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Connect to Azure Data Explorer with JDBC

  • Άρθρο

Java Database Connectivity (JDBC) is a Java API used to connect to databases and execute queries. You can use JDBC to connect to Azure Data Explorer. This functionality is made possible by Azure Data Explorer's TDS-compliant endpoint, which emulates Microsoft SQL Server. The endpoint supports TDS versions 7.x and 8.0.

For more information, see the overview on SQL Server emulation in Azure Data Explorer.

Connect with JDBC

The following steps describe how to use JDBC to connect to Azure Data Explorer.

  1. Create an application with mssql-jdbc JAR, adal4j JAR, and all of their dependencies. Following is a list of dependencies required when using the 7.0.0 version of mssql-jdbc and 1.6.3 version of adal4j.

    mssql-jdbc-7.0.0.jre8.jar
adal4j-1.6.3.jar
accessors-smart-1.2.jar
activation-1.1.jar
asm-5.0.4.jar
commons-codec-1.11.jar
commons-lang3-3.5.jar
gson-2.8.0.jar
javax.mail-1.6.1.jar
jcip-annotations-1.0-1.jar
json-smart-2.3.jar
lang-tag-1.4.4.jar
nimbus-jose-jwt-6.5.jar
oauth2-oidc-sdk-5.64.4.jar
slf4j-api-1.7.21.jar

  2. Create an application to use the JDBC driver class com.microsoft.sqlserver.jdbc.SQLServerDriver. You can connect with a connection string of the following format. Replace <cluster_name.region> with your cluster name and cluster region and <database_name> with your database name.

    jdbc:sqlserver://<cluster_name.region>.kusto.windows.net:1433;database=<database_name>;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.kusto.windows.net;loginTimeout=30;authentication=ActiveDirectoryIntegrated

JDBC user authentication

Following is an example of how to programmatically authenticate using Microsoft Entra ID with JDBC for a user principal.

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import com.microsoft.sqlserver.jdbc.SQLServerDataSource;
import com.microsoft.aad.msal4j.*;

public class Sample {
  public static void main(String[] args) throws Exception {
    IAuthenticationResult authenticationResult = futureAuthenticationResult.get();
    SQLServerDataSource ds = new SQLServerDataSource();
    ds.setServerName("<cluster_DNS>");
    ds.setDatabaseName("<database_name>");
    ds.setHostNameInCertificate("*.kusto.windows.net"); // Or appropriate regional domain.
    ds.setAuthentication("ActiveDirectoryIntegrated");
    try (Connection connection = ds.getConnection();
         Statement stmt = connection.createStatement();) {
      ResultSet rs = stmt.executeQuery("<T-SQL_query>");
      /*
      Read query result.
      */
    } catch (Exception e) {
      System.out.println();
      e.printStackTrace();
    }
  }
}

JDBC application authentication

Following is an example of how to programmatically authenticate using Microsoft Entra ID with JDBC for an application principal.

import java.sql.*;
import com.microsoft.sqlserver.jdbc.*;
import com.microsoft.aad.msal4j.*;
import java.net.MalformedURLException;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class Sample {
  public static void main(String[] args) throws Throwable {
    // Can also use tenant name.
    String authorityUrl = "https://login.microsoftonline.com/<tenant_ID>";
    Set<String> scopes = new HashSet<>();
    scopes.add("https://<cluster_DNS>/.default");

    IConfidentialClientApplication clientApplication = ConfidentialClientApplication.builder("<application_client_ID>", ClientCredentialFactory.createFromSecret("<application_key>")).authority(authorityUrl).build();
    CompletableFuture<IAuthenticationResult> futureAuthenticationResult = clientApplication.acquireToken(ClientCredentialParameters.builder(scopes).build());
    IAuthenticationResult authenticationResult = futureAuthenticationResult.get();
    SQLServerDataSource ds = new SQLServerDataSource();
    ds.setServerName("<cluster_DNS>");
    ds.setDatabaseName("<database_name>");
    ds.setAccessToken(authenticationResult.accessToken());
    connection = ds.getConnection();
    statement = connection.createStatement();
    ResultSet rs = statement.executeQuery("<T-SQL_query>");
    /*
    Read query result.
    */
  }
}

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