Package org.springframework.web.socket.sockjs.transport.handler

Class XhrPollingTransportHandler

java.lang.Object

org.springframework.web.socket.sockjs.transport.handler.AbstractTransportHandler

org.springframework.web.socket.sockjs.transport.handler.AbstractHttpSendingTransportHandler

org.springframework.web.socket.sockjs.transport.handler.XhrPollingTransportHandler

All Implemented Interfaces:

SockJsSessionFactory, TransportHandler

public class XhrPollingTransportHandler
extends AbstractHttpSendingTransportHandler

A TransportHandler based on XHR (long) polling.

Since:

4.0

Author:

Rossen Stoyanchev

Field Summary

Fields inherited from class org.springframework.web.socket.sockjs.transport.handler.AbstractTransportHandler

logger

Constructor Summary

Constructors

Constructor	Description
XhrPollingTransportHandler()

Method Summary

Modifier and Type	Method	Description
boolean	checkSessionType(SockJsSession session)	Check whether the type of the given session matches the transport type of this TransportHandler where session id and the transport type are extracted from the SockJS URL.
PollingSockJsSession	createSession(String sessionId, WebSocketHandler handler, Map<String,Object> attributes)	Create a new SockJS session.
protected MediaType	getContentType()
protected SockJsFrameFormat	getFrameFormat(ServerHttpRequest request)
TransportType	getTransportType()	Return the transport type supported by this handler.

Methods inherited from class org.springframework.web.socket.sockjs.transport.handler.AbstractHttpSendingTransportHandler

getCallbackParam, handleRequest, handleRequestInternal

Methods inherited from class org.springframework.web.socket.sockjs.transport.handler.AbstractTransportHandler

getServiceConfig, initialize

Methods inherited from class java.lang.Object

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

Constructor Details

XhrPollingTransportHandler

public XhrPollingTransportHandler()

Method Details

getTransportType

public TransportType getTransportType()

Description copied from interface: TransportHandler

Return the transport type supported by this handler.

getContentType

protected MediaType getContentType()

Specified by:

getContentType in class AbstractHttpSendingTransportHandler

getFrameFormat

protected SockJsFrameFormat getFrameFormat(ServerHttpRequest request)

Specified by:

getFrameFormat in class AbstractHttpSendingTransportHandler

checkSessionType

public boolean checkSessionType(SockJsSession session)

Description copied from interface: TransportHandler

Check whether the type of the given session matches the transport type of this TransportHandler where session id and the transport type are extracted from the SockJS URL.

Returns:

true if the session matches (and would therefore get accepted by TransportHandler.handleRequest(org.springframework.http.server.ServerHttpRequest, org.springframework.http.server.ServerHttpResponse, org.springframework.web.socket.WebSocketHandler, org.springframework.web.socket.sockjs.transport.SockJsSession)), or false otherwise

createSession

public PollingSockJsSession createSession(String sessionId,
 WebSocketHandler handler,
 Map<String,Object> attributes)

Description copied from interface: SockJsSessionFactory

Create a new SockJS session.

Parameters:

sessionId - the ID of the session

handler - the underlying WebSocketHandler

attributes - handshake request specific attributes

Returns:

a new session, never null