2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017-2018 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=========================================================
21 package org.onap.aai.auth;
24 import java.util.TimerTask;
26 public abstract class FileWatcher extends TimerTask {
27 private long timeStamp;
31 * Instantiates a new file watcher.
33 * @param file the file
35 public FileWatcher(File file) {
37 this.timeStamp = file.lastModified();
43 * @see java.util.TimerTask.run
46 public final void run() {
47 long newTimestamp = file.lastModified();
49 if ((newTimestamp - this.timeStamp) > 500) {
50 this.timeStamp = newTimestamp;
58 * @param file the file
60 protected abstract void onChange(File file);