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Modify topology connection

As outlined in the value awareness architecture, the data and control flow of messages are exchanged by the VALAWAi components, as described by a topology that will be managed by the Master Of VALAWAI (MOV). In the previous section, we described the services to create connections (see section create connection) and search for connections (see section Connection query). The remaining service is the capability of the C2 components to enable, disable, or remove these connections. For this purpose, the C2 component must be sent to the queue valawai/topology/change a message with the following payload:

  • action: Specify the modification to be performed on the connection. The possible actions are: ENABLE, DISABLE, or REMOVE.
  • connection_id: The identifier of the topology connection to change.

The MOV enables a topology connection by subscribing to the source channel and publishing the received messages on the target channel. Conversely, when disabling the connection, it unsubscribes from the source channel. Finally, if the topology connection is also enabled before marking it as deleted in the database, the MOV will continue to publish messages on the target channel.

The following JSON demonstrates an example of the message payload to modify a topology connection:

{
  "action": "ENABLE",
  "connection_id": "65c1f59ea4cb169f42f5edc4"
}