| /* |
| * 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.hadoop.chukwa.inputtools.mdl; |
| |
| |
| import java.io.*; |
| import java.lang.management.ManagementFactory; |
| import java.nio.charset.Charset; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| public class LoaderServer { |
| |
| String name; |
| private static Log log = LogFactory.getLog(LoaderServer.class); |
| private FileOutputStream pidFileOutput = null; |
| |
| public LoaderServer(String name) { |
| this.name = name; |
| } |
| |
| public void init() throws IOException { |
| String pidLong = ManagementFactory.getRuntimeMXBean().getName(); |
| String[] items = pidLong.split("@"); |
| String pid = items[0]; |
| String chukwaPath = System.getProperty("CHUKWA_HOME"); |
| StringBuffer pidFilesb = new StringBuffer(); |
| pidFilesb.append(chukwaPath).append("/var/run/").append(name) |
| .append(".pid"); |
| try { |
| File pidFile = new File(pidFilesb.toString()); |
| pidFileOutput = new FileOutputStream(pidFile); |
| pidFileOutput.write(pid.getBytes(Charset.forName("UTF-8"))); |
| pidFileOutput.flush(); |
| } catch (IOException ex) { |
| System.out.println("Initializaiton failed: can not write pid file."); |
| log.error("Initialization failed..."); |
| log.error(ex.getMessage()); |
| throw ex; |
| } |
| |
| } |
| |
| public void clean() { |
| String chukwaPath = System.getenv("CHUKWA_HOME"); |
| StringBuffer pidFilesb = new StringBuffer(); |
| pidFilesb.append(chukwaPath).append("/var/run/").append(name) |
| .append(".pid"); |
| String pidFileName = pidFilesb.toString(); |
| |
| File pidFile = new File(pidFileName); |
| if (!pidFile.exists()) { |
| log.error("Delete pid file, No such file or directory: " + pidFileName); |
| } else { |
| try { |
| pidFileOutput.close(); |
| } catch (IOException e) { |
| log.error("Unable to release file lock: " + pidFileName); |
| } |
| } |
| |
| boolean result = pidFile.delete(); |
| if (!result) { |
| log.error("Delete pid file failed, " + pidFileName); |
| } |
| } |
| |
| } |