SageMaker 用SDK于 Java 2.x 的示例 - AWS SDK for Java 2.x
操作场景

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

SageMaker 用SDK于 Java 2.x 的示例

以下代码示例向您展示了如何使用with来执行操作和实现常见场景 SageMaker。 AWS SDK for Java 2.x

操作是大型程序的代码摘录，必须在上下文中运行。您可以通过操作了解如何调用单个服务函数，还可以通过函数相关场景的上下文查看操作。

场景是向您展示如何通过在一个服务中调用多个函数或与其他 AWS 服务结合来完成特定任务的代码示例。

每个示例都包含一个指向完整源代码的链接，您可以在其中找到有关如何在上下文中设置和运行代码的说明。

开始使用

以下代码示例展示了如何开始使用 SageMaker。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class HelloSageMaker {
    public static void main(String[] args) {
        Region region = Region.US_WEST_2;
        SageMakerClient sageMakerClient = SageMakerClient.builder()
                .region(region)
                .build();

        listBooks(sageMakerClient);
        sageMakerClient.close();
    }

    public static void listBooks(SageMakerClient sageMakerClient) {
        try {
            ListNotebookInstancesResponse notebookInstancesResponse = sageMakerClient.listNotebookInstances();
            List<NotebookInstanceSummary> items = notebookInstancesResponse.notebookInstances();
            for (NotebookInstanceSummary item : items) {
                System.out.println("The notebook name is: " + item.notebookInstanceName());
            }

        } catch (SageMakerException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}

操作

以下代码示例显示了如何使用CreatePipeline。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

    // Create a pipeline from the example pipeline JSON.
    public static void setupPipeline(SageMakerClient sageMakerClient, String filePath, String roleArn,
            String functionArn, String pipelineName) {
        System.out.println("Setting up the pipeline.");
        JSONParser parser = new JSONParser();

        // Read JSON and get pipeline definition.
        try (FileReader reader = new FileReader(filePath)) {
            Object obj = parser.parse(reader);
            JSONObject jsonObject = (JSONObject) obj;
            JSONArray stepsArray = (JSONArray) jsonObject.get("Steps");
            for (Object stepObj : stepsArray) {
                JSONObject step = (JSONObject) stepObj;
                if (step.containsKey("FunctionArn")) {
                    step.put("FunctionArn", functionArn);
                }
            }
            System.out.println(jsonObject);

            // Create the pipeline.
            CreatePipelineRequest pipelineRequest = CreatePipelineRequest.builder()
                    .pipelineDescription("Java SDK example pipeline")
                    .roleArn(roleArn)
                    .pipelineName(pipelineName)
                    .pipelineDefinition(jsonObject.toString())
                    .build();

            sageMakerClient.createPipeline(pipelineRequest);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        } catch (IOException | ParseException e) {
            throw new RuntimeException(e);
        }
    }

  • 有关API详细信息，请参阅 “AWS SDK for Java 2.x API参考 CreatePipeline” 中的。

以下代码示例显示了如何使用DeletePipeline。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

    // Delete a SageMaker pipeline by name.
    public static void deletePipeline(SageMakerClient sageMakerClient, String pipelineName) {
        DeletePipelineRequest pipelineRequest = DeletePipelineRequest.builder()
                .pipelineName(pipelineName)
                .build();

        sageMakerClient.deletePipeline(pipelineRequest);
        System.out.println("*** Successfully deleted " + pipelineName);
    }

  • 有关API详细信息，请参阅 “AWS SDK for Java 2.x API参考 DeletePipeline” 中的。

以下代码示例显示了如何使用DescribePipelineExecution。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

    // Check the status of a pipeline execution.
    public static void waitForPipelineExecution(SageMakerClient sageMakerClient, String executionArn)
            throws InterruptedException {
        String status;
        int index = 0;
        do {
            DescribePipelineExecutionRequest pipelineExecutionRequest = DescribePipelineExecutionRequest.builder()
                    .pipelineExecutionArn(executionArn)
                    .build();

            DescribePipelineExecutionResponse response = sageMakerClient
                    .describePipelineExecution(pipelineExecutionRequest);
            status = response.pipelineExecutionStatusAsString();
            System.out.println(index + ". The Status of the pipeline is " + status);
            TimeUnit.SECONDS.sleep(4);
            index++;
        } while ("Executing".equals(status));
        System.out.println("Pipeline finished with status " + status);
    }

以下代码示例显示了如何使用StartPipelineExecution。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

    // Start a pipeline run with job configurations.
    public static String executePipeline(SageMakerClient sageMakerClient, String bucketName, String queueUrl,
            String roleArn, String pipelineName) {
        System.out.println("Starting pipeline execution.");
        String inputBucketLocation = "s3://" + bucketName + "/samplefiles/latlongtest.csv";
        String output = "s3://" + bucketName + "/outputfiles/";
        Gson gson = new GsonBuilder()
                .setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE)
                .setPrettyPrinting().create();

