Java Project performance monitoring and tuning tools-javamelody Learning Summary

1. Introduction:

Javamelody can monitor Java or Java EE application servers in a running environment. It is displayed as a graph: Java memory and Java CPU usage, number of user sessions, JDBC connections, and HTTP requests, SQL requests, JSP pages and Business interface methods (EJB3, Spring, Guice), average execution time, Error percentage, and so on. Charts can be viewed by day, week, month, year, or custom time period.

2. Prepare:

Download Javamelody-1.47.0.jar and Jrobin-1.5.9.1.jar, referenced in the project.

3. Configuration method:

The filter configuration of javamelody is usually added before the first filter to ensure that the filter of the javamelody is first executed

Configure filter in Web. xml:

  <filter>    <filter-name>monitoring</filter-name><filter-class> Net.bull.javamelody.monitoringfilter</filter-class></filter><filter-mapping><filter-name >monitoring</filter-name><url-pattern>/*</url-pattern></filter-mapping><listener ><listener-class>net.bull.javamelody.SessionListener</listener-class></listener>

4. Restart Project: Open link: http://

Now that the basic configuration is complete and you can perform simple performance monitoring, javamelody and Struts2 and Spring3 can also be integrated, which is explained in detail in the following summary.

5. Integration with STRUTS2:

1) Add the following code to the Struts-common.xml:

   <package name= "Default" extends= "Struts-default" >      <interceptors>          <interceptor name= " Monitoring "class=" Net.bull.javamelody.StrutsInterceptor "/>                    <interceptor-stack name=" Mystack ">              <interceptor-ref name= "Monitoring"/>              <interceptor-ref name= "Defaultstack"/>          </ interceptor-stack>      </interceptors>      <default-interceptor-ref name= "Mystack"/>  </ Package>

2) Change the extends in the struts-module name. xml to default, i.e.:

6. Integration with spring

1) Add the following code to the Spring-common.xml:

  <bean id= "Facademonitoringadvisor" class= "Net.bull.javamelody.MonitoringSpringAdvisor" >      <property Name= "Pointcut" >          <bean class= "Org.springframework.aop.support.JdkRegexpMethodPointcut" >              < Property name= "pattern" value= "Mgr.*.*.service"/>          </bean>      </property>  </bean>

7. Monitoring Entities

Add a red statement (must use JavaMelody1.5 and above) at the top of the Persistence.xml file for the entity, such as:

<persistence-unit name= "gxpt-qx-entity" transaction-type= "JTA" >          <provider> Net.bull.javamelody.jpapersistence</provider>          <jta-data-source>java:/mysqlds</ jta-data-source>          <properties>               <!--<property name= "Hibernate.dialect" value= " Org.hibernate.dialect.Oracle10gDialect "/>--              <property name=" Hibernate.dialect "value=" Org.hibernate.dialect.MySQLDialect "/>              <property name=" Hibernate.hbm2ddl.auto "value=" Update "/>              <property name= "Hibernate.show_sql" value= "true"/>          </properties>      

8. View Javamelody

access the directory after adding/javamelody, such as Http://localhost:8080/javamelody.

Java Project performance monitoring and tuning tools-javamelody Learning Summary