分布式任务调度的解决方案

#下载源码
cd /root/
wget https://github.com/xuxueli/xxl-job/archive/v2.0.1.zip
unzip v2.0.1.zip
mv xxl-job-2.0.1 xxl-job

#修改配置文件
vim /root/xxl-job/xxl-job-admin/src/main/resources/application.properties
## 修改mysql、邮件等配置

#编译
cd /root/xxl-job
mvn clean package

# 创建部署目录
mkdir -p /xxl-job
cd /root/xxl-job/xxl-job-admin/target/
cp /root/xxl-job/xxl-job-admin/target/xxl-job-admin-2.0.1.jar /xxl-job/xxl-job-admin-2.0.1.jar


#mysql 数据初始化（用户名和密码为root，数据库编码推荐使用utf8mb4）
mysql -u root -proot -e "source /root/xxl-job/doc/db/tables_xxl_job.sql;"

#启动
nohup java -jar /xxl-job/xxl-job-admin-2.0.1.jar > /dev/null >& 1 &

#检查 admin 123456
curl http://localhost:8080/xxl-job-admin

@Configuration
public class XxlJobConfig {
    @Value("${spring.application.name:}")
    private String springAppName;

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

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

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

    @Value("${xxl.job.executor.port:9999}")
    private int port;

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

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

    @Value("${xxl.job.executor.logretentiondays:7}")
    private int logRetentionDays;

    @Bean
    public XxlJobSpringExecutor xxlJobExecutor() {
        XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();
        xxlJobSpringExecutor.setAdminAddresses(adminAddresses);
        if (StringUtils.isEmpty(appName)) {
            if (StringUtils.isEmpty(springAppName)) {
                throw new IllegalStateException("missing xxl-job appname config");
            }
            appName = springAppName;
        }
        xxlJobSpringExecutor.setAppName(appName);
        xxlJobSpringExecutor.setIp(ip);
        xxlJobSpringExecutor.setPort(port);
        xxlJobSpringExecutor.setAccessToken(accessToken);
        xxlJobSpringExecutor.setLogPath(logPath);
        xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays);

        return xxlJobSpringExecutor;
    }
}

@Component
public class SampleXxlJob {
    private static Logger logger = LoggerFactory.getLogger(SampleXxlJob.class);

    /**
     * 1、简单任务示例（Bean模式）
     */
    @XxlJob("demoJobHandler")
    public ReturnT<String> demoJobHandler(String param) throws Exception {
        XxlJobLogger.log("XXL-JOB, Hello World.");
        for (int i = 0; i < 5; i++) {
            XxlJobLogger.log("beat at:" + i);
            TimeUnit.SECONDS.sleep(2);
        }
        return ReturnT.SUCCESS;
    }

    /**
     * 2、分片广播任务
     */
    @XxlJob("shardingJobHandler")
    public ReturnT<String> shardingJobHandler(String param) throws Exception {
        // 分片参数
        ShardingUtil.ShardingVO shardingVO = ShardingUtil.getShardingVo();
        XxlJobLogger.log("分片参数：当前分片序号 = {}, 总分片数 = {}", shardingVO.getIndex(), shardingVO.getTotal());
        // 业务逻辑
        for (int i = 0; i < shardingVO.getTotal(); i++) {
            if (i == shardingVO.getIndex()) {
                XxlJobLogger.log("第 {} 片, 命中分片开始处理", i);
            } else {
                XxlJobLogger.log("第 {} 片, 忽略", i);
            }
        }
        return ReturnT.SUCCESS;
    }
}

基于@JobHandler代码方式

@JobHandler(value="demoJobHandler")
@Component
public class DemoJobHandler extends IJobHandler {
	@Override
	public ReturnT<String> execute(String param) throws Exception {
		XxlJobLogger.log("XXL-JOB, Hello World.");
		for (int i = 0; i < 5; i++) {
			XxlJobLogger.log("beat at:" + i);
			TimeUnit.SECONDS.sleep(2);
		}
		return SUCCESS;
	}
}