        // Set up all parameters required to start the pipeline.
        List<Parameter> parameters = new ArrayList<>();
        Parameter para1 = Parameter.builder()
                .name("parameter_execution_role")
                .value(roleArn)
                .build();

        Parameter para2 = Parameter.builder()
                .name("parameter_queue_url")
                .value(queueUrl)
                .build();

        String inputJSON = "{\n" +
                "  \"DataSourceConfig\": {\n" +
                "    \"S3Data\": {\n" +
                "      \"S3Uri\": \"s3://" + bucketName + "/samplefiles/latlongtest.csv\"\n" +
                "    },\n" +
                "    \"Type\": \"S3_DATA\"\n" +
                "  },\n" +
                "  \"DocumentType\": \"CSV\"\n" +
                "}";

        System.out.println(inputJSON);

        Parameter para3 = Parameter.builder()
                .name("parameter_vej_input_config")
                .value(inputJSON)
                .build();

        // Create an ExportVectorEnrichmentJobOutputConfig object.
        VectorEnrichmentJobS3Data jobS3Data = VectorEnrichmentJobS3Data.builder()
                .s3Uri(output)
                .build();

        ExportVectorEnrichmentJobOutputConfig outputConfig = ExportVectorEnrichmentJobOutputConfig.builder()
                .s3Data(jobS3Data)
                .build();

        String gson4 = gson.toJson(outputConfig);
        Parameter para4 = Parameter.builder()
                .name("parameter_vej_export_config")
                .value(gson4)
                .build();
        System.out.println("parameter_vej_export_config:" + gson.toJson(outputConfig));

        // Create a VectorEnrichmentJobConfig object.
        ReverseGeocodingConfig reverseGeocodingConfig = ReverseGeocodingConfig.builder()
                .xAttributeName("Longitude")
                .yAttributeName("Latitude")
                .build();

        VectorEnrichmentJobConfig jobConfig = VectorEnrichmentJobConfig.builder()
                .reverseGeocodingConfig(reverseGeocodingConfig)
                .build();

        String para5JSON = "{\"MapMatchingConfig\":null,\"ReverseGeocodingConfig\":{\"XAttributeName\":\"Longitude\",\"YAttributeName\":\"Latitude\"}}";
        Parameter para5 = Parameter.builder()
                .name("parameter_step_1_vej_config")
                .value(para5JSON)
                .build();

        System.out.println("parameter_step_1_vej_config:" + gson.toJson(jobConfig));
        parameters.add(para1);
        parameters.add(para2);
        parameters.add(para3);
        parameters.add(para4);
        parameters.add(para5);

        StartPipelineExecutionRequest pipelineExecutionRequest = StartPipelineExecutionRequest.builder()
                .pipelineExecutionDescription("Created using Java SDK")
                .pipelineExecutionDisplayName(pipelineName + "-example-execution")
                .pipelineParameters(parameters)
                .pipelineName(pipelineName)
                .build();

        StartPipelineExecutionResponse response = sageMakerClient.startPipelineExecution(pipelineExecutionRequest);
        return response.pipelineExecutionArn();
    }

场景

以下代码示例演示了操作流程：

  • 为管道设置资源。

  • 设置用于执行地理空间作业的管道。

  • 启动管道执行。

  • 监控执行的状态。

  • 查看管道的输出。

  • 清理资源。

有关更多信息，请参阅在 Community.aws AWS SDKs 上使用创建和运行 SageMaker 管道。

SDK适用于 Java 2.x
注意

还有更多相关信息 GitHub。查找完整示例，学习如何在 AWS 代码示例存储库中进行设置和运行。

public class SagemakerWorkflow {
    public static final String DASHES = new String(new char[80]).replace("\0", "-");
    private static String eventSourceMapping = "";

    public static void main(String[] args) throws InterruptedException {
        final String usage = "\n" +
                "Usage:\n" +
                "    <sageMakerRoleName> <lambdaRoleName> <functionFileLocation> <functionName> <queueName> <bucketName> <lnglatData> <spatialPipelinePath> <pipelineName>\n\n"
                +
                "Where:\n" +
                "    sageMakerRoleName - The name of the Amazon SageMaker role.\n\n" +
                "    lambdaRoleName - The name of the AWS Lambda role.\n\n" +
                "    functionFileLocation - The file location where the JAR file that represents the AWS Lambda function is located.\n\n"
                +
                "    functionName - The name of the AWS Lambda function (for example,SageMakerExampleFunction).\n\n" +
                "    queueName - The name of the Amazon Simple Queue Service (Amazon SQS) queue.\n\n" +
                "    bucketName - The name of the Amazon Simple Storage Service (Amazon S3) bucket.\n\n" +
                "    lnglatData - The file location of the latlongtest.csv file required for this use case.\n\n" +
                "    spatialPipelinePath - The file location of the GeoSpatialPipeline.json file required for this use case.\n\n"
                +
                "    pipelineName - The name of the pipeline to create (for example, sagemaker-sdk-example-pipeline).\n\n";

        if (args.length != 9) {
            System.out.println(usage);
            System.exit(1);
        }

