vcTransportSolution

Transport solution is a single route from one transport node (vcTransportNode) to another transport node without any branches or loops. The transport solutions are enforced to be valid when they are created or modified. The solution consists of an ordered list of transport link references (vcTransportLink), starting from the Source node and ending to the Destination node.

Note: A valid transport solution conforms to these rules:

 • Transport solution can be empty i.e. contain no links. Using empty solutions is not recommended. Set the vcProduct.TransportSolution to None instead.

 • Each transport link’s Source node is the same as the previous link’s Destination node (must form a continuous one-directional path)

 • No two links have the same Source node (cannot contain branches)

 • No two links have the same Destination node (cannot contain joins or loops)

 • The Source and Destination nodes of the whole solution cannot be the same (cannot be a loop).

Properties

Name	Type	Access	Description
Source	vcTransportNode	R	The transport node this route starts from. Returns None if the solution is empty.
Destination	vcTransportNode	R	The transport node this route ends to. Returns None if the solution is empty.
Links	List of vcTransportLink	R	The list of transport links that need to be travelled to get from the Source node to the Destination node, starting from Source.

Methods

Name	Return Type	Parameters	Description
getNextLink	vcTransportLink	vcTransportNode node	Returns the transport link (there can be only one) that has the given transport node as its Source. Returns None if such link doesn’t exist in the solution i.e. the route doesn’t start from or pass through that transport node.
replaceLinks	None	List of vcTransportLink links	Replaces the route with given links. If the given links do not form a valid transport solution, an error is raised and the previous route is preserved.

Events

Name	Parameters	Description
OnSolutionInvalidated	vcTransportSolution solution	Triggered when any of the transport links in this solution has been deleted from the transport system, which would make the solution either invalid or change its ends. Note: All transport links are removed from the solution before this event is triggered. The solution parameter is always this transport solution instance.

Examples

Example. Event handler when a product arrives to node.

from vcScript import * sim = getSimulation() process_controller = sim.ProcessController transport_system = process_controller.TransportSystem nodes = transport_system.Nodes node = nodes[1] # Event handler when a product arrives to node def product_arrived_handler(product, link, event_data):   print product.ProductType.Name, 'arrived to', link.Destination.Parent.Name      source_name = product.TransportSolution.Source.Parent.Name   destination_name = product.TransportSolution.Destination.Parent.Name   print 'The products current Transport Solution is from', source_name, 'to', destination_name      next_link = product.TransportSolution.getNextLink(node)   if next_link:     print 'The next Transport Link for this Transport Solution is', next_link   else:     print 'This Transport Solution does not have any more links' node.OnProductArriving = product_arrived_handler