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}