Claim-Check

Split a large message into a claim check and a payload. Send the claim check to the messaging platform and store the payload to an external service. 

When to use this pattern?  

• Whenever a message size cannot fit the supported message limit of the chosen message bus technology.  

• Ensure that security is enforced, when sensitive data is stored in the payload.

Challenges for a large message

• Message size limitations

• Subscriber processing limitations

Solution Design

Keep the large file in the external storage or database and keep the reference in the service queue

Considerations  

• Consider deleting the message data after consuming it, if you don’t need to archive it. 

  •  Synchronously  

  • Asynchronously  

• Storing and retrieving the message content causes additional overhead and latency