分布式定时任务系列2：XXL-job使用

在前面一节已经跑起来了XXL-job：分布式定时任务系列1：XXL-job安装，里面是通过编译源码，本地启动的。也可以编译打成jar包放到服务器上面进行访问，这里就不赘述了

那么xxl-job具体怎么使用呢？主要是2部分：job任务配置&job任务开发

安装好xxl-job之后，一般会默认生成一个执行器：

对它进行编辑一下，可以看到详细信息

进入控制台，在任务管理菜单下面新增一条任务，并设置cron表达式

点击添加之后，会生成一条新的任务，此时任务状态是"stop"，先不启动它

仓库地址：Central Repository: com/xuxueli/xxl-job-core/2.3.0

			com.xuxueli
			xxl-job-core
			2.3.0
		

@Component
public class JobHandler {

    @XxlJob("first_job")
    public void firstJob() {
        System.out.println("========================= first job========================= ");
    }
}

package com.mo.shu.job;

import com.xxl.job.core.executor.impl.XxlJobSpringExecutor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Configuration
public class XxlJobConfig {
    private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);

    @Value("${xxl.job.admin.addresses}")
    private String adminAddresses;

    @Value("${xxl.job.accessToken}")
    private String accessToken;

    @Value("${xxl.job.executor.appname}")
    private String appname;

    @Value("${xxl.job.executor.address}")
    private String address;

    @Value("${xxl.job.executor.ip}")
    private String ip;

    @Value("${xxl.job.executor.port}")
    private int port;

    @Value("${xxl.job.executor.logpath}")
    private String logPath;

    @Value("${xxl.job.executor.logretentiondays}")
    private int logRetentionDays;


    @Bean
    public XxlJobSpringExecutor xxlJobExecutor() {
        logger.info(">>>>>>>>>>> xxl-job config init.");
        XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();
        xxlJobSpringExecutor.setAdminAddresses(adminAddresses);
        xxlJobSpringExecutor.setAppname(appname);
        xxlJobSpringExecutor.setAddress(address);
        xxlJobSpringExecutor.setIp(ip);
        xxlJobSpringExecutor.setPort(port);
        xxlJobSpringExecutor.setAccessToken(accessToken);
        xxlJobSpringExecutor.setLogPath(logPath);
        xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays);

        return xxlJobSpringExecutor;
    }

    


}

在配置文件中application.properties增加配置 

### xxl-job admin address list, such as "http://address" or "http://address01,http://address02"
xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin

### xxl-job, access token
xxl.job.accessToken=

### xxl-job executor appname
xxl.job.executor.appname=xxl-job-executor-sample
### xxl-job executor registry-address: default use address to registry , otherwise use ip:port if address is null
xxl.job.executor.address=
### xxl-job executor server-info
xxl.job.executor.ip=
xxl.job.executor.port=9999
### xxl-job executor log-path
xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler
### xxl-job executor log-retention-days
xxl.job.executor.logretentiondays=30

若以上配置成功，则可以在控制台看到注册的客户端机器

经过以上设置，在平台手动触发一次任务，并且可以查看执行日志

更多参考：https://www.xuxueli.com/xxl-job/#2.5%20%E5%BC%80%E5%8F%91%E7%AC%AC%E4%B8%80%E4%B8%AA%E4%BB%BB%E5%8A%A1%E2%80%9CHello%20World%E2%80%9D