Examples with ResourceNotFoundException org.apache.nifi.web.ResourceNotFoundException used on opensource projects

Example 1 with ResourceNotFoundException

use of org.apache.nifi.web.ResourceNotFoundException in project nifi by apache.

the class VersionsResource method updateFlowVersion.

private VersionControlInformationEntity updateFlowVersion(final String groupId, final ComponentLifecycle componentLifecycle, final URI exampleUri, final Set<AffectedComponentEntity> affectedComponents, final NiFiUser user, final boolean replicateRequest, final Revision revision, final VersionControlInformationEntity requestEntity, final VersionedFlowSnapshot flowSnapshot, final AsynchronousWebRequest<VersionControlInformationEntity> asyncRequest, final String idGenerationSeed, final boolean verifyNotModified, final boolean updateDescendantVersionedFlows) throws LifecycleManagementException, ResumeFlowException {
    // Steps 6-7: Determine which components must be stopped and stop them.
    final Set<String> stoppableReferenceTypes = new HashSet<>();
    stoppableReferenceTypes.add(AffectedComponentDTO.COMPONENT_TYPE_PROCESSOR);
    stoppableReferenceTypes.add(AffectedComponentDTO.COMPONENT_TYPE_REMOTE_INPUT_PORT);
    stoppableReferenceTypes.add(AffectedComponentDTO.COMPONENT_TYPE_REMOTE_OUTPUT_PORT);
    stoppableReferenceTypes.add(AffectedComponentDTO.COMPONENT_TYPE_INPUT_PORT);
    stoppableReferenceTypes.add(AffectedComponentDTO.COMPONENT_TYPE_OUTPUT_PORT);
    final Set<AffectedComponentEntity> runningComponents = affectedComponents.stream().filter(dto -> stoppableReferenceTypes.contains(dto.getComponent().getReferenceType())).filter(dto -> "Running".equalsIgnoreCase(dto.getComponent().getState())).collect(Collectors.toSet());
    logger.info("Stopping {} Processors", runningComponents.size());
    final CancellableTimedPause stopComponentsPause = new CancellableTimedPause(250, Long.MAX_VALUE, TimeUnit.MILLISECONDS);
    asyncRequest.setCancelCallback(stopComponentsPause::cancel);
    componentLifecycle.scheduleComponents(exampleUri, user, groupId, runningComponents, ScheduledState.STOPPED, stopComponentsPause);
    if (asyncRequest.isCancelled()) {
        return null;
    }
    asyncRequest.update(new Date(), "Disabling Affected Controller Services", 20);
    // Steps 8-9. Disable enabled controller services that are affected
    final Set<AffectedComponentEntity> enabledServices = affectedComponents.stream().filter(dto -> AffectedComponentDTO.COMPONENT_TYPE_CONTROLLER_SERVICE.equals(dto.getComponent().getReferenceType())).filter(dto -> "Enabled".equalsIgnoreCase(dto.getComponent().getState())).collect(Collectors.toSet());
    logger.info("Disabling {} Controller Services", enabledServices.size());
    final CancellableTimedPause disableServicesPause = new CancellableTimedPause(250, Long.MAX_VALUE, TimeUnit.MILLISECONDS);
    asyncRequest.setCancelCallback(disableServicesPause::cancel);
    componentLifecycle.activateControllerServices(exampleUri, user, groupId, enabledServices, ControllerServiceState.DISABLED, disableServicesPause);
    if (asyncRequest.isCancelled()) {
        return null;
    }
    asyncRequest.update(new Date(), "Updating Flow", 40);
    logger.info("Updating Process Group with ID {} to version {} of the Versioned Flow", groupId, flowSnapshot.getSnapshotMetadata().getVersion());
    // by replicating a PUT to /nifi-api/versions/process-groups/{groupId}
    try {
        if (replicateRequest) {
            final URI updateUri;
            try {
                updateUri = new URI(exampleUri.getScheme(), exampleUri.getUserInfo(), exampleUri.getHost(), exampleUri.getPort(), "/nifi-api/versions/process-groups/" + groupId, null, exampleUri.getFragment());
            } catch (URISyntaxException e) {
                throw new RuntimeException(e);
            }
            final Map<String, String> headers = new HashMap<>();
            headers.put("content-type", MediaType.APPLICATION_JSON);
            final VersionedFlowSnapshotEntity snapshotEntity = new VersionedFlowSnapshotEntity();
