Igor Fedorenko created MNG-5669:
-----------------------------------
Summary: same pom.xml is read multiple times
Key: MNG-5669
URL: https://jira.codehaus.org/browse/MNG-5669
Project: Maven
Issue Type: Bug
Affects Versions: 3.2.3
Reporter: Igor Fedorenko
The same parent pom.xml is read multiple times during single
ProjectBuilder#build invocation. This is a performance regression introduced in
3.2.3-SNAPSHOT. I do not know how much this affects real-world build
performance.
~~~~~
ProjectBuilder#build(File,ModelSource,...) first constructs project model then
initializes MavenProject instance.
When project model is constructed, all local and remote parent pom.xml files
are read and stored in model cache during ModelBuilder#readParent. The cache
uses GAV keys. Only parent models are stored in the cache. The model of the
project being being is not cached.
When MavenProject instance is initialized, ProjectBuilder#build is called
recursively to create parent MavenProject instances.
There are appears to be two problems
* ModelCache used to create original project Model is not passed to the
recursive ProjectBuilder#build invocation.
* ProjectBuilder#build does not use ModelCache for the project being built.
During recursive invocation, this means the cache is never used to load
parent pom.xml models cached during outer ProjectBuilder#build invocation.
The solution is to introduce additional short-lived model cached keyed by
pom.xml file location (project GAV is not known when ProjectBuilder#build is
called). Alternatively, introduce ProjectBuilder#buildParent that will use
the model cache.
--
This message was sent by Atlassian JIRA
(v6.1.6#6162)
