修改eureka-consumer-feign-hystrix，实现hystrix功能

Author: zkzong

2-Dalston版教程示例/eureka-consumer-feign-hystrix/pom.xml

@@ -32,6 +32,10 @@
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-feign</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-hystrix</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>

2-Dalston版教程示例/eureka-consumer-feign-hystrix/src/main/java/com/didispace/DcClient.java

@@ -8,7 +8,7 @@
  * @create 2017/6/24.
  * @blog http://blog.didispace.com
  */
-@FeignClient("eureka-client")
+@FeignClient(name = "eureka-client", fallback = DcClientFallback.class)
 public interface DcClient {
 
     @GetMapping("/dc")

2-Dalston版教程示例/eureka-consumer-feign-hystrix/src/main/java/com/didispace/DcClientFallback.java

@@ -0,0 +1,17 @@
+package com.didispace;
+
+import org.springframework.stereotype.Component;
+
+/**
+ * @author 翟永超
+ * @create 2017/6/24.
+ * @blog http://blog.didispace.com
+ */
+@Component
+public class DcClientFallback implements DcClient {
+
+    @Override
+    public String consumer() {
+        return "fallback";
+    }
+}

2-Dalston版教程示例/eureka-consumer-feign-hystrix/src/main/resources/application.properties

@@ -3,4 +3,6 @@ server.port=2101
 
 eureka.client.serviceUrl.defaultZone=http://localhost:1001/eureka/
 
+feign.hystrix.enabled=true
+
 logging.file=${spring.application.name}.log