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springcloud的事务怎么实现的 springcloud例子

SpringCloud調用服務示例。

SpringCloud简介:

    Spring Cloud是一系列框架的有序集合。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发,如服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等,都可以用Spring Boot的开发风格做到一键启动和部署。Spring并没有重复制造轮子,它只是将目前各家公司开发的比较成熟、经得起实际考验的服务框架组合起来,通过Spring Boot风格进行再封装屏蔽掉了复杂的配置和实现原理,最终给开发者留出了一套简单易懂、易部署和易维护的分布式系统开发工具包。

 

SpringCloud与Springboot内部以及集成好了,可以直接使用SpringBoot.

使用SpringCloud的调用需要新建三个maven项目,分别为eureka-server(服务注册中心)    server-member(服务提供方) server-order(服务消费方)

 

(1)maven项目 eureka-server ,服务注册方(类似于dubbo中使用的  zookeeper)

 项目目录结构如下: 需要编写的三个文件(EurekaApp.java    application.yml     pom.xml

 

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_spring,第1张

 

 

EurekaApp.java   SpringBoot的启动类,主要用于启动项目,读取配置文件信息

记得要添加注解  @EnableEurekaServer 

package springcloud.eureka_server.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
/**
 * springcloud的注册中心
 * @author Administrator
 * 启动后,在浏览器通过 localhost:8888访问
 */
@SpringBootApplication
@EnableEurekaServer
public class EurekaApp {
    
    public static void main(String[] args){
        SpringApplication.run(EurekaApp.class, args);
    }
}

 

application.yml  

port

defaultZone

server:
  port: 8888                   # 指定该Eureka实例的端口
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

 

pom.xml  Springboot与SpringCloud的依赖文件

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>springcloud</groupId>
    <artifactId>eureka-server</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server Maven Webapp</name>
    <url>http://maven.apache.org</url>
    
  <!-- 引入spring boot的依赖 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.3.RELEASE</version>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.7</java.version>
  </properties>

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

  <!-- 引入spring cloud的依赖 -->
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>Camden.SR4</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <!-- 添加spring-boot的maven插件 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

 

启动项目

运行EurekaApp.java ,Run as  --- >>   Java Application

启动成功后,在浏览器访问:  http://localhost:8888 

访问结果如下图所示:

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_maven_02,第2张

 

 

 

 

 

(2)maven项目server-member ,服务提供方 (类似dubbo的provider)

项目目录结构如下,需要编写的文件有四个(MemberApp.java   Member.controller.java  application.yml   pom.xml

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_springcloud的事务怎么实现的_03,第3张

 

MemberController.java  服务提供方的前端控制器类

@RestController

@RequestMapping

package springcloud.server_member.demo.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 会员服务
 * @author Administrator
 *
 */

@RestController
public class MemberController {
    
    @RequestMapping("/getMember")
    public List<String> getMember(){
        List<String> list = new ArrayList<String>();
            list.add("zhangsan");
            list.add("zhangsan1");
            list.add("zhangsan2");
            list.add("zhangsan3");
        return list;
    }
}

 

MemberApp.java  项目的SpringBoot启动类

记得使用 @EnableEurekaClient 注解   标明这是一个服务Client,需要注册在eureka上的一个服务

package springcloud.server_member.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
/**
 * 启动会员服务
 * @author Administrator
 * 
 * 服务的调用: reset  feign 
 */
@SpringBootApplication
@EnableEurekaClient
public class MemberApp {
    
    public static void main(String[] args){
        SpringApplication.run(MemberApp.class, args);
    }
}

 

application.yml   SpringCloud的配置文件

server.port  定义访问的端口

spring.application.name  定义服务名,在服务消费方通过这个服务名调用服务!(很重要哦)

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8888/eureka/
server:
  port: 8762
spring:
  application:
    name: server-member

 

pom.xml SpringCloud与SpringBoot的包依赖

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>springcloud</groupId>
    <artifactId>server-member</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>server-member Maven Webapp</name>
    <url>http://maven.apache.org</url>
    
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.7</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.objenesis</groupId>
            <artifactId>objenesis</artifactId>
            <version>1.2</version>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RC1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    
</project>

 

启动项目 (这个项目启动前需要先启动 eureka-server项目)

运行MemberApp.java ,Run as  --- >>   Java Application

启动成功后,在浏览器访问:  http://localhost:8762/getMember

访问结果如下图所示:

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_spring_04,第4张

同时再次访问服务注册中心 eureka-server项目,会出现如下结果,Instance下厨多出一行服务

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_spring_05,第5张

 

 

 

 

(3)maven项目 server-order  服务消费方(类似dubbo的customer)

项目目录结构如下: 需要编写的文件有五个(OrderController.java  OrderService.java  OrderApp.java  application.yml  pom.xml

springcloud的事务怎么实现的 springcloud例子,springcloud的事务怎么实现的 springcloud例子_maven_06,第6张

 

OrderService.java 服务消费方的业务类,在这里调用服务提供方的服务

RestTemplate 是框架中定义的rest服务调用

restTemplate.getForObject("http://server-member/getMember", List.class);  这是调用服务名为 server-member的服务中的 getMember请求对应的方法 (这里与上一个maven项目server-member项目中的配置相对应)

 

package springcloud.server_order.demo.service;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

@Service
public class OrderService {
    
    @Autowired
    private RestTemplate restTemplate;
    
    /**
     * http: 这里是写member-server里面的访问路径。 getMember是访问方法 
     * @return
     */
    public List<String> getAllUser(){
        return restTemplate.getForObject("http://server-member/getMember", List.class);
    }

}

 

OrderController.java   服务消费者的前端控制类

使用@Autowired注解 注入业务层对象,调用业务层方法

package springcloud.server_order.demo.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import springcloud.server_order.demo.service.OrderService;

@RestController
public class OrderController {

    @Autowired
    private OrderService orderService;
    
    @RequestMapping("/getOrderUser")
    public List<String> getAllUser(){
        System.out.println("订单服务正在测试会议服务");
        return orderService.getAllUser();
    }
}

 

OrderApp.java  项目的SpringBoot启动类

@EnableEurekaClient

@LoadBalanced 标识服务的调用,需要用到负载均衡

package springcloud.server_order.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@EnableEurekaClient
public class OrderApp {

    public static void main(String[] args){
        SpringApplication.run(OrderApp.class, args);
    }
    
    /**
     * 表示支持负载均衡
     * @return
     */
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }

}

 

application.yml  Springcloud的配置文件

eureka.client.serviceUrl.defaultZone   注册中心的地址

server.port  访问服务的端口

spring.application.name 服务名称

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8888/eureka/
server:
  port: 8764
spring:
  application:
    name: server-order

 

pom.xml 

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>springcloud</groupId>
    <artifactId>server-order</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>server-order Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.objenesis</groupId>
            <artifactId>objenesis</artifactId>
            <version>1.2</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RC1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

 

启动项目(启动这个项目之前需要先启动 eureka-server    server-member)

运行OrderApp.java ,Run as  --- >>   Java Application

启动成功后,在浏览器访问:  http://localhost:8764/getOrderUser

访问结果如下图所示:

 


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