Examples with FlowSnippetDTO org.apache.nifi.web.api.dto.FlowSnippetDTO used on opensource projects

Example 26 with FlowSnippetDTO

use of org.apache.nifi.web.api.dto.FlowSnippetDTO in project nifi by apache.

the class StandardNiFiServiceFacade method postProcessNewFlowSnippet.

/**
 * Post processes a new flow snippet including validation, removing the snippet, and DTO conversion.
 *
 * @param groupId group id
 * @param snippet snippet
 * @return flow dto
 */
private FlowDTO postProcessNewFlowSnippet(final String groupId, final FlowSnippetDTO snippet) {
    // validate the new snippet
    validateSnippetContents(snippet);
    // identify all components added
    final Set<String> identifiers = new HashSet<>();
    snippet.getProcessors().stream().map(proc -> proc.getId()).forEach(id -> identifiers.add(id));
    snippet.getConnections().stream().map(conn -> conn.getId()).forEach(id -> identifiers.add(id));
    snippet.getInputPorts().stream().map(port -> port.getId()).forEach(id -> identifiers.add(id));
    snippet.getOutputPorts().stream().map(port -> port.getId()).forEach(id -> identifiers.add(id));
    snippet.getProcessGroups().stream().map(group -> group.getId()).forEach(id -> identifiers.add(id));
    snippet.getRemoteProcessGroups().stream().map(remoteGroup -> remoteGroup.getId()).forEach(id -> identifiers.add(id));
    snippet.getRemoteProcessGroups().stream().filter(remoteGroup -> remoteGroup.getContents() != null && remoteGroup.getContents().getInputPorts() != null).flatMap(remoteGroup -> remoteGroup.getContents().getInputPorts().stream()).map(remoteInputPort -> remoteInputPort.getId()).forEach(id -> identifiers.add(id));
    snippet.getRemoteProcessGroups().stream().filter(remoteGroup -> remoteGroup.getContents() != null && remoteGroup.getContents().getOutputPorts() != null).flatMap(remoteGroup -> remoteGroup.getContents().getOutputPorts().stream()).map(remoteOutputPort -> remoteOutputPort.getId()).forEach(id -> identifiers.add(id));
    snippet.getLabels().stream().map(label -> label.getId()).forEach(id -> identifiers.add(id));
    final ProcessGroup group = processGroupDAO.getProcessGroup(groupId);
    final ProcessGroupStatus groupStatus = controllerFacade.getProcessGroupStatus(groupId);
    return dtoFactory.createFlowDto(group, groupStatus, snippet, revisionManager, this::getProcessGroupBulletins);
}

Example 27 with FlowSnippetDTO

use of org.apache.nifi.web.api.dto.FlowSnippetDTO in project nifi by apache.

the class StandardSnippetDAO method copySnippet.

@Override
public FlowSnippetDTO copySnippet(final String groupId, final String snippetId, final Double originX, final Double originY, final String idGenerationSeed) {
    try {
        // ensure the parent group exist
        final ProcessGroup processGroup = flowController.getGroup(groupId);
        if (processGroup == null) {
            throw new IllegalArgumentException("The specified parent process group could not be found");
        }
        // get the existing snippet
        Snippet existingSnippet = getSnippet(snippetId);
        // get the process group
        ProcessGroup existingSnippetProcessGroup = flowController.getGroup(existingSnippet.getParentGroupId());
        // ensure the group could be found
        if (existingSnippetProcessGroup == null) {
            throw new IllegalStateException("The parent process group for the existing snippet could not be found.");
        }
        // generate the snippet contents
        FlowSnippetDTO snippetContents = snippetUtils.populateFlowSnippet(existingSnippet, true, false, false);
        // resolve sensitive properties
        lookupSensitiveProperties(snippetContents);
        // copy snippet
        snippetContents = snippetUtils.copy(snippetContents, processGroup, idGenerationSeed, true);
        // move the snippet if necessary
        if (originX != null && originY != null) {
            org.apache.nifi.util.SnippetUtils.moveSnippet(snippetContents, originX, originY);
        }
        try {
            // instantiate the snippet and return the contents
            flowController.instantiateSnippet(processGroup, snippetContents);
            return snippetContents;
        } catch (IllegalStateException ise) {
            // illegal state will be thrown from instantiateSnippet when there is an issue with the snippet _before_ any of the
            // components are actually created. if we've received this exception we want to attempt to roll back any of the
            // policies that we've already cloned for this request
            snippetUtils.rollbackClonedPolicies(snippetContents);
            // rethrow the same exception
            throw ise;
        }
    } catch (ProcessorInstantiationException pie) {
        throw new NiFiCoreException(String.format("Unable to copy snippet because processor type '%s' is unknown to this NiFi.", StringUtils.substringAfterLast(pie.getMessage(), ".")));
    }
}

Example 28 with FlowSnippetDTO

use of org.apache.nifi.web.api.dto.FlowSnippetDTO in project nifi by apache.

the class SnippetUtils method populateFlowSnippet.

