From da1bdf90bfa524408821adb0d91447c0dd7663cd Mon Sep 17 00:00:00 2001
From: Christian Raedel <ducks.2788@gmail.com>
Date: Mon, 22 Aug 2016 19:57:11 +0200
Subject: [PATCH] Added Feign Client

---
 spring-cloud-hystrix/pom.xml                  |  1 +
 .../pom.xml                                   | 82 +++++++++++++++++++
 .../hystrix/rest/consumer/GreetingClient.java | 21 +++++
 .../RestConsumerFeignApplication.java         | 32 ++++++++
 .../resources/templates/greeting-view.html    |  9 ++
 5 files changed, 145 insertions(+)
 create mode 100644 spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/pom.xml
 create mode 100644 spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/GreetingClient.java
 create mode 100644 spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/RestConsumerFeignApplication.java
 create mode 100644 spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/resources/templates/greeting-view.html

diff --git a/spring-cloud-hystrix/pom.xml b/spring-cloud-hystrix/pom.xml
index f7394d729e..2768a4f05b 100644
--- a/spring-cloud-hystrix/pom.xml
+++ b/spring-cloud-hystrix/pom.xml
@@ -9,6 +9,7 @@
     <modules>
         <module>spring-cloud-hystrix-rest-producer</module>
         <module>spring-cloud-hystrix-rest-consumer</module>
+        <module>spring-cloud-hystrix-feign-rest-consumer</module>
     </modules>
     <packaging>pom</packaging>
 
diff --git a/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/pom.xml b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/pom.xml
new file mode 100644
index 0000000000..d2716e897e
--- /dev/null
+++ b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/pom.xml
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>spring-cloud-hystrix-feign-rest-consumer</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>Spring Cloud Hystrix Feign REST Consumer</name>
+    <description>Spring Cloud Hystrix Feign Sample Implementation</description>
+
+    <parent>
+        <groupId>com.baeldung.spring.cloud</groupId>
+        <artifactId>spring-cloud-hystrix</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung.spring.cloud</groupId>
+            <artifactId>spring-cloud-hystrix-rest-producer</artifactId>
+            <version>1.0.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-hystrix</artifactId>
+            <version>1.1.5.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
+            <version>1.1.5.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-feign</artifactId>
+            <version>1.1.5.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+            <version>1.4.0.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+            <version>1.4.0.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+            <version>1.4.0.RELEASE</version>
+        </dependency>
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-starter-parent</artifactId>
+                <version>Brixton.SR4</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/GreetingClient.java b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/GreetingClient.java
new file mode 100644
index 0000000000..e152b8233f
--- /dev/null
+++ b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/GreetingClient.java
@@ -0,0 +1,21 @@
+package com.baeldung.spring.cloud.hystrix.rest.consumer;
+
+import com.baeldung.spring.cloud.hystrix.rest.producer.GreetingController;
+import org.springframework.cloud.netflix.feign.FeignClient;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.PathVariable;
+
+@FeignClient(
+        name = "rest-producer",
+        url = "http://localhost:9090/greeting/{username}",
+        fallback = GreetingClient.GreetingClientFallback.class
+)
+public interface GreetingClient extends GreetingController {
+    @Component
+    public static class GreetingClientFallback implements GreetingClient {
+        @Override
+        public String greeting(@PathVariable("username") String username) {
+            return "Hello User!";
+        }
+    }
+}
diff --git a/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/RestConsumerFeignApplication.java b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/RestConsumerFeignApplication.java
new file mode 100644
index 0000000000..b97d84eaf2
--- /dev/null
+++ b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/java/com/baeldung/spring/cloud/hystrix/rest/consumer/RestConsumerFeignApplication.java
@@ -0,0 +1,32 @@
+package com.baeldung.spring.cloud.hystrix.rest.consumer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
+import org.springframework.cloud.netflix.feign.EnableFeignClients;
+import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@SpringBootApplication
+@EnableCircuitBreaker
+@EnableHystrixDashboard
+@EnableFeignClients
+@Controller
+public class RestConsumerFeignApplication {
+    @Autowired
+    private GreetingClient greetingClient;
+
+    public static void main(String[] args) {
+        SpringApplication.run(RestConsumerFeignApplication.class, args);
+    }
+
+    @RequestMapping("/get-greeting/{username}")
+    public String getGreeting(Model model, @PathVariable("username") String username) {
+        model.addAttribute("greeting", greetingClient.greeting(username));
+        return "greeting-view";
+    }
+}
diff --git a/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/resources/templates/greeting-view.html b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/resources/templates/greeting-view.html
new file mode 100644
index 0000000000..6cb70edf2d
--- /dev/null
+++ b/spring-cloud-hystrix/spring-cloud-hystrix-feign-rest-consumer/src/main/resources/templates/greeting-view.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+    <head>
+        <title>Greetings from Hystrix</title>
+    </head>
+    <body>
+        <h2 th:text="${greeting}"/>
+    </body>
+</html>
\ No newline at end of file