/
CursorServiceClient.java
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/
CursorServiceClient.java
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/*
* Copyright 2020 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.pubsublite.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.BidiStreamingCallable;
import com.google.api.gax.rpc.PageContext;
import com.google.api.gax.rpc.UnaryCallable;
import com.google.cloud.pubsublite.proto.CommitCursorRequest;
import com.google.cloud.pubsublite.proto.CommitCursorResponse;
import com.google.cloud.pubsublite.proto.ListPartitionCursorsRequest;
import com.google.cloud.pubsublite.proto.ListPartitionCursorsResponse;
import com.google.cloud.pubsublite.proto.PartitionCursor;
import com.google.cloud.pubsublite.proto.StreamingCommitCursorRequest;
import com.google.cloud.pubsublite.proto.StreamingCommitCursorResponse;
import com.google.cloud.pubsublite.proto.SubscriptionName;
import com.google.cloud.pubsublite.v1.stub.CursorServiceStub;
import com.google.cloud.pubsublite.v1.stub.CursorServiceStubSettings;
import com.google.common.util.concurrent.MoreExecutors;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.annotation.Generated;
// AUTO-GENERATED DOCUMENTATION AND CLASS.
/**
* Service Description: The service that a subscriber client application uses to manage committed
* cursors while receiving messsages. A cursor represents a subscriber's progress within a topic
* partition for a given subscription.
*
* <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 (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* CommitCursorRequest request =
* CommitCursorRequest.newBuilder()
* .setSubscription("subscription341203229")
* .setPartition(-1799810326)
* .setCursor(Cursor.newBuilder().build())
* .build();
* CommitCursorResponse response = cursorServiceClient.commitCursor(request);
* }
* }</pre>
*
* <p>Note: close() needs to be called on the CursorServiceClient 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 CursorServiceSettings to
* create(). For example:
*
* <p>To customize credentials:
*
* <pre>{@code
* CursorServiceSettings cursorServiceSettings =
* CursorServiceSettings.newBuilder()
* .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
* .build();
* CursorServiceClient cursorServiceClient = CursorServiceClient.create(cursorServiceSettings);
* }</pre>
*
* <p>To customize the endpoint:
*
* <pre>{@code
* CursorServiceSettings cursorServiceSettings =
* CursorServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
* CursorServiceClient cursorServiceClient = CursorServiceClient.create(cursorServiceSettings);
* }</pre>
*
* <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
*/
@Generated("by gapic-generator-java")
public class CursorServiceClient implements BackgroundResource {
private final CursorServiceSettings settings;
private final CursorServiceStub stub;
/** Constructs an instance of CursorServiceClient with default settings. */
public static final CursorServiceClient create() throws IOException {
return create(CursorServiceSettings.newBuilder().build());
}
/**
* Constructs an instance of CursorServiceClient, 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 CursorServiceClient create(CursorServiceSettings settings)
throws IOException {
return new CursorServiceClient(settings);
}
/**
* Constructs an instance of CursorServiceClient, using the given stub for making calls. This is
* for advanced usage - prefer using create(CursorServiceSettings).
*/
@BetaApi("A restructuring of stub classes is planned, so this may break in the future")
public static final CursorServiceClient create(CursorServiceStub stub) {
return new CursorServiceClient(stub);
}
/**
* Constructs an instance of CursorServiceClient, 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 CursorServiceClient(CursorServiceSettings settings) throws IOException {
this.settings = settings;
this.stub = ((CursorServiceStubSettings) settings.getStubSettings()).createStub();
}
@BetaApi("A restructuring of stub classes is planned, so this may break in the future")
protected CursorServiceClient(CursorServiceStub stub) {
this.settings = null;
this.stub = stub;
}
public final CursorServiceSettings getSettings() {
return settings;
}
@BetaApi("A restructuring of stub classes is planned, so this may break in the future")
public CursorServiceStub getStub() {
return stub;
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Establishes a stream with the server for managing committed cursors.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* BidiStream<StreamingCommitCursorRequest, StreamingCommitCursorResponse> bidiStream =
* cursorServiceClient.streamingCommitCursorCallable().call();
* StreamingCommitCursorRequest request = StreamingCommitCursorRequest.newBuilder().build();
* bidiStream.send(request);
* for (StreamingCommitCursorResponse response : bidiStream) {
* // Do something when a response is received.