            snapshotEntity.setProcessGroupRevision(dtoFactory.createRevisionDTO(revision));
            snapshotEntity.setRegistryId(requestEntity.getVersionControlInformation().getRegistryId());
            snapshotEntity.setVersionedFlow(flowSnapshot);
            snapshotEntity.setUpdateDescendantVersionedFlows(updateDescendantVersionedFlows);
            final NodeResponse clusterResponse;
            try {
                logger.debug("Replicating PUT request to {} for user {}", updateUri, user);
                if (getReplicationTarget() == ReplicationTarget.CLUSTER_NODES) {
                    clusterResponse = getRequestReplicator().replicate(user, HttpMethod.PUT, updateUri, snapshotEntity, headers).awaitMergedResponse();
                } else {
                    clusterResponse = getRequestReplicator().forwardToCoordinator(getClusterCoordinatorNode(), user, HttpMethod.PUT, updateUri, snapshotEntity, headers).awaitMergedResponse();
                }
            } catch (final InterruptedException ie) {
                logger.warn("Interrupted while replicating PUT request to {} for user {}", updateUri, user);
                Thread.currentThread().interrupt();
                throw new LifecycleManagementException("Interrupted while updating flows across cluster", ie);
            }
            final int updateFlowStatus = clusterResponse.getStatus();
            if (updateFlowStatus != Status.OK.getStatusCode()) {
                final String explanation = getResponseEntity(clusterResponse, String.class);
                logger.error("Failed to update flow across cluster when replicating PUT request to {} for user {}. Received {} response with explanation: {}", updateUri, user, updateFlowStatus, explanation);
                throw new LifecycleManagementException("Failed to update Flow on all nodes in cluster due to " + explanation);
            }
        } else {
            // Step 10: Ensure that if any connection exists in the flow and does not exist in the proposed snapshot,
            // that it has no data in it. Ensure that no Input Port was removed, unless it currently has no incoming connections.
            // Ensure that no Output Port was removed, unless it currently has no outgoing connections.
            serviceFacade.verifyCanUpdate(groupId, flowSnapshot, true, verifyNotModified);
            // Step 11-12. Update Process Group to the new flow and update variable registry with any Variables that were added or removed
            final VersionControlInformationDTO requestVci = requestEntity.getVersionControlInformation();
            final Bucket bucket = flowSnapshot.getBucket();
            final VersionedFlow flow = flowSnapshot.getFlow();
            final VersionedFlowSnapshotMetadata metadata = flowSnapshot.getSnapshotMetadata();
            final VersionControlInformationDTO vci = new VersionControlInformationDTO();
            vci.setBucketId(metadata.getBucketIdentifier());
            vci.setBucketName(bucket.getName());
            vci.setFlowDescription(flow.getDescription());
            vci.setFlowId(flow.getIdentifier());
            vci.setFlowName(flow.getName());
            vci.setGroupId(groupId);
            vci.setRegistryId(requestVci.getRegistryId());
            vci.setRegistryName(serviceFacade.getFlowRegistryName(requestVci.getRegistryId()));
            vci.setVersion(metadata.getVersion());
            vci.setState(flowSnapshot.isLatest() ? VersionedFlowState.UP_TO_DATE.name() : VersionedFlowState.STALE.name());
            serviceFacade.updateProcessGroupContents(user, revision, groupId, vci, flowSnapshot, idGenerationSeed, verifyNotModified, false, updateDescendantVersionedFlows);
        }
    } finally {
        if (!asyncRequest.isCancelled()) {
            if (logger.isDebugEnabled()) {
                logger.debug("Re-Enabling {} Controller Services: {}", enabledServices.size(), enabledServices);
            }
            asyncRequest.update(new Date(), "Re-Enabling Controller Services", 60);
            // Step 13. Re-enable all disabled controller services
