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.http.commons.metrics; 019 020import io.micrometer.core.instrument.MeterRegistry; 021import io.micrometer.jersey2.server.DefaultJerseyTagsProvider; 022import io.micrometer.jersey2.server.MetricsApplicationEventListener; 023import org.springframework.web.context.support.WebApplicationContextUtils; 024 025import javax.servlet.ServletContext; 026import javax.ws.rs.core.Context; 027import javax.ws.rs.core.Feature; 028import javax.ws.rs.core.FeatureContext; 029 030/** 031 * Enables Micrometer metrics on Jersey APIs (still must be annotated with @Timed) 032 * 033 * @author pwinckles 034 */ 035public class MicrometerFeature implements Feature { 036 037 @Context 038 private ServletContext servletContext; 039 040 @Override 041 public boolean configure(final FeatureContext context) { 042 if (this.servletContext == null) { 043 return false; 044 } 045 final var appCtx = WebApplicationContextUtils.getWebApplicationContext(servletContext); 046 if (appCtx == null) { 047 return false; 048 } 049 050 final var registry = appCtx.getBean(MeterRegistry.class); 051 052 final var micrometerListener = new MetricsApplicationEventListener( 053 registry, 054 new DefaultJerseyTagsProvider(), 055 "http.server.requests", 056 false); 057 058 context.register(micrometerListener); 059 060 return true; 061 } 062 063}