com.vaadin.flow.server.communication

Class AtmospherePushConnection

java.lang.Object

com.vaadin.flow.server.communication.AtmospherePushConnection

All Implemented Interfaces:

PushConnection, Serializable

public class AtmospherePushConnection
extends Object
implements PushConnection

A PushConnection implementation using the Atmosphere push support that is by default included in Vaadin.

For internal use only. May be renamed or removed in a future release.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	AtmospherePushConnection.FragmentedMessage Represents a message that can arrive as multiple fragments.
protected static class	AtmospherePushConnection.State

Constructor Summary

Constructors

Constructor and Description
AtmospherePushConnection(UI ui) Creates an instance connected to the given UI.

Method Summary

Modifier and Type	Method and Description
void	connect(org.atmosphere.cpr.AtmosphereResource resource) Associates this AtmospherePushConnection with the given AtmosphereResource representing an established push connection.
void	connectionLost() Called when the connection to the client has been lost.
void	disconnect() Closes the connection.
static void	enableAtmosphereDebugLogging() Internal method used for reconfiguring loggers to show all Atmosphere log messages in the console.
static String	getAtmosphereVersion() Gets the Atmosphere version in use, as reported by Version.getRawVersion().
protected org.atmosphere.cpr.AtmosphereResource	getResource()
protected AtmospherePushConnection.State	getState() Returns the state of this connection.
protected UI	getUI()
boolean	isConnected() Returns whether this connection is currently open.
void	push() Pushes pending state changes and client RPC calls to the client.
void	push(boolean async) Pushes pending state changes and client RPC calls to the client.
protected Reader	receiveMessage(Reader reader) Reads and buffers a (possibly partial) message.
protected void	sendMessage(String message) Sends the given message to the current client.

Methods inherited from class java.lang.Object

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

Constructor Detail

AtmospherePushConnection

public AtmospherePushConnection(UI ui)

Creates an instance connected to the given UI.

Parameters:

ui - the UI to which this connection belongs

Method Detail

getAtmosphereVersion

public static String getAtmosphereVersion()

Gets the Atmosphere version in use, as reported by Version.getRawVersion().

Returns:

the Atmosphere version in use or null if Atmosphere was not found

push

public void push()

Description copied from interface: PushConnection

Pushes pending state changes and client RPC calls to the client. Can be called even if PushConnection.isConnected() is false; the push will be deferred until a connection is available. It is NOT safe to invoke this method if not holding the session lock.

This is internal API; please use UI.push() instead.

Specified by:

push in interface PushConnection

push

public void push(boolean async)

Pushes pending state changes and client RPC calls to the client. If isConnected() is false, defers the push until a connection is established.

Parameters:

async - True if this push asynchronously originates from the server, false if it is a response to a client request.

sendMessage

protected void sendMessage(String message)

Sends the given message to the current client. Cannot be called if isConnected() returns false.

Parameters:

message - The message to send

receiveMessage

protected Reader receiveMessage(Reader reader)
                         throws IOException

Reads and buffers a (possibly partial) message. If a complete message was received, or if the call resulted in the completion of a partially received message, returns a Reader yielding the complete message. Otherwise, returns null.

Parameters:

reader - A Reader from which to read the (partial) message

Returns:

A Reader yielding a complete message or null if the message is not yet complete.

Throws:

IOException - if an IO error occurred

isConnected

public boolean isConnected()

Description copied from interface: PushConnection

Returns whether this connection is currently open.

Specified by:

isConnected in interface PushConnection

Returns:

true if the connection is open, false otherwise

connect

public void connect(org.atmosphere.cpr.AtmosphereResource resource)

Associates this AtmospherePushConnection with the given AtmosphereResource representing an established push connection. If already connected, calls disconnect() first. If there is a deferred push, carries it out via the new connection.

Parameters:

resource - the resource to associate this connection with

getUI

protected UI getUI()

Returns:

the UI associated with this connection.

getResource

protected org.atmosphere.cpr.AtmosphereResource getResource()

Returns:

The AtmosphereResource associated with this connection or null if connection not open.

disconnect

public void disconnect()

Description copied from interface: PushConnection

Closes the connection. Cannot be called if PushConnection.isConnected() is false.

Specified by:

disconnect in interface PushConnection

connectionLost

public void connectionLost()

Called when the connection to the client has been lost.

getState

protected AtmospherePushConnection.State getState()

Returns the state of this connection.

Returns:

the state of this connection

enableAtmosphereDebugLogging

public static void enableAtmosphereDebugLogging()

Internal method used for reconfiguring loggers to show all Atmosphere log messages in the console.