NIFI-13560 Changed Parameter Provider handling to avoid storing values (#9102)

- Added ParameterValueMapper for handling serialization of Parameter Values for Flow Configuration
- Added Parameter Group retrieval method for Flow Synchronizer

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/controller/parameter/StandardParameterProviderNode.java

@@ -339,6 +339,20 @@ public class StandardParameterProviderNode extends AbstractComponentNode impleme
         }
     }
 
+    @Override
+    public Optional<ParameterGroup> findFetchedParameterGroup(final String parameterGroupName) {
+        Objects.requireNonNull(parameterGroupName, "Parameter Group Name required");
+
+        readLock.lock();
+        try {
+            return fetchedParameterGroups.stream()
+                    .filter(parameterGroup -> parameterGroup.getGroupName().equals(parameterGroupName))
+                    .findFirst();
+        } finally {
+            readLock.unlock();
+        }
+    }
+
     @Override
     public void verifyCanApplyParameters(final Collection<ParameterGroupConfiguration> parameterGroupConfigurations) {
         if (fetchedParameterGroups.isEmpty()) {

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/parameter/FilterSensitiveParameterValueMapper.java

@@ -0,0 +1,47 @@
+/*
+ * 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.parameter;
+
+import java.util.Objects;
+
+/**
+ * Filter values and return null for Parameter values with sensitive descriptors
+ */
+public class FilterSensitiveParameterValueMapper implements ParameterValueMapper {
+    /**
+     * Get mapped Parameter value based on properties
+     *
+     * @param parameter Parameter with descriptor of attributes for mapping
+     * @param value Parameter value to be mapped
+     * @return Mapped Parameter value
+     */
+    @Override
+    public String getMapped(final Parameter parameter, final String value) {
+        Objects.requireNonNull(parameter, "Parameter required");
+
+        final ParameterDescriptor descriptor = parameter.getDescriptor();
+        final String mapped;
+
+        if (descriptor.isSensitive()) {
+            mapped = null;
+        } else {
+            mapped = value;
+        }
+
+        return mapped;
+    }
+}

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/parameter/ParameterValueMapper.java

@@ -0,0 +1,31 @@
+/*
+ * 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.parameter;
+
+/**
+ * Abstraction for mapping Parameter values from runtime representation to versioned representation
+ */
+public interface ParameterValueMapper {
+    /**
+     * Get mapped Parameter value based on properties
+     *
+     * @param parameter Parameter with descriptor of attributes for mapping
+     * @param value Parameter value to be mapped
+     * @return Mapped Parameter value
+     */
+    String getMapped(Parameter parameter, String value);
+}

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/parameter/StandardParameterValueMapper.java

@@ -0,0 +1,66 @@
+/*
+ * 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.parameter;
+
+import org.apache.nifi.registry.flow.mapping.SensitiveValueEncryptor;
+
+import java.util.Objects;
+
+/**
+ * Standard implementation with encryptor for sensitive values
+ */
+public class StandardParameterValueMapper implements ParameterValueMapper {
+    static final String PROVIDED_MAPPING = "provided:parameter";
+
+    private static final String ENCRYPTED_FORMAT = "enc{%s}";
+
+    private final SensitiveValueEncryptor sensitiveValueEncryptor;
+
+    public StandardParameterValueMapper(final SensitiveValueEncryptor sensitiveValueEncryptor) {
+        this.sensitiveValueEncryptor = sensitiveValueEncryptor;
+    }
+
+    /**
+     * Get mapped Parameter value based on properties
+     *
+     * @param parameter Parameter with descriptor of attributes for mapping
+     * @param value Parameter value to be mapped
+     * @return Mapped Parameter value
+     */
+    @Override
+    public String getMapped(final Parameter parameter, final String value) {
+        Objects.requireNonNull(parameter, "Parameter required");
+
+        final ParameterDescriptor descriptor = parameter.getDescriptor();
+        final String mapped;
+
+        if (parameter.isProvided()) {
+            mapped = PROVIDED_MAPPING;
+        } else if (descriptor.isSensitive()) {
+            if (sensitiveValueEncryptor == null) {
+                mapped = value;
+            } else {
+                final String encrypted = sensitiveValueEncryptor.encrypt(value);
+                mapped = ENCRYPTED_FORMAT.formatted(encrypted);
+            }
+        } else {
+            mapped = value;
+        }
+
+        return mapped;
+    }
+}

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/main/java/org/apache/nifi/registry/flow/mapping/NiFiRegistryFlowMapper.java

