Bryan Bende created NIFI-2909:
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Summary: 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
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