springcloud-alibaba使用

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Spring-Cloud-Alibaba 阿里微服务解决方案

nacos 服务注册中心

nacos-server安装配置

  • 打包编译

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    $git clone https://gitee.com/mirrors/Nacos.git
    $mvn -Prelease-nacos -Dmaven.test.skip=true clean install -U 

    // change the $version to your actual path
    $cd distribution/target/nacos-server-$version/nacos/bin

  • 数据库配置

  • 单机
    bin/startup.cmd
    $./bin/startup.sh -m standalone &

http://192.168.5.41:8848/nacos/index.html

  • 集群

  • docker

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    docker run --env MODE=standalone --name nacos -d -p 8848:8848 nacos/nacos-server

注意

  • 1.nacos-1.3.2版本配置才支持中文注解,之前版本不支持（虽然不报错，但保存不了）

服务注册

  • pom.xml

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    <?xml version="1.0" encoding="UTF-8"?>

    <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>2.1.6.RELEASE</version>
        </parent>

        <artifactId>nacos-discovery-example</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>jar</packaging>

        <properties>
            <spring-cloud-alibaba.version>0.9.0.RELEASE</spring-cloud-alibaba.version>
        </properties>

        <dependencies>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>

            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
            </dependency>

        </dependencies>

    </project>

  • application.yml

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    server:
      port: 8081
    spring:
      application:
        name: nacos-discovery-example     ## 应用名称必须唯一
      cloud:
        nacos:
          discovery:
            server-addr: 127.0.0.1:8848   ## nacos服务地址

在线配置

  • pom依赖

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    <parent>
    	<groupId>org.springframework.boot</groupId>
    	<artifactId>spring-boot-starter-parent</artifactId>
    	<version>2.1.6.RELEASE</version>
    </parent>

    <properties>
    	<spring-cloud-alibaba.version>0.9.0.RELEASE</spring-cloud-alibaba.version>
    </properties>

       <!-- nacos配置 -->
       <!-- 将服务注册到nacos -->
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
           <version>${spring-cloud-alibaba.version}</version>
       </dependency>

       <!-- 使用nacos动态配置功能 -->
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-alibaba-nacos-config</artifactId>
           <version>${spring-cloud-alibaba.version}</version>
       </dependency>

  • bootstrap.yml

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    server:
      port: 8888
    spring:
      application:
        name: web-skeleton
      cloud:
        nacos:
          discovery:
            server-addr: 127.0.0.1:8848
          config:
            server-addr: 127.0.0.1:8848
            file-extension: yml
      profiles:
        active: dev

  • nacos中配置web-skeleton-dev.yml (application.yml)

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    server:
      port: 8888
    spring:
      datasource:
        driver-class-name: oracle.jdbc.OracleDriver
        url: xx
        username: xx
        password: xx
      jackson:
        date-format: yyyy-MM-dd HH:mm:ss        # Date转String格式
        time-zone: GMT+8:00
        default-property-inclusion: non_null    # 转换对象时过滤掉null值
      mvc:
        favicon:
          enabled: false
    mybatis:
      mapper-locations: classpath:mapper/*.xml

  • 启动类

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    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

    @SpringBootApplication
    @EnableDiscoveryClient
    public class NacosProviderApplication {

        public static void main(String[] args) {
            SpringApplication.run(NacosProviderApplication.class, args);
        }

    }

Feign服务间调用

使用feign进行http调用(可以自动发现注册到nacos上的服务)

  • pom.xml依赖

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    <?xml version="1.0" encoding="UTF-8"?>
    <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>2.1.6.RELEASE</version>
        </parent>

        <artifactId>nacos-consumer</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>jar</packaging>

        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <spring-cloud-alibaba.version>0.9.0.RELEASE</spring-cloud-alibaba.version>
        </properties>

        <dependencies>
            <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.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
            </dependency>

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

        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</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>
    </project>

  • 基于feign实现的本地客户端

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    package com.lixl.nacosconsumer.client;

    import com.alibaba.fastjson.JSONObject;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestParam;

    @FeignClient("nacos-discovery-example") // 注册到nacos的服务提供方名称
    public interface UserServiceClient {

        @GetMapping("/user/{id}") //本地方法
        JSONObject getUserById(@RequestParam(value = "id") String id);

    }

  • 启动类

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    package com.lixl.nacosconsumer;

    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.client.loadbalancer.LoadBalanced;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.client.RestTemplate;

    @SpringBootApplication
    @EnableDiscoveryClient
    @EnableFeignClients
    public class NacosConsumerApplication {

        public static void main(String[] args) {
            SpringApplication.run(NacosConsumerApplication.class, args);
        }

        @LoadBalanced
        @Bean
        public RestTemplate restTemplate(){
            return new RestTemplate();
        }
    }

Sentinel 服务熔断

Dubbo RPC框架

rocketmq 消息中间件

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