| /** |
| * 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.yarn.server.sharedcachemanager.metrics; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.metrics2.MetricsSystem; |
| import org.apache.hadoop.metrics2.annotation.Metric; |
| import org.apache.hadoop.metrics2.annotation.Metrics; |
| import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem; |
| import org.apache.hadoop.metrics2.lib.MetricsRegistry; |
| import org.apache.hadoop.metrics2.lib.MutableCounterLong; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class is for maintaining client requests metrics |
| * and publishing them through the metrics interfaces. |
| */ |
| @Private |
| @Unstable |
| @Metrics(about="Client SCM metrics", context="yarn") |
| public class ClientSCMMetrics { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ClientSCMMetrics.class); |
| final MetricsRegistry registry; |
| private final static ClientSCMMetrics INSTANCE = create(); |
| |
| private ClientSCMMetrics() { |
| registry = new MetricsRegistry("clientRequests"); |
| LOG.debug("Initialized " + registry); |
| } |
| |
| public static ClientSCMMetrics getInstance() { |
| return INSTANCE; |
| } |
| |
| static ClientSCMMetrics create() { |
| MetricsSystem ms = DefaultMetricsSystem.instance(); |
| |
| ClientSCMMetrics metrics = new ClientSCMMetrics(); |
| ms.register("clientRequests", null, metrics); |
| return metrics; |
| } |
| |
| @Metric("Number of cache hits") MutableCounterLong cacheHits; |
| @Metric("Number of cache misses") MutableCounterLong cacheMisses; |
| @Metric("Number of cache releases") MutableCounterLong cacheReleases; |
| |
| /** |
| * One cache hit event |
| */ |
| public void incCacheHitCount() { |
| cacheHits.incr(); |
| } |
| |
| /** |
| * One cache miss event |
| */ |
| public void incCacheMissCount() { |
| cacheMisses.incr(); |
| } |
| |
| /** |
| * One cache release event |
| */ |
| public void incCacheRelease() { |
| cacheReleases.incr(); |
| } |
| |
| public long getCacheHits() { return cacheHits.value(); } |
| public long getCacheMisses() { return cacheMisses.value(); } |
| public long getCacheReleases() { return cacheReleases.value(); } |
| |
| } |