mfateev

   async function main(userId, intervals){ 
     // Send reminder emails, e.g. after 1, 7, and 30 days
   
     for (const interval of intervals) {
       await sleep(interval * DAYS);
       // can take hours if the downstream service is down
       await activities.sendEmail(interval, userId); 
     } 
     // Easily cancelled when user unsubscribes
   } 

      boolean trialPeriod = true;
      while (true) {
        Workflow.sleep(Duration.ofDays(30));
        activities.chargeMonthlyFee(customerId);
        if (trialPeriod) {
          activities.sendEndOfTrialEmail(customerId);
          trialPeriod = false;
        } else {
          activities.sendMonthlyChargeEmail(customerId);
        }
      }