| // Copyright (C) 2021 The Android Open Source Project |
| // |
| // 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 |
| // |
| // http://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.googlesource.gerrit.plugins.pubsub; |
| |
| import com.gerritforge.gerrit.eventbroker.EventMessage; |
| import com.google.api.core.ApiFuture; |
| import com.google.api.core.ApiFutureCallback; |
| import com.google.api.core.ApiFutures; |
| import com.google.cloud.pubsub.v1.Publisher; |
| import com.google.common.flogger.FluentLogger; |
| import com.google.common.util.concurrent.MoreExecutors; |
| import com.google.gerrit.server.events.Event; |
| import com.google.gson.Gson; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| import com.google.protobuf.ByteString; |
| import com.google.pubsub.v1.PubsubMessage; |
| import java.io.IOException; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| public class PubSubPublisher { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| public interface Factory { |
| public PubSubPublisher create(String topic); |
| } |
| |
| private final Gson gson; |
| private final PubSubPublisherMetrics publisherMetrics; |
| private final String topic; |
| private final Publisher publisher; |
| private final PubSubConfiguration pubSubProperties; |
| |
| @Inject |
| public PubSubPublisher( |
| PubSubConfiguration pubSubProperties, |
| PublisherProvider publisherProvider, |
| Gson gson, |
| PubSubPublisherMetrics publisherMetrics, |
| @Assisted String topic) |
| throws IOException { |
| this.gson = gson; |
| this.publisherMetrics = publisherMetrics; |
| this.topic = topic; |
| this.publisher = publisherProvider.get(topic); |
| this.pubSubProperties = pubSubProperties; |
| } |
| |
| public boolean publish(Event event) { |
| return publish(gson.toJson(event)); |
| } |
| |
| public boolean publish(EventMessage event) { |
| return publish(gson.toJson(event)); |
| } |
| |
| private boolean publish(String eventPayload) { |
| ByteString data = ByteString.copyFromUtf8(eventPayload); |
| PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build(); |
| if (pubSubProperties.isSendAsync()) { |
| return publishAsync(pubsubMessage) != null; |
| } |
| |
| publishSync(pubsubMessage); |
| return true; |
| } |
| |
| private ApiFuture<String> publishAsync(PubsubMessage pubsubMessage) { |
| ApiFuture<String> publish = publisher.publish(pubsubMessage); |
| ApiFutures.addCallback( |
| publish, |
| new ApiFutureCallback<String>() { |
| @Override |
| public void onFailure(Throwable t) { |
| logger.atSevere().withCause(t).log( |
| "Exception when publishing message (id:%s) to topic '%s' [message: %s]", |
| pubsubMessage.getMessageId(), topic, pubsubMessage.getData().toStringUtf8()); |
| publisherMetrics.incrementFailedToPublishMessage(); |
| } |
| |
| @Override |
| public void onSuccess(String messageId) { |
| logger.atFine().log( |
| "Successfully published message (id:%s) to topic '%s' [message: %s]", |
| messageId, topic, pubsubMessage.getData().toStringUtf8()); |
| |
| publisherMetrics.incrementSucceedToPublishMessage(); |
| } |
| }, |
| MoreExecutors.directExecutor()); |
| return publish; |
| } |
| |
| private void publishSync(PubsubMessage pubsubMessage) { |
| try { |
| ApiFuture<String> messageIdFuture = publishAsync(pubsubMessage); |
| messageIdFuture.get(1000, TimeUnit.SECONDS); |
| |
| } catch (InterruptedException | ExecutionException | TimeoutException e) { |
| logger.atSevere().withCause(e).log("Cannot send the message"); |
| } |
| } |
| |
| public void close() throws InterruptedException { |
| if (publisher != null) { |
| publisher.shutdown(); |
| publisher.awaitTermination(1, TimeUnit.MINUTES); |
| } |
| } |
| } |