Examples with DataPacker edu.iu.dsc.tws.api.comms.packing.DataPacker used on opensource projects

Example 6 with DataPacker

use of edu.iu.dsc.tws.api.comms.packing.DataPacker in project twister2 by DSC-SPIDAL.

the class KeyedDataDeSerializer method build.

/**
 * Builds the message from the data buffers in the partialObject. Since this method
 * supports multi-messages it iterates through the buffers and builds all the messages separately
 *
 * @param partialObject message object that needs to be built
 * @param edge the edge value associated with this message
 */
@Override
public void build(Object partialObject, int edge) {
    InMessage currentMessage = (InMessage) partialObject;
    MessageType keyType = currentMessage.getKeyType();
    DataPacker keyPacker = keyType.getDataPacker();
    DataPacker dataPacker = currentMessage.getDataType().getDataPacker();
    Queue<DataBuffer> buffers = currentMessage.getBuffers();
    MessageHeader header = currentMessage.getHeader();
    if (header == null) {
        throw new RuntimeException("Header must be built before the message");
    }
    if ((header.getFlags() & MessageFlags.SYNC_BARRIER) == MessageFlags.SYNC_BARRIER) {
        keyType = MessageTypes.BYTE_ARRAY;
        keyPacker = MessageTypes.BYTE_ARRAY.getDataPacker();
        dataPacker = keyPacker;
    }
    List<DataBuffer> builtBuffers = new ArrayList<>();
    // get the number of objects deserialized
    DataBuffer buffer = buffers.peek();
    while (buffer != null) {
        int currentLocation = 0;
        int remaining = buffer.getSize();
        if (header.getNumberTuples() == 0) {
            builtBuffers.add(buffer);
            break;
        }
        // if we are at the beginning
        int currentObjectLength = currentMessage.getUnPkCurrentObjectLength();
        int currentKeyLength = currentMessage.getUnPkCurrentKeyLength();
        if (currentMessage.getUnPkBuffers() == 0) {
            currentLocation = DFWIOUtils.HEADER_SIZE;
            remaining = remaining - DFWIOUtils.HEADER_SIZE;
        } else {
            currentLocation = DFWIOUtils.SHORT_HEADER_SIZE;
            remaining = remaining - DFWIOUtils.SHORT_HEADER_SIZE;
        }
        if (currentObjectLength == -1 || currentMessage.getUnPkBuffers() == 0) {
            currentObjectLength = buffer.getByteBuffer().getInt(currentLocation);
            remaining = remaining - Integer.BYTES;
            currentLocation += Integer.BYTES;
        }
        if (currentKeyLength == -1) {
            // we assume we can read the key length from here
            int right = DataPackerProxy.getKeyLengthRight(keyType, buffer, currentLocation);
            int left = DataPackerProxy.getKeyLengthLeft(keyType, buffer, currentLocation);
            remaining = remaining - right;
            currentLocation += right;
            // we have to set the current object length
            currentObjectLength = currentObjectLength - left - right;
            currentKeyLength = left;
            currentMessage.getKeyBuilder().init(keyPacker, currentKeyLength);
            try {
                currentMessage.getDataBuilder().init(dataPacker, currentObjectLength);
                currentMessage.setUnPkCurrentKeyLength(currentKeyLength);
                currentMessage.setUnPkCurrentObjectLength(currentObjectLength);
                // we are going to read the key first
                currentMessage.setReadingKey(true);
            } catch (NegativeArraySizeException e) {
                throw new RuntimeException(e);
            }
        }
        while (remaining > 0) {
            if (currentMessage.isReadingKey()) {
                ObjectBuilderImpl keyBuilder = currentMessage.getKeyBuilder();
                int bytesRead = keyPacker.readDataFromBuffer(keyBuilder, currentLocation, buffer);
                keyBuilder.incrementCompletedSizeBy(bytesRead);
                currentLocation += bytesRead;
                remaining = remaining - bytesRead;
                currentMessage.setReadingKey(!keyBuilder.isBuilt());
                if (keyBuilder.isBuilt()) {
                    // done reading key
                    currentMessage.setReadingKey(false);
                } else {
                    break;
                }
            }
            if (!currentMessage.isReadingKey()) {
                ObjectBuilderImpl dataBuilder = currentMessage.getDataBuilder();
                // read the values from the buffer
                int byteRead = dataPacker.readDataFromBuffer(dataBuilder, currentLocation, buffer);
                dataBuilder.incrementCompletedSizeBy(byteRead);
                currentLocation += byteRead;
                remaining = remaining - byteRead;
                // okay we are done with this object
                if (dataBuilder.isBuilt()) {
                    // lets add the object
                    currentMessage.addCurrentKeyedObject();
                } else {
                    // lets break the inner while loop
                    break;
                }
                int bytesToReadKey = 0;
                if (keyPacker.isHeaderRequired()) {
                    bytesToReadKey += Integer.BYTES;
                }
                if (remaining >= Integer.BYTES + bytesToReadKey) {
                    currentObjectLength = buffer.getByteBuffer().getInt(currentLocation);
                    remaining = remaining - Integer.BYTES;
                    currentLocation += Integer.BYTES;
                    // we assume we can read the key length from here
                    int right = DataPackerProxy.getKeyLengthRight(keyType, buffer, currentLocation);
                    int left = DataPackerProxy.getKeyLengthLeft(keyType, buffer, currentLocation);
                    remaining = remaining - right;
                    currentLocation += right;
                    // we have to set the current object length
                    currentObjectLength = currentObjectLength - left - right;
                    currentKeyLength = left;
                    currentMessage.getKeyBuilder().init(keyPacker, currentKeyLength);
                    currentMessage.getDataBuilder().init(dataPacker, currentObjectLength);
                    currentMessage.setUnPkCurrentKeyLength(currentKeyLength);
                    currentMessage.setUnPkCurrentObjectLength(currentObjectLength);
                    // we are going to read the key first
                    currentMessage.setReadingKey(true);
                } else if (remaining >= Integer.BYTES) {
                    currentObjectLength = buffer.getByteBuffer().getInt(currentLocation);
                    remaining = remaining - Integer.BYTES;
                    currentLocation += Integer.BYTES;
                    currentMessage.setUnPkCurrentObjectLength(currentObjectLength);
                    currentMessage.setUnPkCurrentKeyLength(-1);
                    currentMessage.setReadingKey(true);
                } else {
                    // we have to break here as we cannot read further
                    break;
                }
            }
        }
        // lets remove this buffer
        buffers.poll();
        builtBuffers.add(buffer);
        // increment the unpacked buffers
        currentMessage.incrementUnPkBuffers();
        // lets check weather we have read everythong
        int readObjectNumber = currentMessage.getUnPkNumberObjects();
        // we need to get number of tuples and get abs because we are using -1 for single messages
        if (readObjectNumber == Math.abs(currentMessage.getHeader().getNumberTuples())) {
            break;
        }
        // lets move to next
        buffer = buffers.peek();
    }
    if (builtBuffers.size() > 0) {
        ChannelMessage channelMessage = new ChannelMessage(currentMessage.getOriginatingId(), currentMessage.getDataType(), MessageDirection.IN, currentMessage.getReleaseListener());
        channelMessage.addBuffers(builtBuffers);
        channelMessage.setHeader(currentMessage.getHeader());
        channelMessage.incrementRefCount();
        currentMessage.addBuiltMessage(channelMessage);
    }
}