Connect the Java driver to your database
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DataStax recommends using the Java client with HCD databases. Use the Java driver only if you are working with an existing application that previously used a CQL-based driver or if you plan to explicitly use CQL. |
Initialize the Java driver to connect to your database.
Prerequisite
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You have installed a cluster.
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You have created a keyspace.
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You have installed Java.
Connect
This code imports the necessary classes, sets up a CqlSession with authentication credentials, and specifies a default keyspace.
import com.datastax.oss.driver.api.core.CqlSession; import com.datastax.oss.driver.api.core.cql.ResultSet; import com.datastax.oss.driver.api.core.cql.Row; import com.datastax.oss.driver.api.core.CqlSessionBuilder; import com.datastax.oss.driver.api.core.cql.PreparedStatement; import com.datastax.oss.driver.api.core.data.CqlVector; import com.datastax.oss.driver.api.core.type.codec.TypeCodecs;
import java.nio.file.Paths; import java.util.Arrays; import java.util.List;
public class DriverExample { public static void main(String[] args) { // Initialize the Java driver String keyspace = "default_keyspace"; CqlSessionBuilder builder = CqlSession.builder(); builder.withAuthCredentials("user_name","password"); builder.withKeyspace(keyspace);
try (CqlSession session = builder.build()) {
int v_dimension = 5;
// ...
}
}
}
See the Java quickstart for details on how to add dependencies, connect to an HCD database, create a table and vector-compatible SAI (Storage-Attached Index), load data, and perform a similarity search.
