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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2019 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2019 European Software Marketing Ltd.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.auth;
import java.io.File;
import java.util.TimerTask;
public abstract class FileWatcher extends TimerTask {
private long timeStamp;
private File file;
/**
* Instantiates a new file watcher.
*
* @param file the file
*/
protected FileWatcher(File file) {
this.file = file;
this.timeStamp = file.lastModified();
}
/**
* runs a timer task
*
* @see java.util.TimerTask.run
*/
@Override
public final void run() {
long newTimestamp = file.lastModified();
if ((newTimestamp - this.timeStamp) > 500) {
this.timeStamp = newTimestamp;
onChange(file);
}
}
/**
* On change.
*
* @param file the file
*/
protected abstract void onChange(File file);
}
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