Springcloud实战之自研分布式id生成器

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@EnableDiscoveryClient
public class IdController {

    private static final String SERVICE_ID = "id-generator";

    @Autowired
    private DiscoveryClient discoveryClient;

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/id")
    public Long getId(@RequestParam(value = "count", defaultValue = "1") int count) {
        // 获取服务实例
        String serviceInstance = discoveryClient.getInstances(SERVICE_ID).get(0).getUri().toString();
        // 调用服务获取ID
        return restTemplate.getForObject(serviceInstance + "/id?count={count}", Long.class, count);
    }
}