001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.core.event;
020
021
022/**
023 * An event listener receives notifications from core components.
024 * <p>
025 * Notifications are expressed as Event objects. This type of listeners are always invoked synchronously immediately
026 * after the event is raised.
027 *
028 * @see PostCommitEventListener for asynchronous listeners or post commit listeners
029 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
030 */
031public interface EventListener {
032
033    /**
034     * Handle the given event. The listener can cancel the event by calling {@link Event#cancel()}
035     *
036     * @param event the event
037     */
038    void handleEvent(Event event);
039
040}