001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  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 */
017package org.apache.activemq.store.jdbc;
018
019import java.io.IOException;
020
021import org.apache.activemq.Service;
022
023/**
024 * Represents some kind of lock service to ensure that a broker is the only master
025 *
026 * @deprecated As of 5.7.0, use more general {@link org.apache.activemq.broker.Locker} instead
027 */
028@Deprecated
029public interface DatabaseLocker extends Service {
030
031    /**
032     * allow the injection of a jdbc persistence adapter
033     * @param adapter the persistence adapter to use
034     * @throws IOException 
035     */
036    void setPersistenceAdapter(JDBCPersistenceAdapter adapter) throws IOException;
037    
038    /**
039     * Used by a timer to keep alive the lock.
040     * If the method returns false the broker should be terminated
041     * if an exception is thrown, the lock state cannot be determined
042     */
043    boolean keepAlive() throws IOException;
044
045    /**
046     * set the delay interval in milliseconds between lock acquire attempts
047     * @param lockAcquireSleepInterval the sleep interval in miliseconds
048     */
049    void setLockAcquireSleepInterval(long lockAcquireSleepInterval);
050    
051}