* }
* }
* }</pre>
*/
public final BidiStreamingCallable<StreamingCommitCursorRequest, StreamingCommitCursorResponse>
streamingCommitCursorCallable() {
return stub.streamingCommitCursorCallable();
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Updates the committed cursor.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* CommitCursorRequest request =
* CommitCursorRequest.newBuilder()
* .setSubscription("subscription341203229")
* .setPartition(-1799810326)
* .setCursor(Cursor.newBuilder().build())
* .build();
* CommitCursorResponse response = cursorServiceClient.commitCursor(request);
* }
* }</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
*/
public final CommitCursorResponse commitCursor(CommitCursorRequest request) {
return commitCursorCallable().call(request);
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Updates the committed cursor.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* CommitCursorRequest request =
* CommitCursorRequest.newBuilder()
* .setSubscription("subscription341203229")
* .setPartition(-1799810326)
* .setCursor(Cursor.newBuilder().build())
* .build();
* ApiFuture<CommitCursorResponse> future =
* cursorServiceClient.commitCursorCallable().futureCall(request);
* // Do something.
* CommitCursorResponse response = future.get();
* }
* }</pre>
*/
public final UnaryCallable<CommitCursorRequest, CommitCursorResponse> commitCursorCallable() {
return stub.commitCursorCallable();
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Returns all committed cursor information for a subscription.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* SubscriptionName parent = SubscriptionName.of("[PROJECT]", "[LOCATION]", "[SUBSCRIPTION]");
* for (PartitionCursor element :
* cursorServiceClient.listPartitionCursors(parent).iterateAll()) {
* // doThingsWith(element);
* }
* }
* }</pre>
*
* @param parent Required. The subscription for which to retrieve cursors. Structured like
* `projects/{project_number}/locations/{location}/subscriptions/{subscription_id}`.
* @throws com.google.api.gax.rpc.ApiException if the remote call fails
*/
public final ListPartitionCursorsPagedResponse listPartitionCursors(SubscriptionName parent) {
ListPartitionCursorsRequest request =
ListPartitionCursorsRequest.newBuilder()
.setParent(parent == null ? null : parent.toString())
.build();
return listPartitionCursors(request);
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Returns all committed cursor information for a subscription.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* String parent = SubscriptionName.of("[PROJECT]", "[LOCATION]", "[SUBSCRIPTION]").toString();
* for (PartitionCursor element :
* cursorServiceClient.listPartitionCursors(parent).iterateAll()) {
* // doThingsWith(element);
* }
* }
* }</pre>
*
* @param parent Required. The subscription for which to retrieve cursors. Structured like
* `projects/{project_number}/locations/{location}/subscriptions/{subscription_id}`.
* @throws com.google.api.gax.rpc.ApiException if the remote call fails
*/
public final ListPartitionCursorsPagedResponse listPartitionCursors(String parent) {
ListPartitionCursorsRequest request =
ListPartitionCursorsRequest.newBuilder().setParent(parent).build();
return listPartitionCursors(request);
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Returns all committed cursor information for a subscription.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* ListPartitionCursorsRequest request =
* ListPartitionCursorsRequest.newBuilder()
* .setParent(
* SubscriptionName.of("[PROJECT]", "[LOCATION]", "[SUBSCRIPTION]").toString())
* .setPageSize(883849137)
* .setPageToken("pageToken873572522")
* .build();
* for (PartitionCursor element :
* cursorServiceClient.listPartitionCursors(request).iterateAll()) {
* // doThingsWith(element);
* }
* }
* }</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
*/
public final ListPartitionCursorsPagedResponse listPartitionCursors(
ListPartitionCursorsRequest request) {
return listPartitionCursorsPagedCallable().call(request);
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Returns all committed cursor information for a subscription.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* ListPartitionCursorsRequest request =
* ListPartitionCursorsRequest.newBuilder()
* .setParent(
* SubscriptionName.of("[PROJECT]", "[LOCATION]", "[SUBSCRIPTION]").toString())
* .setPageSize(883849137)
* .setPageToken("pageToken873572522")
* .build();
* ApiFuture<PartitionCursor> future =
* cursorServiceClient.listPartitionCursorsPagedCallable().futureCall(request);
* // Do something.
