[英]Spring websocket in embedded tomcat 8.0.21
我想基於一個例子創建一個WebSocket。 唯一的轉折是我在嵌入式tomcat中運行我的應用程序。
package com.test.websocket;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.AbstractWebSocketHandler;
public class WebSocketTest extends AbstractWebSocketHandler {
private static Logger logger = LoggerFactory.getLogger(WebSocketTest.class);
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
logger.debug("Recieved websocket message: " + message);
session.sendMessage(new TextMessage("thanks"));
}
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
logger.info("WebSocket connection established!");
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
logger.info("WebSocket connection closed!");
}
}
配置(websocket.spring.xml):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:websocket="http://www.springframework.org/schema/websocket"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/websocket
http://www.springframework.org/schema/websocket/spring-websocket.xsd">
<websocket:handlers>
<websocket:mapping path="/socket" handler="webSocketHandler"/>
</websocket:handlers>
<bean id="webSocketHandler" class="com.test.websocket.WebSocketTest"/>
</beans>
Servlet映射位於/ websocket / *
從日志看起來spring-websocket似乎已成功初始化,但當我嘗試連接到websocket時,我收到此錯誤。
Servlet.service() for servlet [spring-websocket] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.socket.server.HandshakeFailureException: Uncaught failure for request http://localhost:9876/websocket/socket; nested exception is java.lang.IllegalArgumentException: No 'javax.websocket.server.ServerContainer' ServletContext attribute. Are you running in a Servlet container that supports JSR-356?] with root cause
依賴關系是:tomcat-embed-core,tomcat-embed-websocket,tomcat-juli和因為( Spring websocket示例 - 錯誤 - 你是否在支持J SR-356的Servlet容器中運行? )javax.websocket-api和tomcat -websocket
我錯過了什么?
提前致謝!
也許我找到了解決問題的方法。
您需要將WsSci servlet容器初始化程序用於嵌入式tomcat上下文:
context.addServletContainerInitializer(new WsSci(),null);
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