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/*
* 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.kafka.controller.metrics;
import com.yammer.metrics.core.Gauge;
import com.yammer.metrics.core.Histogram;
import com.yammer.metrics.core.MetricName;
import com.yammer.metrics.core.MetricsRegistry;
import org.apache.kafka.common.utils.Time;
import org.apache.kafka.server.metrics.KafkaYammerMetrics;
import java.util.Arrays;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Consumer;
/**
* These are the metrics which are managed by the QuorumController class. They generally pertain to
* aspects of the internal operation of the controller, such as the time events spend on the
* controller queue.
*
* IMPORTANT: Metrics which relate to the metadata itself (like number of topics, etc.) should go in
* @link{org.apache.kafka.controller.metrics.ControllerMetadataMetrics}, not here.
*/
public class QuorumControllerMetrics implements AutoCloseable {
private final static MetricName ACTIVE_CONTROLLER_COUNT = getMetricName(
"KafkaController", "ActiveControllerCount");
private final static MetricName EVENT_QUEUE_TIME_MS = getMetricName(
"ControllerEventManager", "EventQueueTimeMs");
private final static MetricName EVENT_QUEUE_PROCESSING_TIME_MS = getMetricName(
"ControllerEventManager", "EventQueueProcessingTimeMs");
private final static MetricName LAST_APPLIED_RECORD_OFFSET = getMetricName(
"KafkaController", "LastAppliedRecordOffset");
private final static MetricName LAST_COMMITTED_RECORD_OFFSET = getMetricName(
"KafkaController", "LastCommittedRecordOffset");
private final static MetricName LAST_APPLIED_RECORD_TIMESTAMP = getMetricName(
"KafkaController", "LastAppliedRecordTimestamp");
private final static MetricName LAST_APPLIED_RECORD_LAG_MS = getMetricName(
"KafkaController", "LastAppliedRecordLagMs");
private final Optional registry;
private volatile boolean active;
private final AtomicLong lastAppliedRecordOffset = new AtomicLong(0);
private final AtomicLong lastCommittedRecordOffset = new AtomicLong(0);
private final AtomicLong lastAppliedRecordTimestamp = new AtomicLong(0);
private final Consumer eventQueueTimeUpdater;
private final Consumer eventQueueProcessingTimeUpdater;
private final AtomicLong timedOutHeartbeats = new AtomicLong(0);
private Consumer newHistogram(MetricName name, boolean biased) {
if (registry.isPresent()) {
Histogram histogram = registry.get().newHistogram(name, biased);
return e -> histogram.update(e);
} else {
return __ -> { };
}
}
public QuorumControllerMetrics(
Optional registry,
Time time
) {
this.registry = registry;
this.active = false;
registry.ifPresent(r -> r.newGauge(ACTIVE_CONTROLLER_COUNT, new Gauge() {
@Override
public Integer value() {
return active ? 1 : 0;
}
}));
this.eventQueueTimeUpdater = newHistogram(EVENT_QUEUE_TIME_MS, true);
this.eventQueueProcessingTimeUpdater = newHistogram(EVENT_QUEUE_PROCESSING_TIME_MS, true);
registry.ifPresent(r -> r.newGauge(LAST_APPLIED_RECORD_OFFSET, new Gauge() {
@Override
public Long value() {
return lastAppliedRecordOffset();
}
}));
registry.ifPresent(r -> r.newGauge(LAST_COMMITTED_RECORD_OFFSET, new Gauge() {
@Override
public Long value() {
return lastCommittedRecordOffset();
}
}));
registry.ifPresent(r -> r.newGauge(LAST_APPLIED_RECORD_TIMESTAMP, new Gauge() {
@Override
public Long value() {
return lastAppliedRecordTimestamp();
}
}));
registry.ifPresent(r -> r.newGauge(LAST_APPLIED_RECORD_LAG_MS, new Gauge() {
@Override
public Long value() {
return time.milliseconds() - lastAppliedRecordTimestamp();
}
}));
}
public void setActive(boolean active) {
this.active = active;
}
public boolean active() {
return this.active;
}
public void updateEventQueueTime(long durationMs) {
eventQueueTimeUpdater.accept(durationMs);
}
public void updateEventQueueProcessingTime(long durationMs) {
eventQueueProcessingTimeUpdater.accept(durationMs);
}
public void setLastAppliedRecordOffset(long offset) {
lastAppliedRecordOffset.set(offset);
}
public long lastAppliedRecordOffset() {
return lastAppliedRecordOffset.get();
}
public void setLastCommittedRecordOffset(long offset) {
lastCommittedRecordOffset.set(offset);
}
public long lastCommittedRecordOffset() {
return lastCommittedRecordOffset.get();
}
public void setLastAppliedRecordTimestamp(long timestamp) {
lastAppliedRecordTimestamp.set(timestamp);
}
public long lastAppliedRecordTimestamp() {
return lastAppliedRecordTimestamp.get();
}
public void incrementTimedOutHeartbeats() {
timedOutHeartbeats.addAndGet(1);
}
public void setTimedOutHeartbeats(long heartbeats) {
timedOutHeartbeats.set(heartbeats);
}
public long timedOutHeartbeats() {
return timedOutHeartbeats.get();
}
@Override
public void close() {
registry.ifPresent(r -> Arrays.asList(
ACTIVE_CONTROLLER_COUNT,
EVENT_QUEUE_TIME_MS,
EVENT_QUEUE_PROCESSING_TIME_MS,
LAST_APPLIED_RECORD_OFFSET,
LAST_COMMITTED_RECORD_OFFSET,
LAST_APPLIED_RECORD_TIMESTAMP,
LAST_APPLIED_RECORD_LAG_MS
).forEach(r::removeMetric));
}
private static MetricName getMetricName(String type, String name) {
return KafkaYammerMetrics.getMetricName("kafka.controller", type, name);
}
}
