入門 （適用於 Java 2.x 的 SDK)

將下列相依性新增至您的 pom.xml 檔案。最新版本號碼可能與範例程式碼不同。

<dependency>
	<groupId>software.amazon.awssdk</groupId>
	<artifactId>personalize</artifactId>
	<version>2.16.83</version>
</dependency>
<dependency>
	<groupId>software.amazon.awssdk</groupId>
	<artifactId>personalizeruntime</artifactId>
	<version>2.16.83</version>
</dependency>
<dependency>
	<groupId>software.amazon.awssdk</groupId>
	<artifactId>personalizeevents</artifactId>
	<version>2.16.83</version>
</dependency>

將下列匯入陳述式新增至您的專案。

// import client packages
import software.amazon.awssdk.services.personalize.PersonalizeClient;
import software.amazon.awssdk.services.personalizeruntime.PersonalizeRuntimeClient;
// Amazon Personalize exception package
import software.amazon.awssdk.services.personalize.model.PersonalizeException;
// schema packages
import software.amazon.awssdk.services.personalize.model.CreateSchemaRequest;
// dataset group packages
import software.amazon.awssdk.services.personalize.model.CreateDatasetGroupRequest;
import software.amazon.awssdk.services.personalize.model.DescribeDatasetGroupRequest;
// dataset packages
import software.amazon.awssdk.services.personalize.model.CreateDatasetRequest;
// dataset import job packages
import software.amazon.awssdk.services.personalize.model.CreateDatasetImportJobRequest;
import software.amazon.awssdk.services.personalize.model.DataSource;
import software.amazon.awssdk.services.personalize.model.DatasetImportJob;
import software.amazon.awssdk.services.personalize.model.DescribeDatasetImportJobRequest;
// solution packages
import software.amazon.awssdk.services.personalize.model.CreateSolutionRequest;
import software.amazon.awssdk.services.personalize.model.CreateSolutionResponse;
// solution version packages
import software.amazon.awssdk.services.personalize.model.DescribeSolutionRequest;
import software.amazon.awssdk.services.personalize.model.CreateSolutionVersionRequest;
import software.amazon.awssdk.services.personalize.model.CreateSolutionVersionResponse;
import software.amazon.awssdk.services.personalize.model.DescribeSolutionVersionRequest;
// campaign packages
import software.amazon.awssdk.services.personalize.model.CreateCampaignRequest;
import software.amazon.awssdk.services.personalize.model.CreateCampaignResponse;
// get recommendations packages
import software.amazon.awssdk.services.personalizeruntime.model.GetRecommendationsRequest;
import software.amazon.awssdk.services.personalizeruntime.model.GetRecommendationsResponse;
import software.amazon.awssdk.services.personalizeruntime.model.PredictedItem;
// Java time utility package
import java.time.Instant; 

將下列 Avro 結構描述儲存為工作目錄中的 JSON 檔案。此結構描述與您完成 時建立的 CSV 檔案中的資料欄相符入門先決條件。

{
  "type": "record",
  "name": "Interactions",
  "namespace": "com.amazonaws.personalize.schema",
  "fields": [
      {
          "name": "USER_ID",
          "type": "string"
      },
      {
          "name": "ITEM_ID",
          "type": "string"
      },
      {
          "name": "TIMESTAMP",
          "type": "long"
      }
  ],
  "version": "1.0"
}

使用下列createSchema方法在 Amazon Personalize 中建立結構描述。傳遞下列參數：Amazon Personalize 服務用戶端、結構描述的名稱，以及您在上一個步驟中建立之結構描述 JSON 檔案的檔案路徑。方法會傳回新結構描述的 Amazon Resource Name (ARN)。存放它以供日後使用。

    public static String createSchema(PersonalizeClient personalizeClient, String schemaName, String filePath) {

        String schema = null;
        try {
            schema = new String(Files.readAllBytes(Paths.get(filePath)));
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }

        try {
            CreateSchemaRequest createSchemaRequest = CreateSchemaRequest.builder()
                    .name(schemaName)
                    .schema(schema)
                    .build();

