Open-Feign的使用

集成Open-Feign实现远程方法调用

加入依赖启动类添加注解远程调用video代码controller代码 Open-Feign使用post方法实现远程传输

被调用的videoCon调用的Order

        
            org.springframework.cloud
            spring-cloud-starter-openfeign
        

调用方，我是order

//开启Feign支持
@EnableFeignClients

新建service通过Feign调用nacos的服务

//name="class-video-service" 引号里就是在nacos里被调用方的服务名
@FeignClient(name="class-video-service")
public interface VideoService {

    @GetMapping(value = "/api/v1/video/find_by_id")
    Video findById(@RequestParam("videoId") int videoId);

}

不需要像以前使用Ribbon restTemplate 那么麻烦，直接调用service即可，因为service会去nacos寻找需要调用的服务

@RestController
@RequestMapping("api/v1/video_order")
public class OrderController {

    @Autowired
    private VideoService videoService;

    @RequestMapping("/save")
    public Object save(int videoId){


        //法四，使用Fiegn进行远程调用
       // Video video = restTemplate.getForObject("http://class-video-service/api/v1/video/find_by_id?videoId="+videoId, Video.class);
        Video video = videoService.findById(videoId);

        VideoOrder videoOrder = new VideoOrder();

        videoOrder.setVideoId(video.getId());
        videoOrder.setVideoTitle(video.getTitle());
        videoOrder.setCreateTime(new Date());

        //这时候就可以从video那里获得ip和端口号
        videoOrder.setServerInfo(video.getServeInfo());

        return videoOrder;


    }

}

    @PostMapping("save1")
    public Object save1(@RequestBody Video video){
        System.out.println(video.getTitle());
        return video;
    }

service

    @PostMapping(value = "/api/v1/video/save1")
    int save1(@RequestBody  Video video);

OrderCon

    @RequestMapping("/save1")
    public Object save1(@RequestBody Video video){

        System.out.println(video.getTitle());
        return video;

    }

这时候调用/api/v1/video_order/save1 json格式传个title就会发现传参成功了