Mengelola Azure Data Lake Analytics menggunakan aplikasi Java

  • Artikel

Penting

Azure Data Lake Analytics pensiun pada 29 Februari 2024. Pelajari lebih lanjut dengan pengumuman ini.

Untuk analitik data, organisasi Anda dapat menggunakan Azure Synapse Analytics atau Microsoft Fabric.

Artikel ini menjelaskan cara mengelola akun, sumber data, pengguna, dan pekerjaan Azure Data Lake Analytics menggunakan aplikasi yang ditulis menggunakan Azure Java SDK.

Prasyarat

  • Java Development Kit (JDK) 8 (menggunakan Java versi 1.8).
  • IntelliJ atau lingkungan pengembangan Java lainnya yang cocok. Petunjuk dalam dokumen ini menggunakan IntelliJ.
  • Buat aplikasi Microsoft Entra dan ambil ID Klien, ID Penyewa, dan Kuncinya. Untuk informasi selengkapnya tentang aplikasi Microsoft Entra dan instruksi tentang cara mendapatkan ID klien, lihat Membuat aplikasi Direktori Aktif dan perwakilan layanan menggunakan portal. URI Balasan dan Kunci disediakan oleh portal setelah aplikasi dibuat dan kunci dihasilkan.

Mengautentikasi menggunakan Microsoft Entra ID

Cuplikan kode berikut menyediakan kode untuk autentikasi non-interaktif, di mana aplikasi menyediakan kredensialnya sendiri.

Membuat aplikasi Java

  1. Buka IntelliJ dan buat proyek Java menggunakan templat Command-Line App.
  2. Klik kanan proyek di sisi kiri layar Anda dan pilih Tambahkan Dukungan Kerangka Kerja. Pilih Maven dan pilih OK.
  3. Buka file "pom.xml" yang baru dibuat dan tambahkan cuplikan teks berikut antara <tag /version> dan <tag /project> :
<dependencies>
    <dependency>
      <groupId>com.azure.resourcemanager</groupId>
      <artifactId>azure-resourcemanager-datalakeanalytics</artifactId>
      <version>1.0.0-beta.1</version>
    </dependency>
    <dependency>
      <groupId>com.azure.resourcemanager</groupId>
      <artifactId>azure-resourcemanager-datalakestore</artifactId>
      <version>1.0.0-beta.1</version>
    </dependency>
    <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-storage-file-datalake</artifactId>
      <version>12.7.2</version>
    </dependency>
    <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-identity</artifactId>
      <version>1.4.1</version>
    </dependency>
</dependencies>

Buka Penyebaran Eksekusi > Build > Pengaturan > File>. Pilih Build Tools > Maven > Importing. Kemudian periksa Mengimpor proyek Maven secara otomatis.

Buka Main.java dan ganti blok kode yang ada dengan kode berikut:

import com.azure.core.credential.TokenCredential;
import com.azure.core.management.AzureEnvironment;
import com.azure.core.management.profile.AzureProfile;
import com.azure.identity.ClientSecretCredential;
import com.azure.identity.ClientSecretCredentialBuilder;
import com.azure.resourcemanager.datalakeanalytics.DataLakeAnalyticsManager;
import com.azure.resourcemanager.datalakeanalytics.models.DataLakeAnalyticsAccount;
import com.azure.resourcemanager.datalakestore.DataLakeStoreManager;
import com.azure.resourcemanager.datalakestore.models.DataLakeStoreAccount;
import com.azure.storage.file.datalake.DataLakeFileClient;
import com.azure.storage.file.datalake.DataLakeFileSystemClient;
import com.azure.storage.file.datalake.DataLakeServiceClient;
import com.azure.storage.file.datalake.DataLakeServiceClientBuilder;
import com.azure.storage.file.datalake.models.PathAccessControl;
import com.azure.storage.file.datalake.models.PathPermissions;

import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collections;
import java.util.UUID;

public class Main {
    private static String adlsAccountName;
    private static String adlaAccountName;
    private static String resourceGroupName;
    private static String location;

    private static String tenantId;
    private static String subscriptionId;
    private static String clientId;
    private static String clientSecret;
    private static String fileSystemName;
    private static String localFolderPath;

    private static DataLakeAnalyticsManager analyticsManager;
    private static DataLakeStoreManager storeManager;
    private static DataLakeStoreAccount storeAccount;
    private static DataLakeAnalyticsAccount analyticsAccount;
    private static DataLakeServiceClient serviceClient;
    private static DataLakeFileSystemClient fileSystemClient;
    private static DataLakeFileClient fileClient;

    public static void main(String[] args) throws Exception {
        adlsAccountName = "<DATA-LAKE-STORE-NAME>";
        adlaAccountName = "<DATA-LAKE-ANALYTICS-NAME>";
        resourceGroupName = "<RESOURCE-GROUP-NAME>";
        location = "East US 2";

        tenantId = "<TENANT-ID>";
        subscriptionId = "<SUBSCRIPTION-ID>";
        clientId = "<CLIENT-ID>";
        clientSecret = "<CLIENT-SECRET>";
        fileSystemName = "<DATALAKE-FILE-SYSTEM-NAME>";

        localFolderPath = "C:\\local_path\\";

