dbkegley commented on a change in pull request #3651: NIFI-6539 Nifi stateless
init from flow xml
URL: https://github.com/apache/nifi/pull/3651#discussion_r314426530
##########
File path:
nifi-stateless/nifi-stateless-core/src/main/java/org/apache/nifi/stateless/core/ComponentFactory.java
##########
@@ -120,6 +124,74 @@ public StatelessProcessorWrapper createProcessor(final
VersionedProcessor versio
}
}
+ public StatelessProcessorWrapper createProcessor(final ProcessorDTO
processorDto, final boolean materializeContent, final
StatelessControllerServiceLookup controllerServiceLookup,
+ final VariableRegistry
variableRegistry, final Set<URL> classpathUrls, final ParameterContext
parameterContext)
+ throws ProcessorInstantiationException {
+
+ final String type = processorDto.getType();
+ final String identifier = processorDto.getId();
+
+ final Bundle bundle = getAvailableBundle(processorDto.getBundle(),
type);
+ if (bundle == null) {
+ throw new IllegalStateException("Unable to find bundle for
coordinate "
+ + processorDto.getBundle().getGroup() + ":"
+ + processorDto.getBundle().getArtifact() + ":"
+ + processorDto.getBundle().getVersion());
+ }
+
+ final ClassLoader ctxClassLoader =
Thread.currentThread().getContextClassLoader();
+ try {
+ final ClassLoader detectedClassLoader =
extensionManager.createInstanceClassLoader(type, identifier, bundle,
+ classpathUrls == null ? Collections.emptySet() :
classpathUrls);
+
+ logger.debug("Setting context class loader to {} (parent = {}) to
create {}", detectedClassLoader, detectedClassLoader.getParent(), type);
+ final Class<?> rawClass = Class.forName(type, true,
detectedClassLoader);
+ Thread.currentThread().setContextClassLoader(detectedClassLoader);
+
+ final Object extensionInstance = rawClass.newInstance();
+ final ComponentLog componentLog = new
SLF4JComponentLog(extensionInstance);
+
+ final Processor processor = (Processor) extensionInstance;
+ final ProcessorInitializationContext initializationContext = new
StatelessProcessorInitializationContext(processor.getIdentifier(), processor,
controllerServiceLookup);
Review comment:
yes, good catch
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