exceptionfactory commented on code in PR #10688:
URL: https://github.com/apache/nifi/pull/10688#discussion_r2713678310


##########
nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/components/validation/StandardVerifiableComponentFactory.java:
##########
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.components.validation;
+
+import org.apache.nifi.controller.ControllerService;
+import org.apache.nifi.controller.ControllerServiceInitializationContext;
+import org.apache.nifi.controller.FlowController;
+import org.apache.nifi.controller.ProcessorNode;
+import org.apache.nifi.controller.VerifiableControllerService;
+import 
org.apache.nifi.controller.exception.ControllerServiceInstantiationException;
+import org.apache.nifi.controller.exception.ProcessorInstantiationException;
+import org.apache.nifi.controller.service.ControllerServiceNode;
+import 
org.apache.nifi.controller.service.StandardControllerServiceInitializationContext;
+import org.apache.nifi.processor.Processor;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.StandardProcessorInitializationContext;
+import org.apache.nifi.processor.VerifiableProcessor;
+import org.apache.nifi.util.NiFiProperties;
+
+public class StandardVerifiableComponentFactory implements 
VerifiableComponentFactory {
+
+    private final FlowController flowController;
+    private final NiFiProperties nifiProperties;
+    public StandardVerifiableComponentFactory(final FlowController 
flowController, final NiFiProperties nifiProperties) {
+        this.flowController = flowController;
+        this.nifiProperties = nifiProperties;
+    }
+
+    @Override
+    public VerifiableProcessor createProcessor(final ProcessorNode 
processorNode, final ClassLoader classLoader) throws 
ProcessorInstantiationException {
+        final VerifiableProcessor verifiableProcessor;
+        final String identifier = processorNode.getIdentifier();
+        try {
+            final Class<?> rawProcessorClass = 
Class.forName(processorNode.getProcessor().getClass().getName(), true, 
classLoader);
+            final Class<? extends VerifiableProcessor> processorClass = 
rawProcessorClass.asSubclass(VerifiableProcessor.class);
+            verifiableProcessor = 
processorClass.getDeclaredConstructor().newInstance();
+
+            final ProcessorInitializationContext tempInitializationContext = 
new StandardProcessorInitializationContext(identifier, 
processorNode.getLogger(),
+                    flowController.getControllerServiceProvider(), 
flowController, flowController.createKerberosConfig(nifiProperties));
+            if (verifiableProcessor instanceof Processor processor) {
+                processor.initialize(tempInitializationContext);
+            }
+        } catch (Exception e) {
+            throw new ProcessorInstantiationException("Could not instantiate 
Processor", e);

Review Comment:
   The class name should be included for troubleshooting:
   
   ```suggestion
               throw new ProcessorInstantiationException("Failed to instantiate 
Verifiable Processor Class [%s]".formatted(processorClass), e);
   ```



