001/* 002 * Copyright 2012-2018 the original author or authors. 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 */ 016 017package org.springframework.boot.docs.actuate.metrics; 018 019import java.util.List; 020import java.util.concurrent.CopyOnWriteArrayList; 021 022import io.micrometer.core.instrument.MeterRegistry; 023import io.micrometer.core.instrument.Tags; 024 025/** 026 * Example to show injection and use of a {@link MeterRegistry}. 027 * 028 * @author Andy Wilkinson 029 */ 030public class MetricsMeterRegistryInjectionExample { 031 032 // tag::component[] 033 class Dictionary { 034 035 private final List<String> words = new CopyOnWriteArrayList<>(); 036 037 Dictionary(MeterRegistry registry) { 038 registry.gaugeCollectionSize("dictionary.size", Tags.empty(), this.words); 039 } 040 041 // … 042 043 } 044 // end::component[] 045 046}