[jira] [Created] (MNG-6899) Maven Runtime Metrics System

["Enrico Olivelli (Jira)" <ji...@apache.org>]

Enrico Olivelli created MNG-6899:
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             Summary: Maven Runtime Metrics System
                 Key: MNG-6899
                 URL: https://issues.apache.org/jira/browse/MNG-6899
             Project: Maven
          Issue Type: New Feature
          Components: Performance
    Affects Versions: 3.6.3
            Reporter: Enrico Olivelli
            Assignee: Enrico Olivelli
             Fix For: 3.7.0-candidate


The idea is to have a mechanism to track runtime metrics for Maven Core itself and for plugins.

We introduce a new Metrics API that defines Counters, Summaries and other types of metrics.

The default implementation of the Metrics API will be a no-operation dummy implementation, that does not add significant overhead at runtime.

We will provide as separate modules an implementation that gathers all of the metric and output them to console or to a file, that can be easily parsed by tools, like Jenkins.

I will also contribute an implementation for Prometheus.io, this way we can track how the system behaves at runtime, Prometheus.io and other metrics systems store time series data and this is very useful to track down to hotspots during Maven execution.

For the first implementation we will introduce some base instrumentation of Maven Core, in order to have some useful metric.

The Metrics System will be loaded from "Extensions" and we will use usual @Inject  mechanism. Maven Core will bundle the noop implementation but it will be overridden by other implementations found on the main classloader of Maven, as we do for other compoments.





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