[英]How to config spring-websocket with 'WebApplicationInitializer'
[英]How to correctly implement a spring-websocket java client
我正在為我的WebSocket服務器開發一個Spring WebSocket Stomp Client,我收到了相互矛盾的信息。 我找到了兩種方法讓它工作,而沒有太多細節我想知道哪種方式被認為是實現客戶端的“正確”方式。
有人可以幫我理解WebSocketConnectionManager的用途嗎?
另外,還有一個問題,我如何保持websocket連接打開,程序運行以接受新消息,而不必編寫System.in.read()行。
第一種方式:直接使用SockJsClient
URI uri = new URI("ws://localhost:8080/stomp");
StandardWebSocketClient simpleWebSocketClient = new StandardWebSocketClient();
List<Transport> transports = new ArrayList<>(1);
transports.add(new WebSocketTransport(simpleWebSocketClient));
SockJsClient sockJsClient = new SockJsClient(transports);
sockJsClient.setMessageCodec(new Jackson2SockJsMessageCodec());
StompMessageReceiver messageHandler = new StompMessageReceiver();
StompWebSocketHandler websocketHandler = new StompWebSocketHandler(messageHandler, new StringMessageConverter());
try {
this.webSocketClient.doHandshake(websocketHandler, null, uri).get();
} catch (InterruptedException | ExecutionException e) {
throw new IllegalStateException(e);
}
System.in.read();
第二種方式:使用WebSocketConnectionManager
StandardWebSocketClient simpleWebSocketClient = new StandardWebSocketClient();
List<Transport> transports = new ArrayList<>(1);
transports.add(new WebSocketTransport(simpleWebSocketClient));
SockJsClient sockJsClient = new SockJsClient(transports);
sockJsClient.setMessageCodec(new Jackson2SockJsMessageCodec());
StompMessageHandler messageHandler = new StompMessageHandler();
StompWebSocketHandler websocketHandler = new StompWebSocketHandler(messageHandler, new StringMessageConverter());
WebSocketConnectionManager manager = new WebSocketConnectionManager(sockJsClient, websocketHandler, "ws://localhost:8080/stomp");
manager.start();
System.in.read();
我知道通過使用@Configuration
和@Bean
的注釋,我可以使這更簡單,但我正在嘗試做一個“原始”實現,這樣我就能理解一切如何協同工作。
更多信息:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.websocket</groupId>
<artifactId>javax.websocket-client-api</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-websocket</artifactId>
<version>8.0.0-RC10</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.0</version>
</dependency>
如果有趣的話,Spring Integration為WebSocketClient提供了一個實現。
是的,在內部它使用ConnectionManagerSupport
。
這是一個測試用例 ,演示如何從@Configuration
配置它。
但我認為您應該嘗試使用開箱即用的WebSocketHandler
實現 - SubProtocolWebSocketHandler
和StompSubProtocolHandler
。
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