            final CancellableTimedPause enableServicesPause = new CancellableTimedPause(250, Long.MAX_VALUE, TimeUnit.MILLISECONDS);
            asyncRequest.setCancelCallback(enableServicesPause::cancel);
            final Set<AffectedComponentEntity> servicesToEnable = getUpdatedEntities(enabledServices, user);
            logger.info("Successfully updated flow; re-enabling {} Controller Services", servicesToEnable.size());
            try {
                componentLifecycle.activateControllerServices(exampleUri, user, groupId, servicesToEnable, ControllerServiceState.ENABLED, enableServicesPause);
            } catch (final IllegalStateException ise) {
                // a more intelligent error message as to exactly what happened, rather than indicate that the flow could not be updated.
                throw new ResumeFlowException("Failed to re-enable Controller Services because " + ise.getMessage(), ise);
            }
        }
        if (!asyncRequest.isCancelled()) {
            if (logger.isDebugEnabled()) {
                logger.debug("Restart {} Processors: {}", runningComponents.size(), runningComponents);
            }
            asyncRequest.update(new Date(), "Restarting Processors", 80);
            // Step 14. Restart all components
            final Set<AffectedComponentEntity> componentsToStart = getUpdatedEntities(runningComponents, user);
            // If there are any Remote Group Ports that are supposed to be started and have no connections, we want to remove those from our Set.
            // This will happen if the Remote Group Port is transmitting when the version change happens but the new flow version does not have
            // a connection to the port. In such a case, the Port still is included in the Updated Entities because we do not remove them
            // when updating the flow (they are removed in the background).
            final Set<AffectedComponentEntity> avoidStarting = new HashSet<>();
            for (final AffectedComponentEntity componentEntity : componentsToStart) {
                final AffectedComponentDTO componentDto = componentEntity.getComponent();
                final String referenceType = componentDto.getReferenceType();
                if (!AffectedComponentDTO.COMPONENT_TYPE_REMOTE_INPUT_PORT.equals(referenceType) && !AffectedComponentDTO.COMPONENT_TYPE_REMOTE_OUTPUT_PORT.equals(referenceType)) {
                    continue;
                }
                boolean startComponent;
                try {
                    startComponent = serviceFacade.isRemoteGroupPortConnected(componentDto.getProcessGroupId(), componentDto.getId());
                } catch (final ResourceNotFoundException rnfe) {
                    // Could occur if RPG is refreshed at just the right time.
                    startComponent = false;
                }
                // rather than removing the component here, because doing so would result in a ConcurrentModificationException.
                if (!startComponent) {
                    avoidStarting.add(componentEntity);
                }
            }
            componentsToStart.removeAll(avoidStarting);
            final CancellableTimedPause startComponentsPause = new CancellableTimedPause(250, Long.MAX_VALUE, TimeUnit.MILLISECONDS);
            asyncRequest.setCancelCallback(startComponentsPause::cancel);
            logger.info("Restarting {} Processors", componentsToStart.size());
            try {
                componentLifecycle.scheduleComponents(exampleUri, user, groupId, componentsToStart, ScheduledState.RUNNING, startComponentsPause);
            } catch (final IllegalStateException ise) {
                // a more intelligent error message as to exactly what happened, rather than indicate that the flow could not be updated.
                throw new ResumeFlowException("Failed to restart components because " + ise.getMessage(), ise);
            }
        }
    }
    asyncRequest.setCancelCallback(null);
    if (asyncRequest.isCancelled()) {
        return null;
    }
    asyncRequest.update(new Date(), "Complete", 100);
    return serviceFacade.getVersionControlInformation(groupId);
}

