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Relay service should be an adapter. #216

Description

@MRIIOT

An adapter in the current context of Ladder99 is nothing more than a component with a source, a sink, and transformational logic revolving around a cache instance driven by input.yaml and output.yaml.

Current Relay specialization:

  • querying MTConnect Agent endpoint (HTTP XML)
  • writing to a database (SQL).

Current Relay responsibilities:

  • database migration/upgrade
  • transform MTConnect XML representation to sql
  • transferring MTConnect structure to db
  • writing DataItems to db

Future Relay specialization as a MTConnect adapter:

  • querying MTConnect Agent endpoint (HTTP XML)
  • sink?

Future Relay responsibilities as a MTConnect adapter:

  • transform MTConnect XML representation to ?

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