alma.acs.eventbrowser.handlers

Class PeriodicRefreshHandler

java.lang.Object

alma.acs.eventbrowser.handlers.PeriodicRefreshHandler

public class PeriodicRefreshHandler
extends java.lang.Object

Handler for the toggling of the various popup/part menu items that control periodic refreshing of the notify service data.

Field Summary

Fields

Modifier and Type	Field and Description
int	refreshDelaySeconds

Constructor Summary

Constructors

Constructor and Description
PeriodicRefreshHandler()

Method Summary

Modifier and Type	Method and Description
boolean	canExecute(MHandledItem handledItem) Always returns true, since only CHECK menu items are expected to trigger the call, and they get selected or unselected but always are enabled.
void	dispose()
void	execute(MHandledItem handledItem) Starts a NotifyServiceUpdateJob with 10 seconds refresh period, which will notify the interested parts via the IEventBroker.
void	init()

Methods inherited from class java.lang.Object

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

Field Detail

refreshDelaySeconds

public final int refreshDelaySeconds

See Also:

Constant Field Values

Constructor Detail

PeriodicRefreshHandler

public PeriodicRefreshHandler()

Method Detail

init

@PostConstruct
public void init()

canExecute

public boolean canExecute(MHandledItem handledItem)

Always returns true, since only CHECK menu items are expected to trigger the call, and they get selected or unselected but always are enabled.

Hack: We abuse this method to 'harvest' all relevant menu items in menuItemsToSync, so that we can later synchronize their selection state (all checked or unchecked). See http://www.eclipse.org/forums/index.php/t/442970/ and http://www.eclipse.org/forums/index.php/t/444326/ and http://comments.gmane.org/gmane.comp.ide.eclipse.e4.devel/7870 about alternative workarounds, that I found not working or uglier than this harvesting. There it also explains why EModelService#findElements is not working for menu items, and other current limitations of E4 like not having a HandlerUtil class to sync stateful menu items. I believe that having moved the menu items away from the java code into the e4xmi file, there should also be a declarative way to form synchronization groups of stateful menu items.

execute

public void execute(MHandledItem handledItem)

Starts a NotifyServiceUpdateJob with 10 seconds refresh period, which will notify the interested parts via the IEventBroker.

An alternative implementation could get parameter @Active MPart part injected and notify the part directly, without IEventBroker.

dispose

@PreDestroy
public void dispose()