org.duracloud.sync.walker.RestartDirWalker Maven / Gradle / Ivy
/*
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://duracloud.org/license/
*/
package org.duracloud.sync.walker;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Walks a set of directory trees just like a DirWalker, but only adds files
* to the changed list if their modified date is more recent than the time of
* the last backup. This provides a listing of files which have been added or
* updated since the last backup.
*
* All files in directories which have changed are added to the changed list as
* well in order to handle the possibility of directory names having been
* changed.
*
* @author: Bill Branan
* Date: Mar 24, 2010
*/
public class RestartDirWalker extends DirWalker {
private long lastBackup;
private List changedDirs;
private File excludeFile;
protected RestartDirWalker(List topDirs,
File excludeFile,
long lastBackup) {
super(topDirs, excludeFile);
this.excludeFile = excludeFile;
this.lastBackup = lastBackup;
changedDirs = new ArrayList();
}
@Override
protected void walkDirs() {
super.walkDirs();
// Walk and add all files in directories which have changed
if(changedDirs.size() > 0) {
DirWalker dirWalker = new DirWalker(changedDirs, excludeFile);
dirWalker.walkDirs();
}
}
@Override
protected void handleFile(File file, int depth, Collection results) {
if(file.lastModified() > lastBackup) {
super.handleFile(file, depth, results);
}
}
@Override
protected boolean handleDirectory(File directory,
int depth,
Collection results) {
if(directory.lastModified() > lastBackup) {
changedDirs.add(directory);
}
return true;
}
public static DirWalker start(List topDirs,
File excludeFile,
long lastBackup) {
RestartDirWalker dirWalker =
new RestartDirWalker(topDirs, excludeFile, lastBackup);
(new Thread(dirWalker)).start();
return dirWalker;
}
}