001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.fcrepo.metrics; 019 020import javax.servlet.annotation.WebListener; 021 022import com.codahale.metrics.MetricRegistry; 023import com.codahale.metrics.health.HealthCheckRegistry; 024import com.codahale.metrics.servlets.AdminServletContextListener; 025 026/** 027 * A ServletContextListener to set the ServletContext attributes that the 028 * Metrics servlets expect. 029 * 030 * @author Edwin Shin 031 * @see <a 032 * href="http://metrics.codahale.com/manual/servlets/">http://metrics.codahale.com/manual/servlets/</a> 033 */ 034@WebListener 035public class MetricsContextListener extends AdminServletContextListener { 036 037 /** 038 * Get the metrics registry for fcrepo 039 * @return the metrics registry 040 */ 041 @Override 042 protected MetricRegistry getMetricRegistry() { 043 return RegistryService.getInstance().getMetrics(); 044 } 045 046 /** 047 * Provide a health-check registry 048 * TODO actually populate the health-check registry with checks 049 * @return a new health check registry 050 */ 051 @Override 052 protected HealthCheckRegistry getHealthCheckRegistry() { 053 return new HealthCheckRegistry(); 054 } 055}