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 javax.servlet.annotation.WebListener; 019 020import com.codahale.metrics.MetricRegistry; 021import com.codahale.metrics.health.HealthCheckRegistry; 022import com.codahale.metrics.servlets.AdminServletContextListener; 023 024/** 025 * A ServletContextListener to set the ServletContext attributes that the 026 * Metrics servlets expect. 027 * 028 * @author Edwin Shin 029 * @see <a 030 * href="http://metrics.codahale.com/manual/servlets/">http://metrics.codahale.com/manual/servlets/</a> 031 */ 032@WebListener 033public class MetricsContextListener extends AdminServletContextListener { 034 035 /** 036 * Get the metrics registry for fcrepo 037 * @return the metrics registry 038 */ 039 @Override 040 protected MetricRegistry getMetricRegistry() { 041 return RegistryService.getInstance().getMetrics(); 042 } 043 044 /** 045 * Provide a health-check registry 046 * TODO actually populate the health-check registry with checks 047 * @return a new health check registry 048 */ 049 @Override 050 protected HealthCheckRegistry getHealthCheckRegistry() { 051 return new HealthCheckRegistry(); 052 } 053}