/**
 * Populates the specified snippet and returns the details.
 *
 * @param snippet snippet
 * @param recurse recurse
 * @param includeControllerServices whether or not to include controller services in the flow snippet dto
 * @return snippet
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public FlowSnippetDTO populateFlowSnippet(final Snippet snippet, final boolean recurse, final boolean includeControllerServices, boolean removeInstanceId) {
    final FlowSnippetDTO snippetDto = new FlowSnippetDTO(removeInstanceId);
    final String groupId = snippet.getParentGroupId();
    final ProcessGroup processGroup = flowController.getGroup(groupId);
    // ensure the group could be found
    if (processGroup == null) {
        throw new IllegalStateException("The parent process group for this snippet could not be found.");
    }
    // We need to ensure that the Controller Services that are added get added to the proper group.
    // This can potentially get a little bit tricky. Consider this scenario:
    // We have a Process Group G1. Within Process Group G1 is a Controller Service C1.
    // Also within G1 is a child Process Group, G2. Within G2 is a child Process Group, G3.
    // Within G3 are two child Process Groups: G4 and G5. Within each of these children,
    // we have a Processor (P1, P2) that references the Controller Service C1, defined 3 levels above.
    // Now, we create a template that encompasses only Process Groups G4 and G5. We need to ensure
    // that the Controller Service C1 is included at the 'root' of the template so that those
    // Processors within G4 and G5 both have access to the same Controller Service. This can be drawn
    // out thus:
    // 
    // G1 -- C1
    // |
    // |
    // G2
    // |
    // |
    // G3
    // |  \
    // |   \
    // G4   G5
    // |    |
    // |    |
    // P1   P2
    // 
    // Both P1 and P2 reference C1.
    // 
    // In order to accomplish this, we maintain two collections. First, we keep a Set of all Controller Services that have
    // been added. If we add a new Controller Service to the set, then we know it hasn't been added anywhere in the Snippet.
    // In that case, we determine the service's group ID. In the flow described above, if we template just groups G4 and G5,
    // then we need to include the Controller Service defined at G1. So we also keep a Map of Group ID to controller services
    // in that group. If the ParentGroupId of a Controller Service is not in our snippet, then we instead update the parent
    // ParentGroupId to be that of our highest-level process group (in this case G3, as that's where the template is created)
    // and then add the controller services to that group (NOTE: here, when we say we change the group ID and add to that group,
    // we are talking only about the DTO objects that make up the snippet. We do not actually modify the Process Group or the
    // Controller Services in our flow themselves!)
    final Set<ControllerServiceDTO> allServicesReferenced = new HashSet<>();
    final Map<String, FlowSnippetDTO> contentsByGroup = new HashMap<>();
    contentsByGroup.put(processGroup.getIdentifier(), snippetDto);
    // add any processors
    final Set<ControllerServiceDTO> controllerServices = new HashSet<>();
    final Set<ProcessorDTO> processors = new LinkedHashSet<>();
    if (!snippet.getProcessors().isEmpty()) {
        for (final String processorId : snippet.getProcessors().keySet()) {
            final ProcessorNode processor = processGroup.getProcessor(processorId);
            if (processor == null) {
                throw new IllegalStateException("A processor in this snippet could not be found.");
            }
            processors.add(dtoFactory.createProcessorDto(processor));
            if (includeControllerServices) {
                // Include all referenced services that are not already included in this snippet.
                getControllerServices(processor.getProperties()).stream().filter(svc -> allServicesReferenced.add(svc)).forEach(svc -> {
                    final String svcGroupId = svc.getParentGroupId();
                    final String destinationGroupId = contentsByGroup.containsKey(svcGroupId) ? svcGroupId : processGroup.getIdentifier();
                    svc.setParentGroupId(destinationGroupId);
                    controllerServices.add(svc);
                });
            }
        }
    }
    // add any connections
    final Set<ConnectionDTO> connections = new LinkedHashSet<>();
    if (!snippet.getConnections().isEmpty()) {
        for (final String connectionId : snippet.getConnections().keySet()) {
            final Connection connection = processGroup.getConnection(connectionId);
            if (connection == null) {
                throw new IllegalStateException("A connection in this snippet could not be found.");
            }
            connections.add(dtoFactory.createConnectionDto(connection));
        }
    }
    // add any funnels
    final Set<FunnelDTO> funnels = new LinkedHashSet<>();
    if (!snippet.getFunnels().isEmpty()) {
