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Java > Open Source Codes > org > jboss > ejb > BeanLockExt


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ejb;
23
24 /** An extension of the BeanLock interface that adds support for non-blocking
25  * acquisition of a lock.
26  *
27  * @author Scott.Stark@jboss.org
28  * @version $Revision: 37459 $
29  */
30 public interface BeanLockExt extends BeanLock
31 {
32    /**
33     * A non-blocking method that checks if the calling thread will be able
34     * to acquire the sync lock based on the calling thread.
35     *
36     * @return true if the calling thread can obtain the sync lock in which
37     * case it will, false if another thread already has the lock.
38     */
39    public boolean attemptSync();
40 }
41
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