Spring 實(shí)現(xiàn) SchedulingConfigurer 接口完成動(dòng)態(tài)定時(shí)任務(wù)（配合數(shù)據(jù)庫動(dòng)態(tài)執(zhí)行）
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.util.StringUtils;
import java.time.LocalDateTime;
@Configuration
@EnableScheduling
public class CompleteScheduleConfig implements SchedulingConfigurer {
@Mapper
public interface CronMapper {
@Select("select cron from cron limit 1")
String getCron();
}
@Autowired
@SuppressWarnings("all")
CronMapper cronMapper;
/**
* 執(zhí)行定時(shí)任務(wù).
*/
@Override
public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
taskRegistrar.addTriggerTask(
//1.添加任務(wù)內(nèi)容(Runnable)
() -> System.out.println("執(zhí)行定時(shí)任務(wù)2: " + LocalDateTime.now().toLocalTime()),
//2.設(shè)置執(zhí)行周期(Trigger)
triggerContext -> {
//2.1 從數(shù)據(jù)庫獲取執(zhí)行周期
String cron = cronMapper.getCron();
//2.2 合法性校驗(yàn).
if (StringUtils.isEmpty(cron)) {
// Omitted Code ..
}
//2.3 返回執(zhí)行周期(Date)
return new CronTrigger(cron).nextExecutionTime(triggerContext);
}
);
}
}
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