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# Spring Cloud Alibaba Scheduling Example
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## 项目说明
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Spring Cloud Alibaba Scheduling 提供了基于 Spring Scheduling 的定时任务调度能力，支持分布式场景下的定时任务调度，为分布式场景下的定时任务调度服务提供快速接入方案。
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目前提供基于开源shedlock分布式抢锁模式，以及阿里云上SchedulerX服务的 [快速接入](https://sca.aliyun.com/docs/2023/user-guide/schedulerx/quick-start/) ，后续将提供更多实现的开源方案接入。
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## 应用依赖
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### 接入 `spring-cloud-starter-alibaba-schedulerx`
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在项目 pom.xml 中加入以下依赖：
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```xml
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<dependency>
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<groupId>com.alibaba.cloud</groupId>
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<artifactId>spring-cloud-starter-alibaba-schedulerx</artifactId>
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</dependency>
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```
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## 配置说明
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在Example工程中提供shedlock和schedulerx的两种接入配置模式（***二选一***），在`application.yaml`中选择需要的接入模式配置文件，案例中默认采用开源的shedlock方案。
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### 方案一、分布式shedlock接入配置说明
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在 application-schedulerx.yml 配置文件中修改以下配置：
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```yaml
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spring:
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cloud:
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scheduling:
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# Distributed mode: shedlock, schedulerx
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# Set config value: shedlock
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distributed-mode: shedlock
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datasource:
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driver-class: com.mysql.cj.jdbc.Driver
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url: {jdbc_url}
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username: {jdbc.username}
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password: {jdbc.password}
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```
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使用时请需要替换`{jdbc_url}`、`{jdbc.username}`、`{jdbc.password}`为实际自有的数据库连接信息。
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>️ 注意：如未创建数据库，请先手动创建数据实例。
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### 方案二、云产品SchedulerX接入配置说明
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在 application-schedulerx.yml 配置文件中修改以下配置：
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```yaml
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spring:
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cloud:
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scheduling:
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# Distributed mode: shedlock, schedulerx
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# Set config value: schedulerx
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distributed-mode: schedulerx
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schedulerx:
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# This configuration is required, Please get it from aliyun schedulerx console
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endpoint: acm.aliyun.com
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namespace: aad167f6-xxxx-xxxx-xxxx-xxxxxxxxx
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groupId: xxxxx
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appKey: PZm1XXXXXXXXXXXX
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# Optional config, if you need to sync task to schedulerx
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# task-sync: true
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# region-id: public
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# aliyun-access-key: XXXXXXXXXXXX
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# aliyun-secret-key: XXXXXXXXXXXX
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# task-model-default: standalone
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```
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阿里云上产品每个用户开通后都会有免费额度，详细云上产品接入配置使用说明，请参考：[阿里云SchedulerX Spring定时任务](https://help.aliyun.com/zh/schedulerx/user-guide/spring-jobs)
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## 启动应用
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在完成上述接入选择和配置后，直接运行Example中的 `ScheduleApplication`类即可启动运行。本案例工程中的`SimpleJob`类包含了两个每分钟执行一次的Spring定时任务，启动后可得到如下日志：
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```text
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2024-05-17T11:20:59.981+08:00 INFO 66613 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-4] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-17 11:20:59 do job1...
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2024-05-17T11:20:59.985+08:00 INFO 66613 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-1] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-17 11:20:59 do job2...
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```
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### 分布式运行验证
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在IDEA环境中创建两个应用启动项，各自分别配置启动参数`--server.port={应用端口}`，启动相应的应用进程。案例工程默认采用`shedlock`，
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我们可以直接看到`job1`两个应用都会同时触发，而`job2`添加了`@SchedulerLock`注解则会同一时间点只会在一个应用进程中执行。
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- ScheduleApplication-1，启动参数：`--server.port=18080`，定时任务运行日志如下：
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```text
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2024-05-20T14:02:00.003+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-4] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:02:00 do job1...
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2024-05-20T14:03:00.008+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-4] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:03:00 do job1...
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2024-05-20T14:03:00.008+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-1] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:03:00 do job2...
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2024-05-20T14:04:00.006+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-3] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:04:00 do job1...
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2024-05-20T14:04:00.010+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-2] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:04:00 do job2...
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2024-05-20T14:05:00.003+08:00 INFO 80520 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-5] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:05:00 do job1...
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```
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- ScheduleApplication-2，启动参数：`--server.port=18081`，定时任务运行日志如下：
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```text
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2024-05-20T14:02:00.003+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-4] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:02:00 do job1...
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2024-05-20T14:02:00.008+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-3] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:02:00 do job2...
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2024-05-20T14:03:00.004+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-5] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:03:00 do job1...
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2024-05-20T14:04:00.006+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-3] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:04:00 do job1...
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2024-05-20T14:05:00.004+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-2] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:05:00 do job1...
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2024-05-20T14:05:00.007+08:00 INFO 80596 --- [spring-cloud-alibaba-schedule-example] [ sca-schedule-4] c.a.c.examples.schedule.job.SimpleJob : time=2024-05-20 14:05:00 do job2...
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```
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