Package org.zkoss.zk.ui.event.impl

Class EventQueueProviderImpl

java.lang.Object

org.zkoss.zk.ui.event.impl.EventQueueProviderImpl

All Implemented Interfaces:

EventQueueProvider

public class EventQueueProviderImpl
extends Object
implements EventQueueProvider

A simple implementation of EventQueueProvider.

Since:

5.0.0

Author:

tomyeh

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	ATTR_EVENT_QUEUES	The attribute used to store the map of event queues.

Constructor Summary

Constructors

Constructor	Description
EventQueueProviderImpl()

Method Summary

Modifier and Type	Method	Description
<T extends Event> EventQueue<T>	lookup(String name, String scope, boolean autoCreate)	Returns the event queue with the specified name in the specified scope.
<T extends Event> EventQueue<T>	lookup(String name, Session sess, boolean autoCreate)	Returns the event queue with the specified name in the give session (i.e., the scope).
<T extends Event> EventQueue<T>	lookup(String name, WebApp wapp, boolean autoCreate)	Returns the event queue with the specified name in the give application (i.e., the scope).
boolean	remove(String name, String scope)	Removes the event queue.
boolean	remove(String name, Session sess)	Removes the event queue of the specified session.
boolean	remove(String name, WebApp wapp)	Removes the event queue of the specified application.

Methods inherited from class java.lang.Object

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

Field Details

ATTR_EVENT_QUEUES

protected static final String ATTR_EVENT_QUEUES

The attribute used to store the map of event queues.

See Also:

• Constant Field Values

Constructor Details

EventQueueProviderImpl

public EventQueueProviderImpl()

Method Details

lookup

public <T extends Event> EventQueue<T> lookup(String name,
 String scope,
 boolean autoCreate)

Description copied from interface: EventQueueProvider

Returns the event queue with the specified name in the specified scope.

Note:

• This method can be called only in an activated execution, i.e., Executions.getCurrent() not null.
• By default, EventQueueProviderImpl is used. To customize it, refer to EventQueues.

Specified by:

lookup in interface EventQueueProvider

Parameters:

name - the name of the event queue.

scope - the scope of the event queue. It must support EventQueues.DESKTOP and EventQueues.APPLICATION. Developers might extend it to support other types of event queues.

autoCreate - whether to create the event queue if not found.

Returns:

the event queue with the associated name, or null if not found and autoCreate is false

lookup

public <T extends Event> EventQueue<T> lookup(String name,
 Session sess,
 boolean autoCreate)

Description copied from interface: EventQueueProvider

Returns the event queue with the specified name in the give session (i.e., the scope).

Unlike EventQueueProvider.lookup(String, String, boolean), this method can be called without an activated execution.

Specified by:

lookup in interface EventQueueProvider

sess - the session that the event queue is located (i.e., the scope)

lookup

public <T extends Event> EventQueue<T> lookup(String name,
 WebApp wapp,
 boolean autoCreate)

Description copied from interface: EventQueueProvider

Returns the event queue with the specified name in the give application (i.e., the scope).

Unlike EventQueueProvider.lookup(String, String, boolean), this method can be called without an activated execution.

Specified by:

lookup in interface EventQueueProvider

wapp - the Web application that the event queue is located (i.e., the scope)

remove

public boolean remove(String name,
 String scope)

Description copied from interface: EventQueueProvider

Removes the event queue.

Specified by:

remove in interface EventQueueProvider

Parameters:

name - the name of the event queue.

scope - the scope of the event queue. It must support EventQueues.DESKTOP and EventQueues.APPLICATION. Developers might extend it to support other types of event queues.

Returns:

true if it is removed successfully

remove

public boolean remove(String name,
 Session sess)

Description copied from interface: EventQueueProvider

Removes the event queue of the specified session.

Unlike EventQueueProvider.remove(String, String), this method can be called without an activated execution.

Specified by:

remove in interface EventQueueProvider

Parameters:

name - the queue name.

sess - the session that the event queue is located (i.e., the session scope)

Returns:

true if it is removed successfully

remove

public boolean remove(String name,
 WebApp wapp)

Description copied from interface: EventQueueProvider

Removes the event queue of the specified application.

Unlike EventQueueProvider.remove(String, String), this method can be called without an activated execution.

Specified by:

remove in interface EventQueueProvider

Parameters:

name - the queue name.

wapp - the Web application that the event queue is located (i.e., the application scope)

Returns:

true if it is removed successfully