micrometer-metrics/micrometer

Support for removing metrics registered by CaffeineCacheMetrics

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#5,297 opened on Jul 10, 2024

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enhancementhelp wantedinstrumentationmodule: micrometer-core

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Description

Please describe the feature request. Currently we are able to add instrumentations of lets say caffeine cache based on a reference but we can't remove them.

Rationale The rationale behind this is we have a caffiene cache that is configurable from database config and hence we change the reference for the same and they are re-constructed. In this case we remove the reference to old caches and add new ones but we want to re-register the new ones but since one is already registered with the ealier name the new one is not registered and honoured, hence we should have a way to remove the old ones and be able to replace it with the new ones.

Contributor guide

Research direction
Inspect the CaffeineCacheMetrics class to understand how metrics are registered (likely via MeterRegistry) and identify where a removal method should be added. Look for existing patterns in the codebase for unregistering metrics.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GitJava
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70