多机摆设,负载均衡-LoadBalance

多机摆设,负载均衡-LoadBalance

1. 开启多个服务

多复制两个服务,将服务全部启动起来

此时多次访问原来的接口,发现

调用的还是同一个
我们对代码举行修改:

1. @Service
2. public class OrderService {
3.    
4.    
5.     private static final Logger log = LoggerFactory.getLogger(OrderService.class);
6.     @Autowired
7.     private OrderMapper orderMapper;
9.     @Resource
10.     private DiscoveryClient discoveryClient;
11.     @Autowired
12.     private RestTemplate restTemplate;
14.     private static AtomicInteger atomicInteger = new AtomicInteger(1);
15.     private static List<ServiceInstance> instances;
16.     @PostConstruct
17.     public void init() {
18.    
19.    
20.         instances = discoveryClient.getInstances("product-service");
21.     }
22.     public  OrderInfo getOrderList(int orderId){
23.    
24.    
25.         OrderInfo orderInfo = orderMapper.getOrderList(orderId);
26.         int index = atomicInteger.getAndIncrement() % instances.size();
27.         EurekaServiceInstance instance = (EurekaServiceInstance) instances.get(index);
28.         String url = instance.getUri() + "/product/getProduct?productId=" + orderInfo.getProductId();
29.         log.info(url);
30.         ProductInfo productInfo = restTemplate.getForObject(url,ProductInfo.class);
31.         orderInfo.setProductInfo(productInfo

复制代码