io.hawt.util.FileLocker Maven / Gradle / Ivy
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package io.hawt.util;
import java.io.File;
import java.io.IOException;
/**
* A simple API to a file lock
*/
public class FileLocker {
private final File lockFile;
/**
* Attempts to grab the lock for the given file, returning a FileLock if
* the lock has been created; otherwise it returns null
*/
public static FileLocker getLock(File lockFile) {
lockFile.getParentFile().mkdirs();
if (!lockFile.exists()) {
try {
IOHelper.write(lockFile, "I have the lock!");
lockFile.deleteOnExit();
return new FileLocker(lockFile);
} catch (IOException e) {
// Ignore
}
}
return null;
}
public FileLocker(File lockFile) {
this.lockFile = lockFile;
}
@Override
public String toString() {
return "FileLock(" + lockFile + ")";
}
public void destroy() {
if (lockFile.exists()) {
lockFile.delete();
}
}
}