001    package org.apache.ojb.otm.lock.wait;
002    
003    /* Copyright 2003-2005 The Apache Software Foundation
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    import org.apache.ojb.otm.core.Transaction;
019    import org.apache.ojb.otm.lock.LockingException;
020    import org.apache.ojb.otm.lock.ObjectLock;
021    
022    /**
023     *
024     * LockWaitStrategy is responsible for waiting for a particular lock to be released. Typically, the
025     * LockWaitStrategy implements deadlock prevention/detection/recovery mechanisms.
026     *
027     * @author <a href="mailto:rraghuram@hotmail.com">Raghu Rajah</a>
028     *
029     */
030    public interface LockWaitStrategy
031    {
032        
033        /**
034         * @param lock The lock that the tx is waiting for
035         * @param tx The waiting tx
036         */
037        public void waitForLock(ObjectLock lock, Transaction tx)
038                throws LockingException;
039    }