| // Copyright (C) 2013 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.ericsson.gerrit.plugins.heartbeat; |
| |
| import com.google.common.flogger.FluentLogger; |
| import com.google.gerrit.extensions.events.LifecycleListener; |
| import com.google.gerrit.extensions.registration.DynamicItem; |
| import com.google.gerrit.server.events.EventDispatcher; |
| import com.google.gerrit.server.permissions.PermissionBackendException; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| /** Timer-based daemon doing the actual heartbeat task. */ |
| @Singleton |
| public class HeartbeatDaemon implements LifecycleListener { |
| |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| private static final String HEARTBEAT_THREAD_NAME = "StreamEventHeartbeat"; |
| private final DynamicItem<EventDispatcher> dispatcher; |
| private final HeartbeatConfig config; |
| private final Timer timer; |
| |
| /** |
| * Constructor that sets the heartbeat timer. |
| * |
| * @param dispatcher the event dispatcher |
| * @param config the plugin config |
| */ |
| @Inject |
| public HeartbeatDaemon(DynamicItem<EventDispatcher> dispatcher, HeartbeatConfig config) { |
| this.dispatcher = dispatcher; |
| this.config = config; |
| timer = new Timer(HEARTBEAT_THREAD_NAME, true); |
| } |
| |
| @Override |
| public void start() { |
| timer.schedule(new HeartbeatTask(), 0, config.getDelay()); |
| logger.atInfo().log( |
| "Initialized to send heartbeat event every %d milliseconds", config.getDelay()); |
| } |
| |
| @Override |
| public void stop() { |
| timer.cancel(); |
| logger.atInfo().log("Stopped sending heartbeat event"); |
| } |
| |
| private class HeartbeatTask extends TimerTask { |
| @Override |
| public void run() { |
| try { |
| dispatcher.get().postEvent(new HeartbeatEvent()); |
| } catch (PermissionBackendException e) { |
| logger.atSevere().withCause(e).log("Failed to post heartbeat event"); |
| } |
| } |
| } |
| } |