Example 2 with ResourceNotFoundException

use of org.apache.nifi.web.ResourceNotFoundException in project nifi by apache.

the class FlowResource method getComponentHistory.

/**
 * Gets the actions for the specified component.
 *
 * @param componentId The id of the component.
 * @return An processorHistoryEntity.
 */
@GET
@Consumes(MediaType.WILDCARD)
@Produces(MediaType.APPLICATION_JSON)
@Path("history/components/{componentId}")
@ApiOperation(value = "Gets configuration history for a component", notes = NON_GUARANTEED_ENDPOINT, response = ComponentHistoryEntity.class, authorizations = { @Authorization(value = "Read - /flow"), @Authorization(value = "Read underlying component - /{component-type}/{uuid}") })
@ApiResponses(value = { @ApiResponse(code = 400, message = "NiFi was unable to complete the request because it was invalid. The request should not be retried without modification."), @ApiResponse(code = 401, message = "Client could not be authenticated."), @ApiResponse(code = 403, message = "Client is not authorized to make this request."), @ApiResponse(code = 404, message = "The specified resource could not be found."), @ApiResponse(code = 409, message = "The request was valid but NiFi was not in the appropriate state to process it. Retrying the same request later may be successful.") })
public Response getComponentHistory(@ApiParam(value = "The component id.", required = true) @PathParam("componentId") final String componentId) {
    serviceFacade.authorizeAccess(lookup -> {
        final NiFiUser user = NiFiUserUtils.getNiFiUser();
        // authorize the flow
        authorizeFlow();
        try {
            final Authorizable authorizable = lookup.getProcessor(componentId).getAuthorizable();
            authorizable.authorize(authorizer, RequestAction.READ, user);
            return;
        } catch (final ResourceNotFoundException e) {
        // ignore as the component may not be a processor
        }
        try {
            final Authorizable authorizable = lookup.getControllerService(componentId).getAuthorizable();
            authorizable.authorize(authorizer, RequestAction.READ, user);
            return;
        } catch (final ResourceNotFoundException e) {
        // ignore as the component may not be a controller service
        }
        try {
            final Authorizable authorizable = lookup.getReportingTask(componentId).getAuthorizable();
            authorizable.authorize(authorizer, RequestAction.READ, user);
            return;
        } catch (final ResourceNotFoundException e) {
        // ignore as the component may not be a reporting task
        }
        // a component for the specified id could not be found, attempt to authorize based on read to the controller
        final Authorizable controller = lookup.getController();
        controller.authorize(authorizer, RequestAction.READ, user);
    });
    // Note: History requests are not replicated throughout the cluster and are instead handled by the nodes independently
    // create the response entity
    final ComponentHistoryEntity entity = new ComponentHistoryEntity();
    entity.setComponentHistory(serviceFacade.getComponentHistory(componentId));
    // generate the response
    return generateOkResponse(entity).build();
}

Example 3 with ResourceNotFoundException

use of org.apache.nifi.web.ResourceNotFoundException in project nifi by apache.

the class ProcessGroupResource method deleteVariableRegistryUpdateRequest.

