spring-kafka KafkaStreamsMicrometerListener 源码
spring-kafka KafkaStreamsMicrometerListener 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/streams/KafkaStreamsMicrometerListener.java
/*
* Copyright 2020-2022 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.kafka.streams;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.kafka.streams.KafkaStreams;
import org.springframework.kafka.config.StreamsBuilderFactoryBean;
import io.micrometer.core.instrument.ImmutableTag;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.binder.kafka.KafkaStreamsMetrics;
/**
* Creates a {@link KafkaStreamsMetrics} for the {@link KafkaStreams}.
*
* @author Gary Russell
* @since 2.5.3
*
*/
public class KafkaStreamsMicrometerListener implements StreamsBuilderFactoryBean.Listener {
private final MeterRegistry meterRegistry;
private final List<Tag> tags;
private final Map<String, KafkaStreamsMetrics> metrics = new HashMap<>();
/**
* Construct an instance with the provided registry.
* @param meterRegistry the registry.
*/
public KafkaStreamsMicrometerListener(MeterRegistry meterRegistry) {
this(meterRegistry, Collections.emptyList());
}
/**
* Construct an instance with the provided registry and tags.
* @param meterRegistry the registry.
* @param tags the tags.
*/
public KafkaStreamsMicrometerListener(MeterRegistry meterRegistry, List<Tag> tags) {
this.meterRegistry = meterRegistry;
this.tags = tags;
}
@Override
public synchronized void streamsAdded(String id, KafkaStreams kafkaStreams) {
if (!this.metrics.containsKey(id)) {
List<Tag> streamsTags = new ArrayList<>(this.tags);
streamsTags.add(new ImmutableTag("spring.id", id));
this.metrics.put(id, new KafkaStreamsMetrics(kafkaStreams, streamsTags));
this.metrics.get(id).bindTo(this.meterRegistry);
}
}
@Override
public synchronized void streamsRemoved(String id, KafkaStreams streams) {
KafkaStreamsMetrics removed = this.metrics.remove(id);
if (removed != null) {
removed.close();
}
}
}
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