Java Session类代码示例

import javax.websocket.Session; //导入依赖的package包/类
@Test
public void testClientDropsConnection() throws Exception {
    Tomcat tomcat = getTomcatInstance();
    // No file system docBase required
    Context ctx = tomcat.addContext("", null);
    ctx.addApplicationListener(Bug58624Config.class.getName());
    Tomcat.addServlet(ctx, "default", new DefaultServlet());
    ctx.addServletMapping("/", "default");

    WebSocketContainer wsContainer =
            ContainerProvider.getWebSocketContainer();

    tomcat.start();

    SimpleClient client = new SimpleClient();
    URI uri = new URI("ws://localhost:" + getPort() + Bug58624Config.PATH);

    Session session = wsContainer.connectToServer(client, uri);
    // Break point A required on following line
    session.close();
}
 

import javax.websocket.Session; //导入依赖的package包/类
@OnMessage
public void msgReceived(ChatMessage msg, Session s) {
    msg.from(user);
    if (msg.getMsg().equals(LOGOUT_MSG)) {
        try {
            s.close();
            return;
        } catch (IOException ex) {
            Logger.getLogger(ChatServer.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    ChatEventBus.getInstance().publishChat(msg);
    System.out.println("Chat Message placed on HZ Topic " + CHAT_TOPIC_NAME);

}
 

import javax.websocket.Session; //导入依赖的package包/类
@Override
public void onClose(Session session, CloseReason closeReason) {
    Room room = getRoom(false);
    if (room != null) {
        room.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                try {
                    // Player can be null if it couldn't enter the room
                    if (player != null) {
                        // Remove this player from the room.
                        player.removeFromRoom();

                        // Set player to null to prevent NPEs when onMessage events
                        // are processed (from other threads) after onClose has been
                        // called from different thread which closed the Websocket session.
                        player = null;
                    }
                } catch (RuntimeException ex) {
                    log.error("Unexpected exception: " + ex.toString(), ex);
                }
            }
        });
    }
}
 

import javax.websocket.Session; //导入依赖的package包/类
/**
 * 
 * Called by web socket server, message contain execution tracking status that updated on job canvas.
 *
 * @param message the message
 * @param session the session
 */
@OnMessage
public void updateJobTrackingStatus(String message, Session session) { 

	final String status = message; 
	Display.getDefault().asyncExec(new Runnable() {
		public void run() {
			Gson gson = new Gson();
			ExecutionStatus executionStatus=gson.fromJson(status, ExecutionStatus.class);
			IWorkbenchPage page = PlatformUI.getWorkbench().getWorkbenchWindows()[0].getActivePage();
			IEditorReference[] refs = page.getEditorReferences();
			for (IEditorReference ref : refs){
				IEditorPart editor = ref.getEditor(false);
				if(editor instanceof ELTGraphicalEditor){
					ELTGraphicalEditor editPart=(ELTGraphicalEditor)editor;
					if(editPart.getJobId().equals(executionStatus.getJobId()) || (((editPart.getContainer()!=null) && 
							(editPart.getContainer().getUniqueJobId().equals(executionStatus.getJobId()))) && editPart.getContainer().isOpenedForTracking() )){
							TrackingStatusUpdateUtils.INSTANCE.updateEditorWithCompStatus(executionStatus, (ELTGraphicalEditor)editor,false);
					}
				}
			}
		}
	});
}
 

import javax.websocket.Session; //导入依赖的package包/类
/**
 * 连接建立成功调用的方法-与前端JS代码对应
 * 
 * @param session 可选的参数。session为与某个客户端的连接会话，需要通过它来给客户端发送数据
 */
@OnOpen
public void onOpen(Session session, EndpointConfig config) {
	// 单个会话对象保存
	this.session = session;
	webSocketSet.add(this); // 加入set中
	this.httpSession = (HttpSession) config.getUserProperties().get(HttpSession.class.getName());
	String uId = (String) httpSession.getAttribute("userid"); // 获取当前用户
	String sessionId = httpSession.getId();
	this.userid = uId + "|" + sessionId;
	if (!OnlineUserlist.contains(this.userid)) {
		OnlineUserlist.add(userid); // 将用户名加入在线列表
	}
	routetabMap.put(userid, session); // 将用户名和session绑定到路由表
	System.out.println(userid + " -> 已上线");
	String message = getMessage(userid + " -> 已上线", "notice", OnlineUserlist);
	broadcast(message); // 广播
}
 

