package com.ning.compress.lzf.parallel;
import java.util.concurrent.Callable;
import com.ning.compress.lzf.ChunkEncoder;
import com.ning.compress.lzf.LZFChunk;
import com.ning.compress.lzf.util.ChunkEncoderFactory;
/**
* @author Cédrik LIME
*/
class CompressTask implements Callable<LZFChunk> {
private static final ThreadLocal<ChunkEncoder> ENCODER = new ThreadLocal<ChunkEncoder>() {
@Override
protected ChunkEncoder initialValue() {
return ChunkEncoderFactory.optimalInstance();
}
};
protected byte[] data;
protected int offset, length;
protected BlockManager blockManager;
public CompressTask(byte[] input, int offset, int length, BlockManager blockManager) {
super();
this.data = input;
this.offset = offset;
this.length = length;
this.blockManager = blockManager;
}
public CompressTask(byte[] input, BlockManager blockManager) {
this(input, 0, input.length, blockManager);
}
/** {@inheritDoc} */
@Override
public LZFChunk call() {
if (data != null) {
LZFChunk lzfChunk = ENCODER.get().encodeChunk(data, offset, length);
// input data is fully processed, we can now discard it
blockManager.releaseBlockToPool(data);
return lzfChunk;
} else {
// cleanup time!
ENCODER.remove();
return null;
}
}
}