之前项目用的网关如果需要实现路由的动态刷新的话,往往需要停机更新,这是不允许的。因为是网关服务。肯定不可以随便停机的。
依赖
<!-- 引入nacos服务发现、配置中心-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
启动类加入注解
@EnableDiscoveryClient
@EnableZuulProxy
public class GatewayApplication {
public static void main(String[] args) {
SpringApplication.run(GatewayApplication.class, args);
}
//......
}
配置 关键的配置类
package com.foodom.platform.gateway.config.nacos;
import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.netflix.zuul.RoutesRefreshedEvent;
import org.springframework.cloud.netflix.zuul.filters.CompositeRouteLocator;
import org.springframework.cloud.netflix.zuul.filters.ZuulProperties;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
@Slf4j
@Configuration
public class NacosServerConfig {
@Value("${nacos.serverAddr}")
private String serverAddr;
@Value("${nacos.namespace}")
private String namespace;
@Value("${nacos.dataId}")
private String dataId;
@Value("${nacos.group}")
private String group;
//路由信息配置在sso的数据库,所以通过feign获取到路由信息
private SsoFeignClient ssoFeignClient;
private CompositeRouteLocator compositeRouteLocator;
private ZuulProperties zuulProperties;
@Autowired
public NacosServerConfig(SsoFeignClient ssoFeignClient, CompositeRouteLocator compositeRouteLocator, ZuulProperties zuulProperties) {
this.ssoFeignClient = ssoFeignClient;
this.compositeRouteLocator = compositeRouteLocator;
this.zuulProperties = zuulProperties;
}
@Bean
public ConfigService configService(){
try {
Properties properties = new Properties();
properties.put("serverAddr",serverAddr);
//因为在nacos中添加了命名空间来区分不同的配置文件,所以需要添加 namespace 的参数
properties.put("namespace",namespace);
ConfigService configService = NacosFactory.createConfigService(properties);
//初次获取配置文件的内容
String content = configService.getConfig(dataId, group, 5000);
configService.addListener(dataId, group, new Listener() {
@Override
public Executor getExecutor() {
return null;
}
@Override
public void receiveConfigInfo(String s) {
log.info("gateway 路由动态刷新");
//由于我的网关的业务场景并不是很复杂,所以直接在这里实现路由的动态刷新就好了
//动态刷新业务代码
log.info("refresh result={}",zuulProperties.getRoutes());
}
});
return configService;
} catch (NacosException e) {
log.error("config service error ={}",e);
}
return null;
}
}
nacos
中的配置
最后不要忘了引用该 bean
@Autowired
private ConfigService configService;
结果:
未完待续…