SpringCloud环境搭建-gateway-动态路由

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  1. nacos添加动态路由配置文件gateway-router，json类型
[
    {
        "id": "test1",
        "order": 0,
        "predicates": [
            {
                "args": {
                    "pattern": "/test/**"
                },
                "name": "Path"
            }
        ],
        "uri": "lb://test"
    }
]
  1. 添加配置动态路由配置类
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.Executor;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.context.annotation.Configuration;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.PropertyKeyConst;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;

import reactor.core.publisher.Mono;

@Configuration
public class NacosDynamicRouteService implements ApplicationEventPublisherAware {
 
    private String dataId = "gateway-router";
 
    private String group = "DEFAULT_GROUP";
 
    @Value("${spring.cloud.nacos.config.server-addr}")
    private String serverAddr;
    
    @Value("${spring.cloud.nacos.config.namespace}")
    private String namespace;
 
    @Autowired
    private RouteDefinitionWriter routeDefinitionWriter;
 
    private ApplicationEventPublisher applicationEventPublisher;
 
    private static final List<String> ROUTE_LIST = new ArrayList<>();
 
    @PostConstruct
    public void dynamicRouteByNacosListener() {
        try {
    		Properties properties = new Properties();
    		properties.put(PropertyKeyConst.SERVER_ADDR, serverAddr);
    		properties.put(PropertyKeyConst.NAMESPACE, namespace);
            ConfigService configService = NacosFactory.createConfigService(properties);
            configService.getConfig(dataId, group, 5000);
            configService.addListener(dataId, group, new Listener() {
                @Override
                public void receiveConfigInfo(String configInfo) {
                    clearRoute();
                    try {
                        List<RouteDefinition> gatewayRouteDefinitions = JSONObject.parseArray(configInfo, RouteDefinition.class);
                        for (RouteDefinition routeDefinition : gatewayRouteDefinitions) {
                            addRoute(routeDefinition);
                        }
                        publish();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
 
                @Override
                public Executor getExecutor() {
                    return null;
                }
            });
        } catch (NacosException e) {
            e.printStackTrace();
        }
    }
 
    private void clearRoute() {
        for(String id : ROUTE_LIST) {
            this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
        }
        ROUTE_LIST.clear();
    }
 
    private void addRoute(RouteDefinition definition) {
        try {
            routeDefinitionWriter.save(Mono.just(definition)).subscribe();
            ROUTE_LIST.add(definition.getId());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    private void publish() {
        this.applicationEventPublisher.publishEvent(new RefreshRoutesEvent(this.routeDefinitionWriter));
    }
 
    @Override
    public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
        this.applicationEventPublisher = applicationEventPublisher;
    }
}
标题：SpringCloud环境搭建-gateway-动态路由
作者：weiweihaha
地址：http://blog.lijida.cn/articles/2020/03/14/1584179158165.html

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