✅ Adding tests. add sentinel feign example

spring-cloud-alibaba-examples/pom.xml

@@ -20,6 +20,8 @@
         <module>sentinel-example/sentinel-dubbo-example/sentinel-dubbo-provider-example</module>
         <module>sentinel-example/sentinel-dubbo-example/sentinel-dubbo-consumer-example</module>
         <module>sentinel-example/sentinel-dubbo-example/sentinel-dubbo-api</module>
+        <module>sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example</module>
+        <module>sentinel-example/sentinel-feign-example/sentinel-feign-provider-example</module>
         <module>sentinel-example/sentinel-webflux-example</module>
         <module>sentinel-example/sentinel-spring-cloud-gateway-example</module>
         <module>sentinel-example/sentinel-zuul-example</module>

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/pom.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <parent>
+        <groupId>com.alibaba.cloud</groupId>
+        <artifactId>spring-cloud-alibaba-examples</artifactId>
+        <version>0.9.1.BUILD-SNAPSHOT</version>
+        <relativePath>../../../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+
+    <artifactId>sentinel-feign-consumer-example</artifactId>
+    <packaging>jar</packaging>
+    <description>Example demonstrating how to use sentinel with feign</description>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba.cloud</groupId>
+            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-openfeign</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba.cloud</groupId>
+            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-deploy-plugin</artifactId>
+                <version>${maven-deploy-plugin.version}</version>
+                <configuration>
+                    <skip>true</skip>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/java/com/alibaba/cloud/examples/ConsumerApplication.java

@@ -0,0 +1,20 @@
+package com.alibaba.cloud.examples;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.SpringCloudApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lengleng
+ */
+@EnableFeignClients
+@SpringCloudApplication
+public class ConsumerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ConsumerApplication.class, args);
+    }
+
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/java/com/alibaba/cloud/examples/controller/TestController.java

@@ -0,0 +1,23 @@
+package com.alibaba.cloud.examples.controller;
+
+import com.alibaba.cloud.examples.service.EchoService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lengleng
+ */
+@RestController
+public class TestController {
+
+    @Autowired
+    private EchoService echoService;
+
+    @GetMapping(value = "/echo-feign/{str}")
+    public String feign(@PathVariable String str) {
+        return echoService.echo(str);
+    }
+
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/java/com/alibaba/cloud/examples/fallback/EchoServiceFallback.java

@@ -0,0 +1,28 @@
+package com.alibaba.cloud.examples.fallback;
+
+import com.alibaba.cloud.examples.service.EchoService;
+
+/**
+ * @author lengleng
+ * @date 2019-08-01
+ * <p>
+ * sentinel 降级处理
+ */
+public class EchoServiceFallback implements EchoService {
+    private Throwable throwable;
+
+    EchoServiceFallback(Throwable throwable) {
+        this.throwable = throwable;
+    }
+
+    /**
+     * 调用服务提供方的输出接口
+     *
+     * @param str 用户输入
+     * @return
+     */
+    @Override
+    public String echo(String str) {
+        return "consumer-fallback-default-str" + throwable.getMessage();
+    }
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/java/com/alibaba/cloud/examples/fallback/EchoServiceFallbackFactory.java

@@ -0,0 +1,16 @@
+package com.alibaba.cloud.examples.fallback;
+
+import feign.hystrix.FallbackFactory;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author lengleng
+ * @date 2019-08-01
+ */
+@Component
+public class EchoServiceFallbackFactory implements FallbackFactory<EchoServiceFallback> {
+    @Override
+    public EchoServiceFallback create(Throwable throwable) {
+        return new EchoServiceFallback(throwable);
+    }
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/java/com/alibaba/cloud/examples/service/EchoService.java

@@ -0,0 +1,25 @@
+package com.alibaba.cloud.examples.service;
+
+import com.alibaba.cloud.examples.fallback.EchoServiceFallbackFactory;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+/**
+ * @author lengleng
+ * @date 2019-08-01
+ * <p>
+ * example feign client
+ */
+@FeignClient(name = "service-provider", fallbackFactory = EchoServiceFallbackFactory.class)
+public interface EchoService {
+
+    /**
+     * 调用服务提供方的输出接口
+     *
+     * @param str 用户输入
+     * @return
+     */
+    @GetMapping(value = "/echo/{str}")
+    String echo(@PathVariable("str") String str);
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-consumer-example/src/main/resources/application.yml

@@ -0,0 +1,20 @@
+server:
+  port: 18087
+
+spring:
+  application:
+    name: service-consumer
+  cloud:
+    nacos:
+      discovery:
+        server-addr: 127.0.0.1:8848
+
+feign:
+  sentinel:
+    enabled: true
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: '*'

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-provider-example/pom.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <parent>
+        <groupId>com.alibaba.cloud</groupId>
+        <artifactId>spring-cloud-alibaba-examples</artifactId>
+        <version>0.9.1.BUILD-SNAPSHOT</version>
+        <relativePath>../../../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+
+    <artifactId>sentinel-feign-provider-example</artifactId>
+    <packaging>jar</packaging>
+    <description>Example demonstrating how to use sentinel with feign</description>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba.cloud</groupId>
+            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-deploy-plugin</artifactId>
+                <version>${maven-deploy-plugin.version}</version>
+                <configuration>
+                    <skip>true</skip>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-provider-example/src/main/java/com/alibaba/cloud/examples/ProviderApplication.java

@@ -0,0 +1,17 @@
+package com.alibaba.cloud.examples;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+
+/**
+ * @author lengleng
+ */
+@EnableDiscoveryClient
+@SpringBootApplication
+public class ProviderApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ProviderApplication.class, args);
+    }
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-provider-example/src/main/java/com/alibaba/cloud/examples/controller/EchoController.java

@@ -0,0 +1,19 @@
+package com.alibaba.cloud.examples.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lengleng
+ * @date 2019-08-01
+ */
+@RestController
+public class EchoController {
+
+    @GetMapping("/echo/{str}")
+    public String echo(@PathVariable String str) {
+        return "provider-" + str;
+    }
+
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-feign-example/sentinel-feign-provider-example/src/main/resources/application.yml

@@ -0,0 +1,16 @@
+server:
+  port: 18088
+
+spring:
+  application:
+    name: service-provider
+  cloud:
+    nacos:
+      discovery:
+        server-addr: 127.0.0.1:8848
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: '*'