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}