        for (final String funnelId : snippet.getFunnels().keySet()) {
            final Funnel funnel = processGroup.getFunnel(funnelId);
            if (funnel == null) {
                throw new IllegalStateException("A funnel in this snippet could not be found.");
            }
            funnels.add(dtoFactory.createFunnelDto(funnel));
        }
    }
    // add any input ports
    final Set<PortDTO> inputPorts = new LinkedHashSet<>();
    if (!snippet.getInputPorts().isEmpty()) {
        for (final String inputPortId : snippet.getInputPorts().keySet()) {
            final Port inputPort = processGroup.getInputPort(inputPortId);
            if (inputPort == null) {
                throw new IllegalStateException("An input port in this snippet could not be found.");
            }
            inputPorts.add(dtoFactory.createPortDto(inputPort));
        }
    }
    // add any labels
    final Set<LabelDTO> labels = new LinkedHashSet<>();
    if (!snippet.getLabels().isEmpty()) {
        for (final String labelId : snippet.getLabels().keySet()) {
            final Label label = processGroup.getLabel(labelId);
            if (label == null) {
                throw new IllegalStateException("A label in this snippet could not be found.");
            }
            labels.add(dtoFactory.createLabelDto(label));
        }
    }
    // add any output ports
    final Set<PortDTO> outputPorts = new LinkedHashSet<>();
    if (!snippet.getOutputPorts().isEmpty()) {
        for (final String outputPortId : snippet.getOutputPorts().keySet()) {
            final Port outputPort = processGroup.getOutputPort(outputPortId);
            if (outputPort == null) {
                throw new IllegalStateException("An output port in this snippet could not be found.");
            }
            outputPorts.add(dtoFactory.createPortDto(outputPort));
        }
    }
    // add any process groups
    final Set<ProcessGroupDTO> processGroups = new LinkedHashSet<>();
    if (!snippet.getProcessGroups().isEmpty()) {
        for (final String childGroupId : snippet.getProcessGroups().keySet()) {
            final ProcessGroup childGroup = processGroup.getProcessGroup(childGroupId);
            if (childGroup == null) {
                throw new IllegalStateException("A process group in this snippet could not be found.");
            }
            final ProcessGroupDTO childGroupDto = dtoFactory.createProcessGroupDto(childGroup, recurse);
            processGroups.add(childGroupDto);
            // maintain a listing of visited groups starting with each group in the snippet. this is used to determine
            // whether a referenced controller service should be included in the resulting snippet. if the service is
            // defined at groupId or one of it's ancestors, its considered outside of this snippet and will only be included
            // when the includeControllerServices is set to true. this happens above when considering the processors in this snippet
            final Set<String> visitedGroupIds = new HashSet<>();
            addControllerServices(childGroup, childGroupDto, allServicesReferenced, includeControllerServices, visitedGroupIds, contentsByGroup, processGroup.getIdentifier());
        }
    }
    // add any remote process groups
    final Set<RemoteProcessGroupDTO> remoteProcessGroups = new LinkedHashSet<>();
    if (!snippet.getRemoteProcessGroups().isEmpty()) {
        for (final String remoteProcessGroupId : snippet.getRemoteProcessGroups().keySet()) {
            final RemoteProcessGroup remoteProcessGroup = processGroup.getRemoteProcessGroup(remoteProcessGroupId);
            if (remoteProcessGroup == null) {
                throw new IllegalStateException("A remote process group in this snippet could not be found.");
            }
            remoteProcessGroups.add(dtoFactory.createRemoteProcessGroupDto(remoteProcessGroup));
        }
    }
    // Normalize the coordinates based on the locations of the other components
    final List<? extends ComponentDTO> components = new ArrayList<>();
    components.addAll((Set) processors);
    components.addAll((Set) connections);
    components.addAll((Set) funnels);
    components.addAll((Set) inputPorts);
    components.addAll((Set) labels);
    components.addAll((Set) outputPorts);
    components.addAll((Set) processGroups);
    components.addAll((Set) remoteProcessGroups);
    normalizeCoordinates(components);
    Set<ControllerServiceDTO> updatedControllerServices = snippetDto.getControllerServices();
    if (updatedControllerServices == null) {
        updatedControllerServices = new HashSet<>();
    }
    updatedControllerServices.addAll(controllerServices);
    snippetDto.setControllerServices(updatedControllerServices);
    snippetDto.setProcessors(processors);
    snippetDto.setConnections(connections);
    snippetDto.setFunnels(funnels);
    snippetDto.setInputPorts(inputPorts);
    snippetDto.setLabels(labels);
    snippetDto.setOutputPorts(outputPorts);
    snippetDto.setProcessGroups(processGroups);
    snippetDto.setRemoteProcessGroups(remoteProcessGroups);
    return snippetDto;
}

