001/*
002 * Copyright 2012-2016 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;
018
019import java.util.ArrayList;
020import java.util.List;
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.web.client.RestTemplateBuilder;
028import org.springframework.boot.web.client.RestTemplateCustomizer;
029import org.springframework.context.annotation.Bean;
030import org.springframework.context.annotation.Configuration;
031import org.springframework.core.annotation.AnnotationAwareOrderComparator;
032import org.springframework.util.CollectionUtils;
033import org.springframework.web.client.RestTemplate;
034
035/**
036 * {@link EnableAutoConfiguration Auto-configuration} for web client.
037 *
038 * @author Stephane Nicoll
039 * @author Phillip Webb
040 * @since 1.4.0
041 */
042@Configuration
043@AutoConfigureAfter(HttpMessageConvertersAutoConfiguration.class)
044public class WebClientAutoConfiguration {
045
046        @Configuration
047        @ConditionalOnClass(RestTemplate.class)
048        public static class RestTemplateConfiguration {
049
050                private final ObjectProvider<HttpMessageConverters> messageConverters;
051
052                private final ObjectProvider<List<RestTemplateCustomizer>> restTemplateCustomizers;
053
054                public RestTemplateConfiguration(
055                                ObjectProvider<HttpMessageConverters> messageConverters,
056                                ObjectProvider<List<RestTemplateCustomizer>> restTemplateCustomizers) {
057                        this.messageConverters = messageConverters;
058                        this.restTemplateCustomizers = restTemplateCustomizers;
059                }
060
061                @Bean
062                @ConditionalOnMissingBean
063                public RestTemplateBuilder restTemplateBuilder() {
064                        RestTemplateBuilder builder = new RestTemplateBuilder();
065                        HttpMessageConverters converters = this.messageConverters.getIfUnique();
066                        if (converters != null) {
067                                builder = builder.messageConverters(converters.getConverters());
068                        }
069                        List<RestTemplateCustomizer> customizers = this.restTemplateCustomizers
070                                        .getIfAvailable();
071                        if (!CollectionUtils.isEmpty(customizers)) {
072                                customizers = new ArrayList<RestTemplateCustomizer>(customizers);
073                                AnnotationAwareOrderComparator.sort(customizers);
074                                builder = builder.customizers(customizers);
075                        }
076                        return builder;
077                }
078
079        }
080
081}