@@ -73,12 +73,15 @@ import org.apache.nifi.flow.VersionedResourceType;
 import org.apache.nifi.groups.ProcessGroup;
 import org.apache.nifi.groups.RemoteProcessGroup;
 import org.apache.nifi.nar.ExtensionManager;
+import org.apache.nifi.parameter.FilterSensitiveParameterValueMapper;
 import org.apache.nifi.parameter.Parameter;
 import org.apache.nifi.parameter.ParameterContext;
 import org.apache.nifi.parameter.ParameterDescriptor;
 import org.apache.nifi.parameter.ParameterProvider;
 import org.apache.nifi.parameter.ParameterProviderConfiguration;
 import org.apache.nifi.parameter.ParameterReferencedControllerServiceData;
+import org.apache.nifi.parameter.ParameterValueMapper;
+import org.apache.nifi.parameter.StandardParameterValueMapper;
 import org.apache.nifi.processor.Relationship;
 import org.apache.nifi.registry.flow.FlowRegistryClientNode;
 import org.apache.nifi.registry.flow.VersionControlInformation;
@@ -107,6 +110,7 @@ public class NiFiRegistryFlowMapper {
 
     private final ExtensionManager extensionManager;
     private final FlowMappingOptions flowMappingOptions;
+    private final ParameterValueMapper parameterValueMapper;
 
     // We need to keep a mapping of component id to versionedComponentId as we transform these objects. This way, when
     // we call #mapConnectable, instead of generating a new UUID for the ConnectableComponent, we can lookup the 'versioned'
@@ -121,6 +125,12 @@ public class NiFiRegistryFlowMapper {
     public NiFiRegistryFlowMapper(final ExtensionManager extensionManager, final FlowMappingOptions flowMappingOptions) {
         this.extensionManager = extensionManager;
         this.flowMappingOptions = flowMappingOptions;
+
+        if (flowMappingOptions.isMapSensitiveConfiguration()) {
+            this.parameterValueMapper = new StandardParameterValueMapper(flowMappingOptions.getSensitiveValueEncryptor());
+        } else {
+            this.parameterValueMapper = new FilterSensitiveParameterValueMapper();
+        }
     }
 
     /**
@@ -911,10 +921,10 @@ public class NiFiRegistryFlowMapper {
             if (referencedControllerServiceData.isEmpty()) {
                 versionedParameter = mapParameter(parameter);
             } else {
-                versionedParameter = mapParameter(
+                final String referencedVersionServiceId = referencedControllerServiceData.getFirst().getVersionedServiceId();
-                    parameter,
+                final String parameterValue = parameter.getValue();
-                    getId(Optional.ofNullable(referencedControllerServiceData.get(0).getVersionedServiceId()), parameter.getValue())
+                final String serviceId = getId(Optional.ofNullable(referencedVersionServiceId), parameterValue);
-                );
+                versionedParameter = mapParameter(parameter, serviceId);
             }
         } else {
             versionedParameter = mapParameter(parameter);
@@ -954,19 +964,8 @@ public class NiFiRegistryFlowMapper {
         versionedParameter.setSensitive(descriptor.isSensitive());
         versionedParameter.setProvided(parameter.isProvided());
 
-        final boolean mapParameterValue = flowMappingOptions.isMapSensitiveConfiguration() || !descriptor.isSensitive();
+        final String mapped = parameterValueMapper.getMapped(parameter, value);
-        final String parameterValue;
+        versionedParameter.setValue(mapped);
-        if (mapParameterValue) {
-            if (descriptor.isSensitive()) {
-                parameterValue = encrypt(value);
-            } else {
-                parameterValue = value;
-            }
-        } else {
-            parameterValue = null;
-        }
-
-        versionedParameter.setValue(parameterValue);
         return versionedParameter;
     }
 

nifi-framework-bundle/nifi-framework/nifi-framework-components/src/test/java/org/apache/nifi/parameter/TestStandardParameterValueMapper.java

