基于JMX动态配置Log4J日志级别

先来看比较low的修改日志级别的方式，在写程序里面。

http://blog.gssxgss.me/java%E8%BF%90%E8%A1%8C%E6%97%B6%E5%8A%A8%E6%80%81%E6%94%B9%E5%8F%98%E6%97%A5%E5%BF%97%E7%BA%A7%E5%88%AB/

再来通过JMX的方法动态修改程序的日志级别。

https://blog.csdn.net/z2007130205/article/details/23910431

package com.minxinloan.common.log;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jmx.export.annotation.ManagedAttribute;
import org.springframework.jmx.export.annotation.ManagedOperation;
import org.springframework.jmx.export.annotation.ManagedOperationParameter;
import org.springframework.jmx.export.annotation.ManagedOperationParameters;
import org.springframework.jmx.export.annotation.ManagedResource;

/**
 * 基于JMX动态配置Log4J日志级别，并控制Trace开关的MBean.
 *
 * @author z
 * @version 2013-12-10
 */
@ManagedResource(objectName = Log4jManager.MBEAN_NAME, description = "Log4j Management Bean")
public class Log4jManager {

	/**
	 * Log4jManager的Mbean的注册名称.
	 */
	public static final String MBEAN_NAME = "log4j:name=Log4j";

	private static org.slf4j.Logger managerLogger = LoggerFactory.getLogger(Log4jManager.class);

	private String projectLoggerName;

	@ManagedAttribute(description = "Level of the root logger")
	public String getRootLoggerLevel() {
		Logger logger = Logger.getRootLogger();
//		MBeanServer server = MBeanServerFactory.createMBeanServer();
		return logger.getEffectiveLevel().toString();
	}

	@ManagedAttribute
	public void setRootLoggerLevel(String newLevel) {
		Logger logger = Logger.getRootLogger();
		Level level = Level.toLevel(newLevel);
		logger.setLevel(level);
		managerLogger.info("设置Root Logger 级别为{}", newLevel);
	}

	/**
	 * 获得项目默认logger的级别.
	 * 项目默认logger名称通过#setProjectLoggerName(String)配置.
	 */
	@ManagedAttribute(description = "Level of the project default package logger")
	public String getProjectLoggerLevel() {
		if (projectLoggerName != null) {
			return getLoggerLevel(projectLoggerName);
		}

		return null;
	}

	/**
	 * 设置项目默认logger的级别.
	 * 项目默认logger名称通过#setProjectLoggerName(String)配置.
	 */
	@ManagedAttribute
	public void setProjectLoggerLevel(String newLevel) {
		if (projectLoggerName != null) {
			setLoggerLevel(projectLoggerName, newLevel);
		}
	}

	/**
	 * 获取Logger的日志级别.
	 */
	@ManagedOperation(description = "Get logging level of the logger")
	@ManagedOperationParameters({ @ManagedOperationParameter(name = "loggerName", description = "Logger name") })
	public String getLoggerLevel(String loggerName) {
		Logger logger = Logger.getLogger(loggerName);
		return logger.getEffectiveLevel().toString();
	}

	/**
	 * 设置Logger的日志级别.
	 * 如果日志级别名称错误, 设为DEBUG.
	 */
	@ManagedOperation(description = "Set new logging level to the logger")
	@ManagedOperationParameters({ @ManagedOperationParameter(name = "loggerName", description = "Logger name"),
			@ManagedOperationParameter(name = "newlevel", description = "New level") })
	public void setLoggerLevel(String loggerName, String newLevel) {
		Logger logger = Logger.getLogger(loggerName);
		Level level = Level.toLevel(newLevel);
		logger.setLevel(level);
		managerLogger.info("设置{}级别为{}", loggerName, newLevel);
	}

	/**
	 * 根据log4j.properties中的定义, 设置项目默认的logger名称
	 */
	public void setProjectLoggerName(String projectLoggerName) {
		this.projectLoggerName = projectLoggerName;
	}

