Java项目性能监控和调优工具-Javamelody

水深无声 2022-07-11 09:25 370阅读 0赞

JavaMelody能够在运行环境监测[Java][]或[Java EE][]应用程序服务器。并以图表的形式显示：Java内存和[Java][Java 1]CPU使用情况，用户Session数量，JDBC连接数，和http请求、sql请求、jsp页面与业务接口方法（EJB3、[spring][Java EE]、Guice）的执行数量，平均执行时间，错误百分比等。图表可以按天，周，月，年或自定义时间段查看。

***监控效果图见本文结尾部分.***

配置方式:  
1.下载地址:[http://code.google.com/p/javamelody/downloads/list][http_code.google.com_p_javamelody_downloads_list]  
目前为止最新版本是1.47.0,下载地址:[http://code.google.com/p/javamelody/downloads/detail?name=javamelody-1.47.0.zip&can=2&q=][http_code.google.com_p_javamelody_downloads_detail_name_javamelody-1.47.0.zip_can_2_q]  
2.下载后可以解压找到javamelody-1.47.0.jar和jrobin-1.5.9.1.jar,引用到项目中.

3.在web.xml中配置filter:

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1.  <filter>  
2.          <filter-name>monitoring</filter-name>  
3.          <filter-class>net.bull.javamelody.MonitoringFilter</filter-class>  
4.          <init-param>  
5.              <param-name>log</param-name>  
6.              <param-value>true</param-value>  
7.          </init-param>  
8.      </filter>  
9.      <filter-mapping>  
10.         <filter-name>monitoring</filter-name>  
11.         <url-pattern>/\*</url-pattern>  
12.     </filter-mapping>  
13.     <listener>  
14.         <listener-class>net.bull.javamelody.SessionListener</listener-class>  
15.     </listener>

4.重启项目:打开链接:http://<host>:<port>/projectname/monitoring  
例如:http://127.0.0.1:8080/myproj/monitoring

**至此,基本配置已完成,可以进行简单的性能监控,下面配置是javamelody与struts2和spring3的集成配置:**

5.javamelody和struts2集成时配置:

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1.  <package name="base" namespace="/" extends="struts-default">  
2.          <result-types>  
3.              <result-type name="json" class="org.apache.struts2.json.JSONResult" />  
4.          </result-types>  
5.          <interceptors>  
6.                
7.              <interceptor name="monitoring" class="net.bull.javamelody.StrutsInterceptor" />  
8.                
9.              <interceptor-stack name="myStack">  
10.                 <interceptor-ref name="monitoring" />  
11.                   
12.                   
15.                 <interceptor-ref name="defaultStack" />  
16.             </interceptor-stack>  
17.         </interceptors>  
18.         <default-interceptor-ref name="myStack" />

其他struts配置文件继承base，如下所示：

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1.  <package name="example" namespace="/" extends="base">  
2.          <action name="student\_\*" class="studentAction" method="\{1\}">  
3.              <result name="input">/pub\_error.jsp</result>  
4.          </action>  
5.      </package>

6.javamelody与Spring集成:  
spring的配置文件中配置:

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1.  <bean id= "facadeMonitoringAdvisor" class="net.bull.javamelody.MonitoringSpringAdvisor" >  
2.           <property name ="pointcut" >  
3.                   <bean class="org.springframework.aop.support.JdkRegexpMethodPointcut" >  
4.                           <property name ="pattern" value="com.proj.\*.service.\*" />  
5.                   </bean>  
6.           </property>  
7.  </bean>

然后配置:  
方式一,web.xml中加入如下配置:  
<context-param>  
     <param-name> contextConfigLocation</param-name>  
             <param-value>  
                  classpath:applicationContext\*.xml  
                  classpath:net/bull/javamelody/monitoring-spring.xml  
             </param-value>  
</context-param>  
  
  
方式二,在spring.xml中加入如下配置:  
<import resource="classpath:net/bull/javamelody/monitoring-spring.xml" />

7.如果你的所有spring管理的bean都实现了接口,用步骤6中的配置一切OK,但如果有些bean没有实现接口,使用步骤6中的配置将会出错.  
则将步骤6中的配置改为(这样将使用cglib代理):  
spring配置文件中配置:  
<bean id= "facadeMonitoringAdvisor" class="net.bull.javamelody.MonitoringSpringAdvisor" >  
         <property name ="pointcut" >  
                 <bean class="org.springframework.aop.support.JdkRegexpMethodPointcut" >  
                         <property name ="pattern" value="com.proj.\*.service.\*" />  
                 </bean>  
         </property>  
</bean>  
  
  
方式一,web.xml中加入如下配置:  
<context-param>  
<param-name> contextConfigLocation</param-name>  
             <param-value>  
                  classpath:applicationContext\*.xml  
                  classpath:net/bull/javamelody/monitoring-spring-aspectj.xml  
             </param-value>  
</context-param>  
  
