# bcode-trace

**Repository Path**: ytg/bcode-trace

## Basic Information

- **Project Name**: bcode-trace
- **Description**: class字节码追踪，插入监控代码，修改类装载器
- **Primary Language**: Java
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 2
- **Forks**: 2
- **Created**: 2016-09-21
- **Last Updated**: 2021-01-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

class字节码追踪，插入监控代码，修改类装载器
1) 打jar包放到tomcat/lib目录下
2) 需要在tomcat中配置自定义类装载器
<Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">       
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" pattern="%h %l %u %t &quot;%r&quot; %s %b" prefix="localhost_access_log." suffix=".txt"/>      
      <Context docBase="CommunityGovernor" path="/CommunityGovernor" reloadable="true" source="org.eclipse.jst.j2ee.server:CommunityGovernor"/>			
      <Context docBase="CommunityWeb" path="/CommunityWeb" reloadable="true" source="org.eclipse.jst.jee.server:CommunityWeb">
      	<Loader loaderClass="com.zzwtec.loader.TransformClassLoader"></Loader>
      </Context>
</Host>

或者

<Context>   
    <WatchedResource>WEB-INF/web.xml</WatchedResource>    
	<Loader loaderClass="com.zzwtec.loader.TransformClassLoader"></Loader>	
</Context>

3) 启动tomcat,控制台将出现对目标代码的监控

类似如下com.zzwtec.community.action.system.AccountController.loginUI 执行时间:408 毫秒