| /* |
| * 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.hadoop.hdds.utils; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.hadoop.metrics2.MetricsCollector; |
| import org.apache.hadoop.metrics2.MetricsInfo; |
| import org.apache.hadoop.metrics2.MetricsRecordBuilder; |
| import org.apache.hadoop.metrics2.MetricsSource; |
| import org.apache.hadoop.metrics2.MetricsTag; |
| import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem; |
| import org.apache.hadoop.metrics2.lib.Interns; |
| |
| /** |
| * Metrics to count all the subtypes of a specific message. |
| */ |
| public class ProtocolMessageMetrics<KEY> implements MetricsSource { |
| |
| private String name; |
| |
| private String description; |
| |
| private Map<KEY, AtomicLong> counters = |
| new ConcurrentHashMap<>(); |
| |
| private Map<KEY, AtomicLong> elapsedTimes = |
| new ConcurrentHashMap<>(); |
| |
| public static <KEY> ProtocolMessageMetrics<KEY> create(String name, |
| String description, KEY[] types) { |
| return new ProtocolMessageMetrics<KEY>(name, description, types); |
| } |
| |
| public ProtocolMessageMetrics(String name, String description, |
| KEY[] values) { |
| this.name = name; |
| this.description = description; |
| for (KEY value : values) { |
| counters.put(value, new AtomicLong(0)); |
| elapsedTimes.put(value, new AtomicLong(0)); |
| } |
| } |
| |
| public void increment(KEY key, long duration) { |
| counters.get(key).incrementAndGet(); |
| elapsedTimes.get(key).addAndGet(duration); |
| } |
| |
| public void register() { |
| DefaultMetricsSystem.instance() |
| .register(name, description, this); |
| } |
| |
| public void unregister() { |
| DefaultMetricsSystem.instance().unregisterSource(name); |
| } |
| |
| @Override |
| public void getMetrics(MetricsCollector collector, boolean all) { |
| counters.forEach((key, value) -> { |
| MetricsRecordBuilder builder = |
| collector.addRecord(name); |
| builder.add( |
| new MetricsTag(Interns.info("type", "Message type"), key.toString())); |
| builder.addCounter(new MetricName("counter", "Number of distinct calls"), |
| value.longValue()); |
| builder.addCounter( |
| new MetricName("time", "Sum of the duration of the calls"), |
| elapsedTimes.get(key).longValue()); |
| builder.endRecord(); |
| |
| }); |
| } |
| |
| /** |
| * Simple metrics info implementation. |
| */ |
| public static class MetricName implements MetricsInfo { |
| private String name; |
| private String description; |
| |
| public MetricName(String name, String description) { |
| this.name = name; |
| this.description = description; |
| } |
| |
| @Override |
| public String name() { |
| return name; |
| } |
| |
| @Override |
| public String description() { |
| return description; |
| } |
| } |
| } |