        String sageMakerRoleName = args[0];
        String lambdaRoleName = args[1];
        String functionFileLocation = args[2];
        String functionName = args[3];
        String queueName = args[4];
        String bucketName = args[5];
        String lnglatData = args[6];
        String spatialPipelinePath = args[7];
        String pipelineName = args[8];
        String handlerName = "org.example.SageMakerLambdaFunction::handleRequest";

        Region region = Region.US_WEST_2;
        SageMakerClient sageMakerClient = SageMakerClient.builder()
                .region(region)
                .build();

        IamClient iam = IamClient.builder()
                .region(region)
                .build();

        LambdaClient lambdaClient = LambdaClient.builder()
                .region(region)
                .build();

        SqsClient sqsClient = SqsClient.builder()
                .region(region)
                .build();

        S3Client s3Client = S3Client.builder()
                .region(region)
                .build();

        System.out.println(DASHES);
        System.out.println("Welcome to the Amazon SageMaker pipeline example scenario.");
        System.out.println(
                "\nThis example workflow will guide you through setting up and running an" +
                        "\nAmazon SageMaker pipeline. The pipeline uses an AWS Lambda function and an" +
                        "\nAmazon SQS Queue. It runs a vector enrichment reverse geocode job to" +
                        "\nreverse geocode addresses in an input file and store the results in an export file.");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("First, we will set up the roles, functions, and queue needed by the SageMaker pipeline.");
        String lambdaRoleArn = checkLambdaRole(iam, lambdaRoleName);
        String sageMakerRoleArn = checkSageMakerRole(iam, sageMakerRoleName);

        String functionArn = checkFunction(lambdaClient, functionName, functionFileLocation, lambdaRoleArn,
                handlerName);
        String queueUrl = checkQueue(sqsClient, lambdaClient, queueName, functionName);
        System.out.println("The queue URL is " + queueUrl);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("Setting up bucket " + bucketName);
        if (!checkBucket(s3Client, bucketName)) {
            setupBucket(s3Client, bucketName);
            System.out.println("Put " + lnglatData + " into " + bucketName);
            putS3Object(s3Client, bucketName, "latlongtest.csv", lnglatData);
        }
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("Now we can create and run our pipeline.");
        setupPipeline(sageMakerClient, spatialPipelinePath, sageMakerRoleArn, functionArn, pipelineName);
        String pipelineExecutionARN = executePipeline(sageMakerClient, bucketName, queueUrl, sageMakerRoleArn,
                pipelineName);
        System.out.println("The pipeline execution ARN value is " + pipelineExecutionARN);
        waitForPipelineExecution(sageMakerClient, pipelineExecutionARN);
        System.out.println("Getting output results " + bucketName);
        getOutputResults(s3Client, bucketName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("The pipeline has completed. To view the pipeline and runs " +
                "in SageMaker Studio, follow these instructions:" +
                "\nhttps://docs.aws.amazon.com/sagemaker/latest/dg/pipelines-studio.html");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("Do you want to delete the AWS resources used in this Workflow? (y/n)");
        Scanner in = new Scanner(System.in);
        String delResources = in.nextLine();
        if (delResources.compareTo("y") == 0) {
            System.out.println("Lets clean up the AWS resources. Wait 30 seconds");
            TimeUnit.SECONDS.sleep(30);
            deleteEventSourceMapping(lambdaClient);
            deleteSQSQueue(sqsClient, queueName);
            listBucketObjects(s3Client, bucketName);
            deleteBucket(s3Client, bucketName);
            deleteLambdaFunction(lambdaClient, functionName);
            deleteLambdaRole(iam, lambdaRoleName);
            deleteSagemakerRole(iam, sageMakerRoleName);
            deletePipeline(sageMakerClient, pipelineName);
        } else {
            System.out.println("The AWS Resources were not deleted!");
        }
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("SageMaker pipeline scenario is complete.");
        System.out.println(DASHES);
    }

    private static void readObject(S3Client s3Client, String bucketName, String key) {
        System.out.println("Output file contents: \n");
        GetObjectRequest objectRequest = GetObjectRequest.builder()
                .bucket(bucketName)
                .key(key)
                .build();

