Zuul实现微服务的API网关(三)

2023-04-10 07:06:33 浏览数 (1)

5. 实现API监控

Zuul支持API监控,可以通过/actuator/routes端点查看当前的路由规则。以下是一个示例代码:

代码语言:javascript复制
management:
  endpoints:
    web:
      exposure:
        include: routes

spring:
  application:
    name: zuul-gateway

在上面的代码中,我们通过配置/actuator/routes端点的暴露来启用API监控。可以通过访问http://localhost:8080/actuator/routes来查看当前的路由规则。

6. 示例

以下是一个完整的Zuul示例,包括路由、过滤、缓存和API监控:

代码语言:javascript复制
@EnableZuulProxy
@EnableCaching
@SpringBootApplication
public class ZuulApplication {

    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class, args);
    }

    @Autowired
    private RouteLocator routeLocator;

    @Autowired
    private CacheManager cacheManager;

    @Bean
    public ZuulFilter myFilter() {
        return new ZuulFilter() {
            @Override
            public String filterType() {
                return "pre";
            }

            @Override
            public int filterOrder() {
                return 0;
            }

            @Override
            public boolean shouldFilter() {
                return true;
            }

            @Override
            public Object run() throws ZuulException {
                RequestContext context = RequestContext.getCurrentContext();
                HttpServletRequest request = context.getRequest();
                HttpServletResponse response = context.getResponse();
                // 对请求或响应进行处理
                return null;
            }
        };
    }

    @RequestMapping("/users/{id}")
    @Cacheable(value = "users", key = "#id")
    public User getUserById(@PathVariable Long id) {
        // 从数据库中获取用户信息
        return userRepository.findById(id);
    }

    @GetMapping("/actuator/routes")
    public Map<String, Object> getRoutes() {
        List<Route> routes = routeLocator.getRoutes();
        Map<String, Object> result = new HashMap<>();
        result.put("routes", routes);
        return result;
    }
}

在上面的示例代码中,我们定义了一个Zuul应用,并启用了路由、过滤、缓存和API监控功能。可以根据实际需求进行修改和扩展。

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