@DELETE
@Consumes(MediaType.WILDCARD)
@Produces(MediaType.APPLICATION_JSON)
@Path("{groupId}/variable-registry/update-requests/{updateId}")
@ApiOperation(value = "Deletes an update request for a process group's variable registry. If the request is not yet complete, it will automatically be cancelled.", response = VariableRegistryUpdateRequestEntity.class, notes = NON_GUARANTEED_ENDPOINT, authorizations = { @Authorization(value = "Read - /process-groups/{uuid}") })
@ApiResponses(value = { @ApiResponse(code = 400, message = "NiFi was unable to complete the request because it was invalid. The request should not be retried without modification."), @ApiResponse(code = 401, message = "Client could not be authenticated."), @ApiResponse(code = 403, message = "Client is not authorized to make this request."), @ApiResponse(code = 404, message = "The specified resource could not be found."), @ApiResponse(code = 409, message = "The request was valid but NiFi was not in the appropriate state to process it. Retrying the same request later may be successful.") })
public Response deleteVariableRegistryUpdateRequest(@ApiParam(value = "The process group id.", required = true) @PathParam("groupId") final String groupId, @ApiParam(value = "The ID of the Variable Registry Update Request", required = true) @PathParam("updateId") final String updateId) {
    if (groupId == null || updateId == null) {
        throw new IllegalArgumentException("Group ID and Update ID must both be specified.");
    }
    final NiFiUser user = NiFiUserUtils.getNiFiUser();
    // authorize access
    serviceFacade.authorizeAccess(lookup -> {
        final Authorizable processGroup = lookup.getProcessGroup(groupId).getAuthorizable();
        processGroup.authorize(authorizer, RequestAction.READ, user);
        processGroup.authorize(authorizer, RequestAction.WRITE, user);
    });
    final VariableRegistryUpdateRequest request = varRegistryUpdateRequests.remove(updateId);
    if (request == null) {
        throw new ResourceNotFoundException("Could not find a Variable Registry Update Request with identifier " + updateId);
    }
    if (!groupId.equals(request.getProcessGroupId())) {
        throw new ResourceNotFoundException("Could not find a Variable Registry Update Request with identifier " + updateId + " for Process Group with identifier " + groupId);
    }
    if (!user.equals(request.getUser())) {
        throw new IllegalArgumentException("Only the user that submitted the update request can remove it.");
    }
    request.cancel();
    final VariableRegistryUpdateRequestEntity entity = new VariableRegistryUpdateRequestEntity();
    entity.setRequest(dtoFactory.createVariableRegistryUpdateRequestDto(request));
    entity.setProcessGroupRevision(request.getProcessGroupRevision());
    entity.getRequest().setUri(generateResourceUri("process-groups", groupId, "variable-registry", updateId));
    return generateOkResponse(entity).build();
}

Example 4 with ResourceNotFoundException

use of org.apache.nifi.web.ResourceNotFoundException in project nifi by apache.

the class ProcessGroupResource method getVariableRegistryUpdateRequest.

@GET
@Consumes(MediaType.WILDCARD)
@Produces(MediaType.APPLICATION_JSON)
@Path("{groupId}/variable-registry/update-requests/{updateId}")
@ApiOperation(value = "Gets a process group's variable registry", response = VariableRegistryUpdateRequestEntity.class, notes = NON_GUARANTEED_ENDPOINT, authorizations = { @Authorization(value = "Read - /process-groups/{uuid}") })
@ApiResponses(value = { @ApiResponse(code = 400, message = "NiFi was unable to complete the request because it was invalid. The request should not be retried without modification."), @ApiResponse(code = 401, message = "Client could not be authenticated."), @ApiResponse(code = 403, message = "Client is not authorized to make this request."), @ApiResponse(code = 404, message = "The specified resource could not be found."), @ApiResponse(code = 409, message = "The request was valid but NiFi was not in the appropriate state to process it. Retrying the same request later may be successful.") })
public Response getVariableRegistryUpdateRequest(@ApiParam(value = "The process group id.", required = true) @PathParam("groupId") final String groupId, @ApiParam(value = "The ID of the Variable Registry Update Request", required = true) @PathParam("updateId") final String updateId) {
    if (groupId == null || updateId == null) {
        throw new IllegalArgumentException("Group ID and Update ID must both be specified.");
    }
    final NiFiUser user = NiFiUserUtils.getNiFiUser();
    // authorize access
    serviceFacade.authorizeAccess(lookup -> {
        final Authorizable processGroup = lookup.getProcessGroup(groupId).getAuthorizable();
        processGroup.authorize(authorizer, RequestAction.READ, user);
    });
    final VariableRegistryUpdateRequest request = varRegistryUpdateRequests.get(updateId);
    if (request == null) {
        throw new ResourceNotFoundException("Could not find a Variable Registry Update Request with identifier " + updateId);
    }
    if (!groupId.equals(request.getProcessGroupId())) {
        throw new ResourceNotFoundException("Could not find a Variable Registry Update Request with identifier " + updateId + " for Process Group with identifier " + groupId);
    }
    if (!user.equals(request.getUser())) {
        throw new IllegalArgumentException("Only the user that submitted the update request can retrieve it.");
    }
    final VariableRegistryUpdateRequestEntity entity = new VariableRegistryUpdateRequestEntity();
    entity.setRequest(dtoFactory.createVariableRegistryUpdateRequestDto(request));
    entity.setProcessGroupRevision(request.getProcessGroupRevision());
    entity.getRequest().setUri(generateResourceUri("process-groups", groupId, "variable-registry", updateId));
    return generateOkResponse(entity).build();
}

