nacos gateway动态路由实战

nacos gateway动态路由

说明：本次测试使用的gateway是2.2.2.release版本，其他版本可能存在不同

一、引入本次测试需要的pom依赖

       <!--gateway网关依赖-->
        <dependency>
            <groupid>org.springframework.cloud</groupid>
            <artifactid>spring-cloud-starter-gateway</artifactid>
        </dependency>
        <!--nacos依赖-->
        <dependency>
            <groupid>com.alibaba.cloud</groupid>
            <artifactid>spring-cloud-starter-alibaba-nacos-config</artifactid>
        </dependency>
        <dependency>
            <groupid>com.alibaba.cloud</groupid>
            <artifactid>spring-cloud-starter-alibaba-nacos-discovery</artifactid>
        </dependency>
        <!--json工具包-->
        <dependency>
            <groupid>com.alibaba</groupid>
            <artifactid>fastjson</artifactid>
            <version>1.2.47</version>
        </dependency>

二、配置文件设置（*配置文件不生效的把名字改为bootstrap.yml）

server:
  port: 8200
 
spring:
  application:
    name: lc-gateway
 
  cloud:
    nacos:
      discovery:
        #注册中心地址
        server-addr: 106.12.146.239:8848
      config:
        server-addr: 106.12.146.239:8848
        # 配置中心-指定命名空间
        namespace: bb79a8c4-e4e1-4a27-bceb-0810f278b5aa
        # 指定配置文件后缀
        file-extension: yaml
        #配置组
        group: default_group
        #配置dateid
        data-id: lc-gateway
        #获取配置超时时间
        timeout: 5000
 
    gateway:
      #设置超时时间默认
      httpclient:
        connect-timeout: 1000
        response-timeout: 5s

ps：这里集成了nacos配置中心想了解详情请移步

三、动态路由实现

package com.lc.api.gateway.config;  
import com.alibaba.fastjson.jsonobject;
import com.alibaba.nacos.api.nacosfactory;
import com.alibaba.nacos.api.config.configservice;
import com.alibaba.nacos.api.config.listener.listener;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
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.stereotype.service;
import reactor.core.publisher.mono; 
import javax.annotation.postconstruct;
import java.util.arraylist;
import java.util.list;
import java.util.properties;
import java.util.concurrent.executor;
 
/**
 * 动态路由，可以通过获取bean才做该类，提供增删改查已经发布功能
 *
 * @author: lc
 * @date: 2020/7/8 15:49
 */
@service
public class dynamicrouteconfig implements applicationeventpublisheraware { 
    private static final logger logger = loggerfactory.getlogger(dynamicrouteconfig.class); 
    @autowired
    private routedefinitionwriter routedefinitionwriter; 
    private applicationeventpublisher publisher; 
    @value("${spring.cloud.nacos.config.data-id}")
    private string dataid;
    @value("${spring.cloud.nacos.config.group}")
    private string group;
    @value("${spring.cloud.nacos.config.server-addr}")
    private string serveraddr;
    @value("${spring.cloud.nacos.config.namespace}")
    private string namespace;
    @value("${spring.cloud.nacos.config.timeout}")
    private long timeout; 
    private static final list<string> route_list = new arraylist<>();
 
    @postconstruct
    public void dynamicroutebynacoslistener() {
        try {
            properties prop = new properties();
            prop.put("serveraddr", serveraddr);
            prop.put("namespace", namespace);
            configservice config = nacosfactory.createconfigservice(prop);
            string content = config.getconfig(dataid, group, timeout);
            publisher(content);
            config.addlistener(dataid, group, new listener() {
                @override
                public void receiveconfiginfo(string config) {
                    publisher(config);
                }
 
                @override
                public executor getexecutor() {
                    return null;
                }
            });
        } catch (exception e) {
            e.printstacktrace();
        }
    }
 
    /**
     * 增加路由
     *
     * @param def
     * @return
     */
    public boolean addroute(routedefinition def) {
        try {
            routedefinitionwriter.save(mono.just(def)).subscribe();
            route_list.add(def.getid());
        } catch (exception e) {
            e.printstacktrace();
        }
        return true;
    }
 
    /**
     * 删除路由
     *
     * @return
     */
    public boolean clearroute() {
        for (string id : route_list) {
            routedefinitionwriter.delete(mono.just(id)).subscribe();
        }
        route_list.clear();
        return boolean.false;
    }
 
    /**
     * 发布路由
     */
    private void publisher(string config) {
        clearroute();
        try {
            logger.info("start updating dynamic routing ....");
            list<routedefinition> routedefinitionlist = jsonobject.parsearray(config, routedefinition.class);
            for (routedefinition route : routedefinitionlist) {
                logger.info(route.tostring());
                addroute(route);
            }
            publisher.publishevent(new refreshroutesevent(this.routedefinitionwriter));
            logger.info("update completed ");
        } catch (exception e) {
            logger.error("failed to update routing information", e);
            e.printstacktrace();
        } 
    }
 
    @override
    public void setapplicationeventpublisher(applicationeventpublisher applicationeventpublisher) {
        publisher = applicationeventpublisher;
    } 
}

四、nacos配置中心设置

1.说明

2.新建一个网关配置

3. 添加配置格式如下

这里我就不注释了大家应该都能看懂

[
    {
        "filters": [
            {
                "args": {
                    "parts": "1"
                },
                "name": "stripprefix"
            }
        ],
        "id": "authent1",
        "order": -1,
        "predicates": [
            {
                "args": {
                    "pattern": "/authent/**"
                },
                "name": "path"
            }
        ],
        "uri": "lb://lc-authenticate"
    }
]

五、测试

gateway网关相关配置

创建，使用initilizer，

group：com.atguigu.gulimall
artifact： gulimall-gateway
package：com.atguigu.gulimall.gateway

搜索gateway选中。

pom.xml里加上common依赖，修改jdk版本

在启动类中添加注解@eeablediscoveryclient

配置nacos注册中心地址

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
spring.application.name=gulimall-gateway
server.port=88

bootstrap.properties 填写配置中心地址

spring.application.name=gulimall-gateway
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.cloud.nacos.config.namespace=ab66aff2-0bd5-4f80-8a68-760d6ff7d96d

nacos里创建命名空间gateway

然后在命名空间里创建文件guilmall-gateway.yml

spring:
    application:
        name: gulimall-gateway

在主类中屏蔽数据源

在项目里创建application.yml

spring:
  cloud:
    gateway:
      routes:
        - id: after_route
          uri: https://www.xiaomi.com
          predicates:
            - query=url,xiaomi
#            若参数等于断言 则跳转到指定的uri

运行结果

以上为个人经验，希望能给大家一个参考，也希望大家多多支持www.887551.com。

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