package com.ack.web.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
*/
public class BufferingServletResponses extends HttpServlet {
public void doGet( HttpServletRequest req, HttpServletResponse res )
throws ServletException, IOException {
res.setContentType( "text/html" );
PrintWriter pw = res.getWriter();
// create 32K buffer
res.setBufferSize( 32 * 1024 );
pw.println( "everything we send now is buffered " );
pw.println( "at the server until we reach the " );
pw.println( "buffer size limit or we do a flush!" );
// check to see if anything has been sent to the client
if( res.isCommitted() ) {
pw.println( "
damned, something has been sent" );
}
else {
// clear the buffer, so what has gone before is lost
res.resetBuffer();
pw.println( "we are going to clear this as well" );
// clears buffer, status codes and headers
res.reset();
// we've blanked the ContentType header so lets add it back
res.setContentType( "text/html" );
pw.println( "
but we are going to see this" );
}
// send what we have now
res.flushBuffer();
pw.println( "
and this will get flushed at the end of the method" );
pw.println( "
current response buffer size is: " + res.getBufferSize() );
}
}