Hi,
I have a servlet which draws HTML page from doGet().
I want to refresh/redraw my servlet outside of doGet()/doPost().
(I have a thread in my servlet which check the variable is set to
true or not. If true I want to redraw/refresh my screen.)
so I tried thru' 'server push' method. If i do from doGet() it's working.
If I try to refresh from run() it's not working.
so how to refresh the page whenever I need ?
Tnanx in advance
my code
-------
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MultipartResponse implements Runnable {
HttpServletResponse res;
ServletOutputStream out;
boolean endedLastResponse = true;
Thread thread = null;
public MultipartResponse(HttpServletResponse response) throws IOException {
System.out.println("MultiPartResponse: constructor()");
res = response;
out = res.getOutputStream();
res.setContentType("multipart/x-mixed-replace;boundary=End");
out.println();
}
public void startResponse(String contentType) throws IOException {
if (!endedLastResponse) {
endResponse();
}
// Start the next one
out.println("Content-type: " + contentType);
out.println();
endedLastResponse = false;
}
public void endResponse() throws IOException {
out.println();
out.flush();
endedLastResponse = true;
}
public void finish() throws IOException {
out.println("--End--");
out.flush();
}
public void start() {
System.out.println("MultiPartResponse: start()");
if ( thread == null ) {
thread = new Thread(this);
thread.start();
} // if
} // start()
public void stop() {
if ( thread != null ) {
thread.stop();
thread = null;
} // if
} // stop()
public void run() {
System.out.println("MultiPartResponse: run()");
while ( true ) {
MultiPartEx.UserSleep(10000);
MultiPartEx.staticVar = true;
System.out.println("MultiPartResponse: var set to true.");
break;
} // while
} // run()
} // End Of MultipartResponse
-----------------------------------------------------------------------
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class MultiPartEx extends HttpServlet implements Runnable {
public static boolean staticVar = false;
Thread thread = null;
MultipartResponse multi = null;
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
System.out.println("MultiPartEx: doGet");
res.setContentType("text/plain");
PrintWriter out = new PrintWriter(res.getOutputStream());
multi = new MultipartResponse(res);
multi.start();
multi.startResponse("text/plain");
multi.out.println("I am first. Wait for 5 sec");
multi.endResponse();
start();
/*
UserSleep(5000);
multi.startResponse("text/html");
multi.out.println("I am 2nd. Refreshing over. Bye...");
multi.endResponse();
multi.finish();
*/
} // doGet()
public void start() {
System.out.println("MultiPartEx: start()");
if ( thread == null ) {
thread = new Thread(this);
thread.start();
} // if
} // start()
public void stop() {
if ( thread != null ) {
thread.stop();
thread = null;
} // if
} // stop()
public void run() {
System.out.println("MultiPartEx: run");
while ( true ) {
try {
if ( staticVar ) {
System.out.println("MultiPartEx: var is true. refresh.");
multi.startResponse("text/plain");
multi.out.println("I am 2nd. Refreshing over. Bye..");
multi.endResponse();
multi.finish();
staticVar = false;
System.out.println("MultiPartEx: refreshed.");
return;
} // if
UserSleep(2000);
} catch(IOException ioe) { }
} // while
} // run()
public static void UserSleep(int sleepTime)
{
try {
Thread.sleep(sleepTime);
}catch(Exception e) { }
}
} // End Of Class MultipartEx
------------------------------------------------------------------------
I run it by, http://mymachine/servlet/MultiPartEx
and i am getting "I am first. Wait for 5 sec" msg only,
I am not getting the 2nd one. How to do it ?
Pls help me.
Thanx in advance.
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