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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.MetricName;
import com.yammer.metrics.core.MetricsRegistry;
import org.apache.kafka.server.metrics.KafkaYammerMetrics;
import java.util.Arrays;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicInteger;
/**
* These are the metrics which are managed by the ControllerServer class. They generally pertain to
* aspects of the metadata, like how many topics or partitions we have.
* All of these except MetadataErrorCount are managed by ControllerMetadataMetricsPublisher.
*
* IMPORTANT: Metrics which are managed by the QuorumController class itself should go in
* @link{org.apache.kafka.controller.metrics.QuorumControllerMetrics}, not here.
*/
public final class ControllerMetadataMetrics implements AutoCloseable {
private final static MetricName FENCED_BROKER_COUNT = getMetricName(
"KafkaController", "FencedBrokerCount");
private final static MetricName ACTIVE_BROKER_COUNT = getMetricName(
"KafkaController", "ActiveBrokerCount");
private final static MetricName GLOBAL_TOPIC_COUNT = getMetricName(
"KafkaController", "GlobalTopicCount");
private final static MetricName GLOBAL_PARTITION_COUNT = getMetricName(
"KafkaController", "GlobalPartitionCount");
private final static MetricName OFFLINE_PARTITION_COUNT = getMetricName(
"KafkaController", "OfflinePartitionsCount");
private final static MetricName PREFERRED_REPLICA_IMBALANCE_COUNT = getMetricName(
"KafkaController", "PreferredReplicaImbalanceCount");
private final static MetricName METADATA_ERROR_COUNT = getMetricName(
"KafkaController", "MetadataErrorCount");
private final static MetricName ZK_MIGRATION_STATE = getMetricName(
"KafkaController", "ZkMigrationState");
private final Optional registry;
private final AtomicInteger fencedBrokerCount = new AtomicInteger(0);
private final AtomicInteger activeBrokerCount = new AtomicInteger(0);
private final AtomicInteger globalTopicCount = new AtomicInteger(0);
private final AtomicInteger globalPartitionCount = new AtomicInteger(0);
private final AtomicInteger offlinePartitionCount = new AtomicInteger(0);
private final AtomicInteger preferredReplicaImbalanceCount = new AtomicInteger(0);
private final AtomicInteger metadataErrorCount = new AtomicInteger(0);
private final AtomicInteger zkMigrationState = new AtomicInteger(-1);
/**
* Create a new ControllerMetadataMetrics object.
*
* @param registry The metrics registry, or Optional.empty if this is a test and we don't have one.
*/
public ControllerMetadataMetrics(Optional registry) {
this.registry = registry;
registry.ifPresent(r -> r.newGauge(FENCED_BROKER_COUNT, new Gauge() {
@Override
public Integer value() {
return fencedBrokerCount();
}
}));
registry.ifPresent(r -> r.newGauge(ACTIVE_BROKER_COUNT, new Gauge() {
@Override
public Integer value() {
return activeBrokerCount();
}
}));
registry.ifPresent(r -> r.newGauge(GLOBAL_TOPIC_COUNT, new Gauge() {
@Override
public Integer value() {
return globalTopicCount();
}
}));
registry.ifPresent(r -> r.newGauge(GLOBAL_PARTITION_COUNT, new Gauge() {
@Override
public Integer value() {
return globalPartitionCount();
}
}));
registry.ifPresent(r -> r.newGauge(OFFLINE_PARTITION_COUNT, new Gauge() {
@Override
public Integer value() {
return offlinePartitionCount();
}
}));
registry.ifPresent(r -> r.newGauge(PREFERRED_REPLICA_IMBALANCE_COUNT, new Gauge() {
@Override
public Integer value() {
return preferredReplicaImbalanceCount();
}
}));
registry.ifPresent(r -> r.newGauge(METADATA_ERROR_COUNT, new Gauge() {
@Override
public Integer value() {
return metadataErrorCount();
}
}));
registry.ifPresent(r -> r.newGauge(ZK_MIGRATION_STATE, new Gauge() {
@Override
public Integer value() {
return (int) zkMigrationState();
}
}));
}
public void setFencedBrokerCount(int brokerCount) {
this.fencedBrokerCount.set(brokerCount);
}
public void addToFencedBrokerCount(int brokerCountDelta) {
this.fencedBrokerCount.addAndGet(brokerCountDelta);
}
public int fencedBrokerCount() {
return this.fencedBrokerCount.get();
}
public void setActiveBrokerCount(int brokerCount) {
this.activeBrokerCount.set(brokerCount);
}
public void addToActiveBrokerCount(int brokerCountDelta) {
this.activeBrokerCount.addAndGet(brokerCountDelta);
}
public int activeBrokerCount() {
return this.activeBrokerCount.get();
}
public void setGlobalTopicCount(int topicCount) {
this.globalTopicCount.set(topicCount);
}
public void addToGlobalTopicCount(int topicCountDelta) {
this.globalTopicCount.addAndGet(topicCountDelta);
}
public int globalTopicCount() {
return this.globalTopicCount.get();
}
public void setGlobalPartitionCount(int partitionCount) {
this.globalPartitionCount.set(partitionCount);
}
public void addToGlobalPartitionCount(int partitionCountDelta) {
this.globalPartitionCount.addAndGet(partitionCountDelta);
}
public int globalPartitionCount() {
return this.globalPartitionCount.get();
}
public void setOfflinePartitionCount(int offlinePartitions) {
this.offlinePartitionCount.set(offlinePartitions);
}
public void addToOfflinePartitionCount(int offlinePartitionsDelta) {
this.offlinePartitionCount.addAndGet(offlinePartitionsDelta);
}
public int offlinePartitionCount() {
return this.offlinePartitionCount.get();
}
public void setPreferredReplicaImbalanceCount(int replicaImbalances) {
this.preferredReplicaImbalanceCount.set(replicaImbalances);
}
public void addToPreferredReplicaImbalanceCount(int replicaImbalancesCount) {
this.preferredReplicaImbalanceCount.addAndGet(replicaImbalancesCount);
}
public int preferredReplicaImbalanceCount() {
return this.preferredReplicaImbalanceCount.get();
}
public void incrementMetadataErrorCount() {
this.metadataErrorCount.getAndIncrement();
}
public int metadataErrorCount() {
return this.metadataErrorCount.get();
}
public void setZkMigrationState(byte migrationStateValue) {
this.zkMigrationState.set(migrationStateValue);
}
public byte zkMigrationState() {
return zkMigrationState.byteValue();
}
@Override
public void close() {
registry.ifPresent(r -> Arrays.asList(
FENCED_BROKER_COUNT,
ACTIVE_BROKER_COUNT,
GLOBAL_TOPIC_COUNT,
GLOBAL_PARTITION_COUNT,
OFFLINE_PARTITION_COUNT,
PREFERRED_REPLICA_IMBALANCE_COUNT,
METADATA_ERROR_COUNT,
ZK_MIGRATION_STATE
).forEach(r::removeMetric));
}
private static MetricName getMetricName(String type, String name) {
return KafkaYammerMetrics.getMetricName("kafka.controller", type, name);
}
}
