org.apache.spark.InterruptibleIterator Java Examples

The following examples show how to use org.apache.spark.InterruptibleIterator. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: SourceRDD.java    From beam with Apache License 2.0 5 votes vote down vote up 
@Override
public scala.collection.Iterator<WindowedValue<T>> compute(
    final Partition split, final TaskContext context) {
  final MetricsContainer metricsContainer = metricsAccum.value().getContainer(stepName);

  @SuppressWarnings("unchecked")
  final BoundedSource.BoundedReader<T> reader = createReader((SourcePartition<T>) split);

  final Iterator<WindowedValue<T>> readerIterator =
      new ReaderToIteratorAdapter<>(metricsContainer, reader);

  return new InterruptibleIterator<>(context, JavaConversions.asScalaIterator(readerIterator));
}
Example #2
Source File: DeepRDD.java    From deep-spark with Apache License 2.0 5 votes vote down vote up 
@Override
public Iterator<T> compute(Partition split, TaskContext context) {

    initExtractorClient();

    extractorClient.initIterator(split, config.getValue());

    context.addTaskCompletionListener(new AbstractFunction1<TaskContext, BoxedUnit>() {

        @Override
        public BoxedUnit apply(TaskContext v1) {
            extractorClient.close();
            return null;
        }
    });

    java.util.Iterator<T> iterator = new java.util.Iterator<T>() {

        @Override
        public boolean hasNext() {
            return extractorClient.hasNext();
        }

        @Override
        public T next() {
            return extractorClient.next();
        }

        @Override
        public void remove() {
            throw new DeepIOException(
                    "Method not implemented (and won't be implemented anytime soon!!!)");
        }
    };

    return new InterruptibleIterator<>(context, asScalaIterator(iterator));

}
Example #3
Source File: IteratorUtils.java    From spliceengine with GNU Affero General Public License v3.0 5 votes vote down vote up 
public static <E> Iterator<E> asInterruptibleIterator(Iterator<E> it) {
    TaskContext context = TaskContext.get();
    if (context != null) {
        return (Iterator<E>) JavaConverters.asJavaIteratorConverter(new InterruptibleIterator(context, JavaConverters.asScalaIteratorConverter(it).asScala())).asJava();
    } else
        return it;
}