##########
nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/components/validation/StandardVerifiableComponentFactory.java:
##########
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.components.validation;
+
+import org.apache.nifi.controller.ControllerService;
+import org.apache.nifi.controller.ControllerServiceInitializationContext;
+import org.apache.nifi.controller.FlowController;
+import org.apache.nifi.controller.ProcessorNode;
+import org.apache.nifi.controller.VerifiableControllerService;
+import 
org.apache.nifi.controller.exception.ControllerServiceInstantiationException;
+import org.apache.nifi.controller.exception.ProcessorInstantiationException;
+import org.apache.nifi.controller.service.ControllerServiceNode;
+import 
org.apache.nifi.controller.service.StandardControllerServiceInitializationContext;
+import org.apache.nifi.processor.Processor;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.StandardProcessorInitializationContext;
+import org.apache.nifi.processor.VerifiableProcessor;
+import org.apache.nifi.util.NiFiProperties;
+
+public class StandardVerifiableComponentFactory implements 
VerifiableComponentFactory {
+
+    private final FlowController flowController;
+    private final NiFiProperties nifiProperties;
+    public StandardVerifiableComponentFactory(final FlowController 
flowController, final NiFiProperties nifiProperties) {
+        this.flowController = flowController;
+        this.nifiProperties = nifiProperties;
+    }
+
+    @Override
+    public VerifiableProcessor createProcessor(final ProcessorNode 
processorNode, final ClassLoader classLoader) throws 
ProcessorInstantiationException {
+        final VerifiableProcessor verifiableProcessor;
+        final String identifier = processorNode.getIdentifier();
+        try {
+            final Class<?> rawProcessorClass = 
Class.forName(processorNode.getProcessor().getClass().getName(), true, 
classLoader);
+            final Class<? extends VerifiableProcessor> processorClass = 
rawProcessorClass.asSubclass(VerifiableProcessor.class);
+            verifiableProcessor = 
processorClass.getDeclaredConstructor().newInstance();
+
+            final ProcessorInitializationContext tempInitializationContext = 
new StandardProcessorInitializationContext(identifier, 
processorNode.getLogger(),
+                    flowController.getControllerServiceProvider(), 
flowController, flowController.createKerberosConfig(nifiProperties));
+            if (verifiableProcessor instanceof Processor processor) {
+                processor.initialize(tempInitializationContext);
+            }
+        } catch (Exception e) {
+            throw new ProcessorInstantiationException("Could not instantiate 
Processor", e);
+        }
+        return verifiableProcessor;
+    }
+
+    @Override
+    public VerifiableControllerService createControllerService(final 
ControllerServiceNode serviceNode, final ClassLoader classLoader) {
+        final VerifiableControllerService verifiableControllerService;
+        final String identifier = serviceNode.getIdentifier();
+        try {
+            final Class<?> rawControllorServiceClass = 
Class.forName(serviceNode.getCanonicalClassName(), true, classLoader);
+            final Class<? extends VerifiableControllerService> 
controllerServiceClass = 
rawControllorServiceClass.asSubclass(VerifiableControllerService.class);
+            verifiableControllerService = 
controllerServiceClass.getDeclaredConstructor().newInstance();
+
+            final ControllerServiceInitializationContext 
tempInitializationContext = new 
StandardControllerServiceInitializationContext(identifier,
+                    serviceNode.getLogger(),
+                    flowController.getControllerServiceProvider(), 
flowController.getStateManagerProvider().getStateManager(identifier),
+                    flowController.createKerberosConfig(nifiProperties), 
flowController);
+            if (verifiableControllerService instanceof ControllerService 
controllerService) {
+                controllerService.initialize(tempInitializationContext);
+            }
+        } catch (Exception e) {
+            throw new ControllerServiceInstantiationException("Could not 
instantiate Controller Service", e);

Review Comment:
   Some comments as above regarding class name reference for troubleshooting.



##########
nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/controller/service/StandardControllerServiceNode.java:
##########
@@ -919,4 +932,8 @@ private long getDelay(final AtomicLong trackedDelay, final 
long incrementalDelay
 
         return selectedDelay;
     }
+
+    public VerifiableComponentFactory getVerifiableComponentFactory() {

Review Comment:
   Is this public get method needed? 



##########
nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/components/validation/StandardVerifiableComponentFactory.java:
##########
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.components.validation;
+
+import org.apache.nifi.controller.ControllerService;
+import org.apache.nifi.controller.ControllerServiceInitializationContext;
+import org.apache.nifi.controller.FlowController;
+import org.apache.nifi.controller.ProcessorNode;
+import org.apache.nifi.controller.VerifiableControllerService;
+import 
org.apache.nifi.controller.exception.ControllerServiceInstantiationException;
+import org.apache.nifi.controller.exception.ProcessorInstantiationException;
+import org.apache.nifi.controller.service.ControllerServiceNode;
+import 
org.apache.nifi.controller.service.StandardControllerServiceInitializationContext;
+import org.apache.nifi.processor.Processor;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.StandardProcessorInitializationContext;
+import org.apache.nifi.processor.VerifiableProcessor;
+import org.apache.nifi.util.NiFiProperties;
+
+public class StandardVerifiableComponentFactory implements 
VerifiableComponentFactory {
+
+    private final FlowController flowController;
+    private final NiFiProperties nifiProperties;
+    public StandardVerifiableComponentFactory(final FlowController 
flowController, final NiFiProperties nifiProperties) {
+        this.flowController = flowController;
+        this.nifiProperties = nifiProperties;
+    }
+
+    @Override
+    public VerifiableProcessor createProcessor(final ProcessorNode 
processorNode, final ClassLoader classLoader) throws 
ProcessorInstantiationException {
+        final VerifiableProcessor verifiableProcessor;
+        final String identifier = processorNode.getIdentifier();
+        try {
+            final Class<?> rawProcessorClass = 
Class.forName(processorNode.getProcessor().getClass().getName(), true, 
classLoader);

