Spring Cloud config中，使用數據庫存儲配置信息

時間  2019-12-08
標籤 spring cloud config 使用 數據庫 存儲 配置 信息 欄目 Spring 简体版
原文   原文鏈接

主要內容

  1. 在springcloud config中，使用數據庫存儲配置信息。java

    系統默認採用git的方式，此處咱們介紹使用jdbc的方式存儲配置信息mysql

準備數據庫

  1. 數據庫咱們使用mysql。
  2. 新建庫 p-config-server

  3. 建立配置須要的表，並初始化一些配置信息git

    CREATE TABLE `properties` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `application` varchar(64) COLLATE utf8_bin NOT NULL DEFAULT '',
  `profile` varchar(64) COLLATE utf8_bin NOT NULL DEFAULT '',
  `label` varchar(64) COLLATE utf8_bin NOT NULL DEFAULT '',
  `key` varchar(128) COLLATE utf8_bin NOT NULL DEFAULT '',
  `value` varchar(4096) COLLATE utf8_bin NOT NULL DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

INSERT INTO `properties` VALUES ('1', 'p-config-client', 'dev', 'master', 'key-1', 'value-1');
INSERT INTO `properties` VALUES ('2', 'p-config-client', 'dev', 'master', 'key-2', 'value-2');
INSERT INTO `properties` VALUES ('3', 'p-config-client', 'dev1', 'master', 'key-1', 'value-3');
INSERT INTO `properties` VALUES ('4', 'p-config-client', 'dev1', 'master', 'key-4', 'value-4');
INSERT INTO `properties` VALUES ('5', 'p-config-client', 'dev1', 'master', 'key-5', 'value-5');

建立eureka註冊中心

  1. 建立springcloud項目p-eurekaweb

    groupId: com.ms
artifactId: p-eureka

    在這裏插入圖片描述

  2. pom.xml內容spring

    <?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>2.1.4.RELEASE</version>
     <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>com.ms</groupId>
 <artifactId>p-eureka</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>p-eureka</name>
 <description>Demo project for Spring Boot</description>

 <properties>
     <java.version>1.8</java.version>
     <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
 </properties>

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

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

  3. application.properties改成application.ymlsql

    server:
  port: 7001
spring:
  application:
    name: p-eureka
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://localhost:7001/eureka/

  4. PEurekaApplication內容數據庫

    package com.ms;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class PEurekaApplication {

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

}

    注意：apache

    • @EnableEurekaServer：表示這是一個eureka註冊中心

  5. 運行PEurekaApplicationbootstrap

  6. 訪問http://localhost:7001/微信

    在這裏插入圖片描述

    建立配置中心(config server)

  7. 建立springcloud項目p-config-server

    groupId: com.ms
artifactId: p-config-server

    在這裏插入圖片描述

  8. pom.xml內容

    <?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>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ms</groupId>
    <artifactId>p-config-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>p-config-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </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>

  9. application.yml 內容

    server:
  port: 8080
eureka:
  client:
    service-url:
      defaultZone: http://localhost:7001/eureka/
spring:
  application:
    name: p-config-server
  cloud:
    config:
      enabled: true
      profile: jdbc
      server:
        jdbc:
          sql: SELECT `key`, `value` from PROPERTIES where application=? and profile=? and label=?
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/config-server?characterEncoding=UTF-8
    username: root
    password: root123
    type: com.zaxxer.hikari.HikariDataSource
  profiles:
    active: jdbc

    注意：

    • 數據鏈接地址、用戶名、密碼，這些值根據本身的機器進行修改

  10. PConfigServerApplication內容

    package com.ms;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableConfigServer
@EnableEurekaClient
public class PConfigServerApplication {

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

}

    注意：

    • @EnableConfigServer：表示這是一個註冊中心應用
    • @EnableEurekaClient：將當前服務註冊到eureka中，能夠被其餘應用發現，而後使用

  11. 運行PConfigServerApplication

  12. 訪問：http://localhost:8080/master/p-config-client-dev,dev1.yml 結果以下：

    key-1: value-3
key-2: value-2
key-4: value-4
key-5: value-5

建立客戶端

  1. 建立springcloud項目p-config-client

    groupId: com.ms
artifactId: p-config-client

    在這裏插入圖片描述

  2. pom.xml內容

    <?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>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ms</groupId>
    <artifactId>p-config-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>p-config-client</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.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-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </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>

  3. application.properties改成bootstrap.yml 內容

    注意：此處必須使用bootstrap名稱

    server:
  port: 8081
spring:
  application:
    name: p-config-client
  cloud:
    config:
      discovery:
        enabled: true
        service-id: p-config-server
      name: ${spring.application.name}
      profile: dev,dev1
      label: master
      override-system-properties: false
eureka:
  client:
    service-url:
      defaultZone: http://localhost:7001/eureka/

    • config.name對應數據庫properties表中的application字段

    • config.profile對應表中的profile字段，config.profile若是包含多個值，之間用英文逗號隔開

    • config.label對應表中的label字段，咱們能夠使用label來區分環境(dev【開發環境】、test【測試環境】、prod【線上環境】)

  4. PConfigClientApplication內容

    package com.ms;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
public class PConfigClientApplication {

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

}

    注意：

    • @EnableEurekaClient：當前應用會訪問eureka註冊中心，發現config service

  5. 建立DemoController

    package com.ms;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
@Slf4j
public class DemoController {

    @Autowired
    private Environment environment;

    @RequestMapping("/{key}")
    public String index(@PathVariable("key") String key) {
        return this.environment.getProperty(key);
    }
}

  6. 運行PConfigClientApplication

  7. 訪問 http://localhost:8081/key-1 結果以下：

    value-3

總結

  1. 使用數據庫存儲配置信息仍是比較靠譜的，相對於git來講會更好一些
  2. 代碼已上傳至git，獲取源碼方式：微信公衆號javacode2018，發送：sccj
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