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Idempotency filter

This blip is not on the current edition of the Radar. If it was on one of the last few editions it is likely that it is still relevant. If the blip is older it might no longer be relevant and our assessment might be different today. Unfortunately, we simply don't have the bandwidth to continuously review blips from previous editions of the RadarUnderstand more
Published: Nov 10, 2015
Last Updated: Apr 05, 2016
Apr 2016

Many services, especially legacy services, are written with the assumption that any request will occur only once. Networks being what they are, this can be difficult to arrange. An idempotency filter is a simple component that merely checks for duplicate requests and ensures that they are sent to the supplier service only once. Such a filter should do only this one task and be used as a decorator over existing service calls.

Nov 2015