        // ----------------------------------------
        // Authenticate
        // ----------------------------------------
        AzureProfile profile = new AzureProfile(AzureEnvironment.AZURE);
        ClientSecretCredential creds = new ClientSecretCredentialBuilder()
                .clientId(clientId).tenantId(tenantId).clientSecret(clientSecret)
                .authorityHost("https://login.microsoftonline.com/" + tenantId + "/oauth2/token")
                .build();
        setupClients(creds, profile);

        // ----------------------------------------
        // List Data Lake Store and Analytics accounts that this app can access
        // ----------------------------------------
        System.out.println(String.format("All ADL Store accounts that this app can access in subscription %s:", subscriptionId));
        storeManager.accounts().list().forEach(acct -> System.out.println(acct.name()));

        System.out.println(String.format("All ADL Analytics accounts that this app can access in subscription %s:", subscriptionId));
        analyticsManager.accounts().list().forEach(acct -> System.out.println(acct.name()));
        waitForNewline("Accounts displayed.", "Creating files.");

        // ----------------------------------------
        // Create a file in Data Lake Store: input1.csv
        // ----------------------------------------
        createFile("input1.csv", "123,abc", true);
        waitForNewline("File created.", "Submitting a job.");

        // ----------------------------------------
        // Submit a job to Data Lake Analytics
        // ----------------------------------------
        String script = "@input = EXTRACT Row1 string, Row2 string FROM \"/input1.csv\" USING Extractors.Csv(); OUTPUT @input TO @\"/output1.csv\" USING Outputters.Csv();";
        UUID jobId = submitJobByScript(script, "testJob", creds);
        waitForNewline("Job submitted.", "Getting job status.");

        // ----------------------------------------
        // Download job output from Data Lake Store
        // ----------------------------------------
        downloadFile("output1.csv", localFolderPath + "output1.csv");
        waitForNewline("Job output downloaded.", "Deleting file.");

        deleteFile("output1.csv");
        waitForNewline("File deleted.", "Done.");
    }

    public static void setupClients(TokenCredential creds, AzureProfile profile) {

        analyticsManager = DataLakeAnalyticsManager.authenticate(creds, profile);

        storeManager = DataLakeStoreManager.authenticate(creds, profile);

        createAccounts();

        serviceClient = new DataLakeServiceClientBuilder().endpoint(storeAccount.endpoint()).credential(creds).buildClient();

        fileSystemClient = serviceClient.createFileSystem(fileSystemName);

    }

    public static void waitForNewline(String reason, String nextAction) {
        if (nextAction == null)
            nextAction = "";

        System.out.println(reason + "\r\nPress ENTER to continue...");
        try {
            System.in.read();
        } catch (Exception e) {
        }

        if (!nextAction.isEmpty()) {
            System.out.println(nextAction);
        }
    }

    // Create accounts
    public static void createAccounts() {
        // Create ADLS account
        storeAccount = storeManager.accounts().define(adlsAccountName)
                .withRegion(location)
                .withExistingResourceGroup(resourceGroupName)
                .create();

        analyticsAccount = analyticsManager.accounts().define(adlaAccountName)
                .withRegion(location).withExistingResourceGroup(resourceGroupName)
                .withDefaultDataLakeStoreAccount(adlsAccountName)
                .withDataLakeStoreAccounts(Collections.EMPTY_LIST)
                .create();
    }

    // Create a file
    public static void createFile(String path, String contents, boolean force) {
        byte[] bytesContents = contents.getBytes();

        DataLakeFileClient fileClient = fileSystemClient.createFile(path,force);
        PathAccessControl accessControl = fileClient.getAccessControl();
        fileClient.setPermissions(PathPermissions.parseOctal("744"), accessControl.getGroup(), accessControl.getOwner());
        fileClient.upload(new ByteArrayInputStream(bytesContents), bytesContents.length);
    }

    // Delete a file
    public static void deleteFile(String filePath) {
        fileSystemClient.getFileClient(filePath).delete();
    }

    // Download a file
    private static void downloadFile(String srcPath, String destPath) throws IOException {

        fileClient = fileSystemClient.getFileClient(srcPath);
        OutputStream outputStream = new FileOutputStream(destPath);
        fileClient.read(outputStream);
        outputStream.close();
    }

}

Berikan nilai untuk parameter yang diperintahkan di cuplikan kode:

  • adlsAccountName
  • adlaAccountName
  • resourceGroupName
  • location
  • tenantId
  • subscriptionId
  • clientId
  • clientSecret
  • fileSystemName
  • localFolderPath

Langkah berikutnya