| // Copyright (C) 2019 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.multisite.kafka; |
| |
| import com.google.gerrit.extensions.events.LifecycleListener; |
| import com.google.gerrit.server.events.Event; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.googlesource.gerrit.plugins.multisite.broker.BrokerApi; |
| import com.googlesource.gerrit.plugins.multisite.broker.kafka.BrokerPublisher; |
| import com.googlesource.gerrit.plugins.multisite.consumer.SourceAwareEventWrapper; |
| import com.googlesource.gerrit.plugins.multisite.forwarder.events.EventTopic; |
| import com.googlesource.gerrit.plugins.multisite.kafka.consumer.KafkaEventSubscriber; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| public class KafkaBrokerApi implements BrokerApi, LifecycleListener { |
| |
| private final BrokerPublisher publisher; |
| private final Provider<KafkaEventSubscriber> subscriberProvider; |
| private List<KafkaEventSubscriber> subscribers; |
| |
| @Inject |
| public KafkaBrokerApi( |
| BrokerPublisher publisher, Provider<KafkaEventSubscriber> subscriberProvider) { |
| this.publisher = publisher; |
| this.subscriberProvider = subscriberProvider; |
| subscribers = new ArrayList<>(); |
| } |
| |
| @Override |
| public boolean send(String topic, Event event) { |
| return publisher.publish(topic, event); |
| } |
| |
| @Override |
| public void receiveAync(String topic, Consumer<SourceAwareEventWrapper> eventConsumer) { |
| KafkaEventSubscriber subscriber = subscriberProvider.get(); |
| synchronized (subscribers) { |
| subscribers.add(subscriber); |
| } |
| subscriber.subscribe(EventTopic.of(topic), eventConsumer); |
| } |
| |
| @Override |
| public void start() {} |
| |
| @Override |
| public void stop() { |
| for (KafkaEventSubscriber subscriber : subscribers) { |
| subscriber.shutdown(); |
| } |
| } |
| } |