session, DependencyResolverRequest.RequestType.FLATTEN, project, scope));
    }

    @Nonnull
    default DependencyResolverResult flatten(@Nonnull DependencyResolverRequest request) {
        if (request.getRequestType() != DependencyResolverRequest.RequestType.FLATTEN) {
            throw new IllegalArgumentException("requestType should be FLATTEN when calling flatten()");
        }

        return new DependencyResolverRequestBuilder()
                .session(session)
                .requestType(requestType)
                .project(project)
                .pathScope(scope)
                .build();
    }

    @Nonnull
    static DependencyResolverRequest build(Session session, RequestType requestType, DependencyCoordinates dependency) {

        public ModelBuilderRequestBuilder trace(RequestTrace trace) {
            this.trace = trace;
            return this;
        }

        public ModelBuilderRequestBuilder requestType(RequestType requestType) {
            this.requestType = requestType;
            return this;
        }

        public ModelBuilderRequestBuilder locationTracking(boolean locationTracking) {
            this.locationTracking = locationTracking;

            throws MetadataResolutionException, GraphConflictResolutionException {
        if (requestType == null) {
            return null;
        }

        if (treeRoot == null) {
            return null;
        }

        if (conflictResolver == null) {
            return null;
        }

     */
    public void setRequestType(final int requestType) {
        switch (requestType) {
            case REQUEST_PUT:
                break;
            case REQUEST_GET:
                break;
            default:
                throw new IllegalArgumentException("Illegal request type: " + requestType);
        }

        this.requestType = requestType;
    }

    /**

    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();

        DependencyResolverRequest request1 = builder.session(session)
                .requestType(DependencyResolverRequest.RequestType.COLLECT)
                .pathScope(PathScope.MAIN_COMPILE)
                .build();

        DependencyResolverRequest request2 = builder.session(session)
                .requestType(DependencyResolverRequest.RequestType.COLLECT)
                .pathScope(PathScope.MAIN_COMPILE)
                .build();

    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        MessageBuilder message = messageBuilderFactory.builder();

    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();

    /**
     * Type of RDMA work request
     */
    public enum RequestType {
        /** Send operation */
        SEND,
        /** Receive operation */
        RECEIVE,
        /** RDMA read operation */
        READ,
        /** RDMA write operation */
        WRITE
    }

    private final long requestId;
    private final RequestType type;
    private final RdmaMemoryRegion memoryRegion;