Examples with StreamPropertyListener co.cask.cdap.data.stream.StreamPropertyListener used on opensource projects

Example 1 with StreamPropertyListener

use of co.cask.cdap.data.stream.StreamPropertyListener in project cdap by caskdata.

the class LocalStreamService method createSizeAggregator.

/**
   * Create a new aggregator for the {@code streamId}, and add it to the existing map of {@link Cancellable}
   * {@code aggregators}. This method does not cancel previously existing aggregator associated to the
   * {@code streamId}.
   *
   * @param streamId stream name to create a new aggregator for
   * @param baseCount stream size from which to start aggregating
   * @param threshold notification threshold after which to publish a notification - in MB
   * @return the created {@link StreamSizeAggregator}
   */
private StreamSizeAggregator createSizeAggregator(StreamId streamId, long baseCount, int threshold) {
    // Handle threshold changes
    final Cancellable thresholdSubscription = getStreamCoordinatorClient().addListener(streamId, new StreamPropertyListener() {

        @Override
        public void thresholdChanged(StreamId streamId, int threshold) {
            StreamSizeAggregator aggregator = aggregators.get(streamId);
            while (aggregator == null) {
                Thread.yield();
                aggregator = aggregators.get(streamId);
            }
            aggregator.setStreamThresholdMB(threshold);
        }
    });
    StreamSizeAggregator newAggregator = new StreamSizeAggregator(streamId, baseCount, threshold, thresholdSubscription);
    aggregators.put(streamId, newAggregator);
    return newAggregator;
}

Example 2 with StreamPropertyListener

use of co.cask.cdap.data.stream.StreamPropertyListener in project cdap by caskdata.

the class DistributedStreamService method createSizeAggregator.

/**
   * Create a new aggregator for the {@code streamId}, and add it to the existing map of {@link Cancellable}
   * {@code aggregators}. This method does not cancel previously existing aggregator associated to the
   * {@code streamId}.
   *
   * @param streamId stream Id to create a new aggregator for
   * @param baseCount stream size from which to start aggregating
   * @param threshold notification threshold after which to publish a notification - in MB
   * @return the created {@link StreamSizeAggregator}
   */
private StreamSizeAggregator createSizeAggregator(StreamId streamId, long baseCount, int threshold) {
    LOG.debug("Creating size aggregator for stream {} with baseCount {} and threshold {}", streamId, baseCount, threshold);
    // Handle threshold changes
    final Cancellable thresholdSubscription = getStreamCoordinatorClient().addListener(streamId, new StreamPropertyListener() {

        @Override
        public void thresholdChanged(StreamId streamId, int threshold) {
            StreamSizeAggregator aggregator = aggregators.get(streamId);
            while (aggregator == null) {
                Thread.yield();
                aggregator = aggregators.get(streamId);
            }
            aggregator.setStreamThresholdMB(threshold);
        }
    });
    StreamSizeAggregator newAggregator = new StreamSizeAggregator(streamId, baseCount, threshold, thresholdSubscription);
    newAggregator.init();
    aggregators.put(streamId, newAggregator);
    return newAggregator;
}