        ResponseBytes<GetObjectResponse> objectBytes = s3Client.getObjectAsBytes(objectRequest);
        byte[] byteArray = objectBytes.asByteArray();
        String text = new String(byteArray, StandardCharsets.UTF_8);
        System.out.println("Text output: " + text);
    }

    // Display some results from the output directory.
    public static void getOutputResults(S3Client s3Client, String bucketName) {
        System.out.println("Getting output results {bucketName}.");
        ListObjectsRequest listObjectsRequest = ListObjectsRequest.builder()
                .bucket(bucketName)
                .prefix("outputfiles/")
                .build();

        ListObjectsResponse response = s3Client.listObjects(listObjectsRequest);
        List<S3Object> s3Objects = response.contents();
        for (S3Object object : s3Objects) {
            readObject(s3Client, bucketName, object.key());
        }
    }

    // Check the status of a pipeline execution.
    public static void waitForPipelineExecution(SageMakerClient sageMakerClient, String executionArn)
            throws InterruptedException {
        String status;
        int index = 0;
        do {
            DescribePipelineExecutionRequest pipelineExecutionRequest = DescribePipelineExecutionRequest.builder()
                    .pipelineExecutionArn(executionArn)
                    .build();

            DescribePipelineExecutionResponse response = sageMakerClient
                    .describePipelineExecution(pipelineExecutionRequest);
            status = response.pipelineExecutionStatusAsString();
            System.out.println(index + ". The Status of the pipeline is " + status);
            TimeUnit.SECONDS.sleep(4);
            index++;
        } while ("Executing".equals(status));
        System.out.println("Pipeline finished with status " + status);
    }

    // Delete a SageMaker pipeline by name.
    public static void deletePipeline(SageMakerClient sageMakerClient, String pipelineName) {
        DeletePipelineRequest pipelineRequest = DeletePipelineRequest.builder()
                .pipelineName(pipelineName)
                .build();

        sageMakerClient.deletePipeline(pipelineRequest);
        System.out.println("*** Successfully deleted " + pipelineName);
    }

    // Create a pipeline from the example pipeline JSON.
    public static void setupPipeline(SageMakerClient sageMakerClient, String filePath, String roleArn,
            String functionArn, String pipelineName) {
        System.out.println("Setting up the pipeline.");
        JSONParser parser = new JSONParser();

        // Read JSON and get pipeline definition.
        try (FileReader reader = new FileReader(filePath)) {
            Object obj = parser.parse(reader);
            JSONObject jsonObject = (JSONObject) obj;
            JSONArray stepsArray = (JSONArray) jsonObject.get("Steps");
            for (Object stepObj : stepsArray) {
                JSONObject step = (JSONObject) stepObj;
                if (step.containsKey("FunctionArn")) {
                    step.put("FunctionArn", functionArn);
                }
            }
            System.out.println(jsonObject);

            // Create the pipeline.
            CreatePipelineRequest pipelineRequest = CreatePipelineRequest.builder()
                    .pipelineDescription("Java SDK example pipeline")
                    .roleArn(roleArn)
                    .pipelineName(pipelineName)
                    .pipelineDefinition(jsonObject.toString())
                    .build();

            sageMakerClient.createPipeline(pipelineRequest);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        } catch (IOException | ParseException e) {
            throw new RuntimeException(e);
        }
    }

    // Start a pipeline run with job configurations.
    public static String executePipeline(SageMakerClient sageMakerClient, String bucketName, String queueUrl,
            String roleArn, String pipelineName) {
        System.out.println("Starting pipeline execution.");
        String inputBucketLocation = "s3://" + bucketName + "/samplefiles/latlongtest.csv";
        String output = "s3://" + bucketName + "/outputfiles/";
        Gson gson = new GsonBuilder()
                .setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE)
                .setPrettyPrinting().create();

        // Set up all parameters required to start the pipeline.
        List<Parameter> parameters = new ArrayList<>();
        Parameter para1 = Parameter.builder()
                .name("parameter_execution_role")
                .value(roleArn)
                .build();

        Parameter para2 = Parameter.builder()
                .name("parameter_queue_url")
                .value(queueUrl)
                .build();

        String inputJSON = "{\n" +
                "  \"DataSourceConfig\": {\n" +
                "    \"S3Data\": {\n" +
                "      \"S3Uri\": \"s3://" + bucketName + "/samplefiles/latlongtest.csv\"\n" +
                "    },\n" +
                "    \"Type\": \"S3_DATA\"\n" +
                "  },\n" +
                "  \"DocumentType\": \"CSV\"\n" +
                "}";

        System.out.println(inputJSON);

        Parameter para3 = Parameter.builder()
                .name("parameter_vej_input_config")
                .value(inputJSON)
                .build();

        // Create an ExportVectorEnrichmentJobOutputConfig object.
        VectorEnrichmentJobS3Data jobS3Data = VectorEnrichmentJobS3Data.builder()
                .s3Uri(output)
                .build();

