@Override
protected void publish(Iterator<MetricValues> metrics) throws Exception {
while (metrics.hasNext()) {
MetricValues metric = metrics.next();
metricStore.add(metric);
}
}
@Override
public void onReceived(Iterator<FetchedMessage> messages) {
// Decode the metrics records.
final ByteBufferInputStream is = new ByteBufferInputStream(null);
List<MetricValues> records = Lists.newArrayList();
while (messages.hasNext()) {
FetchedMessage input = messages.next();
try {
MetricValues metricValues =
recordReader.read(new BinaryDecoder(is.reset(input.getPayload())), recordSchema);
records.add(metricValues);
} catch (IOException e) {
LOG.info("Failed to decode message to MetricValue. Skipped. {}", e.getMessage());
}
}
if (records.isEmpty()) {
LOG.info("No records to process.");
return;
}
try {
addProcessingStats(records);
metricStore.add(records);
} catch (Exception e) {
String msg = "Failed to add metrics data to a store";
LOG.error(msg);
// todo: will it shut down the whole the metrics processor service??
throw new RuntimeException(msg, e);
}
recordProcessed += records.size();
if (recordProcessed % 1000 == 0) {
LOG.info("{} metrics records processed", recordProcessed);
LOG.info("Last record time: {}", records.get(records.size() - 1).getTimestamp());
}
}