Stop the method Execution.

Question

Hi..
I have a method call to make a credit card payment.sometimes it takes so much times.If that process takes more than 10 minutes,
I want to stop that method execution.I have implemented the TimerTask to check the execution time and stop..but I don't have a idea to stop that processing method...
can anyone give me a suggetion.
Regards
Amila

Answer 1

Hi,
You may have a look at this thread [http://forums.sun.com/thread.jspa?threadID=5347956&tstart=0]
I changed the suggested code a little to make it (hopefully) suitable for your use case. Note that the long running task communicates to its invoker via System.out.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
public class TaskDispatcher {
    private static long lengthy = 10000;
    public static void main(String[] args) {
     SwingUtilities.invokeLater(new Runnable() {
         @Override
         public void run() {
          new TaskDispatcher().createGUI();
    private JTextPane textPane;
    private JLabel message;
    private Process process;
    private Action kill = new AbstractAction("Kill") {
     private static final long serialVersionUID = 1L;
         this.setEnabled(false);
     @Override
     public void actionPerformed(ActionEvent event) {
         destroy();
    private Action dispatch = new AbstractAction("Dispatch") {
     private static final long serialVersionUID = 1L;
     @Override
     public void actionPerformed(ActionEvent event) {
         dispatch();
    public void createGUI() {
     JFrame frame = new JFrame();
     textPane = new JTextPane();
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     message = new JLabel("Status", JLabel.CENTER);
     JToolBar toolBar = new JToolBar();
     frame.add(toolBar, BorderLayout.PAGE_START);
     frame.add(new JScrollPane(textPane), BorderLayout.CENTER);
     frame.add(message, BorderLayout.PAGE_END);
     toolBar.add(dispatch);
     toolBar.add(kill);
     frame.setSize(400, 400);
     frame.setLocationRelativeTo(null);
     frame.setVisible(true);
    private void appendLine(String line) {
     Document doc = textPane.getDocument();
     try {
         doc.insertString(doc.getLength(), line + "\n", null);
     } catch (BadLocationException e) {
         e.printStackTrace();
    private void destroy() {
     kill.setEnabled(false);
     process.destroy();
     dispatch.setEnabled(true);
    private void dispatch() {
     dispatch.setEnabled(false);
     try {
         textPane.setText("");
         launch();
         kill.setEnabled(true);
     } catch (IOException e) {
         e.printStackTrace();
         dispatch.setEnabled(true);
    private void handleErr(final Process process) {
     new Thread(new Runnable() {
         final BufferedReader errReader;
          errReader = new BufferedReader(new InputStreamReader(process
               .getErrorStream()));
         @Override
         public void run() {
          try {
              String line = null;
              while ((line = errReader.readLine()) != null) {
               System.err.println("Other JVM: " + line);
          } catch (Throwable t) {
              t.printStackTrace();
          } finally {
              try {
               errReader.close();
              } catch (IOException e) {
               e.printStackTrace();
     }).start();
    private void handleOut(final Process process) {
     new Thread(new Runnable() {
         final BufferedReader outReader;
          outReader = new BufferedReader(new InputStreamReader(process
               .getInputStream()));
         @Override
         public void run() {
          try {
              String line = null;
              while ((line = outReader.readLine()) != null) {
               appendLine(line);
          } catch (Throwable t) {
              t.printStackTrace();
          } finally {
              try {
               outReader.close();
              } catch (Throwable t) {
               t.printStackTrace();
     }).start();
    private void launch() throws IOException {
     final String command;
     command = "java -cp \"" + System.getProperty("java.class.path") + "\" "
          + LengthyTask.class.getCanonicalName() + " \"" + lengthy + "\"";
     process = Runtime.getRuntime().exec(command);
     message.setText("Process is running");
     handleOut(process);
     handleErr(process);
     new Thread(new Runnable() {
         @Override
         public void run() {
          try {
              int rc = process.waitFor();
              kill.setEnabled(false);
              if (rc != 0) {
               appendLine("Exit code " + rc);
              dispatch.setEnabled(true);
              message.setText(rc == 0 ? "Completed successfully"
                   : "Problem exit code: " + rc);
          } catch (InterruptedException e) {
              e.printStackTrace();
     }).start();
}Piet