Browser Expiration big problem

I've seen this code somewhere :

<%

///// dummy tags to the browser so that connection is maintained /////////

final java.util.Vector vec = new java.util.Vector();

final java.io.PrintWriter writer = response.getWriter();

Runnable runnable = new Runnable() {

public void run() {

int count = 0;

while(vec.size() == 0) {

try {

Thread.sleep(5000);

} catch (InterruptedException e) {

e.printStackTrace();

}

try {

writer.write("<keepAlive id=\"" + count++ + "\"/>\r\n");

writer.flush();

} catch (Exception e) {

e.printStackTrace();

}

}

}

};

Thread transectionThread = new Thread(runnable);

transectionThread.start();

///////////// End New Code to send dummy tags to browser so connection is maintained /////////

%>

<%

vec.addElement("test");

// Wait for the other thread to completed.

transectionThread.join();

%>

Does anybody know how to use it or haveanother solution ?

GDudea at 2007-7-13 11:24:44 >

Hi all,

I was talking about the same problem in a post recently, but i have no response yet. I think this should work but i haven't tested. First of all you should use an applet (a request from html in the browser will expire for sure if the browser has a timeout, am i wrong?) and then two things have to be done:

?In the applet use a "HttpURLConnection" and use the method "setConnectTimeout" to avoid timeout.

?Configure the server to avoid timeout. I will use Tomcat, i have to modify the http connector and change the "connectionTimeout" parameter.

This could work, but it should be tested, if any of you tries it, please feedback your results.

Thanks in advance.

jc_egeaa at 2007-7-13 11:24:44 >

> In your case you could also perform your business

> logic in a Thread apart (so you'll get an inmediate

> response from server) and then refresh from

> javascript periodically to check if the results have

> already being retreived.

It's one of the solution I was thinking, but how do I do that ? Do you have a little example of something like that ?

It would be helpful !

Thx !

GDudea at 2007-7-13 11:24:44 >

I understand the way you've done it, but does anyone can explain me how to do my connection in a new Thread ?

I'm blocked with this *** problem for a while now ...

Just to remember : For Now :

1. my JSP call a servlet with info

2. In the serlet --> get the parameters, validates them and call bcDefects.vConnection() to get the data from the database. (If this request last more than 90 sec. IE expire ... grmf)

3. get back the data to the servlet and put it in a session variable cause I'll need it to draw a graphic.

4. Return to my JSP that show info and draw graphic (by calling another servlet in the SRC of a IMG tag).

I'll really be grateful if someone could help me because my expiries are soon ...

GDudea at 2007-7-13 11:24:44 >