDescriptor);
    methodDescriptors.add(getIndexMethodDescriptor);
    methodDescriptors.add(listIndexesMethodDescriptor);
    return methodDescriptors;
  }

  public HttpJsonOperationsStub getHttpJsonOperationsStub() {
    return httpJsonOperationsStub;
  }

  @Override
  public UnaryCallable<ExportEntitiesRequest, Operation> exportEntitiesCallable() {
    return exportEntitiesCallable;
  }

  @Override
  public OperationCallable<ExportEntitiesRequest, ExportEntitiesResponse, ExportEntitiesMetadata>
      exportEntitiesOperationCallable() {
    return exportEntitiesOperationCallable;
  }

  @Override
  public UnaryCallable<ImportEntitiesRequest, Operation> importEntitiesCallable() {
    return importEntitiesCallable;
  }

  @Override
  public OperationCallable<ImportEntitiesRequest, Empty, ImportEntitiesMetadata>
      importEntitiesOperationCallable() {
    return importEntitiesOperationCallable;
  }

  @Override
  public UnaryCallable<CreateIndexRequest, Operation> createIndexCallable() {
    return createIndexCallable;
  }

  @Override
  public OperationCallable<CreateIndexRequest, Index, IndexOperationMetadata>
      createIndexOperationCallable() {
    return createIndexOperationCallable;
  }

  @Override
  public UnaryCallable<DeleteIndexRequest, Operation> deleteIndexCallable() {
    return deleteIndexCallable;
  }

  @Override
  public OperationCallable<DeleteIndexRequest, Index, IndexOperationMetadata>
      deleteIndexOperationCallable() {
    return deleteIndexOperationCallable;
  }

  @Override
  public UnaryCallable<GetIndexRequest, Index> getIndexCallable() {
    return getIndexCallable;
  }

  @Override
  public UnaryCallable<ListIndexesRequest, ListIndexesResponse> listIndexesCallable() {
    return listIndexesCallable;
  }

  @Override
  public UnaryCallable<ListIndexesRequest, ListIndexesPagedResponse> listIndexesPagedCallable() {
    return listIndexesPagedCallable;
  }

  @Override
  public final void close() {
    try {
      backgroundResources.close();
    } catch (RuntimeException e) {
      throw e;
    } catch (Exception e) {
      throw new IllegalStateException("Failed to close resource", e);
    }
  }

  @Override
  public void shutdown() {
    backgroundResources.shutdown();
  }

  @Override
  public boolean isShutdown() {
    return backgroundResources.isShutdown();
  }

  @Override
  public boolean isTerminated() {
    return backgroundResources.isTerminated();
  }

  @Override
  public void shutdownNow() {
    backgroundResources.shutdownNow();
  }

  @Override
  public boolean awaitTermination(long duration, TimeUnit unit) throws InterruptedException {
    return backgroundResources.awaitTermination(duration, unit);
  }
}