| /******************************************************************************* |
| * Copyright (c) 2013 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.e4.tools.event.spy.core; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.eclipse.e4.core.services.events.IEventBroker; |
| import org.eclipse.e4.tools.event.spy.model.CapturedEvent; |
| import org.eclipse.e4.tools.event.spy.model.CapturedEventFilter; |
| import org.eclipse.e4.ui.internal.workbench.UIEventPublisher; |
| import org.eclipse.e4.ui.services.internal.events.EventBroker; |
| import org.eclipse.e4.ui.workbench.UIEvents; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventHandler; |
| |
| @SuppressWarnings("restriction") |
| public class EventMonitor { |
| |
| public interface NewEventListener { |
| void newEvent(CapturedEvent event); |
| } |
| |
| private final static String TOPIC = UIEvents.UITopicBase + UIEvents.TOPIC_SEP + UIEvents.ALL_SUB_TOPICS; |
| |
| @SuppressWarnings({"serial"}) |
| private static Set<Integer> EVENT_HELPER_CLASSES = new HashSet<Integer>() {{ |
| add(UIEvents.class.getName().hashCode()); |
| add(UIEventPublisher.class.getName().hashCode()); |
| }}; |
| |
| private Collection<CapturedEventFilter> filters; |
| |
| private final IEventBroker eventBroker; |
| |
| private NewEventListener listener; |
| |
| private CapturedEventFilterMatcher eventFilterMatcher; |
| |
| private final EventHandler eventHandler = new EventHandler() { |
| public void handleEvent(Event event) { |
| if (listener == null) { |
| return; |
| } |
| |
| CapturedEvent capturedEvent = new CapturedEvent(); |
| capturedEvent.setTopic(event.getTopic()); |
| capturedEvent.setPublisherClassName(getPublisherClassName()); |
| |
| for (String propertyName: event.getPropertyNames()) { |
| Object value = event.getProperty(propertyName); |
| capturedEvent.addParameter(propertyName, value); |
| if (value != null && UIEvents.EventTags.ELEMENT.equals(propertyName)) { |
| capturedEvent.setChangedElementClassName(value.getClass().getName()); |
| } |
| } |
| |
| if (shouldBeCaptured(capturedEvent)) { |
| listener.newEvent(capturedEvent); |
| } |
| } |
| }; |
| |
| public EventMonitor(IEventBroker eventBroker) { |
| this.eventBroker = eventBroker; |
| } |
| |
| public void start(Collection<CapturedEventFilter> filters) { |
| this.filters = filters; |
| eventBroker.subscribe(TOPIC, eventHandler); |
| } |
| |
| public void stop() { |
| eventBroker.unsubscribe(eventHandler); |
| } |
| |
| public void setNewEventListener(NewEventListener listener) { |
| this.listener = listener; |
| } |
| |
| private boolean shouldBeCaptured(CapturedEvent event) { |
| if (filters != null) { |
| Iterator<CapturedEventFilter> iter = filters.iterator(); |
| while (iter.hasNext()) { |
| if (!getEventFilterMatcher().matches(event, iter.next())) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| private String getPublisherClassName() { |
| StackTraceElement items[] = Thread.currentThread().getStackTrace(); |
| boolean foundEventBroker = false; |
| |
| for (int i=0; i<items.length; i++) { |
| String clsName = items[i].getClassName(); |
| if (!foundEventBroker && clsName.equals(EventBroker.class.getName())) { |
| foundEventBroker = true; |
| } else if (foundEventBroker) { |
| if (!EVENT_HELPER_CLASSES.contains(clsName.hashCode())) { |
| return String.format("%s (%s:%d)", clsName, items[i].getMethodName(), items[i].getLineNumber()); |
| } |
| } |
| } |
| return ""; |
| } |
| |
| private CapturedEventFilterMatcher getEventFilterMatcher() { |
| if (eventFilterMatcher == null) { |
| eventFilterMatcher = new CapturedEventFilterMatcher(); |
| } |
| return eventFilterMatcher; |
| } |
| } |