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Cattle framework cloud discovery common component pom
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/*
 * Copyright (C) 2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.cattleframework.cloud.discovery.enhancement;

import java.util.ArrayList;
import java.util.List;

import org.cattleframework.cloud.discovery.DiscoveryConstants;
import org.cattleframework.cloud.discovery.enhancement.feign.EnhancedLoadBalancerFeignRequestTransformer;
import org.cattleframework.cloud.discovery.enhancement.feign.FeignBeanPostProcessor;
import org.cattleframework.cloud.discovery.enhancement.filter.ReactiveFilter;
import org.cattleframework.cloud.discovery.enhancement.filter.ServletFilter;
import org.cattleframework.cloud.discovery.enhancement.plugin.DefaultPluginRunner;
import org.cattleframework.cloud.discovery.enhancement.plugin.Plugin;
import org.cattleframework.cloud.discovery.enhancement.plugin.PluginRunner;
import org.cattleframework.cloud.discovery.enhancement.resttemplate.RestTemplateInterceptor;
import org.cattleframework.cloud.discovery.enhancement.resttemplate.RestTemplateLoadBalancerRequestTransformer;
import org.cattleframework.cloud.discovery.enhancement.scg.GatewayFilter;
import org.cattleframework.cloud.discovery.enhancement.webclient.WebClientExchangeFilterFunction;
import org.cattleframework.cloud.discovery.enhancement.webclient.WebClientLoadBalancerClientRequestTransformer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor;
import org.springframework.cloud.client.loadbalancer.RestTemplateCustomizer;
import org.springframework.cloud.client.loadbalancer.reactive.WebClientCustomizer;
import org.springframework.cloud.client.serviceregistry.Registration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Lazy;
import org.springframework.context.annotation.Role;
import org.springframework.http.client.ClientHttpRequestInterceptor;

import jakarta.servlet.DispatcherType;

/**
 * 增强自动配置
 * 
 * @author orange
 *
 */
@Configuration(proxyBeanMethods = false)
@ConditionalOnProperty(value = "cattle.cloud.enhancement.enabled", havingValue = "true", matchIfMissing = true)
public class EnhancementConfiguration {

    @Bean
    @Lazy
    public PluginRunner pluginRunner(@Autowired(required = false) List plugins,
	    @Autowired(required = false) Registration registration) {
	return new DefaultPluginRunner(plugins, registration);
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnClass(name = "org.springframework.cloud.openfeign.FeignAutoConfiguration")
    @AutoConfigureBefore(name = "org.springframework.cloud.openfeign.FeignAutoConfiguration")
    @Role(RootBeanDefinition.ROLE_INFRASTRUCTURE)
    public static class FeignClientAutoConfiguration {

	@Bean
	public FeignBeanPostProcessor feignBeanPostProcessor(@Lazy PluginRunner pluginRunner) {
	    return new FeignBeanPostProcessor(pluginRunner);
	}

	@Bean
	@ConditionalOnMissingBean
	@ConditionalOnClass(name = {
		"org.springframework.cloud.openfeign.loadbalancer.LoadBalancerFeignRequestTransformer" })
	public EnhancedLoadBalancerFeignRequestTransformer enhancedLoadBalancerFeignRequestTransformer() {
	    return new EnhancedLoadBalancerFeignRequestTransformer();
	}
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
    public static class RestTemplateAutoConfiguration {

	@Bean
	public RestTemplateInterceptor restTemplateInterceptor(@Lazy PluginRunner pluginRunner) {
	    return new RestTemplateInterceptor(pluginRunner);
	}

	@Bean
	@ConditionalOnMissingBean
	public RestTemplateCustomizer restTemplateCustomizer(LoadBalancerInterceptor loadBalancerInterceptor,
		RestTemplateInterceptor restTemplateInterceptor) {
	    return restTemplate -> {
		List list = new ArrayList<>(restTemplate.getInterceptors());
		list.add(loadBalancerInterceptor);
		list.add(restTemplateInterceptor);
		restTemplate.setInterceptors(list);
	    };
	}

	@Bean
	@ConditionalOnMissingBean
	@ConditionalOnClass(name = { "org.springframework.cloud.client.loadbalancer.LoadBalancerRequestTransformer" })
	public RestTemplateLoadBalancerRequestTransformer restTemplateLoadBalancerRequestTransformer() {
	    return new RestTemplateLoadBalancerRequestTransformer();
	}
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnClass(name = "org.springframework.web.reactive.function.client.WebClient")
    public static class WebClientAutoConfiguration {

	@Bean
	public WebClientExchangeFilterFunction webClientExchangeFilterFunction(@Lazy PluginRunner pluginRunner) {
	    return new WebClientExchangeFilterFunction(pluginRunner);
	}

	@Bean
	@ConditionalOnMissingBean
	public WebClientCustomizer webClientCustomizer(
		WebClientExchangeFilterFunction webClientExchangeFilterFunction) {
	    return webClientBuilder -> {
		webClientBuilder.filter(webClientExchangeFilterFunction);
	    };
	}

	@Bean
	@ConditionalOnMissingBean
	@ConditionalOnClass(name = "org.springframework.cloud.client.loadbalancer.reactive.LoadBalancerClientRequestTransformer")
	public WebClientLoadBalancerClientRequestTransformer webClientLoadBalancerClientRequestTransformer() {
	    return new WebClientLoadBalancerClientRequestTransformer();
	}
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnClass(name = "org.springframework.cloud.gateway.config.GatewayAutoConfiguration")
    @Role(RootBeanDefinition.ROLE_INFRASTRUCTURE)
    public static class GatewayAutoConfiguration {

	@Bean
	@ConditionalOnClass(name = "org.springframework.cloud.gateway.filter.GlobalFilter")
	public GatewayFilter gatewayFilter(@Lazy PluginRunner pluginRunner) {
	    return new GatewayFilter(pluginRunner);
	}
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
    public static class ServletFilterConfig {

	@Bean
	public FilterRegistrationBean servletFilterRegistrationBean(ServletFilter servletFilter) {
	    FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean<>(servletFilter);
	    filterRegistrationBean.setDispatcherTypes(DispatcherType.ASYNC, DispatcherType.ERROR,
		    DispatcherType.FORWARD, DispatcherType.INCLUDE, DispatcherType.REQUEST);
	    filterRegistrationBean.setOrder(DiscoveryConstants.Order.Server.Servlet.ENHANCED_FILTER_ORDER);
	    return filterRegistrationBean;
	}

	@Bean
	public ServletFilter servletFilter(@Lazy PluginRunner pluginRunner) {
	    return new ServletFilter(pluginRunner);
	}
    }

    @Configuration(proxyBeanMethods = false)
    @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
    public static class ReactiveFilterConfig {

	@Bean
	public ReactiveFilter reactiveFilter(@Lazy PluginRunner pluginRunner) {
	    return new ReactiveFilter(pluginRunner);
	}
    }
}