没有实战过微服务架构的人，不能说真懂微服务。因为除了技术的实现，这其中还涉及了难以量化的业务拆分和组件化思想。这门课就带大家以电商工程为例，基于Spring Cloud / SpringCloud Alibaba ，
融合常用组件/中间件，进行微服务架构设计和开发，获取真正的企业级微服务解决方案。
链接：https://pan.baidu.com/s/1Ypi4RAch5EXivNc5TvNfpQ
提取码：9gl1
失效+\/❤：x923713
/**
* <h1>网关需要注入到容器中的 Bean</h1>
* */
public class GatewayBeanConf {
public RestTemplate restTemplate() {
return new RestTemplate();
}
}package com.imooc.ecommerce.config;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
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 java.util.List;
/**
* 事件推送 Aware: 动态更新路由网关 Service
* */
("all")
public class DynamicRouteServiceImpl implements ApplicationEventPublisherAware {
/** 写路由定义 */
private final RouteDefinitionWriter routeDefinitionWriter;
/** 获取路由定义 */
private final RouteDefinitionLocator routeDefinitionLocator;
/** 事件发布 */
private ApplicationEventPublisher publisher;
public DynamicRouteServiceImpl(RouteDefinitionWriter routeDefinitionWriter,
RouteDefinitionLocator routeDefinitionLocator) {
this.routeDefinitionWriter = routeDefinitionWriter;
this.routeDefinitionLocator = routeDefinitionLocator;
}
public void setApplicationEventPublisher(
ApplicationEventPublisher applicationEventPublisher) {
// 完成事件推送句柄的初始化
this.publisher = applicationEventPublisher;
}
/**
* <h2>增加路由定义</h2>
* */
public String addRouteDefinition(RouteDefinition definition) {
log.info("gateway add route: [{}]", definition);
// 保存路由配置并发布
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
// 发布事件通知给 Gateway, 同步新增的路由定义
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
}
/**
* <h2>更新路由</h2>
* */
public String updateList(List<RouteDefinition> definitions) {
log.info("gateway update route: [{}]", definitions);
// 先拿到当前 Gateway 中存储的路由定义
List<RouteDefinition> routeDefinitionsExits =
routeDefinitionLocator.getRouteDefinitions().buffer().blockFirst();
if (!CollectionUtils.isEmpty(routeDefinitionsExits)) {
// 清除掉之前所有的 "旧的" 路由定义
routeDefinitionsExits.forEach(rd -> {
log.info("delete route definition: [{}]", rd);
deleteById(rd.getId());
});
}
// 把更新的路由定义同步到 gateway 中
definitions.forEach(definition -> updateByRouteDefinition(definition));
return "success";
}
/**
* <h2>根据路由 id 删除路由配置</h2>
* */
private String deleteById(String id) {
try {
log.info("gateway delete route id: [{}]", id);
this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
// 发布事件通知给 gateway 更新路由定义
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "delete success";
} catch (Exception ex) {
log.error("gateway delete route fail: [{}]", ex.getMessage(), ex);
return "delete fail";
}
}
/**
* <h2>更新路由</h2>
* 更新的实现策略比较简单: 删除 + 新增 = 更新
* */
private String updateByRouteDefinition(RouteDefinition definition) {
try {
log.info("gateway update route: [{}]", definition);
this.routeDefinitionWriter.delete(Mono.just(definition.getId()));
} catch (Exception ex) {
return "update fail, not find route routeId: " + definition.getId();
}
try {
this.routeDefinitionWriter.save(Mono.just(definition)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
} catch (Exception ex) {
return "update route fail";
}
}
}/**
* <h1>通过 nacos 下发动态路由配置, 监听 Nacos 中路由配置变更</h1>
* */
({"gatewayConfig"})
public class DynamicRouteServiceImplByNacos {
/** Nacos 配置服务 */
private ConfigService configService;
private final DynamicRouteServiceImpl dynamicRouteService;
public DynamicRouteServiceImplByNacos(DynamicRouteServiceImpl dynamicRouteService) {
this.dynamicRouteService = dynamicRouteService;
}
/**
* <h2>Bean 在容器中构造完成之后会执行 init 方法</h2>
* */
public void init() {
log.info("gateway route init....");
try {
// 初始化 Nacos 配置客户端
configService = initConfigService();
if (null == configService) {
log.error("init config service fail");
return;
}
// 通过 Nacos Config 并指定路由配置路径去获取路由配置
String configInfo = configService.getConfig(
GatewayConfig.NACOS_ROUTE_DATA_ID,
GatewayConfig.NACOS_ROUTE_GROUP,
GatewayConfig.DEFAULT_TIMEOUT
);
log.info("get current gateway config: [{}]", configInfo);
List<RouteDefinition> definitionList =
JSON.parseArray(configInfo, RouteDefinition.class);
if (CollectionUtils.isNotEmpty(definitionList)) {
for (RouteDefinition definition : definitionList) {
log.info("init gateway config: [{}]", definition.toString());
dynamicRouteService.addRouteDefinition(definition);
}
}
} catch (Exception ex) {
log.error("gateway route init has some error: [{}]", ex.getMessage(), ex);
}
// 设置监听器
dynamicRouteByNacosListener(GatewayConfig.NACOS_ROUTE_DATA_ID,
GatewayConfig.NACOS_ROUTE_GROUP);
}
/**
* <h2>初始化 Nacos Config</h2>
* */
private ConfigService initConfigService() {
try {
Properties properties = new Properties();
properties.setProperty("serverAddr", GatewayConfig.NACOS_SERVER_ADDR);
properties.setProperty("namespace", GatewayConfig.NACOS_NAMESPACE);
return configService = NacosFactory.createConfigService(properties);
} catch (Exception ex) {
log.error("init gateway nacos config error: [{}]", ex.getMessage(), ex);
return null;
}
}
/**
* <h2>监听 Nacos 下发的动态路由配置</h2>
* */
private void dynamicRouteByNacosListener(String dataId, String group) {
try {
// 给 Nacos Config 客户端增加一个监听器
configService.addListener(dataId, group, new Listener() {
/**
* <h2>自己提供线程池执行操作</h2>
* */
public Executor getExecutor() {
return null;
}
/**
* <h2>监听器收到配置更新</h2>
* @param configInfo Nacos 中最新的配置定义
* */
public void receiveConfigInfo(String configInfo) {
log.info("start to update config: [{}]", configInfo);
List<RouteDefinition> definitionList =
JSON.parseArray(configInfo, RouteDefinition.class);
log.info("update route: [{}]", definitionList.toString());
dynamicRouteService.updateList(definitionList);
}
});
} catch (NacosException ex) {
log.error("dynamic update gateway config error: [{}]", ex.getMessage(), ex);
}
}
}/**
* <h1>配置登录请求转发规则</h1>
* */
public class RouteLocatorConfig {
/**
* <h2>使用代码定义路由规则, 在网关层面拦截下登录和注册接口</h2>
* */
public RouteLocator loginRouteLocator(RouteLocatorBuilder builder) {
// 手动定义 Gateway 路由规则需要指定 id、path 和 uri
return builder.routes()
.route(
"e_commerce_authority",
r -> r.path(
"/imooc/e-commerce/login",
"/imooc/e-commerce/register"
).uri("http://localhost:9001/")
).build();
}
}
链接：https://pan.baidu.com/s/1Ypi4RAch5EXivNc5TvNfpQ
提取码：9gl1
失效+\/❤：x923713
