Java tutorial
// 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 // 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.cloud.usage; import java.io.File; import java.io.FileNotFoundException; import org.apache.commons.daemon.Daemon; import org.apache.commons.daemon.DaemonContext; import org.apache.commons.daemon.DaemonInitException; import org.apache.log4j.Logger; import org.apache.log4j.PropertyConfigurator; import org.apache.log4j.xml.DOMConfigurator; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.util.Log4jConfigurer; import com.cloud.utils.PropertiesUtil; import com.cloud.utils.component.ComponentContext; public class UsageServer implements Daemon { private static final Logger s_logger = Logger.getLogger(UsageServer.class.getName()); public static final String Name = "usage-server"; private UsageManager mgr; private ClassPathXmlApplicationContext appContext; /** * @param args */ public static void main(String[] args) { initLog4j(); UsageServer usage = new UsageServer(); usage.start(); } @Override public void init(DaemonContext arg0) throws DaemonInitException, Exception { initLog4j(); } @Override public void start() { appContext = new ClassPathXmlApplicationContext("usageApplicationContext.xml"); try { ComponentContext.initComponentsLifeCycle(); } catch (Exception e) { e.printStackTrace(); } mgr = appContext.getBean(UsageManager.class); if (mgr != null) { if (s_logger.isInfoEnabled()) { s_logger.info("UsageServer ready..."); } } } @Override public void stop() { appContext.close(); } @Override public void destroy() { } static private void initLog4j() { File file = PropertiesUtil.findConfigFile("log4j-cloud.xml"); if (file != null) { System.out.println("log4j configuration found at " + file.getAbsolutePath()); try { Log4jConfigurer.initLogging(file.getAbsolutePath()); } catch (FileNotFoundException e) { s_logger.info("[ignored] log initialisation ;)" + e.getLocalizedMessage(), e); } DOMConfigurator.configureAndWatch(file.getAbsolutePath()); } else { file = PropertiesUtil.findConfigFile("log4j-cloud.properties"); if (file != null) { System.out.println("log4j configuration found at " + file.getAbsolutePath()); try { Log4jConfigurer.initLogging(file.getAbsolutePath()); } catch (FileNotFoundException e) { s_logger.info("[ignored] log properties initialization :)" + e.getLocalizedMessage(), e); } PropertyConfigurator.configureAndWatch(file.getAbsolutePath()); } } } }