| // 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.kafka.api; |
| |
| import com.gerritforge.gerrit.eventbroker.BrokerApi; |
| import com.gerritforge.gerrit.eventbroker.EventMessage; |
| import com.gerritforge.gerrit.eventbroker.TopicSubscriber; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.googlesource.gerrit.plugins.kafka.publish.KafkaPublisher; |
| import com.googlesource.gerrit.plugins.kafka.subscribe.KafkaEventSubscriber; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.function.Consumer; |
| import java.util.stream.Collectors; |
| |
| public class KafkaBrokerApi implements BrokerApi { |
| |
| private final KafkaPublisher publisher; |
| private final Provider<KafkaEventSubscriber> subscriberProvider; |
| private List<KafkaEventSubscriber> subscribers; |
| |
| @Inject |
| public KafkaBrokerApi( |
| KafkaPublisher publisher, Provider<KafkaEventSubscriber> subscriberProvider) { |
| this.publisher = publisher; |
| this.subscriberProvider = subscriberProvider; |
| subscribers = new ArrayList<>(); |
| } |
| |
| @Override |
| public boolean send(String topic, EventMessage event) { |
| return publisher.publish(topic, event); |
| } |
| |
| @Override |
| public void receiveAsync(String topic, Consumer<EventMessage> eventConsumer) { |
| KafkaEventSubscriber subscriber = subscriberProvider.get(); |
| synchronized (subscribers) { |
| subscribers.add(subscriber); |
| } |
| subscriber.subscribe(topic, eventConsumer); |
| } |
| |
| @Override |
| public void disconnect() { |
| for (KafkaEventSubscriber subscriber : subscribers) { |
| subscriber.shutdown(); |
| } |
| subscribers.clear(); |
| } |
| |
| @Override |
| public Set<TopicSubscriber> topicSubscribers() { |
| return subscribers.stream() |
| .map(s -> TopicSubscriber.topicSubscriber(s.getTopic(), s.getMessageProcessor())) |
| .collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public void replayAllEvents(String topic) { |
| subscribers.stream() |
| .filter(subscriber -> topic.equals(subscriber.getTopic())) |
| .forEach(subscriber -> subscriber.resetOffset()); |
| } |
| } |