Examples with StreamRecordWriter org.apache.flink.streaming.runtime.io.StreamRecordWriter used on opensource projects

Example 1 with StreamRecordWriter

use of org.apache.flink.streaming.runtime.io.StreamRecordWriter in project flink by apache.

the class OperatorChain method createStreamOutput.

private <T> RecordWriterOutput<T> createStreamOutput(StreamEdge edge, StreamConfig upStreamConfig, int outputIndex, Environment taskEnvironment, String taskName) {
    // OutputTag, return null if not sideOutput
    OutputTag sideOutputTag = edge.getOutputTag();
    TypeSerializer outSerializer = null;
    if (edge.getOutputTag() != null) {
        // side output
        outSerializer = upStreamConfig.getTypeSerializerSideOut(edge.getOutputTag(), taskEnvironment.getUserClassLoader());
    } else {
        // main output
        outSerializer = upStreamConfig.getTypeSerializerOut(taskEnvironment.getUserClassLoader());
    }
    @SuppressWarnings("unchecked") StreamPartitioner<T> outputPartitioner = (StreamPartitioner<T>) edge.getPartitioner();
    LOG.debug("Using partitioner {} for output {} of task ", outputPartitioner, outputIndex, taskName);
    ResultPartitionWriter bufferWriter = taskEnvironment.getWriter(outputIndex);
    // we initialize the partitioner here with the number of key groups (aka max. parallelism)
    if (outputPartitioner instanceof ConfigurableStreamPartitioner) {
        int numKeyGroups = bufferWriter.getNumTargetKeyGroups();
        if (0 < numKeyGroups) {
            ((ConfigurableStreamPartitioner) outputPartitioner).configure(numKeyGroups);
        }
    }
    StreamRecordWriter<SerializationDelegate<StreamRecord<T>>> output = new StreamRecordWriter<>(bufferWriter, outputPartitioner, upStreamConfig.getBufferTimeout());
    output.setMetricGroup(taskEnvironment.getMetricGroup().getIOMetricGroup());
    return new RecordWriterOutput<>(output, outSerializer, sideOutputTag, this);
}