Comet和NIO - 客戶端斷開

我有這個類：Comet和NIO - 客戶端斷開

public class CometServlet extends HttpServlet implements CometProcessor{ 
private static final Integer TIMEOUT = 20 * 1000; 

@Override 
public void event(final CometEvent event) throws IOException, ServletException { 

    HttpServletRequest request = event.getHttpServletRequest(); 
    HttpServletResponse response = event.getHttpServletResponse(); 
    if (event.getEventType() == CometEvent.EventType.BEGIN) { 
     request.setAttribute("org.apache.tomcat.comet.timeout", TIMEOUT); 
     System.out.println("Begin for session: " + request.getSession(true).getId()); 
    } else if (event.getEventType() == CometEvent.EventType.ERROR) { 
     System.out.println("Error for sessions: " + request.getSession(true).getId()); 
     if(event.getEventSubType() == EventSubType.TIMEOUT) { 
      System.out.println("timeout for session: " + request.getSession(true).getId()); 
     } 
     else if(event.getEventSubType() == EventSubType.IOEXCEPTION) { 
      System.out.println("ioexception for session: " + request.getSession(true).getId()); 
     } 
     else if(event.getEventSubType() == EventSubType.CLIENT_DISCONNECT) { 
      System.out.println("client disconnect for session: " + request.getSession(true).getId()); 
     } 
     response.getWriter().close(); 
     event.close(); 
    } else if (event.getEventType() == CometEvent.EventType.END) { 
     System.out.println("End for session: " + request.getSession(true).getId()); 
     if(event.getEventSubType() == EventSubType.WEBAPP_RELOAD) { 
      System.out.println("webappreload for session: " + request.getSession(true).getId()); 
     } 
     else if(event.getEventSubType() == EventSubType.SESSION_END) { 
      System.out.println("sessionend for session: " + request.getSession(true).getId()); 
     } 
     response.getWriter().close(); 
     event.close(); 
    } else if (event.getEventType() == CometEvent.EventType.READ) { 
     InputStream is = request.getInputStream(); 
     byte[] buf = new byte[512]; 
     do { 
      int n = is.read(buf); //can throw an IOException 
      if (n > 0) { 
       log("Read " + n + " bytes: " + new String(buf, 0, n) 
       + " for session: " + request.getSession(true).getId()); 
      } else if (n < 0) { 
       System.out.println("error(event, request, response)"); 
       return; 
      } 
     } while (is.available() > 0); 
    } 
} 
}

但我不能趕上event.getEventSubType() == EventSubType.CLIENT_DISCONNECT。你能幫我嗎？

來源

2011-04-21 CeccoCQ

你是如何試圖觸發它？ – Andrew 2011-04-21 13:57:28

我有一個移動java客戶端，提交一個簡單的獲取請求，並等待服務器的響應。但我必須管理網絡斷開連接，並且我無法捕獲此子類型事件。 – CeccoCQ 2011-04-21 14:24:42

似乎CLIENT_DISCONNECT只用錯誤的子類型，當插座從客戶端關閉出現這種情況。

來源

2011-04-21 10:06:04 TerriJordan

我試過了，但類型錯誤僅在超時時啓動，而不是在客戶端斷開連接時啓動。 – CeccoCQ 2011-04-21 10:11:04

是的，但超時還表示連接未關閉。我認爲你應該在「event.close（）;」之後測試event.getEventSubType（）發生了什麼。呼叫。 – TerriJordan 2011-04-21 10:34:55

我不明白。我只需要知道客戶端關閉套接字連接時，我可以在tomcat上關閉會話。但是這個「錯誤」從來沒有被捕捉到...... – CeccoCQ 2011-04-21 12:23:43

Comet和NIO - 客戶端斷開

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