Thursday, October 31, 2013

Adding simple Axis2 Listener/Observer to monitor services

To monitor  hosted service statuses, register a listener in the axis2.xml.  The listener should implement  the "AxisObserver". Currently four statuses can be monitored ;

  • Services
    • Start
    • Stop
    • Deploy
    • Undeploy
  • Modules
    • Engage
    • Disengage
    • Deploy
    • Undeploy
Eg:
package org.test.axisobserver;
import java.util.ArrayList;

import org.apache.axiom.om.OMElement;
import org.apache.axis2.AxisFault;
import org.apache.axis2.description.AxisModule;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.AxisServiceGroup;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.axis2.engine.AxisEvent;
import org.apache.axis2.engine.AxisObserver;


/**
 * Axis observer to get notification of service activate/deactiavte/deploy/undeploy operations
 *
 */
public class ServiceMonitorObserver implements AxisObserver {

    public void init(AxisConfiguration arg0) {
}

     public void serviceUpdate(AxisEvent event, AxisService axisService) {
//if service is activated 
if(AxisEvent.SERVICE_START == event.getEventType()){
//do your stuff
}
      //if service is deployed
       if(AxisEvent.SERVICE_DEPLOY == event.getEventType()){
//do your stuff
}
}

public void addParameter(Parameter arg0) throws AxisFault {
}

public void deserializeParameters(OMElement arg0) throws AxisFault {
}

public Parameter getParameter(String arg0) {
return null;
}

public ArrayList getParameters() {
return null;
}

public boolean isParameterLocked(String arg0) {
return false;
}

public void removeParameter(Parameter arg0) throws AxisFault {
}

public void moduleUpdate(AxisEvent arg0, AxisModule arg1) {
}

public void serviceGroupUpdate(AxisEvent arg0, AxisServiceGroup arg1) {
}
}

The above listener can be registered in the axis2 configuration (axis2.xml) as follows;

 <listener class="org.test.axisobserver.ServiceMonitorObserver"/>

Friday, October 18, 2013

Everlasting songs..

Stress relieve music..