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.
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HCD APIs use the term keyspace to refer to both namespaces and keyspaces. |
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.
