2 * ============LICENSE_START==========================================
4 * ===================================================================
5 * Copyright (c) 2017 AT&T Intellectual Property
6 * ===================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 * ============LICENSE_END=============================================
20 * ====================================================================
23 package org.onap.music.lockingservice;
25 import org.apache.zookeeper.KeeperException;
28 * A callback object which can be used for implementing retry-able operations in the
29 * {@link org.onap.music.lockingservice.ProtocolSupport} class
32 public interface ZooKeeperOperation {
35 * Performs the operation - which may be involved multiple times if the connection
36 * to ZooKeeper closes during this operation
38 * @return the result of the operation or null
39 * @throws KeeperException FILL IN
40 * @throws InterruptedException FILL IN
42 public boolean execute() throws KeeperException, InterruptedException;