        ExportVectorEnrichmentJobOutputConfig outputConfig = ExportVectorEnrichmentJobOutputConfig.builder()
                .s3Data(jobS3Data)
                .build();

        String gson4 = gson.toJson(outputConfig);
        Parameter para4 = Parameter.builder()
                .name("parameter_vej_export_config")
                .value(gson4)
                .build();
        System.out.println("parameter_vej_export_config:" + gson.toJson(outputConfig));

        // Create a VectorEnrichmentJobConfig object.
        ReverseGeocodingConfig reverseGeocodingConfig = ReverseGeocodingConfig.builder()
                .xAttributeName("Longitude")
                .yAttributeName("Latitude")
                .build();

        VectorEnrichmentJobConfig jobConfig = VectorEnrichmentJobConfig.builder()
                .reverseGeocodingConfig(reverseGeocodingConfig)
                .build();

        String para5JSON = "{\"MapMatchingConfig\":null,\"ReverseGeocodingConfig\":{\"XAttributeName\":\"Longitude\",\"YAttributeName\":\"Latitude\"}}";
        Parameter para5 = Parameter.builder()
                .name("parameter_step_1_vej_config")
                .value(para5JSON)
                .build();

        System.out.println("parameter_step_1_vej_config:" + gson.toJson(jobConfig));
        parameters.add(para1);
        parameters.add(para2);
        parameters.add(para3);
        parameters.add(para4);
        parameters.add(para5);

        StartPipelineExecutionRequest pipelineExecutionRequest = StartPipelineExecutionRequest.builder()
                .pipelineExecutionDescription("Created using Java SDK")
                .pipelineExecutionDisplayName(pipelineName + "-example-execution")
                .pipelineParameters(parameters)
                .pipelineName(pipelineName)
                .build();

        StartPipelineExecutionResponse response = sageMakerClient.startPipelineExecution(pipelineExecutionRequest);
        return response.pipelineExecutionArn();
    }

    public static void deleteEventSourceMapping(LambdaClient lambdaClient) {
        DeleteEventSourceMappingRequest eventSourceMappingRequest = DeleteEventSourceMappingRequest.builder()
                .uuid(eventSourceMapping)
                .build();

        lambdaClient.deleteEventSourceMapping(eventSourceMappingRequest);
    }

    public static void deleteSagemakerRole(IamClient iam, String roleName) {
        String[] sageMakerRolePolicies = getSageMakerRolePolicies();
        try {
            for (String policy : sageMakerRolePolicies) {
                // First the policy needs to be detached.
                DetachRolePolicyRequest rolePolicyRequest = DetachRolePolicyRequest.builder()
                        .policyArn(policy)
                        .roleName(roleName)
                        .build();

                iam.detachRolePolicy(rolePolicyRequest);
            }

            // Delete the role.
            DeleteRoleRequest roleRequest = DeleteRoleRequest.builder()
                    .roleName(roleName)
                    .build();

            iam.deleteRole(roleRequest);
            System.out.println("*** Successfully deleted " + roleName);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void deleteLambdaRole(IamClient iam, String roleName) {
        String[] lambdaRolePolicies = getLambdaRolePolicies();
        try {
            for (String policy : lambdaRolePolicies) {
                // First the policy needs to be detached.
                DetachRolePolicyRequest rolePolicyRequest = DetachRolePolicyRequest.builder()
                        .policyArn(policy)
                        .roleName(roleName)
                        .build();

                iam.detachRolePolicy(rolePolicyRequest);
            }

            // Delete the role.
            DeleteRoleRequest roleRequest = DeleteRoleRequest.builder()
                    .roleName(roleName)
                    .build();

            iam.deleteRole(roleRequest);
            System.out.println("*** Successfully deleted " + roleName);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    // Delete the specific AWS Lambda function.
    public static void deleteLambdaFunction(LambdaClient awsLambda, String functionName) {
        try {
            DeleteFunctionRequest request = DeleteFunctionRequest.builder()
                    .functionName(functionName)
                    .build();

            awsLambda.deleteFunction(request);
            System.out.println("*** " + functionName + " was deleted");

        } catch (LambdaException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    // Delete the specific S3 bucket.
    public static void deleteBucket(S3Client s3Client, String bucketName) {
        DeleteBucketRequest deleteBucketRequest = DeleteBucketRequest.builder()
                .bucket(bucketName)
                .build();
        s3Client.deleteBucket(deleteBucketRequest);
        System.out.println("*** " + bucketName + " was deleted.");
    }

    public static void listBucketObjects(S3Client s3, String bucketName) {
        try {
            ListObjectsRequest listObjects = ListObjectsRequest
                    .builder()
                    .bucket(bucketName)
                    .build();

