/*
 * Copyright 2018 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.compute.v1;

import com.google.api.core.ApiFunction;
import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.api.core.BetaApi;
import com.google.api.gax.core.BackgroundResource;
import com.google.api.gax.paging.AbstractFixedSizeCollection;
import com.google.api.gax.paging.AbstractPage;
import com.google.api.gax.paging.AbstractPagedListResponse;
import com.google.api.gax.rpc.PageContext;
import com.google.api.gax.rpc.UnaryCallable;
import com.google.cloud.compute.v1.stub.SnapshotStub;
import com.google.cloud.compute.v1.stub.SnapshotStubSettings;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.annotation.Generated;

// AUTO-GENERATED DOCUMENTATION AND SERVICE
/**
 * Service Description: Creates and runs virtual machines on Google Cloud Platform.
 *
 * <p>This class provides the ability to make remote calls to the backing service through method
 * calls that map to API methods. Sample code to get started:
 *
 * <pre>
 * <code>
 * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
 *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
 *   Operation response = snapshotClient.deleteSnapshot(snapshot);
 * }
 * </code>
 * </pre>
 *
 * <p>Note: close() needs to be called on the snapshotClient object to clean up resources such as
 * threads. In the example above, try-with-resources is used, which automatically calls close().
 *
 * <p>The surface of this class includes several types of Java methods for each of the API's
 * methods:
 *
 * <ol>
 *   <li> A "flattened" method. With this type of method, the fields of the request type have been
 *       converted into function parameters. It may be the case that not all fields are available as
 *       parameters, and not every API method will have a flattened method entry point.
 *   <li> A "request object" method. This type of method only takes one parameter, a request object,
 *       which must be constructed before the call. Not every API method will have a request object
 *       method.
 *   <li> A "callable" method. This type of method takes no parameters and returns an immutable API
 *       callable object, which can be used to initiate calls to the service.
 * </ol>
 *
 * <p>See the individual methods for example code.
 *
 * <p>Many parameters require resource names to be formatted in a particular way. To assist with
 * these names, this class includes a format method for each type of name, and additionally a parse
 * method to extract the individual identifiers contained within names that are returned.
 *
 * <p>This class can be customized by passing in a custom instance of SnapshotSettings to create().
 * For example:
 *
 * <p>To customize credentials:
 *
 * <pre>
 * <code>
 * SnapshotSettings snapshotSettings =
 *     SnapshotSettings.newBuilder()
 *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
 *         .build();
 * SnapshotClient snapshotClient =
 *     SnapshotClient.create(snapshotSettings);
 * </code>
 * </pre>
 *
 * To customize the endpoint:
 *
 * <pre>
 * <code>
 * SnapshotSettings snapshotSettings =
 *     SnapshotSettings.newBuilder().setEndpoint(myEndpoint).build();
 * SnapshotClient snapshotClient =
 *     SnapshotClient.create(snapshotSettings);
 * </code>
 * </pre>
 */
@Generated("by gapic-generator")
@BetaApi
public class SnapshotClient implements BackgroundResource {
  private final SnapshotSettings settings;
  private final SnapshotStub stub;

  /** Constructs an instance of SnapshotClient with default settings. */
  public static final SnapshotClient create() throws IOException {
    return create(SnapshotSettings.newBuilder().build());
  }

  /**
   * Constructs an instance of SnapshotClient, using the given settings. The channels are created
   * based on the settings passed in, or defaults for any settings that are not set.
   */
  public static final SnapshotClient create(SnapshotSettings settings) throws IOException {
    return new SnapshotClient(settings);
  }

  /**
   * Constructs an instance of SnapshotClient, using the given stub for making calls. This is for
   * advanced usage - prefer to use SnapshotSettings}.
   */
  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public static final SnapshotClient create(SnapshotStub stub) {
    return new SnapshotClient(stub);
  }

  /**
   * Constructs an instance of SnapshotClient, 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 SnapshotClient(SnapshotSettings settings) throws IOException {
    this.settings = settings;
    this.stub = ((SnapshotStubSettings) settings.getStubSettings()).createStub();
  }

