butorhostlistener.java

一个实用工具类

/*
 * Copyright (C) butor.com. All rights reserved.
 *
 * This software is published under the terms of the GNU Library General
 * Public License (GNU LGPL), a copy of which has been included with this
 * distribution in the LICENSE.txt file. 
 */
package org.butor.web.listener;

import java.io.File;
import java.io.IOException;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;
import org.butor.config.ConfigFactory;
import org.butor.config.IConfig;
import org.butor.fwService.starter.FwServiceStarter;
import org.butor.helper.PropertiesHelper;
import org.butor.log.Log;

/**
 * @version 	1.0
 * @author
 */
public class ButorHostListener implements LifecycleListener {
	// System arguments.
	public static final String PARAM_HOST_CONFIG = "butor_host_config";
	public static final String PARAM_ENV = "butor_env";
	public static final String PARAM_REPOSITORY_CONF_DIR = "butor_repository_conf_dir";

	protected FwServiceStarter f_services = null;
	protected String f_confDir = null;
	protected IConfig f_config = null;

	public void lifecycleEvent(LifecycleEvent e) {
		Log.logStr(this, Log.LOG_TYPE_INFO, "lifecycleEvent()", "Event: " +e.getType());
		
		if (e.getType().equals("start")) {
			startServices();
			
		} else if (e.getType().equals("stop")) {
			stopServices();
		}
	}
	/**
	 * Initialize this servlet.
	 *
	 * @exception ServletException if we cannot configure ourselves correctly
	 */
	protected void startServices() {

		PropertiesHelper.loadSystemProperties();

		Log.logStr(this, Log.LOG_TYPE_INFO, "startServices()", "Starting services ...");

		loadConfig();

		f_services = new FwServiceStarter(f_config);

		if (Log.shouldLog(this.getClass().getName(), Log.LOG_LEVEL_LOW)) {
			Log.logStr(this, Log.LOG_TYPE_INFO, "startServices()", 
				"Final config: " +f_config);
		}
	}
	/**
	 * 
	 */
	protected void stopServices() {
		Log.logStr(this, Log.LOG_TYPE_INFO, "stopServices()", "Stopping services ...");
		f_services.shutdown();
	}
	/**
	 * Init config.
	 */
	protected void loadConfig() {

		f_config = null;

		String confFile = System.getProperty(PARAM_HOST_CONFIG, null);
			
		if (confFile == null) {
			Log.logStr(this, Log.LOG_TYPE_WARN, "loadConfig()", 
				"Missing " + PARAM_HOST_CONFIG +" parameter!");
			return;
		}

		String env = System.getProperty(PARAM_ENV, null);
		String externalConfPath =
			System.getProperty(PARAM_REPOSITORY_CONF_DIR, null);
		
		Log.logStr(this, Log.LOG_TYPE_INFO, "loadConfig()", 
			"Got parameters: " +PARAM_HOST_CONFIG +"=[" + confFile +"] " 
			+ PARAM_ENV +"=[" + env +"] " 
			+ PARAM_REPOSITORY_CONF_DIR + "=[" + externalConfPath +"]");
		
		int pos = confFile.lastIndexOf(File.separator);
		if (pos > -1) {
			f_confDir =	confFile.substring(0, pos);
		}

		String[] externalConfSuffixes = ConfigFactory.getConfigSuffixes(null);

		try {
			f_config = ConfigFactory.loadConfigFile(confFile, f_confDir,
					externalConfPath, ConfigFactory.getLogDir(), externalConfSuffixes);
	
		} catch (IOException e) {
			Log.logException(this, Log.LOG_TYPE_WARN, "loadConfig()", e);
		}
	}
}