Module org.apache.wicket.core

Package org.apache.wicket.ajax

Class AbstractAjaxTimerBehavior

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.behavior.AbstractAjaxBehavior

org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

org.apache.wicket.ajax.AbstractAjaxTimerBehavior

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IRequestListener, IComponentAwareHeaderContributor, IClusterable

Direct Known Subclasses:

AjaxClientInfoBehavior, AjaxLazyLoadPanel.AjaxLazyLoadTimer, AjaxSelfUpdatingTimerBehavior

public abstract class AbstractAjaxTimerBehavior
extends AbstractDefaultAjaxBehavior

A behavior that generates an AJAX update callback at a regular interval.

Since:

1.2

Author:

Igor Vaynberg (ivaynberg)

See Also:

• onTimer(AjaxRequestTarget)
• restart(IPartialPageRequestHandler)
• stop(IPartialPageRequestHandler)
• Serialized Form

Field Summary

Fields inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

INDICATOR

Constructor Summary

Constructors

Constructor	Description
AbstractAjaxTimerBehavior(Duration updateInterval)	Construct.

Method Summary

Modifier and Type	Method	Description
protected String	getTimerId()	Create an identifier for the JavaScript timer.
final Duration	getUpdateInterval()	Returns the update interval
final boolean	isStopped()
void	onRemove(Component component)	Called to notify that the component is being removed from its parent
static AbstractAjaxTimerBehavior	onTimer(Duration interval, org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onTimer)	Creates an AbstractAjaxTimerBehavior based on lambda expressions
protected abstract void	onTimer(AjaxRequestTarget target)	Listener method for the AJAX timer event.
protected void	onUnbind()	Called when the behavior is removed from its component.
void	renderHead(Component component, IHeaderResponse response)	Render to the web response whatever the component wants to contribute to the head section.
protected final void	respond(AjaxRequestTarget target)
final void	restart(IPartialPageRequestHandler target)	Restart the timer.
protected final void	setUpdateInterval(Duration updateInterval)	Sets the update interval duration.
protected boolean	shouldTrigger()	Decides whether the timer behavior should render its JavaScript to re-trigger it after the update interval.
final void	stop(IPartialPageRequestHandler target)	Stops the timer.

Methods inherited from class org.apache.wicket.ajax.AbstractDefaultAjaxBehavior

findIndicatorId, getAttributes, getCallbackFunction, getCallbackFunctionBody, getCallbackScript, getCallbackScript, onBind, onMethodMismatch, onRequest, postprocessConfiguration, renderAjaxAttributes, renderAjaxAttributes, updateAjaxAttributes

Methods inherited from class org.apache.wicket.behavior.AbstractAjaxBehavior

afterRender, bind, getCallbackUrl, getComponent, onComponentRendered, onComponentTag, onComponentTag, unbind

Methods inherited from class org.apache.wicket.behavior.Behavior

beforeRender, canCallListener, detach, getStatelessHint, isEnabled, isTemporary, onAttribute, onConfigure, onEvent, onException, onTag

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wicket.IRequestListener

rendersPage

Constructor Details

AbstractAjaxTimerBehavior

public AbstractAjaxTimerBehavior(Duration updateInterval)

Construct.

Parameters:

updateInterval - Duration between AJAX callbacks

Method Details

setUpdateInterval

protected final void setUpdateInterval(Duration updateInterval)

Sets the update interval duration. This method should only be called within the onTimer(AjaxRequestTarget) method.

Parameters:

updateInterval -

getUpdateInterval

public final Duration getUpdateInterval()

Returns the update interval

Returns:

The update interval

renderHead

public void renderHead(Component component,
 IHeaderResponse response)

Description copied from class: Behavior

Render to the web response whatever the component wants to contribute to the head section.

Specified by:

renderHead in interface IComponentAwareHeaderContributor

Overrides:

renderHead in class AbstractDefaultAjaxBehavior

Parameters:

component - component which is contributing to the response. This parameter is here to give the component as the context for component-awares implementing this interface

response - Response object

See Also:

• Behavior.renderHead(Component, org.apache.wicket.markup.head.IHeaderResponse)

respond

protected final void respond(AjaxRequestTarget target)

Specified by:

respond in class AbstractDefaultAjaxBehavior

Parameters:

target - The AJAX target

shouldTrigger

protected boolean shouldTrigger()

Decides whether the timer behavior should render its JavaScript to re-trigger it after the update interval.

Returns:

true if the behavior is not stopped, it is enabled and still attached to any component in the page or to the page itself

onTimer

protected abstract void onTimer(AjaxRequestTarget target)

Listener method for the AJAX timer event.

Parameters:

target - The request target

isStopped

public final boolean isStopped()

Returns:

true if has been stopped via stop(IPartialPageRequestHandler)

restart

public final void restart(IPartialPageRequestHandler target)

Restart the timer.

Parameters:

target - may be null

getTimerId

protected String getTimerId()

Create an identifier for the JavaScript timer.

Note: The identifier must not change as long as this behavior is attached to a component!

Returns:

creates an id based on Component.getMarkupId() and Component.getBehaviorById(int) by default

stop

public final void stop(IPartialPageRequestHandler target)

Stops the timer.

Parameters:

target - may be null

onRemove

public void onRemove(Component component)

Description copied from class: Behavior

Called to notify that the component is being removed from its parent

Overrides:

onRemove in class Behavior

Parameters:

component - the removed component

onUnbind

protected void onUnbind()

Description copied from class: AbstractAjaxBehavior

Called when the behavior is removed from its component. The bound host component is still available through AbstractAjaxBehavior.getComponent(). The relation to it will be removed right after the finish of the execution of this method.

Overrides:

onUnbind in class AbstractAjaxBehavior

onTimer

public static AbstractAjaxTimerBehavior onTimer(Duration interval,
 org.danekja.java.util.function.serializable.SerializableConsumer<AjaxRequestTarget> onTimer)

Creates an AbstractAjaxTimerBehavior based on lambda expressions

Parameters:

interval - the interval the timer

onTimer - the consumer which accepts the AjaxRequestTarget

Returns:

the AbstractAjaxTimerBehavior