Examples with IResultSerializer org.apache.hyracks.api.dataflow.value.IResultSerializer used on opensource projects

Example 1 with IResultSerializer

use of org.apache.hyracks.api.dataflow.value.IResultSerializer in project asterixdb by apache.

the class ResultWriterOperatorDescriptor method createPushRuntime.

@Override
public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx, IRecordDescriptorProvider recordDescProvider, final int partition, final int nPartitions) throws HyracksDataException {
    final IDatasetPartitionManager dpm = ctx.getDatasetPartitionManager();
    final IFrame frame = new VSizeFrame(ctx);
    final FrameOutputStream frameOutputStream = new FrameOutputStream(ctx.getInitialFrameSize());
    frameOutputStream.reset(frame, true);
    PrintStream printStream = new PrintStream(frameOutputStream);
    final RecordDescriptor outRecordDesc = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0);
    final IResultSerializer resultSerializer = resultSerializerFactory.createResultSerializer(outRecordDesc, printStream);
    final FrameTupleAccessor frameTupleAccessor = new FrameTupleAccessor(outRecordDesc);
    return new AbstractUnaryInputSinkOperatorNodePushable() {

        private IFrameWriter datasetPartitionWriter;

        private boolean failed = false;

        @Override
        public void open() throws HyracksDataException {
            try {
                datasetPartitionWriter = dpm.createDatasetPartitionWriter(ctx, rsId, ordered, asyncMode, partition, nPartitions);
                datasetPartitionWriter.open();
                resultSerializer.init();
            } catch (HyracksException e) {
                throw HyracksDataException.create(e);
            }
        }

        @Override
        public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
            frameTupleAccessor.reset(buffer);
            for (int tIndex = 0; tIndex < frameTupleAccessor.getTupleCount(); tIndex++) {
                resultSerializer.appendTuple(frameTupleAccessor, tIndex);
                if (!frameOutputStream.appendTuple()) {
                    frameOutputStream.flush(datasetPartitionWriter);
                    resultSerializer.appendTuple(frameTupleAccessor, tIndex);
                    frameOutputStream.appendTuple();
                }
            }
        }

        @Override
        public void fail() throws HyracksDataException {
            failed = true;
            datasetPartitionWriter.fail();
        }

        @Override
        public void close() throws HyracksDataException {
            try {
                if (!failed && frameOutputStream.getTupleCount() > 0) {
                    frameOutputStream.flush(datasetPartitionWriter);
                }
            } catch (Exception e) {
                datasetPartitionWriter.fail();
                throw e;
            } finally {
                datasetPartitionWriter.close();
            }
        }

        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder();
            sb.append("{ ");
            sb.append("\"rsId\": \"").append(rsId).append("\", ");
            sb.append("\"ordered\": ").append(ordered).append(", ");
            sb.append("\"asyncMode\": ").append(asyncMode).append(" }");
            return sb.toString();
        }
    };
}

Example 2 with IResultSerializer

use of org.apache.hyracks.api.dataflow.value.IResultSerializer in project asterixdb by apache.

the class ResultSerializerFactoryProvider method getResultSerializerFactoryProvider.

public IResultSerializerFactory getResultSerializerFactoryProvider() {
    return new IResultSerializerFactory() {

        private static final long serialVersionUID = 1L;

        @Override
        public IResultSerializer createResultSerializer(final RecordDescriptor recordDesc, final PrintStream printStream) {
            return new IResultSerializer() {

                private static final long serialVersionUID = 1L;

                ByteBufferInputStream bbis = new ByteBufferInputStream();

                DataInputStream di = new DataInputStream(bbis);

                @Override
                public void init() throws HyracksDataException {
                }

                @Override
                public boolean appendTuple(IFrameTupleAccessor tAccess, int tIdx) throws HyracksDataException {
                    int start = tAccess.getTupleStartOffset(tIdx) + tAccess.getFieldSlotsLength();
                    bbis.setByteBuffer(tAccess.getBuffer(), start);
                    Object[] record = new Object[recordDesc.getFieldCount()];
                    for (int i = 0; i < record.length; ++i) {
                        Object instance = recordDesc.getFields()[i].deserialize(di);
                        if (i == 0) {
                            printStream.print(String.valueOf(instance));
                        } else {
                            printStream.print(", " + String.valueOf(instance));
                        }
                    }
                    printStream.println();
                    return true;
                }
            };
        }
    };
}