Example 5 with ResourceNotFoundException

use of org.apache.nifi.web.ResourceNotFoundException in project nifi by apache.

the class ProcessGroupResource method createConnection.

// -----------
// connections
// -----------
/**
 * Creates a new connection.
 *
 * @param httpServletRequest request
 * @param groupId            The group id
 * @param requestConnectionEntity   A connectionEntity.
 * @return A connectionEntity.
 */
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@Path("{id}/connections")
@ApiOperation(value = "Creates a connection", response = ConnectionEntity.class, authorizations = { @Authorization(value = "Write - /process-groups/{uuid}"), @Authorization(value = "Write Source - /{component-type}/{uuid}"), @Authorization(value = "Write Destination - /{component-type}/{uuid}") })
@ApiResponses(value = { @ApiResponse(code = 400, message = "NiFi was unable to complete the request because it was invalid. The request should not be retried without modification."), @ApiResponse(code = 401, message = "Client could not be authenticated."), @ApiResponse(code = 403, message = "Client is not authorized to make this request."), @ApiResponse(code = 404, message = "The specified resource could not be found."), @ApiResponse(code = 409, message = "The request was valid but NiFi was not in the appropriate state to process it. Retrying the same request later may be successful.") })
public Response createConnection(@Context final HttpServletRequest httpServletRequest, @ApiParam(value = "The process group id.", required = true) @PathParam("id") final String groupId, @ApiParam(value = "The connection configuration details.", required = true) final ConnectionEntity requestConnectionEntity) {
    if (requestConnectionEntity == null || requestConnectionEntity.getComponent() == null) {
        throw new IllegalArgumentException("Connection details must be specified.");
    }
    if (requestConnectionEntity.getRevision() == null || (requestConnectionEntity.getRevision().getVersion() == null || requestConnectionEntity.getRevision().getVersion() != 0)) {
        throw new IllegalArgumentException("A revision of 0 must be specified when creating a new Connection.");
    }
    if (requestConnectionEntity.getComponent().getId() != null) {
        throw new IllegalArgumentException("Connection ID cannot be specified.");
    }
    final List<PositionDTO> proposedBends = requestConnectionEntity.getComponent().getBends();
    if (proposedBends != null) {
        for (final PositionDTO proposedBend : proposedBends) {
            if (proposedBend.getX() == null || proposedBend.getY() == null) {
                throw new IllegalArgumentException("The x and y coordinate of the each bend must be specified.");
            }
        }
    }
    if (requestConnectionEntity.getComponent().getParentGroupId() != null && !groupId.equals(requestConnectionEntity.getComponent().getParentGroupId())) {
        throw new IllegalArgumentException(String.format("If specified, the parent process group id %s must be the same as specified in the URI %s", requestConnectionEntity.getComponent().getParentGroupId(), groupId));
    }
    requestConnectionEntity.getComponent().setParentGroupId(groupId);
    // get the connection
    final ConnectionDTO requestConnection = requestConnectionEntity.getComponent();
    if (requestConnection.getSource() == null || requestConnection.getSource().getId() == null) {
        throw new IllegalArgumentException("The source of the connection must be specified.");
    }
    if (requestConnection.getSource().getType() == null) {
        throw new IllegalArgumentException("The type of the source of the connection must be specified.");
    }
    final ConnectableType sourceConnectableType;
    try {
        sourceConnectableType = ConnectableType.valueOf(requestConnection.getSource().getType());
