Repeated HTTP Connections

Question

Hi,
I am trying to create an HTTP Connection that makes requests every 5 seconds or so. This is to keep a multiplayer game i'm writing updated with the latest game state.
The user should also be able to make requests using the same connection object with updates in background. I've synchronised the connect method i use but if i make too many requests at same time it throws an IOException. I'm not sure how to stop this because i thought the method would only allow one connection at a time by synchronising it.
Any suggestions?
Chris.

Answer 1

Here is the code that makes a request to the server. This makes a POST request and returns the result. It works fine except every now and then i get an error about all the connections being used up. I simply want to be able to make requests every few seconds which i use a Timer to do. Why are my connections being used up? what am i not doing to clear up each connection?
     private synchronized String httpRequest(String request)
          HttpConnection http = null;
          OutputStream os = null;
          InputStream is = null;
          try
               http = (HttpConnection) Connector.open(getURL().toString());               
               http.setRequestMethod(HttpConnection.POST);
               http.setRequestProperty("User-Agent", "Profile/MIDP-1.0 Configuration/CLDC-1.0");
               //send request
               os = http.openOutputStream();
          os.write(request.getBytes());
          os.flush();                
               System.out.println("sent request");
               //get response          
               is = http.openInputStream();
               String xml = getMsg(is);
               System.out.println("Get response" + xml);                         
          if (is != null){                        
               is.close();
               System.out.println("IS CLOSED");
     if (os != null){
          os.close();
     System.out.println("OS CLOSED");
     if (http != null){
     http.close();
     System.out.println("CONN CLOSED");
          return xml;
          catch(Exception ex)
               System.out.println("httpRequest: "+ ex.toString());
               return null;
     }