springboot2.0从apollo读取配置

参考：https://github.com/nobodyiam/apollo-build-scripts

本篇文章包括两点：Windows环境下apollo单机搭建、springboot2.0从apollo读取配置

一、windows环境下aollo单机搭建

1、环境：JDK1.8，mysql 5.7.23，git-2.1.9（执行apollo的启动脚本）

2、下载apollo安装包

3、解压之后，将 apollo-build-scripts-master\sql下的两个sql文本导入mysql中

source   apolloconfigdb.sql的目录；

source   apolloportald.sql的目录；

执行成功之后可以看到，红框这两个database

4、修改demo.sh的内容

修改mysql的url，username，password

之后在git base中执行demo.sh

启动：./demo.sh  start  

停止：./demo.sh stop

5、成功启动apollo服务端和客户端之后，打开浏览器输入http://localhost:8070/

用户名：apollo 

密码：admin

接下来就可以创建自己的项目了

6、apollo成功启动之后，在本地仓库就可以看到下面三个jar，springboot2.0读取apollo使用的就是apollo-client

7、搭建过程可能出现很多问题，查看红框中两个文件夹下的日志

8、切记mysql服务要启动，8080、8070、8090这三个端口不要被占用，也不要随意改动这三个端口

我出现这个异常是因为把（config_server_url=http://localhost:8080）的端口改成8801了，导致registered-replicas和unavailable-replicas  url的端口为8801了，启动成功了，但是配置中心页面一直提示：系统出错，请重试或联系系统负责人

com.ctrip.framework.apollo.common.exception.ServiceException: No available admin server. Maybe because of meta server down or all admin server down. Meta server address: http://localhost:8080
	at com.ctrip.framework.apollo.portal.component.RetryableRestTemplate.getAdminServices(RetryableRestTemplate.java:172)
	at com.ctrip.framework.apollo.portal.component.RetryableRestTemplate.execute(RetryableRestTemplate.java:90)
	at com.ctrip.framework.apollo.portal.component.RetryableRestTemplate.get(RetryableRestTemplate.java:56)
	at com.ctrip.framework.apollo.portal.api.AdminServiceAPI$HealthAPI.health(AdminServiceAPI.java:43)
	at com.ctrip.framework.apollo.portal.component.PortalSettings$HealthCheckTask.isUp(PortalSettings.java:127)
	at com.ctrip.framework.apollo.portal.component.PortalSettings$HealthCheckTask.run(PortalSettings.java:103)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

9、github上单机搭建文档非常给力了，出现问题，慢慢采坑！！！

二、springboot2.0项目读取apollo配置中心的配置

1、pom.xml 引入apollo-client  jar包，注意这里jar包，单机搭建apollo成功之后就在自己本地库install了，要和自己的apollo版本一致

<dependency>
			<groupId>com.ctrip.framework.apollo</groupId>
			<artifactId>apollo-client</artifactId>
			<version>0.8.0</version>
		</dependency>

2、这里创建了一个项目，app.id = wangwangdev，应用名随便起（还是专业一点吧），部门可以自己修改，开始只有样例1，样例2,在apolloportaldb.serverconfig,修改字段值，其它的管理员都可以修改！

3、ApollaDemoApplication

package com.dl.cn;

import com.ctrip.framework.apollo.spring.annotation.EnableApolloConfig;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
/**
 * 在微服务应用启动中使用apollo配置中心获取配置信息
 * */
@EnableApolloConfig
public class ApollaDemoApplication {

	static {
		System.setProperty("-Dapp.id","wangwangdev");
		System.setProperty("-Denv","dev");
		System.setProperty("-Ddev_meta","http://127.0.0.1:8080");
	}

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

}

4、ApolloDemoController

package com.dl.cn;

import com.ctrip.framework.apollo.Config;
import com.ctrip.framework.apollo.spring.annotation.ApolloConfig;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Properties;
import java.util.Set;

/**
 * Created by Tiger 2018/10/10.
 */
@RestController
@RequestMapping("/apollo")
public class ApolloDemoController {

    /**
     * 从apollo获取配置信息
     * */
    @ApolloConfig
    private Config config;

    @GetMapping("/read_demo")
    public Properties apolloReadDemo(){
        /**
         * 得到当前app.id中的配置
         * */
        Set<String> set = config.getPropertyNames();
        for(String key : set){
            PropertiesUtils.properties.setProperty(key,config.getProperty(key,null));
        }
        for(String key : PropertiesUtils.properties.stringPropertyNames()){
            System.out.println(key+">>>"+PropertiesUtils.properties.getProperty(key));
        }
        return PropertiesUtils.properties;
    }
}

5、application.properties，把server.port 改成非8080，默认是8080

server.port=8000

6、PropertiesUtils

package com.dl.cn;

import com.ctrip.framework.apollo.Config;
import com.ctrip.framework.apollo.ConfigService;

import java.util.Properties;

/**
 * Created by Tiger on 2018/10/10.
 * 读取公共apollo配置
 */
public class PropertiesUtils {
    private static final String COMMON = "nova1.NovaCommon";
    public static Properties properties = new Properties();
    static {
        Config commonConfig = ConfigService.getConfig(COMMON);
        if(commonConfig != null){
            for(String key : commonConfig.getPropertyNames()){
                properties.setProperty(key,commonConfig.getProperty(key,null));
            }
        }
    }
}

7、测试结果

127.0.0.1:8000/apollo/read_demo

{
    "commonKey2": "commonValue2",
    "commonKey1": "commonValue1",
    "email": "Tianyu@163.com",
    "userName": "Tianyu",
    "commonKey3": "commonValue3"
}

2018-10-11 10:32:57.432  INFO 36468 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2018-10-11 10:32:57.455  INFO 36468 --- [nio-8000-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 23 ms
commonKey2>>>commonValue2
commonKey1>>>commonValue1
email>>>Tianyu@163.com
userName>>>Tianyu
commonKey3>>>commonValue3