com.vaadin.client.communication

Class MessageSender

java.lang.Object

com.vaadin.client.communication.MessageSender

public class MessageSender
extends Object

MessageSender is responsible for sending messages to the server.

Internally uses XhrConnection and/or PushConnection for delivering messages, depending on the application configuration.

Since:

7.6

Author:

Vaadin Ltd

Constructor Summary

Constructors

Constructor and Description
MessageSender()

Method Summary

Modifier and Type	Method and Description
void	endRequest()
static void	extendLiferaySession() If on Liferay and logged in, ask the client side session management JavaScript to extend the session duration.
String	getCommunicationMethodName() Returns a human readable string representation of the method used to communicate with the server.
boolean	hasActiveRequest() Indicates whether or not there are currently active UIDL requests.
void	resynchronize() Resynchronize the client side, i.e.
static void	runPostRequestHooks(String appId) Runs possibly registered client side post request hooks.
protected void	send(elemental.json.JsonArray reqInvocations, elemental.json.JsonObject extraJson) Makes an UIDL request to the server.
void	send(elemental.json.JsonObject payload) Sends an asynchronous or synchronous UIDL request to the server using the given URI.
void	sendInvocationsToServer()
void	setClientToServerMessageId(int nextExpectedId, boolean force) Used internally to update what the server expects.
void	setConnection(ApplicationConnection connection) Sets the application connection this instance is connected to.
void	setPushEnabled(boolean enabled) Sets the status for the push connection.
void	startRequest()

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageSender

public MessageSender()

Method Detail

setConnection

public void setConnection(ApplicationConnection connection)

Sets the application connection this instance is connected to. Called internally by the framework.

Parameters:

connection - the application connection this instance is connected to

sendInvocationsToServer

public void sendInvocationsToServer()

send

protected void send(elemental.json.JsonArray reqInvocations,
                    elemental.json.JsonObject extraJson)

Makes an UIDL request to the server.

Parameters:

reqInvocations - Data containing RPC invocations and all related information.

extraJson - The JsonObject whose parameters are added to the payload

send

public void send(elemental.json.JsonObject payload)

Sends an asynchronous or synchronous UIDL request to the server using the given URI.

Parameters:

payload - The contents of the request to send

setPushEnabled

public void setPushEnabled(boolean enabled)

Sets the status for the push connection.

Parameters:

enabled - true to enable the push connection; false to disable the push connection.

startRequest

public void startRequest()

endRequest

public void endRequest()

runPostRequestHooks

public static void runPostRequestHooks(String appId)

Runs possibly registered client side post request hooks. This is expected to be run after each uidl request made by Vaadin application.

Parameters:

appId -

extendLiferaySession

public static void extendLiferaySession()

If on Liferay and logged in, ask the client side session management JavaScript to extend the session duration. Otherwise, Liferay client side JavaScript will explicitly expire the session even though the server side considers the session to be active. See ticket #8305 for more information.

hasActiveRequest

public boolean hasActiveRequest()

Indicates whether or not there are currently active UIDL requests. Used internally to sequence requests properly, seldom needed in Widgets.

Returns:

true if there are active requests

getCommunicationMethodName

public String getCommunicationMethodName()

Returns a human readable string representation of the method used to communicate with the server.

Returns:

A string representation of the current transport type

resynchronize

public void resynchronize()

Resynchronize the client side, i.e. reload all component hierarchy and state from the server

setClientToServerMessageId

public void setClientToServerMessageId(int nextExpectedId,
                                       boolean force)

Used internally to update what the server expects.

Parameters:

nextExpectedId - the new client id to set

force - true if the id must be updated, false otherwise