  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  protected SnapshotClient(SnapshotStub stub) {
    this.settings = null;
    this.stub = stub;
  }

  public final SnapshotSettings getSettings() {
    return settings;
  }

  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public SnapshotStub getStub() {
    return stub;
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Deletes the specified Snapshot resource. Keep in mind that deleting a single snapshot might not
   * necessarily delete all the data on that snapshot. If any data on the snapshot that is marked
   * for deletion is needed for subsequent snapshots, the data will be moved to the next
   * corresponding snapshot.
   *
   * <p>For more information, see Deleting snaphots.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   Operation response = snapshotClient.deleteSnapshot(snapshot);
   * }
   * </code></pre>
   *
   * @param snapshot Name of the Snapshot resource to delete.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation deleteSnapshot(ProjectGlobalSnapshotName snapshot) {

    DeleteSnapshotHttpRequest request =
        DeleteSnapshotHttpRequest.newBuilder()
            .setSnapshot(snapshot == null ? null : snapshot.toString())
            .build();
    return deleteSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Deletes the specified Snapshot resource. Keep in mind that deleting a single snapshot might not
   * necessarily delete all the data on that snapshot. If any data on the snapshot that is marked
   * for deletion is needed for subsequent snapshots, the data will be moved to the next
   * corresponding snapshot.
   *
   * <p>For more information, see Deleting snaphots.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   Operation response = snapshotClient.deleteSnapshot(snapshot.toString());
   * }
   * </code></pre>
   *
   * @param snapshot Name of the Snapshot resource to delete.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation deleteSnapshot(String snapshot) {

    DeleteSnapshotHttpRequest request =
        DeleteSnapshotHttpRequest.newBuilder().setSnapshot(snapshot).build();
    return deleteSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Deletes the specified Snapshot resource. Keep in mind that deleting a single snapshot might not
   * necessarily delete all the data on that snapshot. If any data on the snapshot that is marked
   * for deletion is needed for subsequent snapshots, the data will be moved to the next
   * corresponding snapshot.
   *
   * <p>For more information, see Deleting snaphots.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   DeleteSnapshotHttpRequest request = DeleteSnapshotHttpRequest.newBuilder()
   *     .setSnapshot(snapshot.toString())
   *     .build();
   *   Operation response = snapshotClient.deleteSnapshot(request);
   * }
   * </code></pre>
   *
   * @param request The request object containing all of the parameters for the API call.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation deleteSnapshot(DeleteSnapshotHttpRequest request) {
    return deleteSnapshotCallable().call(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Deletes the specified Snapshot resource. Keep in mind that deleting a single snapshot might not
   * necessarily delete all the data on that snapshot. If any data on the snapshot that is marked
   * for deletion is needed for subsequent snapshots, the data will be moved to the next
   * corresponding snapshot.
   *
   * <p>For more information, see Deleting snaphots.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   DeleteSnapshotHttpRequest request = DeleteSnapshotHttpRequest.newBuilder()
   *     .setSnapshot(snapshot.toString())
   *     .build();
   *   ApiFuture&lt;Operation&gt; future = snapshotClient.deleteSnapshotCallable().futureCall(request);
   *   // Do something
   *   Operation response = future.get();
   * }
   * </code></pre>
   */
  @BetaApi
  public final UnaryCallable<DeleteSnapshotHttpRequest, Operation> deleteSnapshotCallable() {
    return stub.deleteSnapshotCallable();
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Returns the specified Snapshot resource. Gets a list of available snapshots by making a list()
   * request.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   Snapshot response = snapshotClient.getSnapshot(snapshot);
   * }
   * </code></pre>
   *
   * @param snapshot Name of the Snapshot resource to return.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Snapshot getSnapshot(ProjectGlobalSnapshotName snapshot) {

    GetSnapshotHttpRequest request =
        GetSnapshotHttpRequest.newBuilder()
            .setSnapshot(snapshot == null ? null : snapshot.toString())
            .build();
    return getSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Returns the specified Snapshot resource. Gets a list of available snapshots by making a list()
   * request.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   Snapshot response = snapshotClient.getSnapshot(snapshot.toString());
   * }
   * </code></pre>
   *
   * @param snapshot Name of the Snapshot resource to return.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Snapshot getSnapshot(String snapshot) {

