Use GetPersonalizedRanking with an Amazon SDK

    public static List<PredictedItem> getRankedRecs(PersonalizeRuntimeClient personalizeRuntimeClient,
            String campaignArn,
            String userId,
            ArrayList<String> items) {

        try {
            GetPersonalizedRankingRequest rankingRecommendationsRequest = GetPersonalizedRankingRequest.builder()
                    .campaignArn(campaignArn)
                    .userId(userId)
                    .inputList(items)
                    .build();

            GetPersonalizedRankingResponse recommendationsResponse = personalizeRuntimeClient
                    .getPersonalizedRanking(rankingRecommendationsRequest);
            List<PredictedItem> rankedItems = recommendationsResponse.personalizedRanking();
            int rank = 1;
            for (PredictedItem item : rankedItems) {
                System.out.println("Item ranked at position " + rank + " details");
                System.out.println("Item Id is : " + item.itemId());
                System.out.println("Item score is : " + item.score());
                System.out.println("---------------------------------------------");
                rank++;
            }
            return rankedItems;
        } catch (PersonalizeRuntimeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return null;
    }

// Get service clients module and commands using ES6 syntax.
import { GetPersonalizedRankingCommand } from "@aws-sdk/client-personalize-runtime";
import { personalizeRuntimeClient } from "./libs/personalizeClients.js";
// Or, create the client here.
// const personalizeRuntimeClient = new PersonalizeRuntimeClient({ region: "REGION"});

// Set the ranking request parameters.
export const getPersonalizedRankingParam = {
  campaignArn: "CAMPAIGN_ARN" /* required */,
  userId: "USER_ID" /* required */,
  inputList: ["ITEM_ID_1", "ITEM_ID_2", "ITEM_ID_3", "ITEM_ID_4"],
};

export const run = async () => {
  try {
    const response = await personalizeRuntimeClient.send(
      new GetPersonalizedRankingCommand(getPersonalizedRankingParam),
    );
    console.log("Success!", response);
    return response; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
run();