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JAMon监控web工程方法的调用性能
JAMon简介
JAMon的全名是：Java Application Monitor。它是一个小巧的，免费的，高性能的，线程安全的性能监测工具。
它可以用来测定系统的性能瓶颈，也可以用来监视用户和应用程序之间的交互情况。
Jamon主要是用来检测jee的应用程序。
JAMon集成到项目中
假设现在有一个项目名为bookShop,目录结构如下：
bookshop
java resources
src
com.allen.bookshop
filter
PageMonFilter
webContent
jamon
WEB-INF
web.xml
1.到官网去下载两个包：jamon.rar和jamon-sample.rar
http://sourceforge.net/projects/jamonapi/files/
jamon.rar里面有源码和api。
jamon-sample.rar里面有基本示例。
解压jamon-sample.rar，把解压后的文件jamon直接拷贝到webContent下，具体文件如下图：
2.把解压jamon-sample.rar后jamon文件里的webContent下的lib下的jar包，拷贝到自己工程的lib下。
3.新建一个PageMonFilter类，如上目录结构：
import java.io.IOException;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import com.jamonapi.JAMonFilter;import com.jamonapi.MonKeyImp;import com.jamonapi.Monitor;import com.jamonapi.MonitorFactory;public class PageMonFilter extends JAMonFilter{ private static final long serialVersionUID = 5746197114960908454L; private FilterConfig filterConfig = null; public void init( FilterConfig filterConfig ) throws ServletException { this.filterConfig = filterConfig; } public void destroy() { this.filterConfig = null; } public void doFilter( ServletRequest request, ServletResponse response, FilterChain filterChain ) throws IOException, ServletException { Monitor allPages = MonitorFactory.start( new MonKeyImp( "jammon.webui.allPages", getURI( request ), "ms." ) ); Monitor monitor = MonitorFactory.start( getURI( request ) ); try { filterChain.doFilter( request, response ); } finally { monitor.stop(); allPages.stop(); } } protected String getURI( ServletRequest request ) { if ( request instanceof HttpServletRequest ) { return ((HttpServletRequest)request).getRequestURI(); } else { return "Not an HttpServletRequest"; } }}
4.在web.xml上增加如下代码：
<filter> <filter-name>JAMonFilter</filter-name> <filter-class>com.allen.bookshop.filter.PageMonFilter</filter-class> </filter> <filter-mapping> <filter-name>JAMonFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
5.增加jamon_bean.xml文件, 用于配置你要监听哪些类。action方法不用配置，默认会监听。
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:osgi="http://www.springframework.org/schema/osgi" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd "> <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> <property name="beanNames"> <list> <value>bookshopService</value> </list> </property> <property name="interceptorNames"> <list> <value>jamonInterceptor</value> </list> </property> </bean> <bean id="jamonInterceptor" class="org.springframework.aop.interceptor.JamonPerformanceMonitorInterceptor"></bean></beans>
6.在log4j.properties中添加如下配置：
log4j.logger.org.springframework.aop.interceptor.JamonPerformanceMonitorInterceptor = TRACE
重新启动工程。
至此，配置完成，现在可以访问http://localhost:8080/bookshop/jamon/menu.jsp访问jamon了