Mercurial > projects > dwt-addons
view dwtx/core/internal/runtime/RuntimeLog.d @ 122:9d0585bcb7aa
Add core.jobs package
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 12 Aug 2008 02:34:21 +0200 |
parents | |
children | 00f8787f4742 |
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/******************************************************************************* * Copyright (c) 2000, 2006 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 * Julian Chen - fix for bug #92572, jclRM * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.core.internal.runtime.RuntimeLog; import dwt.dwthelper.utils; import dwtx.dwtxhelper.Collection; import dwtx.core.runtime.ILogListener; import dwtx.core.runtime.IStatus; import dwtx.core.runtime.OperationCanceledException; /** * NOT API!!! This log infrastructure was split from the InternalPlatform. * * @since dwtx.equinox.common 3.2 */ // XXX this must be removed and replaced with something more reasonable public final class RuntimeLog { private static ArrayList logListeners = new ArrayList(5); /** * Keep the messages until the first log listener is registered. * Once first log listeners is registred, it is going to receive * all status messages accumulated during the period when no log * listener was available. */ private static ArrayList queuedMessages = new ArrayList(5); /** * See dwtx.core.runtime.Platform#addLogListener(ILogListener) */ public static void addLogListener(ILogListener listener) { synchronized (logListeners) { bool firstListener = (logListeners.size() is 0); // replace if already exists (Set behaviour but we use an array // since we want to retain order) logListeners.remove(listener); logListeners.add(listener); if (firstListener) { for (Iterator i = queuedMessages.iterator(); i.hasNext();) { try { IStatus recordedMessage = cast(IStatus) i.next(); listener.logging(recordedMessage, IRuntimeConstants.PI_RUNTIME); } catch (Exception e) { handleException(e); } catch (LinkageError e) { handleException(e); } } queuedMessages.clear(); } } } /** * See dwtx.core.runtime.Platform#removeLogListener(ILogListener) */ public static void removeLogListener(ILogListener listener) { synchronized (logListeners) { logListeners.remove(listener); } } /** * Checks if the given listener is present */ public static bool contains(ILogListener listener) { synchronized (logListeners) { return logListeners.contains(listener); } } /** * Notifies all listeners of the platform log. */ public static void log(IStatus status) { // create array to avoid concurrent access ILogListener[] listeners; synchronized (logListeners) { listeners = arraycast!(ILogListener)( logListeners.toArray()); if (listeners.length is 0) { queuedMessages.add(status); return; } } for (int i = 0; i < listeners.length; i++) { try { listeners[i].logging(status, IRuntimeConstants.PI_RUNTIME); } catch (Exception e) { handleException(e); } catch (LinkageError e) { handleException(e); } } } private static void handleException(Exception e) { if (!(cast(OperationCanceledException)e )) { // Got a error while logging. Don't try to log again, just put it into stderr ExceptionPrintStackTrace(e); } } /** * Helps determine if any listeners are registered with the logging mechanism. * @return true if no listeners are registered */ public static bool isEmpty() { synchronized (logListeners) { return (logListeners.size() is 0); } } }