Examples with Compressor com.ms.silverking.compression.Compressor used on opensource projects

Example 1 with Compressor

use of com.ms.silverking.compression.Compressor in project SilverKing by Morgan-Stanley.

the class AsyncPutOperationImpl method segment.

private void segment(K key, List<MessageGroup> messageGroups) {
    int numSegments;
    int valueSize;
    DHTKey dhtKey;
    DHTKey[] subKeys;
    ByteBuffer buf;
    ByteBuffer[] subBufs;
    ProtoPutMessageGroup<V> protoPutMG;
    Compression compression;
    SegmentedPutValue segmentedPutValue;
    boolean listenerInserted;
    int uncompressedLength;
    int storedLength;
    byte[] checksum;
    Log.fine("segmenting: ", key);
    // Serialize the value and compress if needed
    buf = nspoImpl.getValueSerializer().serializeToBuffer(putOperation.getValue(key));
    uncompressedLength = buf.limit();
    compression = putOperation.putOptions().getCompression();
    if (compression != Compression.NONE) {
        Compressor compressor;
        byte[] compressedValue;
        compressor = CodecProvider.getCompressor(compression);
        try {
            compressedValue = compressor.compress(buf.array(), buf.position(), buf.remaining());
            buf = ByteBuffer.wrap(compressedValue);
        } catch (IOException ioe) {
            throw new RuntimeException("Compression error in segmentation", ioe);
        }
    }
    storedLength = buf.limit();
    // Checksum the value
    // For segmented values we do not compute a complete checksum, but
    // instead we use the piecewise checksums. The primary reason for this is to allow for the
    // standard corrupt value detection/correction code to work for segmented values.
    checksum = new byte[putOperation.putOptions().getChecksumType().length()];
    // Now segment the value
    valueSize = buf.limit();
    numSegments = SegmentationUtil.getNumSegments(valueSize, SegmentationUtil.maxValueSegmentSize);
    segmentsCreated += numSegments;
    subBufs = new ByteBuffer[numSegments];
    for (int i = 0; i < numSegments; i++) {
        ByteBuffer subBuf;
        int segmentStart;
        int segmentSize;
        segmentStart = i * SegmentationUtil.maxValueSegmentSize;
        segmentSize = Math.min(SegmentationUtil.maxValueSegmentSize, valueSize - segmentStart);
        buf.position(segmentStart);
        subBuf = buf.slice();
        subBuf.limit(segmentSize);
        subBufs[i] = subBuf;
        if (debugSegmentation) {
            System.out.printf("%d\t%d\t%s\n", segmentStart, segmentSize, subBufs[i]);
        }
    }
    dhtKey = keyCreator.createKey(key);
    subKeys = keyCreator.createSubKeys(dhtKey, numSegments);
    if (segmentedPutValues == null) {
        segmentedPutValues = new LinkedList<>();
    }
    segmentedPutValue = new SegmentedPutValue(subKeys, dhtKey, this);
    segmentedPutValues.add(segmentedPutValue);
    // For now, assume only one segment per message
    for (int i = 0; i < numSegments; i++) {
        byte[] segmentChecksum;
        protoPutMG = createProtoPutMG(new PutMessageEstimate(1, subBufs[i].limit()));
        // hold a reference to the uuid to prevent GC
        opUUIDs.add((OperationUUID) protoPutMG.getUUID());
        listenerInserted = activePutListeners.addListener(protoPutMG.getUUID(), subKeys[i], segmentedPutValue);
        if (!listenerInserted) {
            throw new RuntimeException("Panic: Unable to insert listener into dedicated segment protoPutMG");
        }
        if (debugSegmentation) {
            System.out.printf("segmentation listener: %s\t%s\t%s\n", protoPutMG.getUUID(), subKeys[i], subBufs[i]);
        // System.out.printf("segmentation listener: %s\t%s\t%s\n",
        // protoPutMG.getUUID(), subKeys[i], StringUtil.byteBufferToHexString(subBufs[i]));
        }
        protoPutMG.addValueDedicated(subKeys[i], subBufs[i]);
        protoPutMG.addToMessageGroupList(messageGroups);
        segmentChecksum = new byte[putOperation.putOptions().getChecksumType().length()];
        protoPutMG.getMostRecentChecksum(segmentChecksum);
        ArrayUtil.xor(checksum, segmentChecksum);
    }
    // Now add the index key/value
    // indicate segmentation by storing segmentationBytes in the creator field
    protoPutMG = createProtoPutMG(new PutMessageEstimate(1, SegmentationUtil.segmentedValueBufferLength), MetaDataConstants.segmentationBytes);
    // hold a reference to the uuid to prevent GC
    opUUIDs.add((OperationUUID) protoPutMG.getUUID());
    listenerInserted = activePutListeners.addListener(protoPutMG.getUUID(), dhtKey, segmentedPutValue);
    if (!listenerInserted) {
        throw new RuntimeException("Panic: Unable to add index key/value into dedicated protoPutMG");
    }
    if (debug) {
        System.out.printf("added index listener %s %s\n", protoPutMG.getUUID(), new SimpleKey(dhtKey));
    }
    ByteBuffer segmentMetaDataBuffer;
    segmentMetaDataBuffer = SegmentationUtil.createSegmentMetaDataBuffer(DHTClient.getValueCreator().getBytes(), storedLength, uncompressedLength, putOperation.putOptions().getChecksumType(), checksum);
    protoPutMG.addValueDedicated(dhtKey, segmentMetaDataBuffer);
    protoPutMG.addToMessageGroupList(messageGroups);
}