2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2019 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017-2019 European Software Marketing Ltd.
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.aai.auth;
25 import java.util.TimerTask;
27 public abstract class FileWatcher extends TimerTask {
28 private long timeStamp;
32 * Instantiates a new file watcher.
34 * @param file the file
36 public FileWatcher(File file) {
38 this.timeStamp = file.lastModified();
44 * @see java.util.TimerTask.run
47 public final void run() {
48 long newTimestamp = file.lastModified();
50 if ((newTimestamp - this.timeStamp) > 500) {
51 this.timeStamp = newTimestamp;
59 * @param file the file
61 protected abstract void onChange(File file);