update nacos-discovery-consumer-sclb-example

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-sclb-example/src/main/java/com/alibaba/cloud/examples/ConsumerSCLBApplication.java

@@ -16,17 +16,14 @@
 
 package com.alibaba.cloud.examples;
 
-import java.util.List;
-import java.util.Random;
-
 import com.alibaba.cloud.examples.ConsumerSCLBApplication.EchoService;
 import com.alibaba.cloud.sentinel.annotation.SentinelRestTemplate;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import reactor.core.publisher.Mono;
-
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.ServiceInstance;
@@ -50,6 +47,11 @@ import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.client.RestTemplate;
 
+import java.util.List;
+import java.util.Random;
+
+import reactor.core.publisher.Mono;
+
 /**
  * @author <a href="mailto:fangjian0423@gmail.com">Jim</a>
  */
@@ -161,12 +163,21 @@ public class ConsumerSCLBApplication {
 		@Autowired
 		private DiscoveryClient discoveryClient;
 
+		@Value("${spring.cloud.loadbalancer.zone:null}")
+		private String zone;
+
 		@GetMapping("/echo-rest/{str}")
 		public String rest(@PathVariable String str) {
 			return restTemplate.getForObject("http://service-provider/echo/" + str,
 					String.class);
 		}
 
+		@GetMapping("/zone")
+		public String zone() {
+			return "consumer zone " + zone + "\n" + restTemplate
+					.getForObject("http://service-provider/zone", String.class);
+		}
+
 		@GetMapping("/echo-feign/{str}")
 		public String feign(@PathVariable String str) {
 			return echoService.echo(str);

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-sclb-example/src/main/resources/application.properties

@@ -7,6 +7,8 @@ spring.cloud.nacos.username=nacos
 spring.cloud.nacos.password=nacos
 
 spring.cloud.loadbalancer.ribbon.enabled=false
+spring.cloud.loadbalancer.configurations=zone-preference
+spring.cloud.loadbalancer.zone=hangzhou
 
 feign.sentinel.enabled=true
 

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-provider-example/src/main/java/com/alibaba/cloud/examples/ProviderApplication.java

@@ -16,6 +16,12 @@
 
 package com.alibaba.cloud.examples;
 
+import java.util.Map;
+
+import javax.annotation.Resource;
+
+import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@@ -40,6 +46,9 @@ public class ProviderApplication {
 	@RestController
 	class EchoController {
 
+		@Resource
+		private NacosDiscoveryProperties nacosDiscoveryProperties;
+
 		@GetMapping("/")
 		public ResponseEntity index() {
 			return new ResponseEntity("index error", HttpStatus.INTERNAL_SERVER_ERROR);
@@ -71,6 +80,12 @@ public class ProviderApplication {
 			return String.valueOf(a / b);
 		}
 
+		@GetMapping("/zone")
+		public String zone() {
+			Map<String, String> metadata = nacosDiscoveryProperties.getMetadata();
+			return "provider zone " + metadata.get("zone");
+		}
+
 	}
 
 }