Some starter activities poll for a change in state at the specified polling interval. Once the poll occurs and the change of state is detected, an orchestration job is started to start processing.
For example, during run time, the FTP Poll Directory activity polls for the existence of the specified file or files on the FTP server at the specified location and polling interval.
You specify the polling interval for the starter activity in the Delivery Rules task of the Checklist for the activity. The polling interval determines how often a poll occurs to check for a change in state. Once an orchestration that starts with a polling starter activity is published and deployed, the first poll occurs when the orchestration is deployed and the second poll occurs at the next time interval in the polling schedule. For example, if the polling interval is 10 minutes and the orchestration is deployed at 10:14 PM, the first poll occurs at 10:14 PM and the second poll occurs at 10:20 PM, which is the next interval of 10 minutes, as shown in the following figure:
The intervals start at the beginning of the hour, 10:00 PM in this example.
The following starter activities poll for a change in state: