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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