initsystem.java

Java开发的权限管理的例子

package org.artemis.right.common;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.xml.DOMConfigurator;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.gsta.eshore.framework.exeception.ClientException;
import com.gsta.eshore.framework.service.impl.ContextServiceLocator;
import com.gsta.eshore.framework.servicerepository.ServiceLocator;
import com.gsta.eshore.framework.util.AppUtils;

public class InitSystem {
	private static Logger logger = Logger.getLogger(InitSystem.class);
	private static boolean state = false;
	private static InitSystem instance;
	
	public static InitSystem getInstance() {
		if (instance == null)
			instance = new InitSystem();
		return instance;
	}

	public InitSystem() {
	}

	public boolean execute() {
		if (state)
			return state;
		state = initlog4j();
		if (state == false)
			throw new ClientException("warning：初始化log4j出错", null);
		state = initspring();
		if (state == false)
			throw new ClientException("warning：初始化spring配置文件出错", null);
		return true;
	}

	public boolean initspring() {
		ApplicationContext ctx = null;
		List list = (List) ServiceLocator.getInstance().getSpringApplicationContext("artemis-right");
		String[] spring_paths = AppUtils.list2Strings(list);
		if (!AppUtils.isBlank(spring_paths)) {
			ctx = new ClassPathXmlApplicationContext(spring_paths);
			// ApplicationContext ctx = new	FileSystemXmlApplicationContext(spring_paths);
			logger.debug("init Spring  success with " + spring_paths.length	+ "config files");
		}
		if (ctx == null) 
			state = false;
		else 
			state = true;
		ContextServiceLocator.getInstance().setContext(ctx);
		logger.debug("ContextServiceLocator context = "	+ ContextServiceLocator.getInstance().getContext());
		return state;
	}

	public boolean initlog4j() {
		String logFile = (String) ServiceLocator.getInstance().getOne("log4j");
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd H:mm:ss a z");
		Date today = new Date();
		String output = "<" + formatter.format(today) + "> <Debug> ";
		System.out.println(output + "application log4j properties file is: "+ logFile);
		if (logFile != null) {
			if (logFile.toString().toLowerCase().endsWith(".xml")) {
				DOMConfigurator.configure(logFile);
			} else {
				PropertyConfigurator.configure(logFile);
			}
			return true;
		} else 
			return false;
	}

}