org.springframework.web.socket.server.jetty

Class JettyRequestUpgradeStrategy

java.lang.Object

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

All Implemented Interfaces:

Aware, Lifecycle, ServletContextAware, RequestUpgradeStrategy

public class JettyRequestUpgradeStrategy
extends Object
implements RequestUpgradeStrategy, Lifecycle, ServletContextAware

A RequestUpgradeStrategy for use with Jetty 9.0-9.3. 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) Return the WebSocket protocol extensions supported by the underlying WebSocket server.
String[]	getSupportedVersions() Return the supported WebSocket protocol versions.
boolean	isRunning() Check whether this component is currently running.
void	setServletContext(ServletContext servletContext) Set the ServletContext that this object runs in.
void	start() Start this component.
void	stop() Stop this component, typically in a synchronous fashion, such that the component is fully stopped upon return of this method.
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)

Description copied from interface: RequestUpgradeStrategy

Return the WebSocket protocol extensions supported by the underlying WebSocket server.

Specified by:

getSupportedExtensions in interface RequestUpgradeStrategy

setServletContext

public void setServletContext(ServletContext servletContext)

Description copied from interface: ServletContextAware

Set the ServletContext that this object runs in.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked after ApplicationContextAware's setApplicationContext.

Specified by:

setServletContext in interface ServletContextAware

Parameters:

servletContext - ServletContext object to be used by this object

See Also:

InitializingBean.afterPropertiesSet(), ApplicationContextAware.setApplicationContext(org.springframework.context.ApplicationContext)

isRunning

public boolean isRunning()

Description copied from interface: Lifecycle

Check whether this component is currently running.

In the case of a container, this will return true only if all components that apply are currently running.

Specified by:

isRunning in interface Lifecycle

Returns:

whether the component is currently running

start

public void start()

Description copied from interface: Lifecycle

Start this component.

Should not throw an exception if the component is already running.

In the case of a container, this will propagate the start signal to all components that apply.

Specified by:

start in interface Lifecycle

See Also:

SmartLifecycle.isAutoStartup()

stop

public void stop()

Description copied from interface: Lifecycle

Stop this component, typically in a synchronous fashion, such that the component is fully stopped upon return of this method. Consider implementing SmartLifecycle and its stop(Runnable) variant when asynchronous stop behavior is necessary.

Note that this stop notification is not guaranteed to come before destruction: On regular shutdown, Lifecycle beans will first receive a stop notification before the general destruction callbacks are being propagated; however, on hot refresh during a context's lifetime or on aborted refresh attempts, only destroy methods will be called.

Should not throw an exception if the component isn't started yet.

In the case of a container, this will propagate the stop signal to all components that apply.

Specified by:

stop in interface Lifecycle

See Also:

SmartLifecycle.stop(Runnable), DisposableBean.destroy()

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.