Package dk.netarkivet.monitor.distribute

Class MonitorMessageHandler

java.lang.Object

dk.netarkivet.monitor.distribute.MonitorMessageHandler

All Implemented Interfaces:

MonitorMessageVisitor, javax.jms.MessageListener

Direct Known Subclasses:

MonitorRegistryServer

public abstract class MonitorMessageHandler
extends Object
implements MonitorMessageVisitor, javax.jms.MessageListener

This default message handler shields of all unimplemented methods from the MonitorMessageVisitor interface.

Classes should not implement MonitorMessageVisitor but extend this class.

See Also:

MonitorMessageVisitor

Constructor Summary

Constructors

Constructor	Description
MonitorMessageHandler()	Creates a MonitorMessageHandler object.

Method Summary

Modifier and Type	Method	Description
void	onMessage(javax.jms.Message msg)	Unpacks and calls accept() on the message object.
void	visit(RegisterHostMessage msg)	This method should be overridden and implemented by a sub class if message handling is wanted.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MonitorMessageHandler

public MonitorMessageHandler()

Creates a MonitorMessageHandler object.

Method Detail

onMessage

public void onMessage(javax.jms.Message msg)

Unpacks and calls accept() on the message object.

This method catches all exceptions and logs them.

Specified by:

onMessage in interface javax.jms.MessageListener

Parameters:

msg - a ObjectMessage

visit

public void visit(RegisterHostMessage msg)
           throws PermissionDenied

This method should be overridden and implemented by a sub class if message handling is wanted.

Specified by:

visit in interface MonitorMessageVisitor

Parameters:

msg - a RegisterHostMessage

Throws:

PermissionDenied - when invoked