Example 29 with FlowSnippetDTO

use of org.apache.nifi.web.api.dto.FlowSnippetDTO in project nifi by apache.

the class SnippetUtils method copy.

public FlowSnippetDTO copy(final FlowSnippetDTO snippetContents, final ProcessGroup group, final String idGenerationSeed, boolean isCopy) {
    final FlowSnippetDTO snippetCopy = copyContentsForGroup(snippetContents, group.getIdentifier(), null, null, idGenerationSeed, isCopy);
    resolveNameConflicts(snippetCopy, group);
    return snippetCopy;
}

Example 30 with FlowSnippetDTO

use of org.apache.nifi.web.api.dto.FlowSnippetDTO in project nifi by apache.

the class SnippetUtils method copyContentsForGroup.

private FlowSnippetDTO copyContentsForGroup(final FlowSnippetDTO snippetContents, final String groupId, final Map<String, ConnectableDTO> parentConnectableMap, Map<String, String> serviceIdMap, final String idGenerationSeed, boolean isCopy) {
    final FlowSnippetDTO snippetContentsCopy = new FlowSnippetDTO();
    try {
        // 
        if (serviceIdMap == null) {
            serviceIdMap = new HashMap<>();
        }
        final Set<ControllerServiceDTO> services = new HashSet<>();
        if (snippetContents.getControllerServices() != null) {
            for (final ControllerServiceDTO serviceDTO : snippetContents.getControllerServices()) {
                final ControllerServiceDTO service = dtoFactory.copy(serviceDTO);
                service.setId(generateId(serviceDTO.getId(), idGenerationSeed, isCopy));
                service.setState(ControllerServiceState.DISABLED.name());
                services.add(service);
                // Map old service ID to new service ID so that we can make sure that we reference the new ones.
                serviceIdMap.put(serviceDTO.getId(), service.getId());
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.ControllerService, serviceDTO.getId(), serviceDTO.getName()), ResourceFactory.getComponentResource(ResourceType.ControllerService, service.getId(), service.getName()), idGenerationSeed);
                }
            }
        }
        // if there is any controller service that maps to another controller service, update the id's
        for (final ControllerServiceDTO serviceDTO : services) {
            final Map<String, String> properties = serviceDTO.getProperties();
            final Map<String, PropertyDescriptorDTO> descriptors = serviceDTO.getDescriptors();
            if (properties != null && descriptors != null) {
                for (final PropertyDescriptorDTO descriptor : descriptors.values()) {
                    if (descriptor.getIdentifiesControllerService() != null) {
                        final String currentServiceId = properties.get(descriptor.getName());
                        if (currentServiceId == null) {
                            continue;
                        }
                        final String newServiceId = serviceIdMap.get(currentServiceId);
                        properties.put(descriptor.getName(), newServiceId);
                    }
                }
            }
        }
        snippetContentsCopy.setControllerServices(services);
        // 
        // Copy the labels
        // 
        final Set<LabelDTO> labels = new HashSet<>();
        if (snippetContents.getLabels() != null) {
            for (final LabelDTO labelDTO : snippetContents.getLabels()) {
                final LabelDTO label = dtoFactory.copy(labelDTO);
                label.setId(generateId(labelDTO.getId(), idGenerationSeed, isCopy));
                label.setParentGroupId(groupId);
                labels.add(label);
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.Label, labelDTO.getId(), labelDTO.getLabel()), ResourceFactory.getComponentResource(ResourceType.Label, label.getId(), label.getLabel()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setLabels(labels);
        // 
        // Copy connectable components
        // 
        // maps a group ID-ID of a Connectable in the template to the new instance
        final Map<String, ConnectableDTO> connectableMap = new HashMap<>();
        // 
        // Copy the funnels
        // 
        final Set<FunnelDTO> funnels = new HashSet<>();
        if (snippetContents.getFunnels() != null) {
            for (final FunnelDTO funnelDTO : snippetContents.getFunnels()) {
                final FunnelDTO cp = dtoFactory.copy(funnelDTO);
                cp.setId(generateId(funnelDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                funnels.add(cp);
                connectableMap.put(funnelDTO.getParentGroupId() + "-" + funnelDTO.getId(), dtoFactory.createConnectableDto(cp));
