在数据库中持久化Spring云网关路由

Question

我目前正在使用spring cloud gateway项目构建简单的api网关，计划将路由持久化到mongodb中，然后刷新，这样新的路由就可以使用了。我做了一些像这样简单的事情来获得我从蒙哥的路线。

@Bean
public RouteLocator routeLocator(RouteLocatorBuilder builder){
    List<CreateAPIRequest> apiRequestList = repository.findAll();
    RouteLocatorBuilder.Builder routeLocator = builder.routes();
    for (CreateAPIRequest request: apiRequestList) {
        routeLocator
        .route(r-> {
              r.path("/"+request.getProxy().getListenPath())
             .filters(f->f.stripPrefix(1))
             .uri(request.getProxy().getTargetUrl()) 
        });
    }
    return routeLocator.build();
}

我可以在数据库中创建新的路由，但我无法在飞行中刷新。

Answer 1

每当您希望动态更新路由时，发送RefreshRoutesEvent。下面的组件实现事件发送功能。

@Component
public class GatewayRoutesRefresher implements ApplicationEventPublisherAware {

    ApplicationEventPublisher publisher;

    @Override
    public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
        publisher = applicationEventPublisher;
    }

    public void refreshRoutes() {
        publisher.publishEvent(new RefreshRoutesEvent(this));
    }
}

下面是一个示例，演示如何使用上面的组件：

@Autowired
GatewayRoutesRefresher gatewayRoutesRefresher;
...
public void buildRoutes() {
    // build your routes basing on your db entries then refresh the routes in gateway
    ...
    gatewayRoutesRefresher.refreshRoutes();
}

通过查看以下项目代码，您可以更完整地了解这个概念：https://github.com/botorabi/homiecenter