Re: looking for sample MBean code for tomcat 6

Wed, 09 Jan 2008 12:12:07 -0800 

Hi Frank,

you can add your Mbeans at following file

=== $catalina.base/conf/tomca5-mbeans.xml ==
<bean>

<mbean name="Bean:type=Bean"
        code="test.MyBean">
        <attribute name="name" value="Peter"/>
</mbean>

<jmx-operation objectName="Bean:type=Bean" operation="show"/>

<mbean name="Bean:type=Bean2" code="test.MyBean"/>

<jmx-operation objectName="Bean:type=Bean2"
        operation="setAll">
        <arg type="java.lang.String" value="Willy"/>
        <arg type="java.lang.String">Go to water</arg>
</jmx-operation>

<jmx-operation objectName="Bean:type=Bean2" operation="show"/>
</bean>

===
The Engine element at server.xml can load those MBean instance declaration. 

<Server ...>
...
    <Engine name="Catalina"
        mbeansFile="${catalina.base}/conf/tomcat5-mbeans.xml"
        defaultHost="localhost"
        jvmRoute="node01" >

...
If you implement a init(),start()/stop(),destroy() method your MBeans also notified from 
Engine Lifecycle :-)

Install your MBean Code at common or server classLoader.

=== common/classes/test/MyBean.java ====
package test;

public class MyBean implements MyBeanMBean {

        private String name ;
        
        public String getName() { return name ; }
public void setName(String name) { this.name = name ; System.out.println(name) ;} 

        private String street ;
        
        public String getStreet() { return street ; }
public void setStreet(String street) { this.street = street ; System.out.println(street) ; } 

        public void show() { System.out.println(name + "--" + street) ; }
        public void setAll(String name , String street) {
                this.name = name ;
                this.street = street ;
        }
}
===

=== common/classes/test/MyBeanMBean.java ====
package test;

public interface MyBeanMBean {

        public String getName() ;
        public void setName(String name) ;
        
        public String getStreet() ;
        public void setStreet(String street) ;
        
        public void show() ;
        public void setAll(String name , String street);
}

====

I test the example with tomcat 5.5.25.
I am hasn't tested with tomcat 6, but the insourced modeler code seems also working! 

Regards
Peter
Look at my old fixed issue : http://issues.apache.org/jira/browse/ MODELER-17 But I am not sure that that patch at 2.0.1 is complete ( jmx- attribute element not exists) 

Am 09.01.2008 um 17:25 schrieb Frank Z:


Hi Peter,
Thanks for sending the link.  I guess what my real question was:

how would I get TC to 'declaratively' instantiate my MBeans ?
From the example, most of them has a main() method to instantiate and register the MBeans to the platform MBean Server. What would you recommend for TC , a servlet that loads on startup and within the init method it would create and register the MBeans?
I am porting my MBeans from JBoss (embedding TC) and JBoss provides a declarative method do so without the needs of a servlet. It is done by creating a service archive (e.g. myservice.sar - containing a jboss-service.xml [similar to mbeans-descriptor.xml] that declares the MBeans). The JBoss container would then instantiate the MBeans via the MBean's start() method. 


public class Main {
    public static void main(String[] args) throws Exception {
       MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName name = new ObjectName ("com.example.mbeans:type=Hello"); 
       Hello mbean = new Hello();
       mbs.registerMBean(mbean, name);
       System.out.println("Waiting forever...");
      Thread.sleep(Long.MAX_VALUE);
   }
}

Thanks
Frank.

----- Original Message ----
From: Peter Rossbach <[EMAIL PROTECTED]>
To: Tomcat Users List <users@tomcat.apache.org>
Sent: Wednesday, January 9, 2008 1:20:10 AM
Subject: Re: looking for sample MBean code for tomcat 6

Please read this:

http://java.sun.com/developer/technicalArticles/J2SE/jmx.html
http://java.sun.com/j2se/1.5.0/docs/guide/jmx/tutorial/ tutorialTOC.html 

Peter


Am 09.01.2008 um 08:03 schrieb Frank Z:


hello,
I am looking some sample MBean code for TC 6.0..  I was able to
model some code after the source code (e.g.
MemoryUserDatabaseMBean.java in the org.apache.catalina.users.
package) .

I was also able to create the mbeans-descriptor.xml

One question that I have is that even though the code compiled and
deployed TC, i am not able to see my custom MBean via JConsole .

Are there additional things needed to get the MBean registered
properly in TC?

Thanks in advance.
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