@@ -0,0 +1,86 @@
+/*
+ * 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.parameter;
+
+import org.apache.nifi.registry.flow.mapping.SensitiveValueEncryptor;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+@ExtendWith(MockitoExtension.class)
+class TestStandardParameterValueMapper {
+    private static final String NAME = "NamedParameter";
+
+    private static final String VALUE = "ParameterValue";
+
+    @Mock
+    private SensitiveValueEncryptor sensitiveValueEncryptor;
+
+    private StandardParameterValueMapper mapper;
+
+    @BeforeEach
+    void setMapper() {
+        mapper = new StandardParameterValueMapper(sensitiveValueEncryptor);
+    }
+
+    @Test
+    void testGetMappedNotSensitiveNotProvided() {
+        final Parameter parameter = getParameter(false, false);
+
+        final String mapped = mapper.getMapped(parameter, VALUE);
+
+        assertEquals(VALUE, mapped);
+    }
+
+    @Test
+    void testGetMappedNotSensitiveProvided() {
+        final Parameter parameter = getParameter(false, true);
+
+        final String mapped = mapper.getMapped(parameter, VALUE);
+
+        assertEquals(StandardParameterValueMapper.PROVIDED_MAPPING, mapped);
+    }
+
+    @Test
+    void testGetMappedSensitiveProvided() {
+        final Parameter parameter = getParameter(true, true);
+
+        final String mapped = mapper.getMapped(parameter, VALUE);
+
+        assertEquals(StandardParameterValueMapper.PROVIDED_MAPPING, mapped);
+    }
+
+    @Test
+    void testGetMappedSensitiveNotProvided() {
+        final Parameter parameter = getParameter(true, false);
+
+        final String mapped = mapper.getMapped(parameter, VALUE);
+
+        assertNotEquals(VALUE, mapped);
+        assertNotEquals(StandardParameterValueMapper.PROVIDED_MAPPING, mapped);
+    }
+
+    private Parameter getParameter(final boolean sensitive, final boolean provided) {
+        final ParameterDescriptor descriptor = new ParameterDescriptor.Builder().name(NAME).sensitive(sensitive).build();
+        return new Parameter(descriptor, VALUE, null, provided);
+    }
+}

nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/controller/ParameterProviderNode.java

@@ -20,11 +20,13 @@ import org.apache.nifi.components.ConfigVerificationResult;
 import org.apache.nifi.logging.ComponentLog;
 import org.apache.nifi.nar.ExtensionManager;
 import org.apache.nifi.parameter.ParameterContext;
+import org.apache.nifi.parameter.ParameterGroup;
 import org.apache.nifi.parameter.ParameterProvider;
 import org.apache.nifi.parameter.ParameterGroupConfiguration;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.Optional;
 import java.util.Set;
 
 public interface ParameterProviderNode extends ComponentNode {
@@ -41,12 +43,30 @@ public interface ParameterProviderNode extends ComponentNode {
 
     void verifyCanFetchParameters();
 
+    /**
+     * Retrieve Parameter Groups from configured Parameter Provider and store for subsequent retrieval in others methods
+     *
+     */
     void fetchParameters();
 
+    /**
+     * Find a named Parameter Group cached from previous request to fetch Parameters from the configured Parameter Provider
+     *
+     * @param parameterGroupName Parameter Group Name to find
+     * @return Parameter Group with Parameter Names and Values or empty when not found
+     */
+    Optional<ParameterGroup> findFetchedParameterGroup(String parameterGroupName);
+
     void verifyCanApplyParameters(Collection<ParameterGroupConfiguration> parameterNames);
 
     Collection<ParameterGroupConfiguration> getParameterGroupConfigurations();
 
+    /**
+     * Get Parameter Groups with Parameter Names and Values to be applied to associated Parameter Contexts
+     *
+     * @param parameterGroupConfigurations Parameter Group Configurations to be retrieved
+     * @return List of Parameter Groups and Parameter Contexts to be applied based on Parameters retrieved in previous fetch requests
+     */
     List<ParametersApplication> getFetchedParametersToApply(Collection<ParameterGroupConfiguration> parameterGroupConfigurations);
 
     void verifyCanClearState();
@@ -76,7 +96,7 @@ public interface ParameterProviderNode extends ComponentNode {
      * @param context the configuration to verify
      * @param logger a logger that can be used when performing verification
      * @param extensionManager extension manager that is used for obtaining appropriate NAR ClassLoaders
-     * @return a list of results indicating whether or not the given configuration is valid
+     * @return a list of results indicating whether the given configuration is valid
      */
     List<ConfigVerificationResult> verifyConfiguration(ConfigurationContext context, ComponentLog logger, ExtensionManager extensionManager);
 }

nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/serialization/VersionedFlowSynchronizer.java

