Module org.apache.wicket.core

Package org.apache.wicket.request.cycle

Class RequestCycleListenerCollection

java.lang.Object

org.apache.wicket.util.listener.ListenerCollection<IRequestCycleListener>

org.apache.wicket.request.cycle.RequestCycleListenerCollection

All Implemented Interfaces:

Serializable, Iterable<IRequestCycleListener>, IRequestCycleListener

public class RequestCycleListenerCollection
extends ListenerCollection<IRequestCycleListener>
implements IRequestCycleListener

Composite IRequestCycleListener that notifies all registered listeners with each IRequestCycleListener event.

Order of notification onBeginRequest(RequestCycle), onRequestHandlerScheduled(RequestCycle, IRequestHandler) and onRequestHandlerResolved(RequestCycle, IRequestHandler) are notified in first in, first out order.

onEndRequest(RequestCycle) and onDetach(RequestCycle) are notified in last in first out order (i.e. reversed order). So for these events the collection functions as a stack.

Exception handling The RequestCycleListenerCollection will use the first exception handler that is returned from all listeners in onException(RequestCycle, Exception)

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.util.listener.ListenerCollection

ListenerCollection.INotifier<T>

Constructor Summary

Constructors

Constructor	Description
RequestCycleListenerCollection()

Method Summary

Modifier and Type	Method	Description
void	onBeginRequest(RequestCycle cycle)	Notifies all registered listeners of the onBeginRequest event in first in first out order, i.e.
void	onDetach(RequestCycle cycle)	Notifies all registered listeners of the onDetach event in first in last out order (i.e.
void	onEndRequest(RequestCycle cycle)	Notifies all registered listeners of the onEndRequest event in first in last out order (i.e.
IRequestHandler	onException(RequestCycle cycle, Exception ex)	Notifies all registered listeners of the exception and calls the first handler that was returned by the listeners.
void	onExceptionRequestHandlerResolved(RequestCycle cycle, IRequestHandler handler, Exception exception)	Called when an IRequestHandler is resolved for an exception and will be executed.
void	onRequestHandlerExecuted(RequestCycle cycle, IRequestHandler handler)	Called after an IRequestHandler has been executed.
void	onRequestHandlerResolved(RequestCycle cycle, IRequestHandler handler)	Called when an IRequestHandler is resolved and will be executed.
void	onRequestHandlerScheduled(RequestCycle cycle, IRequestHandler handler)	Called when a IRequestHandler has been scheduled.
void	onUrlMapped(RequestCycle cycle, IRequestHandler handler, Url url)	Called after a Url is generated for a IRequestHandler.

Methods inherited from class org.apache.wicket.util.listener.ListenerCollection

add, isAllowingDuplicates, isAllowingNulls, iterator, notify, notifyIgnoringExceptions, remove, reversedNotify, reversedNotifyIgnoringExceptions

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

RequestCycleListenerCollection

public RequestCycleListenerCollection()

Method Details

onBeginRequest

public void onBeginRequest(RequestCycle cycle)

Notifies all registered listeners of the onBeginRequest event in first in first out order, i.e. the listener that is the first element of this collection is the first listener to be notified of onBeginRequest.

Specified by:

onBeginRequest in interface IRequestCycleListener

onEndRequest

public void onEndRequest(RequestCycle cycle)

Notifies all registered listeners of the onEndRequest event in first in last out order (i.e. the last listener that received an #onBeginRequest will be the first to get notified of an onEndRequest.

Specified by:

onEndRequest in interface IRequestCycleListener

See Also:

• IRequestCycleListener.onEndRequest(RequestCycle)

onDetach

public void onDetach(RequestCycle cycle)

Notifies all registered listeners of the onDetach event in first in last out order (i.e. the last listener that received an #onBeginRequest will be the first to get notified of an onDetach.

Specified by:

onDetach in interface IRequestCycleListener

See Also:

• IRequestCycleListener.onDetach(RequestCycle)

onException

public IRequestHandler onException(RequestCycle cycle,
 Exception ex)

Notifies all registered listeners of the exception and calls the first handler that was returned by the listeners.

Specified by:

onException in interface IRequestCycleListener

Parameters:

cycle - The current request cycle

ex - the exception that was passed in to RequestCycle.handleException(Exception)

Returns:

request handler that will be executed or null if none. If a request handler is returned, it will override any configured exception mapper.

See Also:

• IRequestCycleListener.onException(RequestCycle, Exception)

onRequestHandlerResolved

public void onRequestHandlerResolved(RequestCycle cycle,
 IRequestHandler handler)

Description copied from interface: IRequestCycleListener

Called when an IRequestHandler is resolved and will be executed.

Specified by:

onRequestHandlerResolved in interface IRequestCycleListener

onExceptionRequestHandlerResolved

public void onExceptionRequestHandlerResolved(RequestCycle cycle,
 IRequestHandler handler,
 Exception exception)

Description copied from interface: IRequestCycleListener

Called when an IRequestHandler is resolved for an exception and will be executed.

Specified by:

onExceptionRequestHandlerResolved in interface IRequestCycleListener

onRequestHandlerScheduled

public void onRequestHandlerScheduled(RequestCycle cycle,
 IRequestHandler handler)

Description copied from interface: IRequestCycleListener

Called when a IRequestHandler has been scheduled. Can be called multiple times during a request when new handlers get scheduled for processing.

Specified by:

onRequestHandlerScheduled in interface IRequestCycleListener

See Also:

• RequestCycle.scheduleRequestHandlerAfterCurrent(IRequestHandler)

onRequestHandlerExecuted

public void onRequestHandlerExecuted(RequestCycle cycle,
 IRequestHandler handler)

Description copied from interface: IRequestCycleListener

Called after an IRequestHandler has been executed. If the execution resulted in an exception this method will not be called for that particular IRequestHandler.

Specified by:

onRequestHandlerExecuted in interface IRequestCycleListener

onUrlMapped

public void onUrlMapped(RequestCycle cycle,
 IRequestHandler handler,
 Url url)

Description copied from interface: IRequestCycleListener

Called after a Url is generated for a IRequestHandler. This method can be used to modify generated urls, for example query parameters can be added.

Specified by:

onUrlMapped in interface IRequestCycleListener