Maintenance: extract lru-cache implementation into commons package

[dreamorosi]

Summary

The Idempotency utility has an implementation of LRU (Least Recently Used) cache that is used to keep idempotency records in memory. At present this utility is not exposed to consumers and so cannot be used outside of the utility.

With this issue I propose to move that implementation to the commons package and export it as a sub-path export so that it can be selectively used by other utilities or customers.

Why is this needed?

So that other utilities as well as customers can use it.

Currently the JMESPath utility uses a naive cache that simply evicts half of the entries when the max size is used. Switching to a LRU implementation would allow to keep around values that are used more often.

Which area does this relate to?

Commons

Solution

No response

Acknowledgment

• This request meets Powertools for AWS Lambda (TypeScript) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET

Future readers

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[github-actions]

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[github-actions]

This is now released under v2.7.0 version!