storage-handlers/hbase/src/java/org/apache/hcatalog/hbase/snapshot/lock/LockListener.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hcatalog.hbase.snapshot.lock;

/**
 * This class has two methods which are call
 * back methods when a lock is acquired and
 * when the lock is released.
 *  This class has been used as-is from the zookeeper 3.3.4 recipes minor changes
 *  in the package name.
 */
public interface LockListener {
    /**
     * call back called when the lock
     * is acquired
     */
    public void lockAcquired();

    /**
     * call back called when the lock is
     * released.
     */
    public void lockReleased();
}