jina.serve.runtimes.gateway.graph.topology_graph module

class jina.serve.runtimes.gateway.graph.topology_graph.TopologyGraph(graph_representation, \args, **kwargs*)[source]

Bases: object

• :class TopologyGraph is a class that describes a computational graph of nodes, where each node represents

  a Deployment that needs to be sent requests in the order respecting the path traversal.

• Parameters

  graph_description – A dictionary describing the topology of the Deployments. 2 special nodes are expected, the name start-gateway and end-gateway to determine the nodes that receive the very first request and the ones whose response needs to be sent back to the client. All the nodes with no outgoing nodes will be considered to be hanging, and they will be “flagged” so that the user can ignore their tasks and not await them.

• add_routes(request)[source]

  Add routes to the DataRequest based on the state of request processing

  • Parameters

    request (DataRequest) – the request to add the routes to

    Returns

    modified request with added routes

• property origin_nodes

  The list of origin nodes, the one that depend only on the gateway, so all the subgraphs will be born from them and they will send to their deployments the request as received by the client.

  • Returns

    A list of nodes