org.springframework.web.socket.client.standard

Class StandardWebSocketClient

java.lang.Object

org.springframework.web.socket.client.AbstractWebSocketClient

org.springframework.web.socket.client.standard.StandardWebSocketClient

All Implemented Interfaces:

WebSocketClient

public class StandardWebSocketClient
extends AbstractWebSocketClient

A WebSocketClient based on standard Java 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
StandardWebSocketClient() Default constructor that calls ContainerProvider.getWebSocketContainer() to obtain a (new) WebSocketContainer instance.
StandardWebSocketClient(javax.websocket.WebSocketContainer webSocketContainer) Constructor accepting an existing WebSocketContainer instance.

Method Summary

Modifier and Type	Method and Description
protected ListenableFuture<WebSocketSession>	doHandshakeInternal(WebSocketHandler webSocketHandler, HttpHeaders headers, java.net.URI uri, java.util.List<java.lang.String> protocols, java.util.List<WebSocketExtension> extensions, java.util.Map<java.lang.String,java.lang.Object> attributes) Perform the actual handshake to establish a connection to the server.
AsyncListenableTaskExecutor	getTaskExecutor() Return the configured TaskExecutor.
java.util.Map<java.lang.String,java.lang.Object>	getUserProperties() The configured user properties.
void	setTaskExecutor(AsyncListenableTaskExecutor taskExecutor) Set an AsyncListenableTaskExecutor to use when opening connections.
void	setUserProperties(java.util.Map<java.lang.String,java.lang.Object> userProperties) The standard Java WebSocket API allows passing "user properties" to the server via userProperties.

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

assertUri, doHandshake, doHandshake

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardWebSocketClient

public StandardWebSocketClient()

Default constructor that calls ContainerProvider.getWebSocketContainer() to obtain a (new) WebSocketContainer instance. Also see constructor accepting existing WebSocketContainer instance.

StandardWebSocketClient

public StandardWebSocketClient(javax.websocket.WebSocketContainer webSocketContainer)

Constructor accepting an existing WebSocketContainer instance.

For XML configuration, see WebSocketContainerFactoryBean. For Java configuration, use ContainerProvider.getWebSocketContainer() to obtain the WebSocketContainer instance.

Method Detail

setUserProperties

public void setUserProperties(@Nullable
                              java.util.Map<java.lang.String,java.lang.Object> userProperties)

The standard Java WebSocket API allows passing "user properties" to the server via userProperties. Use this property to configure one or more properties to be passed on every handshake.

getUserProperties

public java.util.Map<java.lang.String,java.lang.Object> getUserProperties()

The configured user properties.

setTaskExecutor

public void setTaskExecutor(@Nullable
                            AsyncListenableTaskExecutor taskExecutor)

Set an AsyncListenableTaskExecutor to use when opening connections. If this property is set to null, calls to any of the doHandshake methods will block until the connection is established.

By default, an instance of SimpleAsyncTaskExecutor is used.

getTaskExecutor

@Nullable
public AsyncListenableTaskExecutor getTaskExecutor()

Return the configured TaskExecutor.

doHandshakeInternal

protected ListenableFuture<WebSocketSession> doHandshakeInternal(WebSocketHandler webSocketHandler,
                                                                 HttpHeaders headers,
                                                                 java.net.URI uri,
                                                                 java.util.List<java.lang.String> protocols,
                                                                 java.util.List<WebSocketExtension> extensions,
                                                                 java.util.Map<java.lang.String,java.lang.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:

webSocketHandler - 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.