agresch commented on a change in pull request #3404:
URL: https://github.com/apache/storm/pull/3404#discussion_r684334280
##########
File path:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
##########
@@ -53,7 +53,7 @@
import org.apache.storm.kafka.spout.internal.ConsumerFactoryDefault;
import org.apache.storm.kafka.spout.internal.OffsetManager;
import org.apache.storm.kafka.spout.internal.Timer;
-import org.apache.storm.kafka.spout.metrics.KafkaOffsetMetric;
Review comment:
can KafkaOffsetMetric.java be deleted?
##########
File path:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/metrics2/KafkaOffsetMetricManager.java
##########
@@ -0,0 +1,85 @@
+/**
+ * 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.storm.kafka.spout.metrics2;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Supplier;
+
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.common.TopicPartition;
+import org.apache.storm.kafka.spout.internal.OffsetManager;
+import org.apache.storm.task.TopologyContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class is used to manage both the partition and topic level offset
metrics.
+ */
+public class KafkaOffsetMetricManager<K, V> {
+ private static final Logger LOG =
LoggerFactory.getLogger(KafkaOffsetMetricManager.class);
+ private final Supplier<Map<TopicPartition, OffsetManager>>
offsetManagerSupplier;
+ private final Supplier<Consumer<K, V>> consumerSupplier;
+ private TopologyContext topologyContext;
+
+ private Map<String, KafkaOffsetTopicMetrics> topicMetricsMap;
+ private Map<TopicPartition, KafkaOffsetPartitionMetrics>
topicPartitionMetricsMap;
+
+ public KafkaOffsetMetricManager(Supplier<Map<TopicPartition,
OffsetManager>> offsetManagerSupplier,
+ Supplier<Consumer<K, V>> consumerSupplier,
+ TopologyContext topologyContext) {
+ this.offsetManagerSupplier = offsetManagerSupplier;
+ this.consumerSupplier = consumerSupplier;
+ this.topologyContext = topologyContext;
+
+ this.topicMetricsMap = new HashMap<>();
+ this.topicPartitionMetricsMap = new HashMap<>();
+ LOG.info("Running KafkaOffsetMetricManager");
+ }
+
+ public void registerMetricsForNewTopicPartitions(Set<TopicPartition>
newAssignment) {
+ for (TopicPartition topicPartition : newAssignment) {
+ if (!topicPartitionMetricsMap.containsKey(topicPartition)) {
+ LOG.info("Registering metric for topicPartition: {}",
topicPartition);
+ // create topic level metrics for given topic if absent
+ String topic = topicPartition.topic();
+ KafkaOffsetTopicMetrics topicMetrics =
topicMetricsMap.get(topic);
+ if (topicMetrics == null) {
+ topicMetrics = new KafkaOffsetTopicMetrics(topic);
+ topicMetricsMap.put(topic, topicMetrics);
+ }
+ topologyContext.registerMetricSet("kafkaOffset", topicMetrics);
Review comment:
shouldn't this register the kafkaOffset set only if creating a new
KafkaOffsetTopicMetrics()? Do we also need to create/register
topicPartitionMetricSet if topicMetrics already exists?
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