| // Copyright (C) 2016 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.publish; |
| |
| import com.gerritforge.gerrit.eventbroker.EventMessage; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.gerrit.server.events.Event; |
| import com.google.gerrit.server.events.EventListener; |
| import com.google.gson.Gson; |
| import com.google.gson.JsonObject; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.googlesource.gerrit.plugins.kafka.session.KafkaSession; |
| |
| @Singleton |
| public class KafkaPublisher implements EventListener { |
| |
| private final KafkaSession session; |
| private final Gson gson; |
| |
| @Inject |
| public KafkaPublisher(KafkaSession kafkaSession, Gson gson) { |
| this.session = kafkaSession; |
| this.gson = gson; |
| } |
| |
| public void start() { |
| if (!session.isOpen()) { |
| session.connect(); |
| } |
| } |
| |
| public void stop() { |
| session.disconnect(); |
| } |
| |
| @Override |
| public void onEvent(Event event) { |
| if (session.isOpen()) { |
| session.publish(gson.toJson(event)); |
| } |
| } |
| |
| public ListenableFuture<Boolean> publish(String topic, EventMessage event) { |
| return session.publish(topic, getPayload(event)); |
| } |
| |
| private String getPayload(EventMessage event) { |
| return gson.toJson(event); |
| } |
| |
| @VisibleForTesting |
| public JsonObject eventToJson(Event event) { |
| return gson.toJsonTree(event).getAsJsonObject(); |
| } |
| } |