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User Score Computation
// Spark : Train the model and save features, weights in PMML format
saveModelToS3(model.toPMML(), // PMML string
"miles_away_from_store", // Feature names
"trips_past_year",
"rewards_card_holder",
"lives_in_rural_area")
// Inside user-scoring microservice : Compute the user score
features = Map("miles_away_from_store" -> miles_away_from_store,
"card_holder" -> card_holder,
"lives_in_rural_area" -> lives_in_rural_area,
"trips_past_year" -> trips_past_year)
user_score = modelEvaluator.evaluate(features)
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