com.tonbeller.wcf.controller
Class DispatcherSupport

java.lang.Object
  com.tonbeller.wcf.controller.DispatcherSupport

All Implemented Interfaces:

Dispatcher, RequestListener

public class DispatcherSupport

extends java.lang.Object

implements Dispatcher

Fires events to listeners depending on parameters in the HttpServletRequest.

• If a listener is registered with name and value, it receives the event if the request contains a paramter with that name and value.
• If a listener is registered with name only, it receives the event if the request contains a parameter with that name and any value.
• If a listener is registered with value only, it receives the event if the request contains a parameter with that value and any name.
• If a listener is registered with no name and no value, it receives every request.

Constructor Summary

DispatcherSupport()

Method Summary

void	addRequestListener(java.lang.String name, java.lang.String value, RequestListener listener) Adds a listener.
void	clear() removes all listeners
java.util.List	findMatchingListeners(java.util.Map httpParams) returns the leaf RequestListeners that would be invoked for a http request containing httpParams
void	removeRequestListener(RequestListener listener) removes a listener.
void	request(RequestContext context) fires event to all matching listeners

Methods inherited from class java.lang.Object

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

Constructor Detail

DispatcherSupport

public DispatcherSupport()

Method Detail

addRequestListener

public void addRequestListener(java.lang.String name,
                               java.lang.String value,
                               RequestListener listener)

Adds a listener. A listener can only be registered once. If its registered more than one, the last name/value pair will be used.

Specified by:

addRequestListener in interface Dispatcher

Parameters:

name - name of the request parameter or null

value - of the request parameter or null

listener - the listener to register

removeRequestListener

public void removeRequestListener(RequestListener listener)

removes a listener.

Specified by:

removeRequestListener in interface Dispatcher

Parameters:

listener - the listener to remove

clear

public void clear()

removes all listeners

Specified by:

clear in interface Dispatcher

request

public void request(RequestContext context)
             throws java.lang.Exception

fires event to all matching listeners

Specified by:

request in interface Dispatcher

Parameters:

context - the current request

Throws:

java.lang.Exception - the exception from listeners

findMatchingListeners

public java.util.List findMatchingListeners(java.util.Map httpParams)

returns the leaf RequestListeners that would be invoked for a http request containing httpParams

Specified by:

findMatchingListeners in interface Dispatcher