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.Funnel, funnelDTO.getId(), funnelDTO.getId()), ResourceFactory.getComponentResource(ResourceType.Funnel, cp.getId(), cp.getId()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setFunnels(funnels);
        final Set<PortDTO> inputPorts = new HashSet<>();
        if (snippetContents.getInputPorts() != null) {
            for (final PortDTO portDTO : snippetContents.getInputPorts()) {
                final PortDTO cp = dtoFactory.copy(portDTO);
                cp.setId(generateId(portDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                cp.setState(ScheduledState.STOPPED.toString());
                inputPorts.add(cp);
                final ConnectableDTO portConnectable = dtoFactory.createConnectableDto(cp, ConnectableType.INPUT_PORT);
                connectableMap.put(portDTO.getParentGroupId() + "-" + portDTO.getId(), portConnectable);
                if (parentConnectableMap != null) {
                    parentConnectableMap.put(portDTO.getParentGroupId() + "-" + portDTO.getId(), portConnectable);
                }
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.InputPort, portDTO.getId(), portDTO.getName()), ResourceFactory.getComponentResource(ResourceType.InputPort, cp.getId(), cp.getName()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setInputPorts(inputPorts);
        final Set<PortDTO> outputPorts = new HashSet<>();
        if (snippetContents.getOutputPorts() != null) {
            for (final PortDTO portDTO : snippetContents.getOutputPorts()) {
                final PortDTO cp = dtoFactory.copy(portDTO);
                cp.setId(generateId(portDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                cp.setState(ScheduledState.STOPPED.toString());
                outputPorts.add(cp);
                final ConnectableDTO portConnectable = dtoFactory.createConnectableDto(cp, ConnectableType.OUTPUT_PORT);
                connectableMap.put(portDTO.getParentGroupId() + "-" + portDTO.getId(), portConnectable);
                if (parentConnectableMap != null) {
                    parentConnectableMap.put(portDTO.getParentGroupId() + "-" + portDTO.getId(), portConnectable);
                }
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.OutputPort, portDTO.getId(), portDTO.getName()), ResourceFactory.getComponentResource(ResourceType.OutputPort, cp.getId(), cp.getName()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setOutputPorts(outputPorts);
        // 
        // Copy the processors
        // 
        final Set<ProcessorDTO> processors = new HashSet<>();
        if (snippetContents.getProcessors() != null) {
            for (final ProcessorDTO processorDTO : snippetContents.getProcessors()) {
                final ProcessorDTO cp = dtoFactory.copy(processorDTO);
                cp.setId(generateId(processorDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                if (processorDTO.getState() != null && processorDTO.getState().equals(ScheduledState.DISABLED.toString())) {
                    cp.setState(ScheduledState.DISABLED.toString());
                } else {
                    cp.setState(ScheduledState.STOPPED.toString());
                }
                processors.add(cp);
                connectableMap.put(processorDTO.getParentGroupId() + "-" + processorDTO.getId(), dtoFactory.createConnectableDto(cp));
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.Processor, processorDTO.getId(), processorDTO.getName()), ResourceFactory.getComponentResource(ResourceType.Processor, cp.getId(), cp.getName()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setProcessors(processors);
        // if there is any controller service that maps to another controller service, update the id's
        updateControllerServiceIdentifiers(snippetContentsCopy, serviceIdMap);
        // 
        // Copy ProcessGroups
        // 
        // instantiate the process groups, renaming as necessary
        final Set<ProcessGroupDTO> groups = new HashSet<>();
        if (snippetContents.getProcessGroups() != null) {
            for (final ProcessGroupDTO groupDTO : snippetContents.getProcessGroups()) {
                final ProcessGroupDTO cp = dtoFactory.copy(groupDTO, false);
                cp.setId(generateId(groupDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                // copy the contents of this group - we do not copy via the dto factory since we want to specify new ids
                final FlowSnippetDTO contentsCopy = copyContentsForGroup(groupDTO.getContents(), cp.getId(), connectableMap, serviceIdMap, idGenerationSeed, isCopy);