@@ -46,7 +46,6 @@ import org.apache.nifi.controller.inheritance.ConnectionMissingCheck;
 import org.apache.nifi.controller.inheritance.FlowInheritability;
 import org.apache.nifi.controller.inheritance.FlowInheritabilityCheck;
 import org.apache.nifi.controller.inheritance.MissingComponentsCheck;
-import org.apache.nifi.controller.reporting.ReportingTaskInstantiationException;
 import org.apache.nifi.controller.service.ControllerServiceNode;
 import org.apache.nifi.encrypt.PropertyEncryptor;
 import org.apache.nifi.flow.Bundle;
@@ -77,6 +76,7 @@ import org.apache.nifi.parameter.Parameter;
 import org.apache.nifi.parameter.ParameterContext;
 import org.apache.nifi.parameter.ParameterContextManager;
 import org.apache.nifi.parameter.ParameterDescriptor;
+import org.apache.nifi.parameter.ParameterGroup;
 import org.apache.nifi.parameter.ParameterProviderConfiguration;
 import org.apache.nifi.parameter.StandardParameterProviderConfiguration;
 import org.apache.nifi.persistence.FlowConfigurationArchiveManager;
@@ -115,10 +115,10 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.zip.GZIPInputStream;
 
@@ -381,24 +381,6 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
         return null;
     }
 
-    private BundleCoordinate getCompatibleBundle(final BundleCoordinate coordinate, final ExtensionManager extensionManager, final String type) {
-        final org.apache.nifi.bundle.Bundle exactBundle = extensionManager.getBundle(coordinate);
-        if (exactBundle != null) {
-            return coordinate;
-        }
-
-        final BundleDTO bundleDto = new BundleDTO(coordinate.getGroup(), coordinate.getId(), coordinate.getVersion());
-        final Optional<BundleCoordinate> optionalCoordinate = BundleUtils.getOptionalCompatibleBundle(extensionManager, type, bundleDto);
-        if (optionalCoordinate.isPresent()) {
-            final BundleCoordinate selectedCoordinate = optionalCoordinate.get();
-            logger.debug("Found compatible bundle {} for {} and type {}", selectedCoordinate.getCoordinate(), coordinate, type);
-            return selectedCoordinate;
-        }
-
-        logger.debug("Could not find a compatible bundle for {} and type {}", coordinate, type);
-        return null;
-    }
-
     private void synchronizeFlow(final FlowController controller, final DataFlow existingFlow, final DataFlow proposedFlow, final AffectedComponentSet affectedComponentSet) {
         // attempt to sync controller with proposed flow
         try {
@@ -594,7 +576,7 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
         flowRegistryClient.setProperties(decryptedProperties, false, sensitiveDynamicPropertyNames);
     }
 
-    private void inheritReportingTasks(final FlowController controller, final VersionedDataflow dataflow, final AffectedComponentSet affectedComponentSet) throws ReportingTaskInstantiationException {
+    private void inheritReportingTasks(final FlowController controller, final VersionedDataflow dataflow, final AffectedComponentSet affectedComponentSet) {
         final Set<String> versionedTaskIds = new HashSet<>();
         for (final VersionedReportingTask versionedReportingTask : dataflow.getReportingTasks()) {
             versionedTaskIds.add(versionedReportingTask.getInstanceIdentifier());
@@ -613,7 +595,7 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
         }
     }
 
-    private void addReportingTask(final FlowController controller, final VersionedReportingTask reportingTask) throws ReportingTaskInstantiationException {
+    private void addReportingTask(final FlowController controller, final VersionedReportingTask reportingTask) {
         final BundleCoordinate coordinate = createBundleCoordinate(extensionManager, reportingTask.getBundle(), reportingTask.getType());
 
         final ReportingTaskNode taskNode = controller.createReportingTask(reportingTask.getType(), reportingTask.getInstanceIdentifier(), coordinate, false);
@@ -823,7 +805,7 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
             final Map<String, VersionedParameterContext> namedParameterContexts,
             final PropertyEncryptor encryptor
     ) {
-        final Map<String, Parameter> parameters = createParameterMap(versionedParameterContext, encryptor);
+        final Map<String, Parameter> parameters = createParameterMap(flowManager, versionedParameterContext, encryptor);
 
         final ParameterContextManager contextManager = flowManager.getParameterContextManager();
         final List<String> referenceIds = findReferencedParameterContextIds(versionedParameterContext, contextManager, namedParameterContexts);
@@ -868,8 +850,13 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
         return referenceIds;
     }
 
