Weblogic 12.1.3+websocket

来源：互联网发布：日记本软件电脑版编辑：程序博客网时间：2024/05/29 09:39

万事开头难.工作需要研究websocket.公司之前都是用weblogic 11,所以搜索了weblogic+websocket的内容.找到了官方资料:

18 Using the WebSocket Protocol in WebLogic Server (还有一篇 17 Using WebSockets in WebLogic Server,这个应该是老版本.)

视频: youtube 教程: https://www.youtube.com/watch?v=BikL52HYaZg

资料:Jdon java EE 7教程

在旧项目中添加了一个POJO类,增加了@ServerEndpoint("/chatroomServerEndpoint")注释以及对应的@OnMessage等方法.

但是客户端 var ws = new WebSocket("ws://127.0.0.1:7001/echo");一直提示404错误.

经过长久的google,终于意识到了问题.将web.xml文件头

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

修改为

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://xmlns.jcp.org/xml/ns/javaee"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"id="WebApp_ID" version="3.1">

问题解决.

注:

web.xml中添加如下片段,解决连接关闭问题: 默认30秒.

<context-param><param-name>weblogic.websocket.tyrus.session-max-idle-timeout</param-name><param-value>0</param-value></context-param>

附带吗:

@ServerEndpoint(value = "/chatroomServerEndpoint")public class EchoEndpoint {static Set<Session> all = Collections.synchronizedSet(new HashSet<Session>());@OnOpenpublic void onOpen(Session session) throws IOException {all.add(session);System.out.println("new session");session.getBasicRemote().sendText("onOpen is invoked.");}public void onClose(Session session) {all.remove(session);System.out.println("session closed");}@OnMessagepublic void echo(Session session, String message) throws IOException {String username = (String) session.getUserProperties().get("username");if (username == null) {session.getUserProperties().put("username", message);session.getBasicRemote().sendText(buildJsonData("System", "you are now connected as " + message));} else {Iterator<Session> iteartor = all.iterator();while (iteartor.hasNext()) {iteartor.next().getBasicRemote().sendText(buildJsonData(username, message));}}}private String buildJsonData(String username, String message) {// TODO Auto-generated method stubJsonObject jsonObject = Json.createObjectBuilder().add("message", username + ":" + message).build();StringWriter stringWriter = new StringWriter();try (JsonWriter jsonWriter = Json.createWriter(stringWriter)) {jsonWriter.write(jsonObject);}return stringWriter.toString();}@OnErrorpublic void onError(Throwable t) {t.printStackTrace();}}

页面:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta charset="UTF-8"><script src="/websocket/static/js/jquery-1.8.1.min.js"type="text/javascript"></script><script>var ws = new WebSocket("ws://192.168.1.67:7001/chatroomServerEndpoint");//Right.ws.onopen = function() {console.log("open");};ws.onmessage = function(evt) {var d = JSON.parse(evt.data);if (d.message != null) {$("#a").val($("#a").val() + d.message + "\n")}};ws.onclose = function(evt) {console.log("WebSocketClosed!");};ws.onerror = function(evt) {console.log("WebSocketError!");};function send() {ws.send(m.value);};</script><body><textarea id="a" readonly="readonly" rows="10" cols="50"></textarea><br /><input type="text" id="m" size="50" /><input type="button" value="Send" onClick="send();" /></body></html>

运行结果见附图.

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