[
https://issues.apache.org/jira/browse/NIFI-2909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15645382#comment-15645382
]
ASF GitHub Bot commented on NIFI-2909:
--------------------------------------
Github user olegz commented on the issue:
https://github.com/apache/nifi/pull/1156
@bbende I now tend to agree. Per-lifecycle class loading is an edge case
and we only use it right now in SpringContextProcessor where it is required due
to the fact that Spring itself is a developer framework and it's class path
heavily depends on volatile artifacts (e.g., configuration files, application
code etc.). So while most JARs will remain the same, the overall classpath may
change after re-starts. For the cases where one deals with JMS
ConectionFactories and JDBS Drivers that most likely never be the case.
> Provide a framework mechanism for loading additional classpath resources
> ------------------------------------------------------------------------
>
> Key: NIFI-2909
> URL: https://issues.apache.org/jira/browse/NIFI-2909
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Bryan Bende
> Assignee: Bryan Bende
> Fix For: 1.1.0
>
>
> We currently have several components with a property for specifying
> additional classpath resources (DBCP connection pool, scripting processors,
> JMS). Each of these components is responsible for handling this in its own
> way.
> The framework should provide a more integrated solution to make it easier for
> component developers to deal with this scenario. Some requirements that need
> to be met by this solution:
> - Multiple instances of the same component with different resources added to
> the classpath and not interfering with each other (i.e. two DBCP connection
> pools using different drivers)
> - Ability to modify the actual ClassLoader of the component to deal with
> frameworks that use Class.forName() without passing in a ClassLoader, meaning
> if a processor loads class A and class A calls Class.forName(classBName),
> then class B needs to be available in the ClassLoader that loaded the
> processor's class which in turn loaded class A
> - A component developer should be able to indicate that a given
> PropertyDescriptor represents a classpath resource and the framework should
> take care of the ClassLoader manipulation
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
