Package de.xima.fc.gui.common.bean.push

Class BackendPushContextBean

java.lang.Object

de.xima.fc.gui.common.bean.push.BackendPushContextBean

All Implemented Interfaces:

Serializable

@Named
@Dependent
public class BackendPushContextBean
extends Object
implements Serializable

Bean with the action listener for the AjaxCallPushData.getActionListener().

Since:

7.0.0

Author:

XIMA MEDIA GmbH

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BackendPushContextBean.ApplicationOmniFacesPushKeepAliveCheck	Keepalive check for the OmniFaces socket, with a mutex scoped to the current application.
static class	BackendPushContextBean.SessionOmniFacesPushKeepAliveCheck	Keepalive check for the OmniFaces socket, with a mutex scoped to the current session.
static class	BackendPushContextBean.ViewOmniFacesPushKeepAliveCheck	Keepalive check for the OmniFaces socket, with a mutex scoped to the current view.

Constructor Summary

Constructors

Constructor	Description
BackendPushContextBean()

Method Summary

Modifier and Type	Method	Description
long	getWebSocketKeepAliveIntervalMillis()	Interval for the websocket keep alive interval, in milliseconds.
long	getWebSocketKeepAliveIntervalSeconds()	Interval for the websocket keep alive interval, in seconds.
void	handleDefaultAjaxCall(javax.faces.event.ActionEvent event)	Action listener called by the default AJAX call push data source.
void	handleOmniFacesKeepAliveRequest()	Handles the keep alive request for the OmniFaces web socket.

Methods inherited from class java.lang.Object

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

Constructor Details

BackendPushContextBean

public BackendPushContextBean()

Method Details

handleDefaultAjaxCall

public void handleDefaultAjaxCall(javax.faces.event.ActionEvent event)

Action listener called by the default AJAX call push data source.

Parameters:

event - Action event that occurred.

handleOmniFacesKeepAliveRequest

public void handleOmniFacesKeepAliveRequest()

Handles the keep alive request for the OmniFaces web socket. The OmniFaces socket is unidirectional, we can only send messages from the server to the server. In additional, we need access to the view scope to send messages. As such, we use the following approach: Each client makes a POSTBACK request regularly in a defined interval, calling this hander method. This method then send a ping message to keep the websocket alive.

Note: This handler is invoked in regular intervals by each view scope. That is, when multiple view (from possibly different users) exist, this handler is called many times. We need to ensure that we do not spam users by sending session and application ping messages for each request from a view scope.

getWebSocketKeepAliveIntervalMillis

public long getWebSocketKeepAliveIntervalMillis()

Interval for the websocket keep alive interval, in milliseconds.

Returns:

The websocket keep alive interval, in milliseconds.

getWebSocketKeepAliveIntervalSeconds

public long getWebSocketKeepAliveIntervalSeconds()

Interval for the websocket keep alive interval, in seconds.

Returns:

The websocket keep alive interval, in seconds.