            String schemaArn = personalizeClient.createSchema(createSchemaRequest).schemaArn();

            System.out.println("Schema arn: " + schemaArn);

            return schemaArn;

        } catch (PersonalizeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

建立資料集群組。使用下列createDatasetGroup方法建立資料集群組。以參數形式傳遞下列項目：Amazon Personalize 服務用戶端和資料集群組的名稱。方法會傳回新資料集群組的 ARN。存放它以供日後使用。

    public static String createDatasetGroup(PersonalizeClient personalizeClient, String datasetGroupName) {

        try {
            CreateDatasetGroupRequest createDatasetGroupRequest = CreateDatasetGroupRequest.builder()
                    .name(datasetGroupName)
                    .build();
            return personalizeClient.createDatasetGroup(createDatasetGroupRequest).datasetGroupArn();
        } catch (PersonalizeException e) {
            System.out.println(e.awsErrorDetails().errorMessage());
        }
        return "";
    }

建立項目互動資料集。使用下列createDataset方法建立項目互動資料集。將下列項目做為參數傳遞：Amazon Personalize 服務用戶端、資料集的名稱、結構描述的 ARN、資料集群組的 ARN，以及Interactions資料集的類型。方法會傳回新資料集的 ARN。存放它以供日後使用。

    public static String createDataset(PersonalizeClient personalizeClient,
            String datasetName,
            String datasetGroupArn,
            String datasetType,
            String schemaArn) {
        try {
            CreateDatasetRequest request = CreateDatasetRequest.builder()
                    .name(datasetName)
                    .datasetGroupArn(datasetGroupArn)
                    .datasetType(datasetType)
                    .schemaArn(schemaArn)
                    .build();

            String datasetArn = personalizeClient.createDataset(request)
                    .datasetArn();
            System.out.println("Dataset " + datasetName + " created.");
            return datasetArn;

        } catch (PersonalizeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

使用資料集匯入任務匯入您的資料。使用下列createPersonalizeDatasetImportJob方法建立資料集匯入任務。

將下列內容做為參數傳遞：Amazon Personalize 服務用戶端、任務的名稱、項目互動資料集的 ARN、存放訓練資料的 Amazon S3 儲存貯體路徑 (s3://bucket name/folder name/ratings.csv)，以及服務角色的 ARN （您將此角色建立為 的一部分入門先決條件)。方法會傳回資料集匯入任務的 ARN。選擇性地存放以供日後使用。

    public static String createPersonalizeDatasetImportJob(PersonalizeClient personalizeClient,
            String jobName,
            String datasetArn,
            String s3BucketPath,
            String roleArn) {

        long waitInMilliseconds = 60 * 1000;
        String status;
        String datasetImportJobArn;

        try {
            DataSource importDataSource = DataSource.builder()
                    .dataLocation(s3BucketPath)
                    .build();

            CreateDatasetImportJobRequest createDatasetImportJobRequest = CreateDatasetImportJobRequest.builder()
                    .datasetArn(datasetArn)
                    .dataSource(importDataSource)
                    .jobName(jobName)
                    .roleArn(roleArn)
                    .build();

            datasetImportJobArn = personalizeClient.createDatasetImportJob(createDatasetImportJobRequest)
                    .datasetImportJobArn();
            DescribeDatasetImportJobRequest describeDatasetImportJobRequest = DescribeDatasetImportJobRequest.builder()
                    .datasetImportJobArn(datasetImportJobArn)
                    .build();

            long maxTime = Instant.now().getEpochSecond() + 3 * 60 * 60;

            while (Instant.now().getEpochSecond() < maxTime) {

                DatasetImportJob datasetImportJob = personalizeClient
                        .describeDatasetImportJob(describeDatasetImportJobRequest)
                        .datasetImportJob();

                status = datasetImportJob.status();
                System.out.println("Dataset import job status: " + status);

                if (status.equals("ACTIVE") || status.equals("CREATE FAILED")) {
                    break;
                }
                try {
                    Thread.sleep(waitInMilliseconds);
                } catch (InterruptedException e) {
                    System.out.println(e.getMessage());
                }
            }
            return datasetImportJobArn;