Review Comment:
   Recommend declaring `processorClassName` outside of the try-catch block so 
that it can be used in the exception message.



##########
nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/StandardReloadComponent.java:
##########
@@ -119,7 +119,6 @@ public void reload(final ProcessorNode existingNode, final 
String newType, final
         flowController.getValidationTrigger().trigger(existingNode);
     }
 
-

Review Comment:
   This line change can be reverted



##########
nifi-stateless/nifi-stateless-bundle/nifi-stateless-engine/src/main/java/org/apache/nifi/stateless/engine/StatelessVerifiableComponentFactory.java:
##########
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.stateless.engine;
+
+import org.apache.nifi.components.state.StateManagerProvider;
+import org.apache.nifi.components.validation.VerifiableComponentFactory;
+import org.apache.nifi.controller.ControllerService;
+import org.apache.nifi.controller.ControllerServiceInitializationContext;
+import org.apache.nifi.controller.ProcessorNode;
+import org.apache.nifi.controller.VerifiableControllerService;
+import 
org.apache.nifi.controller.exception.ControllerServiceInstantiationException;
+import org.apache.nifi.controller.exception.ProcessorInstantiationException;
+import org.apache.nifi.controller.kerberos.KerberosConfig;
+import org.apache.nifi.controller.service.ControllerServiceNode;
+import org.apache.nifi.controller.service.ControllerServiceProvider;
+import 
org.apache.nifi.controller.service.StandardControllerServiceInitializationContext;
+import org.apache.nifi.processor.Processor;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.StandardProcessorInitializationContext;
+import org.apache.nifi.processor.VerifiableProcessor;
+
+public class StatelessVerifiableComponentFactory implements 
VerifiableComponentFactory {
+
+    private final StateManagerProvider stateManagerProvider;
+    private final ControllerServiceProvider controllerServiceProvider;
+    private final KerberosConfig kerberosConfig;
+
+    public StatelessVerifiableComponentFactory(final StateManagerProvider 
stateManagerProvider, final ControllerServiceProvider 
controllerServiceProvider, final KerberosConfig kerberosConfig) {
+        this.stateManagerProvider = stateManagerProvider;
+        this.controllerServiceProvider = controllerServiceProvider;
+        this.kerberosConfig = kerberosConfig;
+    }
+
+    @Override
+    public VerifiableProcessor createProcessor(final ProcessorNode 
processorNode, final ClassLoader classLoader) throws 
ProcessorInstantiationException {
+        final VerifiableProcessor verifiableProcessor;
+        final String identifier = processorNode.getIdentifier();
+        try {
+            final Class<?> rawProcessorClass = 
Class.forName(processorNode.getProcessor().getClass().getName(), true, 
classLoader);
+            final Class<? extends VerifiableProcessor> processorClass = 
rawProcessorClass.asSubclass(VerifiableProcessor.class);
+            verifiableProcessor = 
processorClass.getDeclaredConstructor().newInstance();
+
+            final ProcessorInitializationContext tempInitializationContext = 
new StandardProcessorInitializationContext(identifier, 
processorNode.getLogger(),
+                    controllerServiceProvider, new 
StatelessNodeTypeProvider(), kerberosConfig);
+            if (verifiableProcessor instanceof Processor processor) {
+                processor.initialize(tempInitializationContext);
+            }
+        } catch (Exception e) {
+            throw new ProcessorInstantiationException("Could not instantiate 
Processor", e);

Review Comment:
   Same comments in these methods as in the standard implementation



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