}

　　

import static org.junit.Assert.assertEquals;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.junit.Test;

import com.minxinloan.common.log.Log4jManager;

public class Log4jManagerTest {

	@Test
	public void testLoggerLevel() {
		String loggerName = "org.springside.modules";
		Log4jManager mbean = new Log4jManager();
		String orgLevel = mbean.getLoggerLevel(loggerName);

		Logger.getLogger(loggerName).setLevel(Level.FATAL);
		assertEquals("FATAL", mbean.getLoggerLevel(loggerName));

		mbean.setLoggerLevel(loggerName, "TRACE");
		assertEquals("TRACE", mbean.getLoggerLevel(loggerName));

		mbean.setLoggerLevel(loggerName, "WRONG_LEVEL_NAME");
		assertEquals("DEBUG", mbean.getLoggerLevel(loggerName));

		mbean.setLoggerLevel(loggerName, orgLevel);
	}
}

　　

package com.minxinloan.common.log; import org.apache.log4j.Level;import org.apache.log4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.jmx.export.annotation.ManagedAttribute;import org.springframework.jmx.export.annotation.ManagedOperation;import org.springframework.jmx.export.annotation.ManagedOperationParameter;import org.springframework.jmx.export.annotation.ManagedOperationParameters;import org.springframework.jmx.export.annotation.ManagedResource; /** * 基于JMX动态配置Log4J日志级别，并控制Trace开关的MBean. *  * @author z * @version 2013-12-10 */@ManagedResource(objectName = Log4jManager.MBEAN_NAME, description = "Log4j Management Bean")public class Log4jManager { /** * Log4jManager的Mbean的注册名称. */public static final String MBEAN_NAME = "log4j:name=Log4j"; private static org.slf4j.Logger managerLogger = LoggerFactory.getLogger(Log4jManager.class); private String projectLoggerName; @ManagedAttribute(description = "Level of the root logger")public String getRootLoggerLevel() {Logger logger = Logger.getRootLogger();//MBeanServer server = MBeanServerFactory.createMBeanServer();return logger.getEffectiveLevel().toString();} @ManagedAttributepublic void setRootLoggerLevel(String newLevel) {Logger logger = Logger.getRootLogger();Level level = Level.toLevel(newLevel);logger.setLevel(level);managerLogger.info("设置Root Logger 级别为{}", newLevel);} /** * 获得项目默认logger的级别. * 项目默认logger名称通过#setProjectLoggerName(String)配置. */@ManagedAttribute(description = "Level of the project default package logger")public String getProjectLoggerLevel() {if (projectLoggerName != null) {return getLoggerLevel(projectLoggerName);} return null;} /** * 设置项目默认logger的级别. * 项目默认logger名称通过#setProjectLoggerName(String)配置. */@ManagedAttributepublic void setProjectLoggerLevel(String newLevel) {if (projectLoggerName != null) {setLoggerLevel(projectLoggerName, newLevel);}} /** * 获取Logger的日志级别. */@ManagedOperation(description = "Get logging level of the logger")@ManagedOperationParameters({ @ManagedOperationParameter(name = "loggerName", description = "Logger name") })public String getLoggerLevel(String loggerName) {Logger logger = Logger.getLogger(loggerName);return logger.getEffectiveLevel().toString();} /** * 设置Logger的日志级别. * 如果日志级别名称错误, 设为DEBUG. */@ManagedOperation(description = "Set new logging level to the logger")@ManagedOperationParameters({ @ManagedOperationParameter(name = "loggerName", description = "Logger name"),@ManagedOperationParameter(name = "newlevel", description = "New level") })public void setLoggerLevel(String loggerName, String newLevel) {Logger logger = Logger.getLogger(loggerName);Level level = Level.toLevel(newLevel);logger.setLevel(level);managerLogger.info("设置{}级别为{}", loggerName, newLevel);} /** * 根据log4j.properties中的定义, 设置项目默认的logger名称 */public void setProjectLoggerName(String projectLoggerName) {this.projectLoggerName = projectLoggerName;} }