I am mostly writing a small tools for tech savvy people, e.g. programmers, engineers etc. As those tools are usually quick hacks improved over time I know that there are going to be unhandled exceptions and the users are not going to mind. I would like the user to be able to send me the traceback so I can examine what happened and possibly improve the application.I usually do wxPython programming but I have done some Java recently. I have hooked up the \[code\]TaskDialog\[/code\] class to the \[code\]Thread.UncaughtExceptionHandler()\[/code\] and I am quite happy with the result. Especially that it can catch and handle exceptions from any thread:
I was doing something similar in wxPython for a long time. However:[*]I had to write a decorator-hack to be able to print exceptions from another thread well.[*]Even when functional, the result is quite ugly.
Here is the code for both Java and wxPython so you can see what I have done:Java:\[code\]import java.awt.EventQueue;import javax.swing.JFrame;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.JButton;import java.awt.GridBagLayout;import java.awt.GridBagConstraints;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import com.ezware.dialog.task.TaskDialogs;public class SwingExceptionTest { private JFrame frame; public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException e) { } catch (InstantiationException e) { } catch (IllegalAccessException e) { } catch (UnsupportedLookAndFeelException e) { } Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() { public void uncaughtException(Thread t, Throwable e) { TaskDialogs.showException(e); } }); EventQueue.invokeLater(new Runnable() { public void run() { try { SwingExceptionTest window = new SwingExceptionTest(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } public SwingExceptionTest() { initialize(); } private void initialize() { frame = new JFrame(); frame.setBounds(100, 100, 600, 400); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); GridBagLayout gridBagLayout = new GridBagLayout(); gridBagLayout.columnWidths = new int[]{0, 0}; gridBagLayout.rowHeights = new int[]{0, 0}; gridBagLayout.columnWeights = new double[]{0.0, Double.MIN_VALUE}; gridBagLayout.rowWeights = new double[]{0.0, Double.MIN_VALUE}; frame.getContentPane().setLayout(gridBagLayout); JButton btnNewButton = new JButton("Throw!"); btnNewButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { onButton(); } }); GridBagConstraints gbc_btnNewButton = new GridBagConstraints(); gbc_btnNewButton.gridx = 0; gbc_btnNewButton.gridy = 0; frame.getContentPane().add(btnNewButton, gbc_btnNewButton); } protected void onButton(){ Thread worker = new Thread() { public void run() { throw new RuntimeException("Exception!"); } }; worker.start(); }}\[/code\]wxPython:\[code\]import StringIOimport sysimport tracebackimport wxfrom wx.lib.delayedresult import startWorkerdef thread_guard(f): def thread_guard_wrapper(*args, **kwargs) : try: r = f(*args, **kwargs) return r except Exception: exc = sys.exc_info() output = StringIO.StringIO() traceback.print_exception(exc[0], exc[1], exc[2], file=output) raise Exception("<THREAD GUARD>\n\n" + output.getvalue()) return thread_guard_wrapper@thread_guarddef thread_func(): return 1 / 0def thread_done(result): r = result.get() print rclass MainWindow(wx.Frame): def __init__(self, *args, **kwargs): wx.Frame.__init__(self, *args, **kwargs) self.panel = wx.Panel(self) self.button = wx.Button(self.panel, label="Throw!") self.button.Bind(wx.EVT_BUTTON, self.OnButton) self.sizer = wx.BoxSizer() self.sizer.Add(self.button) self.panel.SetSizerAndFit(self.sizer) self.Show() def OnButton(self, e): startWorker(thread_done, thread_func)app = wx.App(True)win = MainWindow(None, size=(600, 400))app.MainLoop()\[/code\]Now the question:Can I do easily something similar to Java solution in wxPython? Or maybe, is there a better way in either Java or wxPython?