001/** 002 * Copyright 2015 DuraSpace, Inc. 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 */ 016package org.fcrepo.metrics; 017 018import static com.codahale.metrics.SharedMetricRegistries.getOrCreate; 019 020import com.codahale.metrics.MetricRegistry; 021 022/** 023 * Provide helpers for working with the Metrics registry 024 * 025 * @author cbeer 026 * @since Mar 22, 2013 027 */ 028public class RegistryService { 029 030 private static final MetricRegistry METRICS = getOrCreate("fcrepo-metrics"); 031 032 private static volatile RegistryService instance = null; 033 034 private RegistryService() { 035 // New instances should come from the singleton 036 } 037 038 /** 039 * Create the instance 040 */ 041 public synchronized static RegistryService getInstance() { 042 RegistryService local = instance; 043 if (null == local) { 044 instance = local = new RegistryService(); 045 } 046 return local; 047 } 048 049 /** 050 * Get the current registry service 051 * 052 * TODO the new upstream SharedMetricRegistries may make this obsolete 053 * @return the current registry service 054 */ 055 public MetricRegistry getMetrics() { 056 return METRICS; 057 } 058 059}