    GetSnapshotHttpRequest request =
        GetSnapshotHttpRequest.newBuilder().setSnapshot(snapshot).build();
    return getSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Returns the specified Snapshot resource. Gets a list of available snapshots by making a list()
   * request.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   GetSnapshotHttpRequest request = GetSnapshotHttpRequest.newBuilder()
   *     .setSnapshot(snapshot.toString())
   *     .build();
   *   Snapshot response = snapshotClient.getSnapshot(request);
   * }
   * </code></pre>
   *
   * @param request The request object containing all of the parameters for the API call.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Snapshot getSnapshot(GetSnapshotHttpRequest request) {
    return getSnapshotCallable().call(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Returns the specified Snapshot resource. Gets a list of available snapshots by making a list()
   * request.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotName snapshot = ProjectGlobalSnapshotName.of("[PROJECT]", "[SNAPSHOT]");
   *   GetSnapshotHttpRequest request = GetSnapshotHttpRequest.newBuilder()
   *     .setSnapshot(snapshot.toString())
   *     .build();
   *   ApiFuture&lt;Snapshot&gt; future = snapshotClient.getSnapshotCallable().futureCall(request);
   *   // Do something
   *   Snapshot response = future.get();
   * }
   * </code></pre>
   */
  @BetaApi
  public final UnaryCallable<GetSnapshotHttpRequest, Snapshot> getSnapshotCallable() {
    return stub.getSnapshotCallable();
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Retrieves the list of Snapshot resources contained within the specified project.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectName project = ProjectName.of("[PROJECT]");
   *   for (Snapshot element : snapshotClient.listSnapshots(project).iterateAll()) {
   *     // doThingsWith(element);
   *   }
   * }
   * </code></pre>
   *
   * @param project Project ID for this request.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final ListSnapshotsPagedResponse listSnapshots(ProjectName project) {
    ListSnapshotsHttpRequest request =
        ListSnapshotsHttpRequest.newBuilder()
            .setProject(project == null ? null : project.toString())
            .build();
    return listSnapshots(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Retrieves the list of Snapshot resources contained within the specified project.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectName project = ProjectName.of("[PROJECT]");
   *   for (Snapshot element : snapshotClient.listSnapshots(project.toString()).iterateAll()) {
   *     // doThingsWith(element);
   *   }
   * }
   * </code></pre>
   *
   * @param project Project ID for this request.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final ListSnapshotsPagedResponse listSnapshots(String project) {
    ListSnapshotsHttpRequest request =
        ListSnapshotsHttpRequest.newBuilder().setProject(project).build();
    return listSnapshots(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Retrieves the list of Snapshot resources contained within the specified project.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectName project = ProjectName.of("[PROJECT]");
   *   ListSnapshotsHttpRequest request = ListSnapshotsHttpRequest.newBuilder()
   *     .setProject(project.toString())
   *     .build();
   *   for (Snapshot element : snapshotClient.listSnapshots(request).iterateAll()) {
   *     // doThingsWith(element);
   *   }
   * }
   * </code></pre>
   *
   * @param request The request object containing all of the parameters for the API call.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final ListSnapshotsPagedResponse listSnapshots(ListSnapshotsHttpRequest request) {
    return listSnapshotsPagedCallable().call(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Retrieves the list of Snapshot resources contained within the specified project.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectName project = ProjectName.of("[PROJECT]");
   *   ListSnapshotsHttpRequest request = ListSnapshotsHttpRequest.newBuilder()
   *     .setProject(project.toString())
   *     .build();
   *   ApiFuture&lt;ListSnapshotsPagedResponse&gt; future = snapshotClient.listSnapshotsPagedCallable().futureCall(request);
   *   // Do something
   *   for (Snapshot element : future.get().iterateAll()) {
   *     // doThingsWith(element);
   *   }
   * }
   * </code></pre>
   */
  @BetaApi
  public final UnaryCallable<ListSnapshotsHttpRequest, ListSnapshotsPagedResponse>
      listSnapshotsPagedCallable() {
    return stub.listSnapshotsPagedCallable();
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Retrieves the list of Snapshot resources contained within the specified project.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectName project = ProjectName.of("[PROJECT]");
   *   ListSnapshotsHttpRequest request = ListSnapshotsHttpRequest.newBuilder()
   *     .setProject(project.toString())
   *     .build();
   *   while (true) {
   *     SnapshotList response = snapshotClient.listSnapshotsCallable().call(request);
   *     for (Snapshot element : response.getItemsList()) {
   *       // doThingsWith(element);
   *     }
   *     String nextPageToken = response.getNextPageToken();
   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
   *       request = request.toBuilder().setPageToken(nextPageToken).build();
   *     } else {
   *       break;
   *     }
   *   }
   * }
   * </code></pre>
   */
  @BetaApi
  public final UnaryCallable<ListSnapshotsHttpRequest, SnapshotList> listSnapshotsCallable() {
    return stub.listSnapshotsCallable();
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Sets the labels on a snapshot. To learn more about labels, read the Labeling Resources
   * documentation.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotResourceName resource = ProjectGlobalSnapshotResourceName.of("[PROJECT]", "[RESOURCE]");
   *   GlobalSetLabelsRequest globalSetLabelsRequestResource = GlobalSetLabelsRequest.newBuilder().build();
   *   Operation response = snapshotClient.setLabelsSnapshot(resource, globalSetLabelsRequestResource);
   * }
   * </code></pre>
   *
   * @param resource Name of the resource for this request.
   * @param globalSetLabelsRequestResource
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation setLabelsSnapshot(
      ProjectGlobalSnapshotResourceName resource,
      GlobalSetLabelsRequest globalSetLabelsRequestResource) {

