Java Reference
In-Depth Information
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author Juneau
*/
@WebServlet(name = "ReporterServlet", urlPatterns = {"/ReporterServlet"})
public class ReporterServlet extends HttpServlet {
@Resource(name = "concurrent/BatchExecutor")
ManagedExecutorService mes;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
out.println("<html>");
out.println("<head>");
out.println("<title>Job Report Invoker</title>");
out.println("</head>");
out.println("<body>");
out.println("<h2>This servlet initiates the job report task. Please look "
+ "in the server log to see the results.</h2> <br />" +
" This task is not run asynchronously, however, the " +
" task will process independently.");
out.println("<br/><br/>");
ReporterTask reporterTask = new ReporterTask("JobsReport");
Future reportFuture = mes.submit(reporterTask);
while( !reportFuture.isDone() )
out.println("Running...<BR>");
if (reportFuture.isDone()){
out.println("Report Complete");
}
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
...
}
When the servlet is visited, the reporter task will be initiated and it will begin to produce results.
