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/*******************************************************************************
* Copyright (c) 2000, 2008 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
* Chris Gross (schtoo@schtoo.com) - support for ISafeRunnableRunner added
* (bug 49497 [RCP] JFace dependency on org.eclipse.core.runtime enlarges standalone JFace applications)
*******************************************************************************/
package org.eclipse.jface.util;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.JFaceResources;
/**
* Implements a default implementation of ISafeRunnable. The default
* implementation of <code>handleException</code> opens a dialog to show any
* errors as they accumulate.
* <p>
* This may be executed on any thread.
*/
public abstract class SafeRunnable implements ISafeRunnable {
private static boolean ignoreErrors = false;
private static ISafeRunnableRunner runner;
private String message;
/**
* Creates a new instance of SafeRunnable with a default error message.
*/
public SafeRunnable() {
// do nothing
}
/**
* Creates a new instance of SafeRunnable with the given error message.
*
* @param message
* the error message to use
*/
public SafeRunnable(String message) {
this.message = message;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.core.runtime.ISafeRunnable#handleException(java.lang.Throwable)
*/
public void handleException(Throwable e) {
// Workaround to avoid interactive error dialogs during
// automated testing
if (ignoreErrors)
return;
if (message == null)
message = JFaceResources.getString("SafeRunnable.errorMessage"); //$NON-NLS-1$
Policy.getStatusHandler().show(
new Status(IStatus.ERROR, Policy.JFACE, message, e),
JFaceResources.getString("SafeRunnable.errorMessage")); //$NON-NLS-1$
}
/**
* Flag to avoid interactive error dialogs during automated testing.
*
* @param flag
* @return true if errors should be ignored
* @deprecated use getIgnoreErrors()
*/
@Deprecated
public static boolean getIgnoreErrors(boolean flag) {
return ignoreErrors;
}
/**
* Flag to avoid interactive error dialogs during automated testing.
*
* @return true if errors should be ignored
*
* @since 3.0
*/
public static boolean getIgnoreErrors() {
return ignoreErrors;
}
/**
* Flag to avoid interactive error dialogs during automated testing.
*
* @param flag
* set to true if errors should be ignored
*/
public static void setIgnoreErrors(boolean flag) {
ignoreErrors = flag;
}
/**
* Returns the safe runnable runner.
*
* @return the safe runnable runner
*
* @since 3.1
*/
public static ISafeRunnableRunner getRunner() {
if (runner == null) {
runner = createDefaultRunner();
}
return runner;
}
/**
* Creates the default safe runnable runner.
*
* @return the default safe runnable runner
* @since 3.1
*/
private static ISafeRunnableRunner createDefaultRunner() {
return new ISafeRunnableRunner() {
public void run(ISafeRunnable code) {
try {
code.run();
} catch (Exception e) {
handleException(code, e);
} catch (LinkageError e) {
handleException(code, e);
}
}
private void handleException(ISafeRunnable code, Throwable e) {
if (!(e instanceof OperationCanceledException)) {
try {
Policy.getLog()
.log(
new Status(IStatus.ERROR, Policy.JFACE,
IStatus.ERROR,
"Exception occurred", e)); //$NON-NLS-1$
} catch (Exception ex) {
e.printStackTrace();
}
}
code.handleException(e);
}
};
}
/**
* Sets the safe runnable runner.
*
* @param runner
* the runner to set, or <code>null</code> to reset to the
* default runner
* @since 3.1
*/
public static void setRunner(ISafeRunnableRunner runner) {
SafeRunnable.runner = runner;
}
/**
* Runs the given safe runnable using the safe runnable runner. This is a
* convenience method, equivalent to:
* <code>SafeRunnable.getRunner().run(runnable)</code>.
*
* @param runnable
* the runnable to run
* @since 3.1
*/
public static void run(ISafeRunnable runnable) {
getRunner().run(runnable);
}
}
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