* for (PartitionCursor element : future.get().iterateAll()) {
* // doThingsWith(element);
* }
* }
* }</pre>
*/
public final UnaryCallable<ListPartitionCursorsRequest, ListPartitionCursorsPagedResponse>
listPartitionCursorsPagedCallable() {
return stub.listPartitionCursorsPagedCallable();
}
// AUTO-GENERATED DOCUMENTATION AND METHOD.
/**
* Returns all committed cursor information for a subscription.
*
* <p>Sample code:
*
* <pre>{@code
* try (CursorServiceClient cursorServiceClient = CursorServiceClient.create()) {
* while (true) {
* ListPartitionCursorsResponse response =
* cursorServiceClient.listPartitionCursorsCallable().call(request);
* for (PartitionCursor element : response.getResponsesList()) {
* // doThingsWith(element);
* }
* String nextPageToken = response.getNextPageToken();
* if (!Strings.isNullOrEmpty(nextPageToken)) {
* request = request.toBuilder().setPageToken(nextPageToken).build();
* } else {
* break;
* }
* }
* }
* }</pre>
*/
public final UnaryCallable<ListPartitionCursorsRequest, ListPartitionCursorsResponse>
listPartitionCursorsCallable() {
return stub.listPartitionCursorsCallable();
}
@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 ListPartitionCursorsPagedResponse
extends AbstractPagedListResponse<
ListPartitionCursorsRequest,
ListPartitionCursorsResponse,
PartitionCursor,
ListPartitionCursorsPage,
ListPartitionCursorsFixedSizeCollection> {
public static ApiFuture<ListPartitionCursorsPagedResponse> createAsync(
PageContext<ListPartitionCursorsRequest, ListPartitionCursorsResponse, PartitionCursor>
context,
ApiFuture<ListPartitionCursorsResponse> futureResponse) {
ApiFuture<ListPartitionCursorsPage> futurePage =
ListPartitionCursorsPage.createEmptyPage().createPageAsync(context, futureResponse);
return ApiFutures.transform(
futurePage,
new ApiFunction<ListPartitionCursorsPage, ListPartitionCursorsPagedResponse>() {
@Override
public ListPartitionCursorsPagedResponse apply(ListPartitionCursorsPage input) {
return new ListPartitionCursorsPagedResponse(input);
}
},
MoreExecutors.directExecutor());
}
private ListPartitionCursorsPagedResponse(ListPartitionCursorsPage page) {
super(page, ListPartitionCursorsFixedSizeCollection.createEmptyCollection());
}
}
public static class ListPartitionCursorsPage
extends AbstractPage<
ListPartitionCursorsRequest,
ListPartitionCursorsResponse,
PartitionCursor,
ListPartitionCursorsPage> {
private ListPartitionCursorsPage(
PageContext<ListPartitionCursorsRequest, ListPartitionCursorsResponse, PartitionCursor>
context,
ListPartitionCursorsResponse response) {
super(context, response);
}
private static ListPartitionCursorsPage createEmptyPage() {
return new ListPartitionCursorsPage(null, null);
}
@Override
protected ListPartitionCursorsPage createPage(
PageContext<ListPartitionCursorsRequest, ListPartitionCursorsResponse, PartitionCursor>
context,
ListPartitionCursorsResponse response) {
return new ListPartitionCursorsPage(context, response);
}
@Override
public ApiFuture<ListPartitionCursorsPage> createPageAsync(
PageContext<ListPartitionCursorsRequest, ListPartitionCursorsResponse, PartitionCursor>
context,
ApiFuture<ListPartitionCursorsResponse> futureResponse) {
return super.createPageAsync(context, futureResponse);
}
}
public static class ListPartitionCursorsFixedSizeCollection
extends AbstractFixedSizeCollection<
ListPartitionCursorsRequest,
ListPartitionCursorsResponse,
PartitionCursor,
ListPartitionCursorsPage,
ListPartitionCursorsFixedSizeCollection> {
private ListPartitionCursorsFixedSizeCollection(
List<ListPartitionCursorsPage> pages, int collectionSize) {
super(pages, collectionSize);
}
private static ListPartitionCursorsFixedSizeCollection createEmptyCollection() {
return new ListPartitionCursorsFixedSizeCollection(null, 0);
}
@Override
protected ListPartitionCursorsFixedSizeCollection createCollection(
List<ListPartitionCursorsPage> pages, int collectionSize) {
return new ListPartitionCursorsFixedSizeCollection(pages, collectionSize);
}
}
}