SpringCloud Zuul 由Edgware升级到最新版本Finchley改动点

Spring Boot 2.1.0 已经发布，现在 Spring Cloud 格林威治版本也发布了，现在为项目网关zuul做一次整体框架升级到最新稳定版基于Spring Boot 2.0.x 的 Finchley 版本。

升级前 => 升级后

Spring Boot 1.5.14 => Spring Boot 2.0.7

Spring Cloud Edgware SR4 => Spring Cloud Finchley. SR2

1.pom文件依赖变更:

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.SR2</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.0.7.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

2.注册中心Eureka client客户端依赖更新

升级前：

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>

升级后：

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
   </dependency>

   <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
   </dependency>

3.注册中心里面的客户端实例IP显示不正确,

启动出现异常2019-01-17 09:22:22 353 com.netflix.discovery.DiscoveryClient | DiscoveryClient_ZUUL/xx-PC.xxcom:${spring.cloud.client.ipAddress}:7093 - was unable to refresh its cache! status = Retry limit reached; giving up on completing the request.

因为 Spring Cloud 获取服务客户端 IP 地址配置变更了。

升级前：

${spring.cloud.client.ipAddress}

升级后：

${spring.cloud.client.ip-address}

4.zuul依赖变更

升级前：

<dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-zuul</artifactId>
   </dependency>

升级后：

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>

5.feign依赖变更

升级后：

<dependency>
<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

6.熔断器方法变更

升级前：
@Component
public class HttpFallbackProvider implements FallbackProvider{
public ClientHttpResponse fallbackResponse(Throwable cause) {
}
}

升级后：

@Component
public class HttpFallbackProvider implements FallbackProvider{
public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
}
}

6.异常处理方面的变更

升级前：
import org.springframework.boot.autoconfigure.web.DefaultErrorAttributes;
import org.springframework.web.context.request.RequestAttributes;
@Component
public class ZuulErrorAttribute extends DefaultErrorAttributes{
@Override
public Map<String, Object> getErrorAttributes(RequestAttributes requestAttributes, boolean includeStackTrace) {
Map<String, Object> result = super.getErrorAttributes(requestAttributes, includeStackTrace);
log.error("--ZuulErrorAttribute--result:{}",result);
}
}
升级后：
RequestAttributes 变更为WebRequest，DefaultErrorAttributes引入变更。

import org.springframework.boot.web.servlet.error.DefaultErrorAttributes;
import org.springframework.web.context.request.WebRequest;
@Component
public class ZuulErrorAttribute extends DefaultErrorAttributes{
   public Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
   Map<String, Object> result = super.getErrorAttributes(webRequest, includeStackTrace);
   log.error("--ZuulErrorAttribute--result:{}",result);
   }
}

SpringCloud Zuul 由Edgware升级到最新版本Finchley改动点

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