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

All Methods Instance Methods Concrete Methods
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 Detail
  - XhrPollingTransportHandler
```
public XhrPollingTransportHandler()
```
- Method Detail
  - 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

Class XhrPollingTransportHandler

Field Summary

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

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Constructor Detail

XhrPollingTransportHandler

Method Detail

getTransportType

getContentType

getFrameFormat

checkSessionType

createSession