hudson.model.FingerprintCleanupThread Maven / Gradle / Ivy
package hudson.model;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.regex.Pattern;
/**
* Scans the fingerprint database and remove old records
* that are no longer relevant.
*
*
* A {@link Fingerprint} is removed when none of the builds that
* it point to is available in the records.
*
* @author Kohsuke Kawaguchi
*/
public final class FingerprintCleanupThread extends PeriodicWork {
private static FingerprintCleanupThread theInstance;
public FingerprintCleanupThread() {
super("Fingerprint cleanup");
theInstance = this;
}
public static void invoke() {
theInstance.run();
}
protected void execute() {
int numFiles = 0;
File root = new File(Hudson.getInstance().getRootDir(),"fingerprints");
File[] files1 = root.listFiles(LENGTH2DIR_FILTER);
if(files1!=null) {
for (File file1 : files1) {
File[] files2 = file1.listFiles(LENGTH2DIR_FILTER);
for(File file2 : files2) {
File[] files3 = file2.listFiles(FINGERPRINTFILE_FILTER);
for(File file3 : files3) {
if(check(file3))
numFiles++;
}
deleteIfEmpty(file2);
}
deleteIfEmpty(file1);
}
}
logger.log(Level.INFO, "Cleaned up "+numFiles+" records");
}
/**
* Deletes a directory if it's empty.
*/
private void deleteIfEmpty(File dir) {
String[] r = dir.list();
if(r==null) return; // can happen in a rare occasion
if(r.length==0)
dir.delete();
}
/**
* Examines the file and returns true if a file was deleted.
*/
private boolean check(File fingerprintFile) {
try {
Fingerprint fp = Fingerprint.load(fingerprintFile);
if(!fp.isAlive()) {
fingerprintFile.delete();
return true;
}
} catch (IOException e) {
logger.log(Level.WARNING, "Failed to process "+fingerprintFile, e);
}
return false;
}
private static final FileFilter LENGTH2DIR_FILTER = new FileFilter() {
public boolean accept(File f) {
return f.isDirectory() && f.getName().length()==2;
}
};
private static final FileFilter FINGERPRINTFILE_FILTER = new FileFilter() {
private final Pattern PATTERN = Pattern.compile("[0-9a-f]{28}\\.xml");
public boolean accept(File f) {
return f.isFile() && PATTERN.matcher(f.getName()).matches();
}
};
}