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Joshua Goldman · Mar 10, 2017

How to route a file based on file type

#Business Process (BPL) #Business Rules #Ensemble

This question came in on an Ensemble email list:

  • I need to route a file based on its type in Ensemble Production. But I don't want to write a Business Process code to achieve this.
  •  Am using FilePassThroughService to get a file. There are two FilePassthrough operations for different type of files.
  •  Is there anyway to achieve this routing using Business Process Rule itself?
  •  Also how to get the filename in Business Process Rule that comes from FilePassThroughService?       

Are you determining the file type by the file name extension or by the contents of the file?

If you're doing it by the file name extension, the easiest way to handle this is to have different pass through business services for each file type and then send it directly to the correct file operation. You don't need a router at all.

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Joshua Goldman · Mar 10, 2017

If you do need to do this in a router. Here is the overall process.

  1.  Define a business rule. Make it a General Message Routing Rule and have the assist class be EnsLib.MsgRouter.RuleAssist.
  2. Add a rule to the rule set and double-click Constraint. Specify the rule class
    Persistent > ENS > StreamContainer
    That's the message class used by the pass-through file service/operation. You can also specify the business service as the source.
  3. Double-click  condition, and in the expression editor specify Document.Type or Document.OriginalFilename, add an operation, and a  value.
  4. Send it to the correct operation.
  5. Define a router business process and specify the rule you just created.
  6. Connect the pass-through file service to the router.

But you may not need the router at all.

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