spring.cloud.gateway.routes nacos动态更新

在Spring Cloud Gateway中，我们可以使用Nacos来实现动态路由的更新。Nacos是一个服务发现和配置管理平台，可以用来实现服务注册和发现、配置管理、动态路由等功能。下面是一个使用Nacos实现动态路由更新的示例代码：

@Configuration
public class GatewayConfig {

    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    @Autowired
    private NacosDiscoveryProperties nacosDiscoveryProperties;

    @Autowired
    private NacosRouteDefinitionRepository nacosRouteDefinitionRepository;

    @Bean
    public NacosRouteDefinitionRepository nacosRouteDefinitionRepository() {
        return new NacosRouteDefinitionRepository(nacosConfigProperties, nacosDiscoveryProperties);
    }

    @Bean
    public DynamicRouteServiceImpl dynamicRouteService() {
        return new DynamicRouteServiceImpl(nacosRouteDefinitionRepository);
    }

    @Bean
    public NacosGatewayProperties nacosGatewayProperties() {
        return new NacosGatewayProperties();
    }

    @Bean
    public NacosGatewayPropertiesManager nacosGatewayPropertiesManager() {
        return new NacosGatewayPropertiesManager(nacosConfigProperties, nacosGatewayProperties());
    }

    @Bean
    public GatewayProperties gatewayProperties() {
        return new GatewayProperties();
    }

    @Bean
    public DynamicRouteDefinitionLocator dynamicRouteDefinitionLocator() {
        return new NacosDynamicRouteDefinitionLocator(nacosGatewayPropertiesManager(), gatewayProperties());
    }

    @Bean
    public DynamicRouteDefinitionService dynamicRouteDefinitionService() {
        return new NacosDynamicRouteDefinitionService(nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteDefinitionWriter routeDefinitionWriter() {
        return new InMemoryRouteDefinitionRepository();
    }

    @Bean
    public RouteDefinitionRepository routeDefinitionRepository() {
        return new CompositeRouteDefinitionRepository(routeDefinitionWriter(), nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteDefinitionLocator routeDefinitionLocator() {
        return new CompositeRouteDefinitionLocator(dynamicRouteDefinitionLocator(), new PropertiesRouteDefinitionLocator(gatewayProperties()));
    }

    @Bean
    public RouteRefreshListener routeRefreshListener() {
        return new RouteRefreshListener(dynamicRouteService());
    }

    @Bean
    public RouteRefreshAutoConfiguration routeRefreshAutoConfiguration() {
        return new RouteRefreshAutoConfiguration(dynamicRouteService(), routeRefreshListener());
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public RouteDefinitionLocator routeDefinitionLocator() {
        return new CompositeRouteDefinitionLocator(dynamicRouteDefinitionLocator(), new PropertiesRouteDefinitionLocator(gatewayProperties()));
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public RouteDefinitionWriter routeDefinitionWriter() {
        return new InMemoryRouteDefinitionRepository();
    }

    @Bean
    public RouteDefinitionRepository routeDefinitionRepository() {
        return new CompositeRouteDefinitionRepository(routeDefinitionWriter(), nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteRefreshListener routeRefreshListener() {
        return new RouteRefreshListener(dynamicRouteService());
    }

    @Bean
    public RouteRefreshAutoConfiguration routeRefreshAutoConfiguration() {
        return new RouteRefreshAutoConfiguration(dynamicRouteService(), routeRefreshListener());
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public RouteDefinitionLocator routeDefinitionLocator() {
        return new CompositeRouteDefinitionLocator(dynamicRouteDefinitionLocator(), new PropertiesRouteDefinitionLocator(gatewayProperties()));
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public GatewayProperties gatewayProperties() {
        return new GatewayProperties();
    }

    @Bean
    public RouteDefinitionWriter routeDefinitionWriter() {
        return new InMemoryRouteDefinitionRepository();
    }

