using sentinel feign in nacos discovery example

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-example/pom.xml

@@ -40,6 +40,11 @@
             <artifactId>spring-cloud-starter-feign</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
+        </dependency>
+
     </dependencies>
 
     <build>

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-example/src/main/java/org/springframework/cloud/alibaba/cloud/examples/ConsumerApplication.java

@@ -2,6 +2,7 @@ package org.springframework.cloud.alibaba.cloud.examples;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.alibaba.cloud.examples.ConsumerApplication.EchoService;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 import org.springframework.cloud.netflix.feign.EnableFeignClients;
@@ -10,6 +11,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.client.RestTemplate;
 
 /**
@@ -20,22 +22,50 @@ import org.springframework.web.client.RestTemplate;
 @EnableFeignClients
 public class ConsumerApplication {
 
-    @LoadBalanced
+	@LoadBalanced
-    @Bean
+	@Bean
-    public RestTemplate restTemplate() {
+	public RestTemplate restTemplate() {
-        return new RestTemplate();
+		return new RestTemplate();
-    }
+	}
 
+	public static void main(String[] args) {
+		SpringApplication.run(ConsumerApplication.class, args);
+	}
 
+	@FeignClient(name = "service-provider", fallback = EchoServiceFallback.class, configuration = FeignConfiguration.class)
+	public interface EchoService {
+		@RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
+		String echo(@PathVariable("str") String str);
 
+		@RequestMapping(value = "/divide", method = RequestMethod.GET)
+		String divide(@RequestParam("a") Integer a, @RequestParam("b") Integer b);
 
-    public static void main(String[] args) {
+		@RequestMapping(value = "/notFound", method = RequestMethod.GET)
-        SpringApplication.run(ConsumerApplication.class, args);
+		String notFound();
-    }
+	}
 
-    @FeignClient(name = "service-provider")
+}
-    public interface EchoService {
+
-        @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
+class FeignConfiguration {
-        String echo(@PathVariable("str") String str);
+	@Bean
-    }
+	public EchoServiceFallback echoServiceFallback() {
+		return new EchoServiceFallback();
+	}
+}
+
+class EchoServiceFallback implements EchoService {
+	@Override
+	public String echo(@PathVariable("str") String str) {
+		return "echo fallback";
+	}
+
+	@Override
+	public String divide(@RequestParam Integer a, @RequestParam Integer b) {
+		return "divide fallback";
+	}
+
+	@Override
+	public String notFound() {
+		return "notFound fallback";
+	}
 }

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-example/src/main/java/org/springframework/cloud/alibaba/cloud/examples/TestController.java

@@ -6,6 +6,7 @@ import org.springframework.cloud.client.discovery.DiscoveryClient;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.client.RestTemplate;
 
@@ -15,31 +16,42 @@ import org.springframework.web.client.RestTemplate;
 @RestController
 public class TestController {
 
-    @Autowired
+	@Autowired
-    private RestTemplate restTemplate;
+	private RestTemplate restTemplate;
-    @Autowired
+	@Autowired
-    private EchoService echoService;
+	private EchoService echoService;
 
+	@Autowired
+	private DiscoveryClient discoveryClient;
 
-    @Autowired
+	@RequestMapping(value = "/echo-rest/{str}", method = RequestMethod.GET)
-    private DiscoveryClient discoveryClient;
+	public String rest(@PathVariable String str) {
+		return restTemplate.getForObject("http://service-provider/echo/" + str,
+				String.class);
+	}
 
-    @RequestMapping(value = "/echo-rest/{str}", method = RequestMethod.GET)
+	@RequestMapping(value = "/notFound-feign", method = RequestMethod.GET)
-    public String rest(@PathVariable String str) {
+	public String notFound() {
-        return restTemplate.getForObject("http://service-provider/echo/" + str, String.class);
+		return echoService.notFound();
-    }
+	}
-    @RequestMapping(value = "/echo-feign/{str}", method = RequestMethod.GET)
-    public String feign(@PathVariable String str) {
-        return echoService.echo(str);
-    }
 
+	@RequestMapping(value = "/divide-feign", method = RequestMethod.GET)
+	public String divide(@RequestParam Integer a, @RequestParam Integer b) {
+		return echoService.divide(a, b);
+	}
 
-    @RequestMapping(value="/services/{service}",method = RequestMethod.GET)
+	@RequestMapping(value = "/echo-feign/{str}", method = RequestMethod.GET)
-    public Object client(@PathVariable String service){
+	public String feign(@PathVariable String str) {
-        return discoveryClient.getInstances(service);
+		return echoService.echo(str);
-    }
+	}
-    @RequestMapping(value="/services",method = RequestMethod.GET)
+
-    public Object services(){
+	@RequestMapping(value = "/services/{service}", method = RequestMethod.GET)
-        return discoveryClient.getServices();
+	public Object client(@PathVariable String service) {
-    }
+		return discoveryClient.getInstances(service);
+	}
+
+	@RequestMapping(value = "/services", method = RequestMethod.GET)
+	public Object services() {
+		return discoveryClient.getServices();
+	}
 }

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

@@ -1,4 +1,12 @@
 spring.application.name=service-consumer
 server.port=18083
 management.endpoints.web.exposure.include=*
-spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
+spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
+
+feign.sentinel.enabled=true
+
+spring.cloud.sentinel.transport.dashboard=localhost:8080
+spring.cloud.sentinel.eager=true
+
+spring.cloud.sentinel.datasource.ds1.file.file=classpath: flowrule.json
+spring.cloud.sentinel.datasource.ds1.file.data-type=json

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-example/src/main/resources/flowrule.json

@@ -0,0 +1,10 @@
+[
+  {
+    "resource": "GET:http://service-provider/echo/{str}",
+    "controlBehavior": 0,
+    "count": 1,
+    "grade": 1,
+    "limitApp": "default",
+    "strategy": 0
+  }
+]

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

@@ -6,6 +6,7 @@ import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 /**
@@ -25,5 +26,10 @@ public class ProviderApplication {
 		public String echo(@PathVariable String string) {
 			return "hello Nacos Discovery " + string;
 		}
+
+		@RequestMapping(value = "/divide", method = RequestMethod.GET)
+		public String divide(@RequestParam Integer a, @RequestParam Integer b) {
+			return String.valueOf(a / b);
+		}
 	}
 }