| /** |
| * 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.ipc.metrics; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.ipc.RetryCache; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| 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; |
| |
| /** |
| * This class is for maintaining the various RetryCache-related statistics |
| * and publishing them through the metrics interfaces. |
| */ |
| @InterfaceAudience.Private |
| @Metrics(about="Aggregate RetryCache metrics", context="rpc") |
| public class RetryCacheMetrics { |
| |
| static final Log LOG = LogFactory.getLog(RetryCacheMetrics.class); |
| final MetricsRegistry registry; |
| final String name; |
| |
| RetryCacheMetrics(RetryCache retryCache) { |
| name = "RetryCache."+ retryCache.getCacheName(); |
| registry = new MetricsRegistry(name); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Initialized "+ registry); |
| } |
| } |
| |
| public String getName() { return name; } |
| |
| public static RetryCacheMetrics create(RetryCache cache) { |
| RetryCacheMetrics m = new RetryCacheMetrics(cache); |
| return DefaultMetricsSystem.instance().register(m.name, null, m); |
| } |
| |
| @Metric("Number of RetryCache hit") MutableCounterLong cacheHit; |
| @Metric("Number of RetryCache cleared") MutableCounterLong cacheCleared; |
| @Metric("Number of RetryCache updated") MutableCounterLong cacheUpdated; |
| |
| /** |
| * One cache hit event |
| */ |
| public void incrCacheHit() { |
| cacheHit.incr(); |
| } |
| |
| /** |
| * One cache cleared |
| */ |
| public void incrCacheCleared() { |
| cacheCleared.incr(); |
| } |
| |
| /** |
| * One cache updated |
| */ |
| public void incrCacheUpdated() { |
| cacheUpdated.incr(); |
| } |
| |
| public long getCacheHit() { |
| return cacheHit.value(); |
| } |
| |
| public long getCacheCleared() { |
| return cacheCleared.value(); |
| } |
| |
| public long getCacheUpdated() { |
| return cacheUpdated.value(); |
| } |
| |
| } |