| /* | |
| * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| package java.awt; | |
| /** | |
| * An interface for events that know how to dispatch themselves. | |
| * By implementing this interface an event can be placed upon the event | |
| * queue and its {@code dispatch()} method will be called when the event | |
| * is dispatched, using the {@code EventDispatchThread}. | |
| * <p> | |
| * This is a very useful mechanism for avoiding deadlocks. If | |
| * a thread is executing in a critical section (i.e., it has entered | |
| * one or more monitors), calling other synchronized code may | |
| * cause deadlocks. To avoid the potential deadlocks, an | |
| * {@code ActiveEvent} can be created to run the second section of | |
| * code at later time. If there is contention on the monitor, | |
| * the second thread will simply block until the first thread | |
| * has finished its work and exited its monitors. | |
| * <p> | |
| * For security reasons, it is often desirable to use an {@code ActiveEvent} | |
| * to avoid calling untrusted code from a critical thread. For | |
| * instance, peer implementations can use this facility to avoid | |
| * making calls into user code from a system thread. Doing so avoids | |
| * potential deadlocks and denial-of-service attacks. | |
| * | |
| * @author Timothy Prinzing | |
| * @since 1.2 | |
| */ | |
| public interface ActiveEvent { | |
| /** | |
| * Dispatch the event to its target, listeners of the events source, | |
| * or do whatever it is this event is supposed to do. | |
| */ | |
| public void dispatch(); | |
| } |