            ListObjectsResponse res = s3.listObjects(listObjects);
            List<S3Object> objects = res.contents();
            for (S3Object myValue : objects) {
                System.out.print("\n The name of the key is " + myValue.key());
                deleteBucketObjects(s3, bucketName, myValue.key());
            }

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void deleteBucketObjects(S3Client s3, String bucketName, String objectName) {
        ArrayList<ObjectIdentifier> toDelete = new ArrayList<>();
        toDelete.add(ObjectIdentifier.builder()
                .key(objectName)
                .build());
        try {
            DeleteObjectsRequest dor = DeleteObjectsRequest.builder()
                    .bucket(bucketName)
                    .delete(Delete.builder()
                            .objects(toDelete).build())
                    .build();

            s3.deleteObjects(dor);
            System.out.println("*** " + bucketName + " objects were deleted.");

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    // Delete the specific Amazon SQS queue.
    public static void deleteSQSQueue(SqsClient sqsClient, String queueName) {
        try {
            GetQueueUrlRequest getQueueRequest = GetQueueUrlRequest.builder()
                    .queueName(queueName)
                    .build();

            String queueUrl = sqsClient.getQueueUrl(getQueueRequest).queueUrl();
            DeleteQueueRequest deleteQueueRequest = DeleteQueueRequest.builder()
                    .queueUrl(queueUrl)
                    .build();

            sqsClient.deleteQueue(deleteQueueRequest);

        } catch (SqsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void putS3Object(S3Client s3, String bucketName, String objectKey, String objectPath) {
        try {
            Map<String, String> metadata = new HashMap<>();
            metadata.put("x-amz-meta-myVal", "test");
            PutObjectRequest putOb = PutObjectRequest.builder()
                    .bucket(bucketName)
                    .key("samplefiles/" + objectKey)
                    .metadata(metadata)
                    .build();

            s3.putObject(putOb, RequestBody.fromFile(new File(objectPath)));
            System.out.println("Successfully placed " + objectKey + " into bucket " + bucketName);

        } catch (S3Exception e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static void setupBucket(S3Client s3Client, String bucketName) {
        try {
            S3Waiter s3Waiter = s3Client.waiter();
            CreateBucketRequest bucketRequest = CreateBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            s3Client.createBucket(bucketRequest);
            HeadBucketRequest bucketRequestWait = HeadBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            // Wait until the bucket is created and print out the response.
            WaiterResponse<HeadBucketResponse> waiterResponse = s3Waiter.waitUntilBucketExists(bucketRequestWait);
            waiterResponse.matched().response().ifPresent(System.out::println);
            System.out.println(bucketName + " is ready");

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    // Set up the SQS queue to use with the pipeline.
    public static String setupQueue(SqsClient sqsClient, LambdaClient lambdaClient, String queueName,
            String lambdaName) {
        System.out.println("Setting up queue named " + queueName);
        try {
            Map<QueueAttributeName, String> queueAtt = new HashMap<>();
            queueAtt.put(QueueAttributeName.DELAY_SECONDS, "5");
            queueAtt.put(QueueAttributeName.RECEIVE_MESSAGE_WAIT_TIME_SECONDS, "5");
            queueAtt.put(QueueAttributeName.VISIBILITY_TIMEOUT, "300");
            CreateQueueRequest createQueueRequest = CreateQueueRequest.builder()
                    .queueName(queueName)
                    .attributes(queueAtt)
                    .build();

            sqsClient.createQueue(createQueueRequest);
            System.out.println("\nGet queue url");
            GetQueueUrlResponse getQueueUrlResponse = sqsClient
                    .getQueueUrl(GetQueueUrlRequest.builder().queueName(queueName).build());
            TimeUnit.SECONDS.sleep(15);

            connectLambda(sqsClient, lambdaClient, getQueueUrlResponse.queueUrl(), lambdaName);
            System.out.println("Queue ready with Url " + getQueueUrlResponse.queueUrl());
            return getQueueUrlResponse.queueUrl();

        } catch (SqsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        return "";
    }

    // Connect the queue to the Lambda function as an event source.
    public static void connectLambda(SqsClient sqsClient, LambdaClient lambdaClient, String queueUrl,
            String lambdaName) {
        System.out.println("Connecting the Lambda function and queue for the pipeline.");
        String queueArn = "";

        // Specify the attributes to retrieve.
        List<QueueAttributeName> atts = new ArrayList<>();
        atts.add(QueueAttributeName.QUEUE_ARN);
        GetQueueAttributesRequest attributesRequest = GetQueueAttributesRequest.builder()
                .queueUrl(queueUrl)
                .attributeNames(atts)
                .build();

