org.springframework.web.socket.client.jetty

Class JettyWebSocketClient

java.lang.Object

org.springframework.web.socket.client.AbstractWebSocketClient

org.springframework.web.socket.client.jetty.JettyWebSocketClient

All Implemented Interfaces:

Lifecycle, Phased, SmartLifecycle, WebSocketClient

public class JettyWebSocketClient
extends AbstractWebSocketClient
implements SmartLifecycle

Initiates WebSocket requests to a WebSocket server programmatically through the Jetty WebSocket API.

Since:

4.0

Author:

Rossen Stoyanchev

Field Summary

Fields inherited from class org.springframework.web.socket.client.AbstractWebSocketClient

logger

Constructor Summary

Constructors

Constructor and Description
JettyWebSocketClient() Default constructor that creates an instance of WebSocketClient.
JettyWebSocketClient(org.eclipse.jetty.websocket.client.WebSocketClient client) Constructor that accepts an existing WebSocketClient instance.

Method Summary

Modifier and Type	Method and Description
ListenableFuture<WebSocketSession>	doHandshake(WebSocketHandler webSocketHandler, String uriTemplate, Object... uriVars)
ListenableFuture<WebSocketSession>	doHandshakeInternal(WebSocketHandler wsHandler, HttpHeaders headers, URI uri, List<String> protocols, List<WebSocketExtension> extensions, Map<String,Object> attributes) Perform the actual handshake to establish a connection to the server.
int	getPhase() Return the phase value of this object.
AsyncListenableTaskExecutor	getTaskExecutor() Return the configured TaskExecutor.
protected Principal	getUser()
boolean	isAutoStartup() Return whether this Lifecycle component should be started automatically by the container when the ApplicationContext is refreshed.
boolean	isRunning() Check whether this component is currently running.
void	setAutoStartup(boolean autoStartup)
void	setPhase(int phase)
void	setTaskExecutor(AsyncListenableTaskExecutor taskExecutor) Set an AsyncListenableTaskExecutor to use when opening connections.
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	stop(Runnable callback) Indicates that a Lifecycle component must stop if it is currently running.

Methods inherited from class org.springframework.web.socket.client.AbstractWebSocketClient

doHandshake

Methods inherited from class java.lang.Object

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

Constructor Detail

JettyWebSocketClient

public JettyWebSocketClient()

Default constructor that creates an instance of WebSocketClient.

JettyWebSocketClient

public JettyWebSocketClient(org.eclipse.jetty.websocket.client.WebSocketClient client)

Constructor that accepts an existing WebSocketClient instance.

Method Detail

setTaskExecutor

public void setTaskExecutor(AsyncListenableTaskExecutor taskExecutor)

Set an AsyncListenableTaskExecutor to use when opening connections.

If this property is not configured, calls to any of the doHandshake methods will block until the connection is established.

getTaskExecutor

public AsyncListenableTaskExecutor getTaskExecutor()

Return the configured TaskExecutor.

setAutoStartup

public void setAutoStartup(boolean autoStartup)

isAutoStartup

public boolean isAutoStartup()

Description copied from interface: SmartLifecycle

Return whether this Lifecycle component should be started automatically by the container when the ApplicationContext is refreshed. A value of "false" indicates that the component is intended to be started manually.

Specified by:

isAutoStartup in interface SmartLifecycle

setPhase

public void setPhase(int phase)

getPhase

public int getPhase()

Description copied from interface: Phased

Return the phase value of this object.

Specified by:

getPhase in interface Phased

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

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 in cases where asynchronous stop behavior is necessary.

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)

stop

public void stop(Runnable callback)

Description copied from interface: SmartLifecycle

Indicates that a Lifecycle component must stop if it is currently running.

The provided callback is used by the LifecycleProcessor to support an ordered, and potentially concurrent, shutdown of all components having a common shutdown order value. The callback must be executed after the SmartLifecycle component does indeed stop.

The LifecycleProcessor will call only this variant of the stop method; i.e. Lifecycle.stop() will not be called for SmartLifecycle implementations unless explicitly delegated to within this method.

Specified by:

stop in interface SmartLifecycle

doHandshake

public ListenableFuture<WebSocketSession> doHandshake(WebSocketHandler webSocketHandler,
                                                      String uriTemplate,
                                                      Object... uriVars)

Specified by:

doHandshake in interface WebSocketClient

Overrides:

doHandshake in class AbstractWebSocketClient

doHandshakeInternal

public ListenableFuture<WebSocketSession> doHandshakeInternal(WebSocketHandler wsHandler,
                                                              HttpHeaders headers,
                                                              URI uri,
                                                              List<String> protocols,
                                                              List<WebSocketExtension> extensions,
                                                              Map<String,Object> attributes)

Description copied from class: AbstractWebSocketClient

Perform the actual handshake to establish a connection to the server.

Specified by:

doHandshakeInternal in class AbstractWebSocketClient

Parameters:

wsHandler - the client-side handler for WebSocket messages

headers - HTTP headers to use for the handshake, with unwanted (forbidden) headers filtered out, never null

uri - the target URI for the handshake, never null

protocols - requested sub-protocols, or an empty list

extensions - requested WebSocket extensions, or an empty list

attributes - attributes to associate with the WebSocketSession, i.e. via WebSocketSession.getAttributes(); currently always an empty map.

Returns:

the established WebSocket session wrapped in a ListenableFuture.

getUser

protected Principal getUser()

Returns:

the user to make available through WebSocketSession.getPrincipal(); by default this method returns null