How to do a Http get in the background where user access the web app

Question

I want to touch a listener page in non - j2ee based application 1 (say A1 which is ColdFusion) from a j2ee based application 2 ( say A2). The exact functionality would be : A struts based application's A2 web page would send a session id to a listener webpage in A1. How would i achieve this, as i just need to pass some information in Background and not transfer the control to application A1 where as user is performing normal course of actions in foreground? I can think of Socket programming, any other approach that you can think better than this?
So, I need to pass information to a page out of my web application scope yet keep the control within the web application?

Answer 1

This is the snippet I am trying in my "action". Assuming that, the program in A1 reads the request parameters and sends me a response. Would this be enough or am i missing something?
try
HttpURLConnection urlconn = null;
try
String urlStr = "http://IPADDRESS/EntranceSeminar_Web/index.jsp?sessionid="+session.getId();
     System.out.println("URL string = " + urlStr);
URL url = new URL(urlStr);
urlconn = (HttpURLConnection)url.openConnection();
urlconn.setInstanceFollowRedirects(true);
urlconn.setRequestMethod("GET");
urlconn.setRequestProperty("Dummy", "RestValue");
urlconn.setDoOutput(true);
urlconn.connect();
out.println("<br>The response code is : "+urlconn.getResponseCode()+" Message: "+urlconn.getResponseMessage());
catch(MalformedURLException mfe)
System.out.println("MalformedURL Exception");
mfe.printStackTrace();
catch(IOException ioe)
System.out.println("IO Exception");
ioe.printStackTrace();
}