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.autoconfigure.web.client; 018 019import java.util.List; 020import java.util.stream.Collectors; 021 022import org.springframework.beans.factory.ObjectProvider; 023import org.springframework.boot.autoconfigure.AutoConfigureAfter; 024import org.springframework.boot.autoconfigure.EnableAutoConfiguration; 025import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; 026import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; 027import org.springframework.boot.autoconfigure.http.HttpMessageConverters; 028import org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration; 029import org.springframework.boot.web.client.RestTemplateBuilder; 030import org.springframework.boot.web.client.RestTemplateCustomizer; 031import org.springframework.context.annotation.Bean; 032import org.springframework.context.annotation.Configuration; 033import org.springframework.util.CollectionUtils; 034import org.springframework.web.client.RestTemplate; 035 036/** 037 * {@link EnableAutoConfiguration Auto-configuration} for {@link RestTemplate}. 038 * 039 * @author Stephane Nicoll 040 * @author Phillip Webb 041 * @since 1.4.0 042 */ 043@Configuration 044@AutoConfigureAfter(HttpMessageConvertersAutoConfiguration.class) 045@ConditionalOnClass(RestTemplate.class) 046public class RestTemplateAutoConfiguration { 047 048 private final ObjectProvider<HttpMessageConverters> messageConverters; 049 050 private final ObjectProvider<RestTemplateCustomizer> restTemplateCustomizers; 051 052 public RestTemplateAutoConfiguration( 053 ObjectProvider<HttpMessageConverters> messageConverters, 054 ObjectProvider<RestTemplateCustomizer> restTemplateCustomizers) { 055 this.messageConverters = messageConverters; 056 this.restTemplateCustomizers = restTemplateCustomizers; 057 } 058 059 @Bean 060 @ConditionalOnMissingBean 061 public RestTemplateBuilder restTemplateBuilder() { 062 RestTemplateBuilder builder = new RestTemplateBuilder(); 063 HttpMessageConverters converters = this.messageConverters.getIfUnique(); 064 if (converters != null) { 065 builder = builder.messageConverters(converters.getConverters()); 066 } 067 068 List<RestTemplateCustomizer> customizers = this.restTemplateCustomizers 069 .orderedStream().collect(Collectors.toList()); 070 if (!CollectionUtils.isEmpty(customizers)) { 071 builder = builder.customizers(customizers); 072 } 073 return builder; 074 } 075 076}