| /* |
| * 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(); |
| } |