Servlet that never stops...

Question

Hi,
Is possible to do a threaded servlet that never finishes to response? something like a servlet that, when called, connect to a database and send the results of a query to client, update the database and try the query again ... like:
while(true)
rs = stmt.executeQuery("select * from table where flag = 1");
while(rs.next())
os.writeChars(rs.getString(1));
stmt.executeUpdate("update table set flag = 2")
os.flush();
In another place, somebody will insert data in the database, with the flag set to 1 ... so the servlet will ever try to select data that are not sent to client .... then send the new data to client ...
Is this possible? I tried to do something like this, but when I put the thread.sleep() the servlet stopped ... May I do this? I don't know if the server memory will crashes if I do this ... but I really want to try ....
If someone have an example .... to send text, for example .... while(true){out.println("text")} ...
Thanks ....
LMMJ

Answer 1

Allright ... in other words ....
I made a servlet that works ... in the browser it is stopped ... but its thread is already running ... If I insert another registry on my database ... with the flag set up to 1 ... after 5 seconds the flag is changed to 2 by the servlet .... the servlet IS RUNNING .... but I can�t response to browser after the first loop on my thread ... I lost the connection to the browser when I sleeps the thread ... how can I send data to the browser .... make another thing ... and send data again .... without lost the connection? or .... send data to the browser in parts .... this could solve my problem ....
thanks
LMMJ