  
方式二,在spring.xml中加入如下配置:  
<import resource="classpath:net/bull/javamelody/monitoring-spring-aspectj.xml" />

8.在项目中经常这样得到泛型类:

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1.  private Class<T> entityClass = (Class<T>) ((ParameterizedType) getClass()  
2.              .getGenericSuperclass()).getActualTypeArguments()\[0\];

使用步骤7配置的cglib代理后会以上代码会出错,可以改为下面这种方式得到泛型类:

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1.  private Class<T> entityClass = (Class<T>) getSuperClassGenricType(this  
2.              .getClass(), 0);  
3.  public static Class<?> getSuperClassGenricType(Class<?> clazz, int index)  
4.              throws IndexOutOfBoundsException \{  
5.          Type genType = clazz.getGenericSuperclass();  
6.    
7.          if (!(genType instanceof ParameterizedType)) \{  
8.              return Object.class;  
9.          \}  
10.   
11.         Type\[\] params = ((ParameterizedType) genType).getActualTypeArguments();  
12.   
13.         if (index >= params.length || index < 0) \{  
14.             return Object.class;  
15.         \}  
16.         if (!(params\[index\] instanceof Class<?>)) \{  
17.             return Object.class;  
18.         \}  
19.         return (Class<?>) params\[index\];  
20.     \}

9.javamelody缓存文件的清除:默认路径一般在tomcat\_home/temp/javamelody中.  
  
10.如果需要将结果导出为pdf,只要在项目中引用iText.jar即可自动加上导出pdf的链接.  
  
11.javamelody与Quartz集成需要配置:

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1.  <bean id="quartzScheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">  
2.                  <property name="exposeSchedulerInRepository" value="true" />  
3.                  ...  
4.          </bean>

12.javamelody中配置可选参数:  
web.xml中配置,以日志记录为例,如下配置将开启info级别的日志记录:

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1.  <filter>  
2.                  <filter-name>monitoring</filter-name>  
3.                  <filter-class>net.bull.javamelody.MonitoringFilter</filter-class>  
4.                  <init-param>  
5.                          <param-name>log</param-name>  
6.                          <param-value>true</param-value>  
7.                  </init-param>  
8.          </filter>

其他可选参数:  
system-actions-enabled:默认为true,控制启动或停止system actions garbage collector, http sessions, heap dump, memory histogram, process list, jndi tree, opened jdbc connections, database.  
  
url-exclude-pattern:可配置正则表达式,排除一些url不监控.  
  
http-transform-pattern,sql-transform-pattern,ejb-transform-pattern, spring-transform-pattern, guice-transform-pattern, error-transform-pattern, log-transform-pattern, job-transform-pattern, jsf-transform-pattern, struts-transform-pattern and jsp-transform-pattern :可配置正则表达式,用于合并javamelody统计数据.  
  
storage-directory: 默认为以javamelody,tomcat为例,默认存储路径为TOMCAT\_HOME/temp/javamelody  
  
monitoring-path:默认为:/monitoring,可以更改为其他地址,例如改为/mo,则监控地址改为:http://<host>:<port>/projectname/mo  
  
no-database:默认false,配置为true将不监控和数据有关的行为.  
  
disabled:默认false,配置为true将不再监控.

更多内容请参考:http://code.google.com/p/javamelody/wiki/UserGuide

扩展部分:增加访问权限校验

public class MiaoshaMonitoringFilter extends MonitoringFilter {  
       
        protected boolean isRequestAllowed(HttpServletRequest httpRequest) {  
            HttpSession session = httpRequest.getSession();  
            if (session == null) {  
                return false;  
            }  
            User user = (User) session.getAttribute(UserConstants.SEESSION_USER);  
            if(user==null){  
                return false;  
            }  
            return user.isAdmin();  
        }  
    }

**效果图:**

![SouthEast][]

以上文章转自:http://blog.csdn.net/lk\_blog/article/details/13760999[点击打开链接][Link 1]

[Java]: http://lib.csdn.net/base/javase
[Java EE]: http://lib.csdn.net/base/javaee
[Java 1]: http://lib.csdn.net/base/java
[http_code.google.com_p_javamelody_downloads_list]: http://code.google.com/p/javamelody/downloads/list
[http_code.google.com_p_javamelody_downloads_detail_name_javamelody-1.47.0.zip_can_2_q]: http://code.google.com/p/javamelody/downloads/detail?name=javamelody-1.47.0.zip&can=2&q=
[view plain]: http://blog.csdn.net/lk_blog/article/details/13760999#
[SouthEast]: /images/20220711/ab8c71d54cf44bd586b0b19f3aaa16fe.png
[Link 1]: http://blog.csdn.net/lk_blog/article/details/13760999