| /******************************************************************************* |
| * Copyright (c) 2003, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.ide; |
| |
| import java.text.MessageFormat; |
| |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| import org.eclipse.jface.window.Window; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.SWTError; |
| import org.eclipse.swt.widgets.MessageBox; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.application.IWorkbenchConfigurer; |
| import org.eclipse.ui.internal.ide.dialogs.InternalErrorDialog; |
| |
| /** |
| * Handles exception while running the event loop. |
| * <p> |
| * In case of a "simpler" exception such as NPE, log the exception, |
| * open a dialog to inform the user and try to keep running. |
| * In case of a exception like OutOfMemory and SWTError, log the exception, |
| * open a dialog to ask the user to decide if the workbench should |
| * be terminated. |
| * </p> |
| */ |
| public final class IDEExceptionHandler { |
| |
| private int exceptionCount = 0; |
| |
| private InternalErrorDialog dialog; |
| |
| private Shell defaultParent = new Shell(); |
| |
| private boolean closing = false; |
| |
| private IWorkbenchConfigurer workbenchConfigurer; |
| |
| //Pre-load all Strings trying to run as light as possible in case of fatal errors. |
| private static String MSG_OutOfMemoryError = IDEWorkbenchMessages.FatalError_OutOfMemoryError; |
| |
| private static String MSG_StackOverflowError = IDEWorkbenchMessages.FatalError_StackOverflowError; |
| |
| private static String MSG_VirtualMachineError = IDEWorkbenchMessages.FatalError_VirtualMachineError; |
| |
| private static String MSG_SWTError = IDEWorkbenchMessages.FatalError_SWTError; |
| |
| private static String MSG_FATAL_ERROR = IDEWorkbenchMessages.FatalError; |
| |
| private static String MSG_FATAL_ERROR_Recursive = IDEWorkbenchMessages.FatalError_RecursiveError; |
| |
| private static String MSG_FATAL_ERROR_RecursiveTitle = IDEWorkbenchMessages.Internal_error; |
| |
| /** |
| * Creates the exception handle for the IDE application |
| * |
| * @param configurer an object for configuring the workbench |
| */ |
| public IDEExceptionHandler(IWorkbenchConfigurer configurer) { |
| super(); |
| workbenchConfigurer = configurer; |
| } |
| |
| /** |
| * Handles an event loop exception |
| * |
| * @param t the exception to handle |
| */ |
| public void handleException(Throwable t) { |
| try { |
| exceptionCount++; |
| if (exceptionCount > 1) { |
| if (closing) { |
| return; |
| } |
| Shell parent = defaultParent; |
| if (dialog != null && dialog.getShell() != null |
| && !dialog.getShell().isDisposed()) |
| parent = dialog.getShell(); |
| MessageBox box = new MessageBox(parent, SWT.ICON_ERROR |
| | SWT.YES | SWT.NO | SWT.SYSTEM_MODAL); |
| box.setText(MSG_FATAL_ERROR_RecursiveTitle); |
| box.setMessage(MessageFormat.format(MSG_FATAL_ERROR, |
| new Object[] { MSG_FATAL_ERROR_Recursive })); |
| int result = box.open(); |
| if (result == SWT.YES) { |
| closeWorkbench(); |
| } |
| } else { |
| if (openQuestionDialog(t)) { |
| closeWorkbench(); |
| } |
| } |
| } finally { |
| exceptionCount--; |
| } |
| } |
| |
| /** |
| * Close the workbench and make sure all exceptions are handled. |
| */ |
| private void closeWorkbench() { |
| if (closing) { |
| return; |
| } |
| |
| try { |
| closing = true; |
| if (dialog != null && dialog.getShell() != null |
| && !dialog.getShell().isDisposed()) |
| dialog.close(); |
| workbenchConfigurer.emergencyClose(); |
| } catch (RuntimeException re) { |
| // Workbench may be in such bad shape (no OS handles left, out of memory, etc) |
| // that is cannot even close. Just bail out now. |
| System.err |
| .println("Fatal runtime error happened during workbench emergency close."); //$NON-NLS-1$ |
| re.printStackTrace(); |
| throw re; |
| } catch (Error e) { |
| // Workbench may be in such bad shape (no OS handles left, out of memory, etc) |
| // that is cannot even close. Just bail out now. |
| System.err |
| .println("Fatal error happened during workbench emergency close."); //$NON-NLS-1$ |
| e.printStackTrace(); |
| throw e; |
| } |
| } |
| |
| /** |
| * Inform the user about a fatal error. Return true if the user decide to |
| * exit workbench or if another fatal error happens while reporting it. |
| */ |
| private boolean openQuestionDialog(Throwable internalError) { |
| try { |
| String msg = null; |
| if (internalError instanceof OutOfMemoryError) { |
| msg = MSG_OutOfMemoryError; |
| } else if (internalError instanceof StackOverflowError) { |
| msg = MSG_StackOverflowError; |
| } else if (internalError instanceof VirtualMachineError) { |
| msg = MSG_VirtualMachineError; |
| } else if (internalError instanceof SWTError) { |
| msg = MSG_SWTError; |
| } else { |
| if (internalError.getMessage() == null) { |
| msg = IDEWorkbenchMessages.InternalErrorNoArg; |
| } else { |
| msg = NLS.bind(IDEWorkbenchMessages.InternalErrorOneArg, internalError.getMessage()); |
| } |
| if (Policy.DEBUG_OPEN_ERROR_DIALOG) |
| return openQuestion(null, IDEWorkbenchMessages.Internal_error, msg, internalError, 1); |
| return false; |
| } |
| // Always open the dialog in case of major error but do not show the |
| // detail button if not in debug mode. |
| Throwable detail = internalError; |
| if (!Policy.DEBUG_OPEN_ERROR_DIALOG) |
| detail = null; |
| return InternalErrorDialog |
| .openQuestion(null, IDEWorkbenchMessages.Internal_error, |
| MessageFormat.format(MSG_FATAL_ERROR, |
| new Object[] { msg }), detail, 1); |
| } catch (Throwable th) { |
| // Workbench may be in such bad shape (no OS handles left, out of memory, etc) |
| // that is cannot show a message to the user. Just bail out now. |
| System.err |
| .println("Error while informing user about event loop exception:"); //$NON-NLS-1$ |
| internalError.printStackTrace(); |
| System.err.println("Dialog open exception:"); //$NON-NLS-1$ |
| th.printStackTrace(); |
| return true; |
| } |
| } |
| |
| private boolean openQuestion(Shell parent, String title, String message, |
| Throwable detail, int defaultIndex) { |
| String[] labels; |
| if (detail == null) |
| labels = new String[] { IDialogConstants.YES_LABEL, |
| IDialogConstants.NO_LABEL }; |
| else |
| labels = new String[] { IDialogConstants.YES_LABEL, |
| IDialogConstants.NO_LABEL, |
| IDialogConstants.SHOW_DETAILS_LABEL }; |
| |
| dialog = new InternalErrorDialog(parent, title, null, message, detail, |
| MessageDialog.QUESTION, labels, defaultIndex); |
| |
| if (detail != null) |
| dialog.setDetailButton(2); |
| boolean result = dialog.open() == Window.OK; |
| dialog = null; |
| return result; |
| } |
| } |