2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END=========================================================
22 package org.onap.ccsdk.sli.adaptors.lock.comp;
24 import java.security.SecureRandom;
25 import java.util.Collection;
26 import java.util.HashSet;
29 public abstract class SynchronizedFunction {
31 private Set<String> synchset;
32 private String lockRequester;
33 private int lockTimeout; // Seconds
34 private LockHelper lockHelper;
36 protected SynchronizedFunction(LockHelper lockHelper, Collection<String> synchset, int lockTimeout) {
37 this.lockHelper = lockHelper;
38 this.synchset = new HashSet<String>(synchset);
39 this.lockRequester = generateLockRequester();
40 this.lockTimeout = lockTimeout;
43 protected abstract void _exec();
46 lockHelper.lock(synchset, lockRequester, lockTimeout);
50 lockHelper.unlock(synchset, true);
54 private static String generateLockRequester() {
55 SecureRandom rand = new SecureRandom();
56 return "SynchronizedFunction-" + (int) (rand.nextDouble() * 1000000);