    @Bean
    public RouteDefinitionRepository routeDefinitionRepository() {
        return new CompositeRouteDefinitionRepository(routeDefinitionWriter(), nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteLocator routeLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public RouteDefinitionLocator routeDefinitionLocator() {
        return new CompositeRouteDefinitionLocator(dynamicRouteDefinitionLocator(), new PropertiesRouteDefinitionLocator(gatewayProperties()));
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public GatewayFilterChainFilter gatewayFilterChainFilter(RouteLocator routeLocator, List<GlobalFilter> globalFilters) {
        return new GatewayFilterChainFilter(routeLocator, globalFilters);
    }

    @Bean
    public GlobalFilterAdder globalFilterAdder(List<GlobalFilter> globalFilters) {
        return new GlobalFilterAdder(globalFilters);
    }

    @Bean
    @ConditionalOnMissingBean
    public NacosRouteDefinitionRepository nacosRouteDefinitionRepository() {
        return new NacosRouteDefinitionRepository(nacosConfigProperties, nacosDiscoveryProperties);
    }

    @Bean
    public NacosGatewayProperties nacosGatewayProperties() {
        return new NacosGatewayProperties();
    }

    @Bean
    public NacosGatewayPropertiesManager nacosGatewayPropertiesManager() {
        return new NacosGatewayPropertiesManager(nacosConfigProperties, nacosGatewayProperties());
    }

    @Bean
    public DynamicRouteDefinitionLocator dynamicRouteDefinitionLocator() {
        return new NacosDynamicRouteDefinitionLocator(nacosGatewayPropertiesManager(), gatewayProperties());
    }

    @Bean
    public DynamicRouteDefinitionService dynamicRouteDefinitionService() {
        return new NacosDynamicRouteDefinitionService(nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteDefinitionWriter routeDefinitionWriter() {
        return new InMemoryRouteDefinitionRepository();
    }

    @Bean
    public RouteDefinitionRepository routeDefinitionRepository() {
        return new CompositeRouteDefinitionRepository(routeDefinitionWriter(), nacosRouteDefinitionRepository());
    }

    @Bean
    public RouteRefreshListener routeRefreshListener() {
        return new RouteRefreshListener(dynamicRouteService());
    }

    @Bean
    public RouteRefreshAutoConfiguration routeRefreshAutoConfiguration() {
        return new RouteRefreshAutoConfiguration(dynamicRouteService(), routeRefreshListener());
    }

    @Bean
    public RouteDefinitionRouteLocator routeDefinitionRouteLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public RouteLocator routeLocator(RouteDefinitionLocator routeDefinitionLocator) {
        return new RouteDefinitionRouteLocator(routeDefinitionLocator);
    }

    @Bean
    public GatewayFilterChainFilter gatewayFilterChainFilter(RouteLocator routeLocator, List<GlobalFilter> globalFilters) {
        return new GatewayFilterChainFilter(routeLocator, globalFilters);
    }

    @Bean
    public GlobalFilterAdder globalFilterAdder(List<GlobalFilter> globalFilters) {
        return new GlobalFilterAdder(globalFilters);
    }

}

在上面的代码中，我们定义了一个GatewayConfig类，用来配置Spring Cloud Gateway的相关组件。首先，我们注入了NacosConfigProperties、NacosDiscoveryProperties和NacosRouteDefinitionRepository等相关组件。然后，我们定义了DynamicRouteServiceImpl、NacosGatewayProperties、NacosGatewayPropertiesManager、GatewayProperties、DynamicRouteDefinitionLocator、DynamicRouteDefinitionService、RouteDefinitionWriter、RouteDefinitionRepository、RouteRefreshListener、RouteRefreshAutoConfiguration、RouteDefinitionRouteLocator、RouteLocator、GatewayFilterChainFilter和GlobalFilterAdder等相关组件。

通过配置这些组件，我们可以实现基于Nacos的动态路由更新功能。具体来说，我们通过NacosRouteDefinitionRepository将动态路由定义保存到Nacos配置中心，然后通过DynamicRouteServiceImpl实现动态路由的更新。在实际使用中，我们可以通过Nacos配置中心来管理动态路由的配置，从而实现路由的动态更新。