flex.messaging.util.WatchedObject Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package flex.messaging.util;
import java.io.File;
import java.io.FileNotFoundException;
/**
* Used by redeployment manager to monitor for changes to the files.
*
*
*/
public class WatchedObject
{
private String filename;
private long modified;
/**
* Creates a watched object for the specified file.
*
* @param filename file to watch
* @throws FileNotFoundException when specified file could not be found
*/
public WatchedObject(String filename) throws FileNotFoundException
{
this.filename = filename;
File file = new File(filename);
if (!file.isFile() && !file.isDirectory())
{
throw new FileNotFoundException();
}
this.modified = file.lastModified();
}
/**
* Returns true if the watched file has been modified since creation of this
* watched object or since the last call to this method.
*
* @return true if the watched file has been modified since creation of this
* watched object or since the last call to this method
*/
public boolean isUptodate()
{
boolean uptodate = true;
long current = new File(filename).lastModified();
if (Math.abs(current - modified) > 1000)
{
uptodate = false;
}
modified = current;
return uptodate;
}
}