        GetQueueAttributesResponse response = sqsClient.getQueueAttributes(attributesRequest);
        Map<String, String> queueAtts = response.attributesAsStrings();
        for (Map.Entry<String, String> queueAtt : queueAtts.entrySet()) {
            System.out.println("Key = " + queueAtt.getKey() + ", Value = " + queueAtt.getValue());
            queueArn = queueAtt.getValue();
        }

        CreateEventSourceMappingRequest eventSourceMappingRequest = CreateEventSourceMappingRequest.builder()
                .eventSourceArn(queueArn)
                .functionName(lambdaName)
                .build();

        CreateEventSourceMappingResponse response1 = lambdaClient.createEventSourceMapping(eventSourceMappingRequest);
        eventSourceMapping = response1.uuid();
        System.out.println("The mapping between the event source and Lambda function was successful");
    }

    // Create an AWS Lambda function.
    public static String createLambdaFunction(LambdaClient awsLambda, String functionName, String filePath, String role,
            String handler) {
        try {
            LambdaWaiter waiter = awsLambda.waiter();
            InputStream is = new FileInputStream(filePath);
            SdkBytes fileToUpload = SdkBytes.fromInputStream(is);
            FunctionCode code = FunctionCode.builder()
                    .zipFile(fileToUpload)
                    .build();

            CreateFunctionRequest functionRequest = CreateFunctionRequest.builder()
                    .functionName(functionName)
                    .description("SageMaker example function.")
                    .code(code)
                    .handler(handler)
                    .runtime(Runtime.JAVA11)
                    .timeout(200)
                    .memorySize(1024)
                    .role(role)
                    .build();

            // Create a Lambda function using a waiter.
            CreateFunctionResponse functionResponse = awsLambda.createFunction(functionRequest);
            GetFunctionRequest getFunctionRequest = GetFunctionRequest.builder()
                    .functionName(functionName)
                    .build();
            WaiterResponse<GetFunctionResponse> waiterResponse = waiter.waitUntilFunctionExists(getFunctionRequest);
            waiterResponse.matched().response().ifPresent(System.out::println);
            System.out.println("The function ARN is " + functionResponse.functionArn());
            return functionResponse.functionArn();

        } catch (LambdaException | FileNotFoundException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return "";
    }

    public static String createSageMakerRole(IamClient iam, String roleName) {
        String[] sageMakerRolePolicies = getSageMakerRolePolicies();
        System.out.println("Creating a role to use with SageMaker.");
        String assumeRolePolicy = "{" +
                "\"Version\": \"2012-10-17\"," +
                "\"Statement\": [{" +
                "\"Effect\": \"Allow\"," +
                "\"Principal\": {" +
                "\"Service\": [" +
                "\"sagemaker.amazonaws.com\"," +
                "\"sagemaker-geospatial.amazonaws.com\"," +
                "\"lambda.amazonaws.com\"," +
                "\"s3.amazonaws.com\"" +
                "]" +
                "}," +
                "\"Action\": \"sts:AssumeRole\"" +
                "}]" +
                "}";

        try {
            CreateRoleRequest request = CreateRoleRequest.builder()
                    .roleName(roleName)
                    .assumeRolePolicyDocument(assumeRolePolicy)
                    .description("Created using the AWS SDK for Java")
                    .build();

            CreateRoleResponse roleResult = iam.createRole(request);

            // Attach the policies to the role.
            for (String policy : sageMakerRolePolicies) {
                AttachRolePolicyRequest attachRequest = AttachRolePolicyRequest.builder()
                        .roleName(roleName)
                        .policyArn(policy)
                        .build();

                iam.attachRolePolicy(attachRequest);
            }

            // Allow time for the role to be ready.
            TimeUnit.SECONDS.sleep(15);
            System.out.println("Role ready with ARN " + roleResult.role().arn());
            return roleResult.role().arn();

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        return "";
    }

    private static String createLambdaRole(IamClient iam, String roleName) {
        String[] lambdaRolePolicies = getLambdaRolePolicies();
        String assumeRolePolicy = "{" +
                "\"Version\": \"2012-10-17\"," +
                "\"Statement\": [{" +
                "\"Effect\": \"Allow\"," +
                "\"Principal\": {" +
                "\"Service\": [" +
                "\"sagemaker.amazonaws.com\"," +
                "\"sagemaker-geospatial.amazonaws.com\"," +
                "\"lambda.amazonaws.com\"," +
                "\"s3.amazonaws.com\"" +
                "]" +
                "}," +
                "\"Action\": \"sts:AssumeRole\"" +
                "}]" +
                "}";

        try {
            CreateRoleRequest request = CreateRoleRequest.builder()
                    .roleName(roleName)
                    .assumeRolePolicyDocument(assumeRolePolicy)
                    .description("Created using the AWS SDK for Java")
                    .build();

            CreateRoleResponse roleResult = iam.createRole(request);

