Sender File Adapter: Process in Sequence + Time delay + Error for sequence break

Hello All,

I have a File adapter scenario where PI needs to :

1. Pick file/s from a folder in a sequence(based on sequence number in file name)
2. Wait incase a sequence number is missed
3. Issue an error message if one of the sequence message is missed and subsequent files with next sequence numbers arrive.

Eaxmple Scenario:

• -Monday(am) Source system writes 3 files into a folder - FILE_1, FILE_2, FILE_3
• -Monady(am) PI picks all the 3 files and processes them in correct sequence
• -Monday(pm) Source system writes 2 files FILE_5, FILE_6 into the folder
• -Monday(pm) PI should NOT process these 2 files as FILE_4 is missing
• -Tuesday(am) PI should RAISE an alert if FILE_4 has still not arrived.

So my question is:

1. Have any of you dealt with this scenario - if yes how ?
2. If you have not, any ideas how we could achieve this.

I am on PI 7.31 AEX.

Regards

SAP_PI_XI