How to create a SAR archive in EAP6

Environment

• Red Hat JBoss Enterprise Application Platform (EAP)
  • 6.x

Issue

• How to create a Service Archive in JBoss EAP6.

• We How to install existing MBeans in EAP 6?

Resolution

• The SARDeployer/MBean Deployer is loaded when JBoss starts up as part of the bootstrap process. The SAR acronym stands for service archive. The SARDeployer handles services archives. A service archive can be either a jar that ends with a .sar suffix and contains a META-INF/jboss-service.xml descriptor, or a standalone XML descriptor with a naming pattern that matches *-service.xml. JBoss introduces a service life cycle interface that describes the events a service can use to manage its behavior.

• Writing an MBean that relies on a JBoss service requires you to follow the JBoss service pattern. The JBoss MBean service pattern consists of a set of life cycle operations like create, start, stop, and destroy that provide state change notifications.

• We can create a Service MBean in JBoss EAP6 By simply creating a Class and adding start() and stop() to it and by creating a $YOUR_SAR/META-INF/jboss-service.xml like following:

Step-1). create an interface as following:

package test;
public interface TestMBean
  {
      public void setMessage(String message);
      public String getMessage();
  }

Step-2). Create an implementation class of above interface along with start() and stop() additional methods.

package test;
import javax.management.*;
import java.io.*;
import java.util.*;
import java.rmi.*;
import javax.naming.*;
public class Test implements TestMBean
  {
      boolean flag=true;
      public String Message;

      public Test()
      {
         System.out.println(" TestMBean is activated...inside Test() constructor--setting default Message=Hello");;
      }

      public void setMessage(String Message)
      {
          System.out.println("nt Server Watch Message is set to : "+Message);
          this.Message=Message;
      }

      public String getMessage()
      {
          System.out.println(" Server Watch Message is set to : "+Message);
          return this.Message;
      }

     public void start() throws Exception
      {
            System.out.println("Starting start() Test invoked");
            Message="JBoss";
      }

     public void stop() throws Exception
      {
            System.out.println("Stopping stop() Test  invoked");
      }
  }

Step3). Compile above classes and place it inside test.sar

Step4). Add a jboss-service.xml inside test.sar/META-INF as following:

<?xml version="1.0" encoding="UTF-8"?>
<server xmlns="urn:jboss:service:7.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="urn:jboss:service:7.0 jboss-service_7_0.xsd">
    <mbean code="test.Test" name="test.testing:service=MyTestMBean">
         <attribute name="Message">HelloWorld</attribute>
    </mbean>
</server>

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