            // Attach the policies to the role.
            for (String policy : lambdaRolePolicies) {
                AttachRolePolicyRequest attachRequest = AttachRolePolicyRequest.builder()
                        .roleName(roleName)
                        .policyArn(policy)
                        .build();

                iam.attachRolePolicy(attachRequest);
            }

            // Allow time for the role to be ready.
            TimeUnit.SECONDS.sleep(15);
            System.out.println("Role ready with ARN " + roleResult.role().arn());
            return roleResult.role().arn();

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());

        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        return "";
    }

    public static String checkFunction(LambdaClient lambdaClient, String functionName, String filePath, String role,
            String handler) {
        System.out.println("Create an AWS Lambda function used in this workflow.");
        String functionArn;
        try {
            // Does this function already exist.
            GetFunctionRequest functionRequest = GetFunctionRequest.builder()
                    .functionName(functionName)
                    .build();

            GetFunctionResponse response = lambdaClient.getFunction(functionRequest);
            functionArn = response.configuration().functionArn();

        } catch (LambdaException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            functionArn = createLambdaFunction(lambdaClient, functionName, filePath, role, handler);
        }
        return functionArn;
    }

    // Check to see if the specific S3 bucket exists. If the S3 bucket exists, this
    // method returns true.
    public static boolean checkBucket(S3Client s3, String bucketName) {
        try {
            HeadBucketRequest headBucketRequest = HeadBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            s3.headBucket(headBucketRequest);
            System.out.println(bucketName + " exists");
            return true;

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
        }
        return false;
    }

    // Checks to see if the Amazon SQS queue exists. If not, this method creates a
    // new queue
    // and returns the ARN value.
    public static String checkQueue(SqsClient sqsClient, LambdaClient lambdaClient, String queueName,
            String lambdaName) {
        System.out.println("Creating a queue for this use case.");
        String queueUrl;
        try {
            GetQueueUrlRequest request = GetQueueUrlRequest.builder()
                    .queueName(queueName)
                    .build();

            GetQueueUrlResponse response = sqsClient.getQueueUrl(request);
            queueUrl = response.queueUrl();
            System.out.println(queueUrl);

        } catch (SqsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            queueUrl = setupQueue(sqsClient, lambdaClient, queueName, lambdaName);
        }
        return queueUrl;
    }

    // Checks to see if the Lambda role exists. If not, this method creates it.
    public static String checkLambdaRole(IamClient iam, String roleName) {
        System.out.println("Creating a role to for AWS Lambda to use.");
        String roleArn;
        try {
            GetRoleRequest roleRequest = GetRoleRequest.builder()
                    .roleName(roleName)
                    .build();

            GetRoleResponse response = iam.getRole(roleRequest);
            roleArn = response.role().arn();
            System.out.println(roleArn);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            roleArn = createLambdaRole(iam, roleName);
        }
        return roleArn;
    }

    // Checks to see if the SageMaker role exists. If not, this method creates it.
    public static String checkSageMakerRole(IamClient iam, String roleName) {
        System.out.println("Creating a role to for AWS SageMaker to use.");
        String roleArn;
        try {
            GetRoleRequest roleRequest = GetRoleRequest.builder()
                    .roleName(roleName)
                    .build();

            GetRoleResponse response = iam.getRole(roleRequest);
            roleArn = response.role().arn();
            System.out.println(roleArn);

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            roleArn = createSageMakerRole(iam, roleName);
        }
        return roleArn;
    }

    private static String[] getSageMakerRolePolicies() {
        String[] sageMakerRolePolicies = new String[3];
        sageMakerRolePolicies[0] = "arn:aws:iam::aws:policy/AmazonSageMakerFullAccess";
        sageMakerRolePolicies[1] = "arn:aws:iam::aws:policy/" + "AmazonSageMakerGeospatialFullAccess";
        sageMakerRolePolicies[2] = "arn:aws:iam::aws:policy/AmazonSQSFullAccess";
        return sageMakerRolePolicies;
    }

    private static String[] getLambdaRolePolicies() {
        String[] lambdaRolePolicies = new String[5];
        lambdaRolePolicies[0] = "arn:aws:iam::aws:policy/AmazonSageMakerFullAccess";
        lambdaRolePolicies[1] = "arn:aws:iam::aws:policy/AmazonSQSFullAccess";
        lambdaRolePolicies[2] = "arn:aws:iam::aws:policy/service-role/" + "AmazonSageMakerGeospatialFullAccess";
        lambdaRolePolicies[3] = "arn:aws:iam::aws:policy/service-role/"
                + "AmazonSageMakerServiceCatalogProductsLambdaServiceRolePolicy";
        lambdaRolePolicies[4] = "arn:aws:iam::aws:policy/service-role/" + "AWSLambdaSQSQueueExecutionRole";
        return lambdaRolePolicies;
    }
}