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.actuate.metrics.web.reactive.server; 018 019import io.micrometer.core.instrument.Tag; 020 021import org.springframework.web.server.ServerWebExchange; 022 023/** 024 * Provides {@link Tag Tags} for WebFlux-based request handling. 025 * 026 * @author Jon Schneider 027 * @author Andy Wilkinson 028 * @since 2.0.0 029 */ 030@FunctionalInterface 031public interface WebFluxTagsProvider { 032 033 /** 034 * Provides tags to be associated with metrics for the given {@code exchange}. 035 * @param exchange the exchange 036 * @param ex the current exception (may be {@code null}) 037 * @return tags to associate with metrics for the request and response exchange 038 */ 039 Iterable<Tag> httpRequestTags(ServerWebExchange exchange, Throwable ex); 040 041}