        } catch (PersonalizeException e) {
            System.out.println(e.awsErrorDetails().errorMessage());
        }
        return "";
    }

使用下列createPersonalizeSolution方法建立新的解決方案。將以下內容做為參數傳遞：Amazon Personalize 服務用戶端、您的資料集群組 Amazon Resource Name (ARN)、解決方案的名稱，以及 User-Personalization-v2 配方的 ARN (arn:aws:personalize:::recipe/aws-user-personalization-v2)。方法會傳回您新解決方案的 ARN。存放它以供日後使用。

    public static String createPersonalizeSolution(PersonalizeClient personalizeClient,
            String datasetGroupArn,
            String solutionName,
            String recipeArn) {

        try {
            CreateSolutionRequest solutionRequest = CreateSolutionRequest.builder()
                    .name(solutionName)
                    .datasetGroupArn(datasetGroupArn)
                    .recipeArn(recipeArn)
                    .build();

            CreateSolutionResponse solutionResponse = personalizeClient.createSolution(solutionRequest);
            return solutionResponse.solutionArn();

        } catch (PersonalizeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

使用下列createPersonalizeSolutionVersion方法建立解決方案版本。將解決方案的 ARN 做為參數傳遞至上一個步驟。下列程式碼會先檢查您的解決方案是否已準備就緒，然後建立解決方案版本。在訓練期間，程式碼會使用 DescribeSolutionVersion操作來擷取解決方案版本的狀態。訓練完成時， 方法會傳回新解決方案版本的 ARN。存放它以供日後使用。

    public static String createPersonalizeSolutionVersion(PersonalizeClient personalizeClient, String solutionArn) {
        long maxTime = 0;
        long waitInMilliseconds = 30 * 1000; // 30 seconds
        String solutionStatus = "";
        String solutionVersionStatus = "";
        String solutionVersionArn = "";

        try {
            DescribeSolutionRequest describeSolutionRequest = DescribeSolutionRequest.builder()
                    .solutionArn(solutionArn)
                    .build();

            maxTime = Instant.now().getEpochSecond() + 3 * 60 * 60;

            // Wait until solution is active.
            while (Instant.now().getEpochSecond() < maxTime) {

                solutionStatus = personalizeClient.describeSolution(describeSolutionRequest).solution().status();
                System.out.println("Solution status: " + solutionStatus);

                if (solutionStatus.equals("ACTIVE") || solutionStatus.equals("CREATE FAILED")) {
                    break;
                }
                try {
                    Thread.sleep(waitInMilliseconds);
                } catch (InterruptedException e) {
                    System.out.println(e.getMessage());
                }
            }

            if (solutionStatus.equals("ACTIVE")) {

                CreateSolutionVersionRequest createSolutionVersionRequest = CreateSolutionVersionRequest.builder()
                        .solutionArn(solutionArn)
                        .build();

                CreateSolutionVersionResponse createSolutionVersionResponse = personalizeClient
                        .createSolutionVersion(createSolutionVersionRequest);
                solutionVersionArn = createSolutionVersionResponse.solutionVersionArn();

                System.out.println("Solution version ARN: " + solutionVersionArn);

                DescribeSolutionVersionRequest describeSolutionVersionRequest = DescribeSolutionVersionRequest.builder()
                        .solutionVersionArn(solutionVersionArn)
                        .build();

                while (Instant.now().getEpochSecond() < maxTime) {

                    solutionVersionStatus = personalizeClient.describeSolutionVersion(describeSolutionVersionRequest)
                            .solutionVersion().status();
                    System.out.println("Solution version status: " + solutionVersionStatus);

                    if (solutionVersionStatus.equals("ACTIVE") || solutionVersionStatus.equals("CREATE FAILED")) {
                        break;
                    }
                    try {
                        Thread.sleep(waitInMilliseconds);
                    } catch (InterruptedException e) {
                        System.out.println(e.getMessage());
                    }
                }
                return solutionVersionArn;
            }
        } catch (PersonalizeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }