Enhancement Request : Add support for exponential backoff retry in Helidon MP

[asantaga]

Environment Details

• Helidon Version: 2.5
• Helidon MP
• JDK version: N/A
• OS: N/A
• Docker version (if applicable):

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Problem Description

Helidon MP specification does not support exponential back off in MP and whilst there is a ER at Eclipse , it has not be actioned for some time (link). Helidon SE does support the DelayingRetryPolicy which is close to what we want but its not available in MP. Realise this would be an enhancement which is out of MP spec but until the eclipse spec finalises their ER can we implement this feature in Helidon MP?

Worth noting another MP provider, Smallrye.io( https://smallrye.io/blog/fault-tolerance-5-2/ deployed in Quarkus) has implemented this functionality in their project, specifically they support Exponential, Fibonacci and a custom backoff retry policies

Steps to reproduce

N/A