| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.ratis.metrics; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.EnumMap; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.function.Function; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class RatisMetrics { |
| static final Logger LOG = LoggerFactory.getLogger(RatisMetrics.class); |
| public static final String RATIS_APPLICATION_NAME_METRICS = "ratis"; |
| |
| public static String getHeartbeatSuffix(boolean heartbeat) { |
| return heartbeat ? "_heartbeat" : ""; |
| } |
| |
| private static <T> Function<Boolean, T> newHeartbeatFunction(String prefix, Function<String, T> function) { |
| final T trueValue = function.apply(prefix + getHeartbeatSuffix(true)); |
| final T falseValue = function.apply(prefix + getHeartbeatSuffix(false)); |
| return b -> b? trueValue: falseValue; |
| } |
| |
| protected static <T extends Enum<T>> Map<T, Map<String, LongCounter>> newCounterMaps(Class<T> clazz) { |
| final EnumMap<T,Map<String, LongCounter>> maps = new EnumMap<>(clazz); |
| Arrays.stream(clazz.getEnumConstants()).forEach(t -> maps.put(t, new ConcurrentHashMap<>())); |
| return Collections.unmodifiableMap(maps); |
| } |
| |
| protected static <T extends Enum<T>> Map<T, LongCounter> newCounterMap( |
| Class<T> clazz, Function<T, LongCounter> constructor) { |
| final EnumMap<T, LongCounter> map = new EnumMap<>(clazz); |
| Arrays.stream(clazz.getEnumConstants()).forEach(t -> map.put(t, constructor.apply(t))); |
| return Collections.unmodifiableMap(map); |
| } |
| |
| protected static <T extends Enum<T>> Map<T, Timekeeper> newTimerMap( |
| Class<T> clazz, Function<T, Timekeeper> constructor) { |
| final EnumMap<T, Timekeeper> map = new EnumMap<>(clazz); |
| Arrays.stream(clazz.getEnumConstants()).forEach(t -> map.put(t, constructor.apply(t))); |
| return Collections.unmodifiableMap(map); |
| } |
| |
| protected static RatisMetricRegistry create(MetricRegistryInfo info) { |
| Optional<RatisMetricRegistry> metricRegistry = MetricRegistries.global().get(info); |
| return metricRegistry.orElseGet(() -> { |
| LOG.debug("Creating {}", info); |
| return MetricRegistries.global().create(info); |
| }); |
| } |
| |
| private final RatisMetricRegistry registry; |
| |
| protected RatisMetrics(RatisMetricRegistry registry) { |
| this.registry = registry; |
| } |
| |
| public void unregister() { |
| MetricRegistryInfo info = registry.getMetricRegistryInfo(); |
| LOG.debug("Unregistering {}", info); |
| Optional<RatisMetricRegistry> metricRegistry = MetricRegistries.global().get(info); |
| if (metricRegistry.isPresent()) { |
| MetricRegistries.global().remove(info); |
| } |
| } |
| |
| public final RatisMetricRegistry getRegistry() { |
| return registry; |
| } |
| |
| protected Function<Boolean, Timekeeper> newHeartbeatTimer(String prefix) { |
| return newHeartbeatFunction(prefix, getRegistry()::timer); |
| } |
| |
| protected Function<Boolean, LongCounter> newHeartbeatCounter(String prefix) { |
| return newHeartbeatFunction(prefix, getRegistry()::counter); |
| } |
| } |