開始使用 (AWS SDK for Java)

下面的程序是使用的一個例子 Amazon Kendra 在一個 Java 程序中。該程序執行以下操作：

1. 使用CreateIndex操作創建一個新的索引。

2. 等待索引建立完成。它使用DescribeIndex操作來監視索引的狀態。

3. 索引處於作用中狀態之後，它會使用CreateDataSource作業建立資料來源。

4. 等待資料來源建立完成。它使用DescribeDataSource操作來監視數據源的狀態。

5. 當資料來源處於StartDataSourceSyncJob作用中狀態時，它會使用作業將索引與資料來源的內容同步化。

package com.amazonaws.kendra;

import java.util.concurrent.TimeUnit;
import software.amazon.awssdk.services.kendra.KendraClient;
import software.amazon.awssdk.services.kendra.model.CreateDataSourceRequest;
import software.amazon.awssdk.services.kendra.model.CreateDataSourceResponse;
import software.amazon.awssdk.services.kendra.model.CreateIndexRequest;
import software.amazon.awssdk.services.kendra.model.CreateIndexResponse;
import software.amazon.awssdk.services.kendra.model.DataSourceConfiguration;
import software.amazon.awssdk.services.kendra.model.DataSourceStatus;
import software.amazon.awssdk.services.kendra.model.DataSourceSyncJob;
import software.amazon.awssdk.services.kendra.model.DataSourceSyncJobStatus;
import software.amazon.awssdk.services.kendra.model.DataSourceType;
import software.amazon.awssdk.services.kendra.model.DescribeDataSourceRequest;
import software.amazon.awssdk.services.kendra.model.DescribeDataSourceResponse;
import software.amazon.awssdk.services.kendra.model.DescribeIndexRequest;
import software.amazon.awssdk.services.kendra.model.DescribeIndexResponse;
import software.amazon.awssdk.services.kendra.model.IndexStatus;
import software.amazon.awssdk.services.kendra.model.ListDataSourceSyncJobsRequest;
import software.amazon.awssdk.services.kendra.model.ListDataSourceSyncJobsResponse;
import software.amazon.awssdk.services.kendra.model.S3DataSourceConfiguration;
import software.amazon.awssdk.services.kendra.model.StartDataSourceSyncJobRequest;
import software.amazon.awssdk.services.kendra.model.StartDataSourceSyncJobResponse;


public class CreateIndexAndDataSourceExample {

    public static void main(String[] args) throws InterruptedException {
        System.out.println("Create an index");

        String indexDescription = "Getting started index for Kendra";
        String indexName = "java-getting-started-index";
        String indexRoleArn = "arn:aws:iam::<your AWS account ID>:role/<name of an IAM role>";

        System.out.println(String.format("Creating an index named %s", indexName));
        KendraClient kendra = KendraClient.builder().build();

        CreateIndexRequest createIndexRequest = CreateIndexRequest
            .builder()
            .description(indexDescription)
            .name(indexName)
            .roleArn(indexRoleArn)
            .build();
        CreateIndexResponse createIndexResponse = kendra.createIndex(createIndexRequest);
        System.out.println(String.format("Index response %s", createIndexResponse));

        String indexId = createIndexResponse.id();

        System.out.println(String.format("Waiting until the index with index ID %s is created", indexId));
        while (true) {
            DescribeIndexRequest describeIndexRequest = DescribeIndexRequest.builder().id(indexId).build();
            DescribeIndexResponse describeIndexResponse = kendra.describeIndex(describeIndexRequest);
            IndexStatus status = describeIndexResponse.status();
            if (status != IndexStatus.CREATING) {
                break;
            }

            TimeUnit.SECONDS.sleep(60);
        }

        System.out.println("Creating an S3 data source");
        String dataSourceName = "java-getting-started-data-source";
        String dataSourceDescription = "Getting started data source";
        String s3BucketName = "an-aws-kendra-amzn-s3-demo-bucket";
        String dataSourceRoleArn = "arn:aws:iam::<your AWS account ID>:role/<name of an IAM role>";

        CreateDataSourceRequest createDataSourceRequest = CreateDataSourceRequest
            .builder()
            .indexId(indexId)
            .name(dataSourceName)
            .description(dataSourceDescription)
            .roleArn(dataSourceRoleArn)
            .type(DataSourceType.S3)
            .configuration(
                DataSourceConfiguration
                    .builder()
                    .s3Configuration(
                        S3DataSourceConfiguration
                            .builder()
                            .bucketName(s3BucketName)
                            .build()
                    ).build()
            ).build();

        CreateDataSourceResponse createDataSourceResponse = kendra.createDataSource(createDataSourceRequest);
        System.out.println(String.format("Response of creating data source: %s", createDataSourceResponse));

        String dataSourceId = createDataSourceResponse.id();
        System.out.println(String.format("Waiting for Kendra to create the data source %s", dataSourceId));
        DescribeDataSourceRequest describeDataSourceRequest = DescribeDataSourceRequest
            .builder()
            .indexId(indexId)
            .id(dataSourceId)
            .build();

        while (true) {
            DescribeDataSourceResponse describeDataSourceResponse = kendra.describeDataSource(describeDataSourceRequest);

            DataSourceStatus status = describeDataSourceResponse.status();
            System.out.println(String.format("Creating data source. Status: %s", status));
            if (status != DataSourceStatus.CREATING) {
                break;
            }

            TimeUnit.SECONDS.sleep(60);
        }

        System.out.println(String.format("Synchronize the data source %s", dataSourceId));
        StartDataSourceSyncJobRequest startDataSourceSyncJobRequest = StartDataSourceSyncJobRequest
            .builder()
            .indexId(indexId)
            .id(dataSourceId)
            .build();
        StartDataSourceSyncJobResponse startDataSourceSyncJobResponse = kendra.startDataSourceSyncJob(startDataSourceSyncJobRequest);
        System.out.println(String.format("Waiting for the data source to sync with the index %s for execution ID %s", indexId, startDataSourceSyncJobResponse.executionId()));

        // For this particular list, there should be just one job
        ListDataSourceSyncJobsRequest listDataSourceSyncJobsRequest = ListDataSourceSyncJobsRequest
            .builder()
            .indexId(indexId)
            .id(dataSourceId)
            .build();

        while (true) {
            ListDataSourceSyncJobsResponse listDataSourceSyncJobsResponse = kendra.listDataSourceSyncJobs(listDataSourceSyncJobsRequest);
            DataSourceSyncJob job = listDataSourceSyncJobsResponse.history().get(0);
            System.out.println(String.format("Syncing data source. Status: %s", job.status()));

            if (job.status() != DataSourceSyncJobStatus.SYNCING) {
                break;
            }

            TimeUnit.SECONDS.sleep(60);

        }

        System.out.println("Index setup is complete");
    }
}