-    private Map<String, Parameter> createParameterMap(final VersionedParameterContext versionedParameterContext,
+    private Map<String, Parameter> createParameterMap(
-                                                      final PropertyEncryptor encryptor) {
+            final FlowManager flowManager,
+            final VersionedParameterContext versionedParameterContext,
+            final PropertyEncryptor encryptor
+    ) {
+        final Map<String, Parameter> providedParameters = getProvidedParameters(flowManager, versionedParameterContext);
+
         final Map<String, Parameter> parameters = new HashMap<>();
         for (final VersionedParameter versioned : versionedParameterContext.getParameters()) {
             final ParameterDescriptor descriptor = new ParameterDescriptor.Builder()
@@ -882,6 +869,15 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
             final String rawValue = versioned.getValue();
             if (rawValue == null) {
                 parameterValue = null;
+            } else if (versioned.isProvided()) {
+                final String name = versioned.getName();
+                final Parameter providedParameter = providedParameters.get(name);
+                if (providedParameter == null) {
+                    logger.warn("Parameter Context [{}] Provided Parameter [{}] not found", versionedParameterContext.getIdentifier(), name);
+                    parameterValue = null;
+                } else {
+                    parameterValue = providedParameter.getValue();
+                }
             } else if (versioned.isSensitive()) {
                 parameterValue = decrypt(rawValue, encryptor);
             } else {
@@ -902,17 +898,11 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
             final Map<String, VersionedParameterContext> namedParameterContexts,
             final PropertyEncryptor encryptor
     ) {
-        final Map<String, Parameter> parameters = createParameterMap(versionedParameterContext, encryptor);
+        final Map<String, Parameter> parameters = createParameterMap(flowManager, versionedParameterContext, encryptor);
 
         final Map<String, String> currentValues = new HashMap<>();
         parameterContext.getParameters().values().forEach(param -> currentValues.put(param.getDescriptor().getName(), param.getValue()));
 
-        if (logger.isDebugEnabled()) {
-            final Map<String, String> proposedValues = parameters.entrySet().stream()
-                    .collect(Collectors.toMap(Entry::getKey, entry -> entry.getValue().getValue()));
-            logger.debug("For Parameter Context {}, current parameters = {}, proposed = {}", parameterContext.getName(), currentValues, proposedValues);
-        }
-
         final Map<String, Parameter> updatedParameters = new HashMap<>();
         final Set<String> proposedParameterNames = new HashSet<>();
         for (final VersionedParameter parameter : versionedParameterContext.getParameters()) {
@@ -1010,6 +1000,38 @@ public class VersionedFlowSynchronizer implements FlowSynchronizer {
         removeMissingServices(controller, dataflow);
     }
 
+    private Map<String, Parameter> getProvidedParameters(final FlowManager flowManager, final VersionedParameterContext versionedParameterContext) {
+        final Map<String, Parameter> providedProviders;
+        final String parameterProviderId = versionedParameterContext.getParameterProvider();
+        if (parameterProviderId == null) {
+            providedProviders = Collections.emptyMap();
+        } else {
+            final ParameterProviderNode parameterProviderNode = flowManager.getParameterProvider(parameterProviderId);
+            providedProviders = getProvidedParameters(parameterProviderNode, versionedParameterContext.getParameterGroupName());
+        }
+        return providedProviders;
+    }
+
+    private Map<String, Parameter> getProvidedParameters(final ParameterProviderNode parameterProviderNode, final String parameterGroupName) {
+        logger.debug("Fetching Parameters for Group [{}] from Provider [{}]", parameterGroupName, parameterProviderNode.getIdentifier());
+        parameterProviderNode.fetchParameters();
+
+        final Map<String, Parameter> parameters;
+        final Optional<ParameterGroup> foundParameterGroup = parameterProviderNode.findFetchedParameterGroup(parameterGroupName);
+        if (foundParameterGroup.isPresent()) {
+            final ParameterGroup parameterGroup = foundParameterGroup.get();
+            parameters = parameterGroup.getParameters().stream()
+                    .collect(
+                            Collectors.toMap(parameter -> parameter.getDescriptor().getName(), Function.identity())
+                    );
+        } else {
+            parameters = Collections.emptyMap();
+        }
+
+        logger.info("Fetched Parameters [{}] for Group [{}] from Provider [{}]", parameters.size(), parameterGroupName, parameterProviderNode.getIdentifier());
+        return parameters;
+    }
+
     private void removeMissingServices(final FlowController controller, final VersionedDataflow dataflow) {
         if (dataflow == null) {
             return;