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https://github.com/google/nomulus.git
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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
81 lines
2.9 KiB
Java
81 lines
2.9 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.util;
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import static java.util.Arrays.asList;
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import com.google.appengine.api.taskqueue.Queue;
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import com.google.appengine.api.taskqueue.TaskHandle;
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import com.google.appengine.api.taskqueue.TaskOptions;
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import com.google.appengine.api.taskqueue.TransientFailureException;
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import java.io.Serializable;
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import java.util.List;
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import java.util.concurrent.Callable;
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import javax.inject.Inject;
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/** Utilities for dealing with App Engine task queues. */
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public class TaskEnqueuer implements Serializable {
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private static final long serialVersionUID = 7893211200220508362L;
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private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
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private final Retrier retrier;
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@Inject
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public TaskEnqueuer(Retrier retrier) {
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this.retrier = retrier;
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}
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/**
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* Adds a task to a App Engine task queue in a reliable manner.
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*
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* <p>This is the same as {@link Queue#add(TaskOptions)} except it'll automatically retry with
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* exponential backoff if {@link TransientFailureException} is thrown.
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*
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* @throws TransientFailureException if retrying failed for the maximum period of time, or an
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* {@link InterruptedException} told us to stop trying
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* @return successfully enqueued task
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*/
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public TaskHandle enqueue(Queue queue, TaskOptions task) {
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return enqueue(queue, asList(task)).get(0);
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}
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/**
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* Adds tasks to an App Engine task queue in a reliable manner.
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*
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* <p>This is the same as {@link Queue#add(Iterable)} except it'll automatically retry with
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* exponential backoff if {@link TransientFailureException} is thrown.
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*
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* @throws TransientFailureException if retrying failed for the maximum period of time, or an
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* {@link InterruptedException} told us to stop trying
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* @return successfully enqueued tasks
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*/
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public List<TaskHandle> enqueue(final Queue queue, final Iterable<TaskOptions> tasks) {
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return retrier.callWithRetry(
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new Callable<List<TaskHandle>>() {
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@Override
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public List<TaskHandle> call() {
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for (TaskOptions task : tasks) {
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logger.infofmt(
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"Enqueuing queue='%s' endpoint='%s'", queue.getQueueName(), task.getUrl());
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}
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return queue.add(tasks);
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}},
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TransientFailureException.class);
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}
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}
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