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System.schedule('审批历史15分刷新', '0 15 * * * ?', newProjectApprovalScheduler());                                

System.schedule('审批历史30分刷新', '0 30 * * * ?', newProjectApprovalScheduler());

System.schedule('审批历史45分刷新', '0 45 * * * ?', newProjectApprovalScheduler());

 

Scheduler写法

Scheduler中添加batch（批处理）

globalwithsharingclass SchedulerRunSendMessageBatch implements Schedulable

{

    globalvoid execute(SchedulableContext sc)

    {

        BatchSendMessage bcrbatch = new BatchSendMessage();

         Database.executeBatch(bcrbatch);

    }

}