    } catch (final IllegalArgumentException e) {
        throw new IllegalArgumentException(String.format("Unrecognized source type %s. Expected values are [%s]", requestConnection.getSource().getType(), StringUtils.join(ConnectableType.values(), ", ")));
    }
    if (requestConnection.getDestination() == null || requestConnection.getDestination().getId() == null) {
        throw new IllegalArgumentException("The destination of the connection must be specified.");
    }
    if (requestConnection.getDestination().getType() == null) {
        throw new IllegalArgumentException("The type of the destination of the connection must be specified.");
    }
    final ConnectableType destinationConnectableType;
    try {
        destinationConnectableType = ConnectableType.valueOf(requestConnection.getDestination().getType());
    } catch (final IllegalArgumentException e) {
        throw new IllegalArgumentException(String.format("Unrecognized destination type %s. Expected values are [%s]", requestConnection.getDestination().getType(), StringUtils.join(ConnectableType.values(), ", ")));
    }
    if (isReplicateRequest()) {
        return replicate(HttpMethod.POST, requestConnectionEntity);
    }
    return withWriteLock(serviceFacade, requestConnectionEntity, lookup -> {
        // ensure write access to the group
        final Authorizable processGroup = lookup.getProcessGroup(groupId).getAuthorizable();
        processGroup.authorize(authorizer, RequestAction.WRITE, NiFiUserUtils.getNiFiUser());
        // explicitly handle RPGs differently as the connectable id can be ambiguous if self referencing
        final Authorizable source;
        if (ConnectableType.REMOTE_OUTPUT_PORT.equals(sourceConnectableType)) {
            source = lookup.getRemoteProcessGroup(requestConnection.getSource().getGroupId());
        } else {
            source = lookup.getLocalConnectable(requestConnection.getSource().getId());
        }
        // ensure write access to the source
        if (source == null) {
            throw new ResourceNotFoundException("Cannot find source component with ID [" + requestConnection.getSource().getId() + "]");
        }
        source.authorize(authorizer, RequestAction.WRITE, NiFiUserUtils.getNiFiUser());
        // explicitly handle RPGs differently as the connectable id can be ambiguous if self referencing
        final Authorizable destination;
        if (ConnectableType.REMOTE_INPUT_PORT.equals(destinationConnectableType)) {
            destination = lookup.getRemoteProcessGroup(requestConnection.getDestination().getGroupId());
        } else {
            destination = lookup.getLocalConnectable(requestConnection.getDestination().getId());
        }
        // ensure write access to the destination
        if (destination == null) {
            throw new ResourceNotFoundException("Cannot find destination component with ID [" + requestConnection.getDestination().getId() + "]");
        }
        destination.authorize(authorizer, RequestAction.WRITE, NiFiUserUtils.getNiFiUser());
    }, () -> serviceFacade.verifyCreateConnection(groupId, requestConnection), connectionEntity -> {
        final ConnectionDTO connection = connectionEntity.getComponent();
        // set the processor id as appropriate
        connection.setId(generateUuid());
        // create the new relationship target
        final Revision revision = getRevision(connectionEntity, connection.getId());
        final ConnectionEntity entity = serviceFacade.createConnection(revision, groupId, connection);
        connectionResource.populateRemainingConnectionEntityContent(entity);
        // extract the href and build the response
        String uri = entity.getUri();
        return generateCreatedResponse(URI.create(uri), entity).build();
    });
}