SpringCloud-Zuul服务网关[容错Hystrix]

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.13.RELEASE</version>
	</parent>
	<groupId>com.bobo</groupId>
	<artifactId>zuul-gateway-fallback</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Dalston.SR5</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zuul</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

spring.application.name=zuul-gateway-fallback
server.port=9030
#\u8BBE\u7F6E\u670D\u52A1\u6CE8\u518C\u4E2D\u5FC3\u5730\u5740\uFF0C\u6307\u5411\u53E6\u4E00\u4E2A\u6CE8\u518C\u4E2D\u5FC3
eureka.client.serviceUrl.defaultZone=http://dpb:123456@eureka1:8761/eureka/,http://dpb:123456@eureka2:8761/eureka/

package com.bobo.zuul.fallback;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

import org.springframework.cloud.netflix.zuul.filters.route.ZuulFallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;

/**
 * 商品服务的服务降级的工具类
 * 
 * @author dengp
 *
 */
@Component
public class ProviderProductFallback implements ZuulFallbackProvider {

	@Override
	public ClientHttpResponse fallbackResponse() {
		// 设置降级后给客户端响应的信息
		return new ClientHttpResponse() {
			
			/**
			 * 设置相关的header信息
			 */
			@Override
			public HttpHeaders getHeaders() {
				HttpHeaders header = new HttpHeaders();
				// 返回json数据
				MediaType mt = new MediaType("application","json",Charset.forName("utf-8"));
				header.setContentType(mt);
				return header;
			}
			/**
			 * 设置响应的内容
			 */
			@Override
			public InputStream getBody() throws IOException {
				
				return new ByteArrayInputStream("product服务不可用，请于管理员联系!".getBytes());
			}
			
			/**
			 * 返回状态码
			 */
			@Override
			public String getStatusText() throws IOException {
				// TODO Auto-generated method stub
				return this.getStatusCode().getReasonPhrase();
			}
			
			@Override
			public HttpStatus getStatusCode() throws IOException {
				// TODO Auto-generated method stub
				return HttpStatus.OK;
			}
			
			@Override
			public int getRawStatusCode() throws IOException {
				// TODO Auto-generated method stub
				return this.getStatusCode().value();
			}
			
			@Override
			public void close() {
				
			}
		};
	}

	/**
	 * 对哪个服务做降级处理
	 */
	@Override
	public String getRoute() {

		return "e-book-product";
	}

}