| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.storm; |
| import org.apache.storm.daemon.Shutdownable; |
| import org.apache.storm.utils.Utils; |
| |
| import java.util.Collection; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * In local mode, {@code ProcessSimulator} keeps track of Shutdownable objects |
| * in place of actual processes (in cluster mode). |
| */ |
| public class ProcessSimulator { |
| private static Logger LOG = LoggerFactory.getLogger(ProcessSimulator.class); |
| private static Object lock = new Object(); |
| protected static ConcurrentHashMap<String, Shutdownable> processMap = new ConcurrentHashMap<String, Shutdownable>(); |
| |
| /** |
| * Register a process' handle |
| * |
| * @param pid |
| * @param shutdownable |
| */ |
| public static void registerProcess(String pid, Shutdownable shutdownable) { |
| processMap.put(pid, shutdownable); |
| } |
| |
| /** |
| * Get all process handles |
| * |
| * @return |
| */ |
| public static Collection<Shutdownable> getAllProcessHandles() { |
| return processMap.values(); |
| } |
| |
| /** |
| * Kill a process |
| * |
| * @param pid |
| */ |
| public static void killProcess(String pid) { |
| synchronized (lock) { |
| LOG.info("Begin killing process " + pid); |
| Shutdownable shutdownHandle = processMap.get(pid); |
| if (shutdownHandle != null) { |
| shutdownHandle.shutdown(); |
| } |
| processMap.remove(pid); |
| LOG.info("Successfully killed process " + pid); |
| } |
| } |
| |
| /** |
| * Kill all processes |
| */ |
| public static void killAllProcesses() { |
| Set<String> pids = processMap.keySet(); |
| for (String pid : pids) { |
| try { |
| killProcess(pid); |
| } catch (Exception e) { |
| if (Utils.exceptionCauseIsInstanceOf(InterruptedException.class, e)) { |
| LOG.warn("process {} not killed (Ignoring InterruptedException)", pid, e); |
| } else if (e instanceof RuntimeException){ |
| throw e; |
| } else { |
| //TODO once everything is in java this should not be possible any more |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |
| } |