import javax.websocket.Session; //导入依赖的package包/类
@OnClose
   public void unregisterUser(Session websocket, CloseReason reason) throws JSONException, IOException {
String login = websocket.getUserPrincipal().getName();
if (login == null) {
    return;
}

Integer organisationId = Integer
	.valueOf(websocket.getRequestParameterMap().get(AttributeNames.PARAM_ORGANISATION_ID).get(0));
KumaliveDTO kumalive = kumalives.get(organisationId);
if (kumalive == null) {
    return;
}
KumaliveUser user = kumalive.learners.remove(login);
if (user != null) {
    Integer userId = user.userDTO.getUserID();
    if (kumalive.raisedHand != null) {
	kumalive.raisedHand.remove(userId);
    }
    if (userId.equals(kumalive.speaker)) {
	kumalive.speaker = null;
    }
}

sendRefresh(kumalive);
   }
 

import javax.websocket.Session; //导入依赖的package包/类
/**连接建立成功调用的方法*/
@OnOpen
public void onOpen(Session session,EndpointConfig config){
	HttpSession httpSession = (HttpSession) config.getUserProperties().get(HttpSession.class.getName());
	if(StorageUtil.init(httpSession).getLoginMemberId()!=ReturnUtil.NOT_LOGIN_CODE){
		long userId = StorageUtil.init(httpSession).getLoginMemberId();
		mapUS.put(userId,session);
		mapSU.put(session,userId);
		//上线通知由客户端自主发起
		onlineCount++;           //在线数加1
		System.out.println("用户"+userId+"进入WebSocket！当前在线人数为" + onlineCount);
		getUserKey(userId);
	}else{
		try {
			session.close();
			System.out.println("未获取到用户信息，关闭WebSocket！");
		} catch (IOException e) {
			System.out.println("关闭WebSocket失败！");
		}
	}
}
 

import javax.websocket.Session; //导入依赖的package包/类
@OnMessage
public void echoBinaryMessage(Session session, ByteBuffer msg,
        boolean last) {
    try {
        session.getBasicRemote().sendBinary(msg, last);
    } catch (IOException e) {
        try {
            session.close();
        } catch (IOException e1) {
            // Ignore
        }
    }
}
 

import javax.websocket.Session; //导入依赖的package包/类
/**
    * Removes Learner websocket from the collection.
    */
   @OnClose
   public void unregisterUser(Session session, CloseReason reason) {
String login = session.getUserPrincipal().getName();
if (login == null) {
    return;
}

Long lessonId = Long.valueOf(session.getRequestParameterMap().get(AttributeNames.PARAM_LESSON_ID).get(0));
Map<String, Session> lessonWebsockets = CommandWebsocketServer.websockets.get(lessonId);
if (lessonWebsockets == null) {
    return;
}

lessonWebsockets.remove(login);
   }
 

import javax.websocket.Session; //导入依赖的package包/类
/**
    * Tell learners that the teacher finished a question
    */
   private void downHandPrompt(JSONObject requestJSON, Session websocket) throws IOException, JSONException {
Integer organisationId = Integer
	.valueOf(websocket.getRequestParameterMap().get(AttributeNames.PARAM_ORGANISATION_ID).get(0));
KumaliveDTO kumalive = kumalives.get(organisationId);

