001/* 002 * (C) Copyright 2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Kevin Leturc 018 */ 019package org.nuxeo.ecm.core.storage.dbs; 020 021import org.nuxeo.runtime.metrics.NuxeoMetricSet; 022 023import com.codahale.metrics.MetricSet; 024import com.google.common.cache.Cache; 025 026/** 027 * Wrapper used to wrap the Guava cache's statistics into Gauges in order to report them via Codahale Metrics. 028 * 029 * @since 8.10 030 */ 031public class GuavaCacheMetric extends NuxeoMetricSet { 032 033 private GuavaCacheMetric(String name, String... names) { 034 super(name, names); 035 } 036 037 public static MetricSet of(Cache cache, String name, String... names) { 038 GuavaCacheMetric metrics = new GuavaCacheMetric(name, names); 039 metrics.putGauge(() -> cache.size(), "size"); 040 metrics.putGauge(() -> cache.stats().averageLoadPenalty(), "average", "load", "penalty"); 041 metrics.putGauge(() -> cache.stats().evictionCount(), "eviction", "count"); 042 metrics.putGauge(() -> cache.stats().hitCount(), "hit", "count"); 043 metrics.putGauge(() -> cache.stats().hitRate(), "hit", "rate"); 044 metrics.putGauge(() -> cache.stats().loadCount(), "load", "count"); 045 metrics.putGauge(() -> cache.stats().loadExceptionCount(), "load", "exception", "count"); 046 metrics.putGauge(() -> cache.stats().loadExceptionRate(), "load", "exception", "rate"); 047 metrics.putGauge(() -> cache.stats().loadSuccessCount(), "load", "success", "count"); 048 metrics.putGauge(() -> cache.stats().missCount(), "miss", "count"); 049 metrics.putGauge(() -> cache.stats().missRate(), "miss", "rate"); 050 metrics.putGauge(() -> cache.stats().requestCount(), "request", "count"); 051 metrics.putGauge(() -> cache.stats().totalLoadTime(), "total", "load", "time"); 052 return metrics; 053 } 054 055}