                cp.setContents(contentsCopy);
                groups.add(cp);
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.ProcessGroup, groupDTO.getId(), groupDTO.getName()), ResourceFactory.getComponentResource(ResourceType.ProcessGroup, cp.getId(), cp.getName()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setProcessGroups(groups);
        final Set<RemoteProcessGroupDTO> remoteGroups = new HashSet<>();
        if (snippetContents.getRemoteProcessGroups() != null) {
            for (final RemoteProcessGroupDTO remoteGroupDTO : snippetContents.getRemoteProcessGroups()) {
                final RemoteProcessGroupDTO cp = dtoFactory.copy(remoteGroupDTO);
                cp.setId(generateId(remoteGroupDTO.getId(), idGenerationSeed, isCopy));
                cp.setParentGroupId(groupId);
                final RemoteProcessGroupContentsDTO contents = cp.getContents();
                if (contents != null && contents.getInputPorts() != null) {
                    for (final RemoteProcessGroupPortDTO remotePort : contents.getInputPorts()) {
                        remotePort.setGroupId(cp.getId());
                        final String originalId = remotePort.getId();
                        if (remotePort.getTargetId() == null) {
                            remotePort.setTargetId(originalId);
                        }
                        remotePort.setId(generateId(remotePort.getId(), idGenerationSeed, isCopy));
                        connectableMap.put(remoteGroupDTO.getId() + "-" + originalId, dtoFactory.createConnectableDto(remotePort, ConnectableType.REMOTE_INPUT_PORT));
                    }
                }
                if (contents != null && contents.getOutputPorts() != null) {
                    for (final RemoteProcessGroupPortDTO remotePort : contents.getOutputPorts()) {
                        remotePort.setGroupId(cp.getId());
                        final String originalId = remotePort.getId();
                        if (remotePort.getTargetId() == null) {
                            remotePort.setTargetId(originalId);
                        }
                        remotePort.setId(generateId(remotePort.getId(), idGenerationSeed, isCopy));
                        connectableMap.put(remoteGroupDTO.getId() + "-" + originalId, dtoFactory.createConnectableDto(remotePort, ConnectableType.REMOTE_OUTPUT_PORT));
                    }
                }
                remoteGroups.add(cp);
                // clone policies as appropriate
                if (isCopy) {
                    cloneComponentSpecificPolicies(ResourceFactory.getComponentResource(ResourceType.RemoteProcessGroup, remoteGroupDTO.getId(), remoteGroupDTO.getName()), ResourceFactory.getComponentResource(ResourceType.RemoteProcessGroup, cp.getId(), cp.getName()), idGenerationSeed);
                }
            }
        }
        snippetContentsCopy.setRemoteProcessGroups(remoteGroups);
        final Set<ConnectionDTO> connections = new HashSet<>();
        if (snippetContents.getConnections() != null) {
            for (final ConnectionDTO connectionDTO : snippetContents.getConnections()) {
                final ConnectionDTO cp = dtoFactory.copy(connectionDTO);
                final ConnectableDTO source = connectableMap.get(cp.getSource().getGroupId() + "-" + cp.getSource().getId());
                final ConnectableDTO destination = connectableMap.get(cp.getDestination().getGroupId() + "-" + cp.getDestination().getId());
                // ensure all referenced components are present
                if (source == null || destination == null) {
                    throw new IllegalArgumentException("The flow snippet contains a Connection that references a component that is not included.");
                }
                cp.setId(generateId(connectionDTO.getId(), idGenerationSeed, isCopy));
                cp.setSource(source);
                cp.setDestination(destination);
                cp.setParentGroupId(groupId);
                connections.add(cp);
            // note - no need to copy policies of a connection as their permissions are inferred through the source and destination
            }
        }
        snippetContentsCopy.setConnections(connections);
        return snippetContentsCopy;
    } catch (Exception e) {
        // attempt to role back any policies of the copies that were created in preparation for the clone
        rollbackClonedPolicies(snippetContentsCopy);
        // rethrow the original exception
        throw e;
    }
}