User user = getUser(websocket);
Integer userId = user.getUserId();

if (!KumaliveWebsocketServer.getSecurityService().hasOrgRole(organisationId, userId,
	new String[] { Role.GROUP_MANAGER, Role.MONITOR }, "kumalive down hand prompt", false)) {
    String warning = "User " + userId + " is not a monitor of organisation " + organisationId;
    logger.warn(warning);
    return;
}

kumalive.raiseHandPrompt = false;
kumalive.raisedHand.clear();
if (logger.isDebugEnabled()) {
    logger.debug("Teacher " + userId + " finished a question in Kumalive " + kumalive.id);
}

sendRefresh(kumalive);
   }
 

import javax.websocket.Session; //导入依赖的package包/类
public void broadcast(@Observes @LeaderDataQualifier String leaderboard) {
    for (final Session s : CLIENTS) {
        if (s != null && s.isOpen()) {
            /**
             * Asynchronous push
             */
            s.getAsyncRemote().sendText(leaderboard, new SendHandler() {
                @Override
                public void onResult(SendResult result) {
                    if (result.isOK()) {
                        //Logger.getLogger(MeetupGroupsLiveLeaderboardEndpoint.class.getName()).log(Level.INFO, " sent to client {0}", s.getId());
                    } else {
                        Logger.getLogger(MeetupGroupsLiveLeaderboardEndpoint.class.getName()).log(Level.SEVERE, "Could not send to client " + s.getId(),
                                result.getException());
                    }
                }
            });
        }

    }

}
 

import javax.websocket.Session; //导入依赖的package包/类
@OnMessage
public void handleMessage(Session session, String message) throws IOException {
    logger.info("Received msg: " + message);
    String sendMsg = "Reversed: " + new StringBuilder(message).reverse();
    session.getBasicRemote().sendText(sendMsg);
    logger.info("Send msg: " + sendMsg);
}
 

import javax.websocket.Session; //导入依赖的package包/类
/**
 * 
 * Close websocket client connection.
 * @param session
 */
public void closeWebSocketConnection(Session session){
	try {
		Thread.sleep(DELAY);
	} catch (InterruptedException e1) {
	}
	if (session != null  && session.isOpen()) {
		try {
			CloseReason closeReason = new CloseReason(CloseCodes.NORMAL_CLOSURE,"Closed");
			session.close(closeReason);
			logger.info("Session closed");
		} catch (IOException e) {
			logger.error("Fail to close connection ",e);
		}
		
	}

}
 

import javax.websocket.Session; //导入依赖的package包/类
@Override
public final void onError(Session session, Throwable throwable) {

    if (methodMapping.getOnError() == null) {
        log.error(sm.getString("pojoEndpointBase.onError",
                pojo.getClass().getName()), throwable);
    } else {
        try {
            methodMapping.getOnError().invoke(
                    pojo,
                    methodMapping.getOnErrorArgs(pathParameters, session,
                            throwable));
        } catch (Throwable t) {
            ExceptionUtils.handleThrowable(t);
            log.error(sm.getString("pojoEndpointBase.onErrorFail",
                    pojo.getClass().getName()), t);
        }
    }
}
 

import javax.websocket.Session; //导入依赖的package包/类
/**
    * When user leaves the activity.
    */
   @OnClose
   public void unregisterUser(Session websocket, CloseReason reason) {
Long toolContentID = Long
	.valueOf(websocket.getRequestParameterMap().get(AttributeNames.PARAM_TOOL_CONTENT_ID).get(0));
websockets.get(toolContentID).remove(websocket);

if (log.isDebugEnabled()) {
    // If there was something wrong with the connection, put it into logs.
    log.debug("User " + websocket.getUserPrincipal().getName() + " left Dokumaran with Tool Content ID: "
	    + toolContentID
	    + (!(reason.getCloseCode().equals(CloseCodes.GOING_AWAY)
		    || reason.getCloseCode().equals(CloseCodes.NORMAL_CLOSURE))
			    ? ". Abnormal close. Code: " + reason.getCloseCode() + ". Reason: "
				    + reason.getReasonPhrase()
			    : ""));
}
   }