| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.samza.system.kinesis.metrics; |
| |
| import java.time.Duration; |
| import java.time.Instant; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| |
| import org.apache.samza.metrics.Counter; |
| import org.apache.samza.metrics.MetricsRegistry; |
| |
| import com.amazonaws.services.kinesis.model.Record; |
| |
| |
| /** |
| * KinesisSystemConsumerMetrics class has per-stream metrics and aggregate metrics across kinesis consumers |
| */ |
| |
| public class KinesisSystemConsumerMetrics { |
| |
| private final MetricsRegistry registry; |
| |
| // Aggregate metrics across all kinesis system consumers |
| private static Counter aggEventReadRate = null; |
| private static Counter aggEventByteReadRate = null; |
| private static SamzaHistogram aggReadLatency = null; |
| private static SamzaHistogram aggMillisBehindLatest = null; |
| |
| // Per-stream metrics |
| private Map<String, Counter> eventReadRates; |
| private Map<String, Counter> eventByteReadRates; |
| private Map<String, SamzaHistogram> readLatencies; |
| private Map<String, SamzaHistogram> millisBehindLatest; |
| |
| private static final Object LOCK = new Object(); |
| |
| private static final String AGGREGATE = "aggregate"; |
| private static final String EVENT_READ_RATE = "eventReadRate"; |
| private static final String EVENT_BYTE_READ_RATE = "eventByteReadRate"; |
| private static final String READ_LATENCY = "readLatency"; |
| private static final String MILLIS_BEHIND_LATEST = "millisBehindLatest"; |
| |
| public KinesisSystemConsumerMetrics(MetricsRegistry registry) { |
| this.registry = registry; |
| } |
| |
| public void initializeMetrics(Set<String> streamNames) { |
| eventReadRates = streamNames.stream() |
| .collect(Collectors.toConcurrentMap(Function.identity(), x -> registry.newCounter(x, EVENT_READ_RATE))); |
| eventByteReadRates = streamNames.stream() |
| .collect(Collectors.toConcurrentMap(Function.identity(), x -> registry.newCounter(x, EVENT_BYTE_READ_RATE))); |
| readLatencies = streamNames.stream() |
| .collect(Collectors.toConcurrentMap(Function.identity(), x -> new SamzaHistogram(registry, x, READ_LATENCY))); |
| millisBehindLatest = streamNames.stream() |
| .collect(Collectors.toConcurrentMap(Function.identity(), |
| x -> new SamzaHistogram(registry, x, MILLIS_BEHIND_LATEST))); |
| |
| // Locking to ensure that these aggregated metrics will be created only once across multiple system consumers. |
| synchronized (LOCK) { |
| if (aggEventReadRate == null) { |
| aggEventReadRate = registry.newCounter(AGGREGATE, EVENT_READ_RATE); |
| aggEventByteReadRate = registry.newCounter(AGGREGATE, EVENT_BYTE_READ_RATE); |
| aggReadLatency = new SamzaHistogram(registry, AGGREGATE, READ_LATENCY); |
| aggMillisBehindLatest = new SamzaHistogram(registry, AGGREGATE, MILLIS_BEHIND_LATEST); |
| } |
| } |
| } |
| |
| public void updateMillisBehindLatest(String stream, Long millisBehindLatest) { |
| this.millisBehindLatest.get(stream).update(millisBehindLatest); |
| aggMillisBehindLatest.update(millisBehindLatest); |
| } |
| |
| public void updateMetrics(String stream, Record record) { |
| eventReadRates.get(stream).inc(); |
| aggEventReadRate.inc(); |
| |
| long recordSize = record.getData().array().length + record.getPartitionKey().length(); |
| eventByteReadRates.get(stream).inc(recordSize); |
| aggEventByteReadRate.inc(recordSize); |
| |
| long latencyMs = Duration.between(Instant.now(), record.getApproximateArrivalTimestamp().toInstant()).toMillis(); |
| readLatencies.get(stream).update(latencyMs); |
| aggReadLatency.update(latencyMs); |
| } |
| } |