    SetLabelsSnapshotHttpRequest request =
        SetLabelsSnapshotHttpRequest.newBuilder()
            .setResource(resource == null ? null : resource.toString())
            .setGlobalSetLabelsRequestResource(globalSetLabelsRequestResource)
            .build();
    return setLabelsSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Sets the labels on a snapshot. To learn more about labels, read the Labeling Resources
   * documentation.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotResourceName resource = ProjectGlobalSnapshotResourceName.of("[PROJECT]", "[RESOURCE]");
   *   GlobalSetLabelsRequest globalSetLabelsRequestResource = GlobalSetLabelsRequest.newBuilder().build();
   *   Operation response = snapshotClient.setLabelsSnapshot(resource.toString(), globalSetLabelsRequestResource);
   * }
   * </code></pre>
   *
   * @param resource Name of the resource for this request.
   * @param globalSetLabelsRequestResource
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation setLabelsSnapshot(
      String resource, GlobalSetLabelsRequest globalSetLabelsRequestResource) {

    SetLabelsSnapshotHttpRequest request =
        SetLabelsSnapshotHttpRequest.newBuilder()
            .setResource(resource)
            .setGlobalSetLabelsRequestResource(globalSetLabelsRequestResource)
            .build();
    return setLabelsSnapshot(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Sets the labels on a snapshot. To learn more about labels, read the Labeling Resources
   * documentation.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotResourceName resource = ProjectGlobalSnapshotResourceName.of("[PROJECT]", "[RESOURCE]");
   *   GlobalSetLabelsRequest globalSetLabelsRequestResource = GlobalSetLabelsRequest.newBuilder().build();
   *   SetLabelsSnapshotHttpRequest request = SetLabelsSnapshotHttpRequest.newBuilder()
   *     .setResource(resource.toString())
   *     .setGlobalSetLabelsRequestResource(globalSetLabelsRequestResource)
   *     .build();
   *   Operation response = snapshotClient.setLabelsSnapshot(request);
   * }
   * </code></pre>
   *
   * @param request The request object containing all of the parameters for the API call.
   * @throws com.google.api.gax.rpc.ApiException if the remote call fails
   */
  @BetaApi
  public final Operation setLabelsSnapshot(SetLabelsSnapshotHttpRequest request) {
    return setLabelsSnapshotCallable().call(request);
  }

