org.springframework.web.socket.server.jetty

Class JettyRequestUpgradeStrategy

java.lang.Object

org.springframework.web.socket.server.jetty.JettyRequestUpgradeStrategy

All Implemented Interfaces:

RequestUpgradeStrategy

public class JettyRequestUpgradeStrategy
extends Object
implements RequestUpgradeStrategy

RequestUpgradeStrategy for use with Jetty 9. Based on Jetty's internal org.eclipse.jetty.websocket.server.WebSocketHandler class.

Since:

4.0

Author:

Phillip Webb, Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
JettyRequestUpgradeStrategy() Default constructor that creates WebSocketServerFactory through its default constructor thus using a default WebSocketPolicy.
JettyRequestUpgradeStrategy(org.eclipse.jetty.websocket.server.WebSocketServerFactory factory) A constructor accepting a WebSocketServerFactory.

Method Summary

Modifier and Type	Method and Description
List<WebSocketExtension>	getSupportedExtensions(ServerHttpRequest request)
String[]	getSupportedVersions() Return the supported WebSocket protocol versions.
void	upgrade(ServerHttpRequest request, ServerHttpResponse response, String selectedProtocol, List<WebSocketExtension> selectedExtensions, Principal user, WebSocketHandler wsHandler, Map<String,Object> attributes) Perform runtime specific steps to complete the upgrade.

Methods inherited from class java.lang.Object

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

Constructor Detail

JettyRequestUpgradeStrategy

public JettyRequestUpgradeStrategy()

Default constructor that creates WebSocketServerFactory through its default constructor thus using a default WebSocketPolicy.

JettyRequestUpgradeStrategy

public JettyRequestUpgradeStrategy(org.eclipse.jetty.websocket.server.WebSocketServerFactory factory)

A constructor accepting a WebSocketServerFactory. This may be useful for modifying the factory's WebSocketPolicy via WebSocketServerFactory.getPolicy().

Method Detail

getSupportedVersions

public String[] getSupportedVersions()

Description copied from interface: RequestUpgradeStrategy

Return the supported WebSocket protocol versions.

Specified by:

getSupportedVersions in interface RequestUpgradeStrategy

getSupportedExtensions

public List<WebSocketExtension> getSupportedExtensions(ServerHttpRequest request)

Specified by:

getSupportedExtensions in interface RequestUpgradeStrategy

Returns:

the WebSocket protocol extensions supported by the underlying WebSocket server.

upgrade

public void upgrade(ServerHttpRequest request,
                    ServerHttpResponse response,
                    String selectedProtocol,
                    List<WebSocketExtension> selectedExtensions,
                    Principal user,
                    WebSocketHandler wsHandler,
                    Map<String,Object> attributes)
             throws HandshakeFailureException

Description copied from interface: RequestUpgradeStrategy

Perform runtime specific steps to complete the upgrade. Invoked after successful negotiation of the handshake request.

Specified by:

upgrade in interface RequestUpgradeStrategy

Parameters:

request - the current request

response - the current response

selectedProtocol - the selected sub-protocol, if any

selectedExtensions - the selected WebSocket protocol extensions

user - the user to associate with the WebSocket session

wsHandler - the handler for WebSocket messages

attributes - handshake request specific attributes to be set on the WebSocket session via HandshakeInterceptor and thus made available to the WebSocketHandler;

Throws:

HandshakeFailureException - thrown when handshake processing failed to complete due to an internal, unrecoverable error, i.e. a server error as opposed to a failure to successfully negotiate the requirements of the handshake request.