@Override
    public void touch(File file) throws IOException {
        workerThread.submit(new TouchCallable(file));
    }
{@link DiskUsage} that uses LRU (Least Recently Used) strategy to trim cache.

@author Alexey Danilov (danikula@gmail.com).
dkplayer-videocache/src/main/java/com/danikula/videocache/file/LruDiskUsage.java