  // AUTO-GENERATED DOCUMENTATION AND METHOD
  /**
   * Sets the labels on a snapshot. To learn more about labels, read the Labeling Resources
   * documentation.
   *
   * <p>Sample code:
   *
   * <pre><code>
   * try (SnapshotClient snapshotClient = SnapshotClient.create()) {
   *   ProjectGlobalSnapshotResourceName resource = ProjectGlobalSnapshotResourceName.of("[PROJECT]", "[RESOURCE]");
   *   GlobalSetLabelsRequest globalSetLabelsRequestResource = GlobalSetLabelsRequest.newBuilder().build();
   *   SetLabelsSnapshotHttpRequest request = SetLabelsSnapshotHttpRequest.newBuilder()
   *     .setResource(resource.toString())
   *     .setGlobalSetLabelsRequestResource(globalSetLabelsRequestResource)
   *     .build();
   *   ApiFuture&lt;Operation&gt; future = snapshotClient.setLabelsSnapshotCallable().futureCall(request);
   *   // Do something
   *   Operation response = future.get();
   * }
   * </code></pre>
   */
  @BetaApi
  public final UnaryCallable<SetLabelsSnapshotHttpRequest, Operation> setLabelsSnapshotCallable() {
    return stub.setLabelsSnapshotCallable();
  }

  @Override
  public final void close() {
    stub.close();
  }

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

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

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

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

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

  public static class ListSnapshotsPagedResponse
      extends AbstractPagedListResponse<
          ListSnapshotsHttpRequest, SnapshotList, Snapshot, ListSnapshotsPage,
          ListSnapshotsFixedSizeCollection> {

    public static ApiFuture<ListSnapshotsPagedResponse> createAsync(
        PageContext<ListSnapshotsHttpRequest, SnapshotList, Snapshot> context,
        ApiFuture<SnapshotList> futureResponse) {
      ApiFuture<ListSnapshotsPage> futurePage =
          ListSnapshotsPage.createEmptyPage().createPageAsync(context, futureResponse);
      return ApiFutures.transform(
          futurePage,
          new ApiFunction<ListSnapshotsPage, ListSnapshotsPagedResponse>() {
            @Override
            public ListSnapshotsPagedResponse apply(ListSnapshotsPage input) {
              return new ListSnapshotsPagedResponse(input);
            }
          });
    }

    private ListSnapshotsPagedResponse(ListSnapshotsPage page) {
      super(page, ListSnapshotsFixedSizeCollection.createEmptyCollection());
    }
  }

  public static class ListSnapshotsPage
      extends AbstractPage<ListSnapshotsHttpRequest, SnapshotList, Snapshot, ListSnapshotsPage> {

    private ListSnapshotsPage(
        PageContext<ListSnapshotsHttpRequest, SnapshotList, Snapshot> context,
        SnapshotList response) {
      super(context, response);
    }

    private static ListSnapshotsPage createEmptyPage() {
      return new ListSnapshotsPage(null, null);
    }

    @Override
    protected ListSnapshotsPage createPage(
        PageContext<ListSnapshotsHttpRequest, SnapshotList, Snapshot> context,
        SnapshotList response) {
      return new ListSnapshotsPage(context, response);
    }

    @Override
    public ApiFuture<ListSnapshotsPage> createPageAsync(
        PageContext<ListSnapshotsHttpRequest, SnapshotList, Snapshot> context,
        ApiFuture<SnapshotList> futureResponse) {
      return super.createPageAsync(context, futureResponse);
    }
  }

  public static class ListSnapshotsFixedSizeCollection
      extends AbstractFixedSizeCollection<
          ListSnapshotsHttpRequest, SnapshotList, Snapshot, ListSnapshotsPage,
          ListSnapshotsFixedSizeCollection> {

    private ListSnapshotsFixedSizeCollection(List<ListSnapshotsPage> pages, int collectionSize) {
      super(pages, collectionSize);
    }

    private static ListSnapshotsFixedSizeCollection createEmptyCollection() {
      return new ListSnapshotsFixedSizeCollection(null, 0);
    }

    @Override
    protected ListSnapshotsFixedSizeCollection createCollection(
        List<ListSnapshotsPage> pages, int collectionSize) {
      return new ListSnapshotsFixedSizeCollection(pages, collectionSize);
    }
  }
}
