nacos gateway动态路由
Posted java架构宝典
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了nacos gateway动态路由相关的知识，希望对你有一定的参考价值。
*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:
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spring cloud集成nacos配置中心
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
点亮 ，告诉大家你也在看
以上是关于nacos gateway动态路由的主要内容，如果未能解决你的问题，请参考以下文章