log.java

eclipse的hibernate插件,支持eclipse2.*版本

package com.tanghan.util;

import java.io.IOException;
import java.util.Properties;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
/**
 * 用来得到专用于TanghanLib的日志处理器.
 * 
 * @author Jerry Tang
 * @version v0.1.0
 * @copyright  (C) 2003 Tanghan工作组
 *  */
public final class Log {

	/**
	 * 默认类型
	 */
	public static final String CATEGORY = "com.tanghan";
	/**
	 * 当前类型
	 * */
	public static String myCategory = CATEGORY;

	/**
	 * Log的实例
	 */
	protected static Log me = null;

	/**
	 * 日志
	 */
	protected Logger logger = null;

	/**
	 * 构造函数
	 */
	protected Log() {
		initLogger();
	}

	/** 得到Log的实例
	 * @return Log的实例
	 */
	public static Log getInstanse() {
		if (me == null) {
			init();
		}
		return me;
	}

	/**得到一个日志类的实例
	 * @param name 子类型
	 * @return 日志类的实例
	 */
	public Logger getLogger(String name) {
		return Logger.getLogger(myCategory + "." + name);
	}
	/**得到一个日志类的实例
	 * @param class 子类型
	 * @return 日志类的实例
	 */
	public Logger getLogger(Class cls) {
		return Logger.getLogger(cls.getName());
	}

	/**得到一个日志类的实例
	 * @return 日志类的实例
	 */
	public Logger getLogger() {
		return logger;
	}

	/** 更新当前默认日志
	 * @param myLogger 日志类
	 * @param category 当前类型
	 */
	public void setLogger(Logger myLogger, String category) {
		synchronized (logger) {
			if (myLogger != null) {
				logger = myLogger;
			}
		}
		synchronized (category) {
			if (category != null) {
				myCategory = category;
			}
		}
	}

	/**
	 * 初始化函数
	 */
	protected synchronized static void init() {
		if (me == null) {
			me = new Log();
		}
	}

	/**
	 * 初始化函数
	 */
	protected void initLogger() {
		logger = Logger.getLogger(CATEGORY);
		Properties perts = new Properties();
		try {
			perts.load(	getClass().getClassLoader().getResourceAsStream("TanghanLogger.properties"));
		} catch (IOException ex) {
			perts = initProperies();
			ex.printStackTrace();
		}
		PropertyConfigurator.configure(perts);
	}
	/**初始化属性*/
	private Properties initProperies() {
		Properties perts = new Properties();
		//		# For the general syntax of property based configuration files see the
		//		# documenation of org.apache.log4j.PropertyConfigurator.		
		perts.setProperty("log4j.rootLogger", "DEBUG, A1");
		//		# A1 is set to be a ConsoleAppender which outputs to System.out. 
		perts.setProperty("log4j.appender.A1", "org.apache.log4j.ConsoleAppender");
		//		# A1 uses PatternLayout.
		perts.setProperty("log4j.appender.A1.layout", "org.apache.log4j.PatternLayout");
		//		# The conversion pattern uses format specifiers. You might want to
		//		# change the pattern an watch the output format change.		
		perts.setProperty(
			"log4j.appender.A1.layout.ConversionPattern",
			"<%c><%-5p>  %m%n");
		return perts;
	}
}