package com.nilhcem.fakesmtp.core.exception;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import javax.swing.JOptionPane;

 import javax.swing.SwingUtilities;

 import java.awt.Component;

 /**

  * Intercepts every uncaught exception.

  *

  * @author Nilhcem

  * @since 1.1

  * @see <a href="link">http://stuffthathappens.com/blog/2007/10/07/programmers-notebook-uncaught-exception-handlers/</a>

  */

 public final class UncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {

         private Component parentComponent;

         private static final Logger LOGGER = LoggerFactory.getLogger(UncaughtExceptionHandler.class);

         /**

          * Called when an uncaught exception is thrown. Will display the error message in a dialog box.

          *

          * @param t the thread where the exception was throws.

          * @param e the thrown exception.

          */

         @Override

         public void uncaughtException(final Thread t, final Throwable e) {

                 try {

                         if (SwingUtilities.isEventDispatchThread()) {

                                 showException(t, e);

                         } else {

                                 SwingUtilities.invokeLater(new Runnable() {

                                         public void run() {

                                                 showException(t, e);

                                         }

                                 });

                         }

                 } catch (Exception excpt) {

                         LOGGER.error("", excpt);

                 }

         }

         /**

          * Sets the parent component where an error dialog might be displayed.

          *

          * @param parentComponent a component where an error dialog might be displayed.

          */

         public void setParentComponent(Component parentComponent) {

                 this.parentComponent = parentComponent;

         }

         /**

          * Displays an error dialog describing the uncaught exception.

          *

          * @param t the thread where the exception was throws.

          * @param e the thrown exception.

          */

         private void showException(Thread t, Throwable e) {

                 LOGGER.error("", e);

                 String msg = String.format("Unexpected problem on thread %s: %s", t.getName(), e.getMessage());

                 JOptionPane.showMessageDialog(parentComponent, msg);

         }

 }