| // Copyright (C) 2017 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.gcconductor.executor; |
| |
| import com.ericsson.gerrit.plugins.gcconductor.ShutdownNotifier; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Singleton |
| class RuntimeShutdown { |
| private static final Logger log = LoggerFactory.getLogger(RuntimeShutdown.class); |
| |
| private final ShutdownHook hook; |
| private final ShutdownNotifier shutdownNotifier; |
| |
| @Inject |
| RuntimeShutdown(ShutdownNotifier shutdownNotifier) { |
| this.shutdownNotifier = shutdownNotifier; |
| hook = new ShutdownHook(); |
| Runtime.getRuntime().addShutdownHook(hook); |
| } |
| |
| public void waitFor() { |
| hook.waitForShutdown(); |
| } |
| |
| private class ShutdownHook extends Thread { |
| private boolean completed; |
| |
| ShutdownHook() { |
| setName("ShutdownCallback"); |
| } |
| |
| @Override |
| public void run() { |
| log.debug("Graceful shutdown requested"); |
| shutdownNotifier.notifyAllListeners(); |
| log.debug("Shutdown complete"); |
| synchronized (this) { |
| completed = true; |
| notifyAll(); |
| } |
| } |
| |
| void waitForShutdown() { |
| synchronized (this) { |
| while (!completed) { |
| try { |
| wait(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| return; |
| } |
| } |
| } |
| } |
| } |
| } |