Connect with the Java client

Learn how to connect to a Serverless (Vector) database with the astra-db-java client.

Prerequisites

An active Astra account
An active Serverless (Vector) database
An application token with the Database Administrator role

Install the Java client

Install the Java client with Maven or Gradle.

Maven
Gradle

Install Java 11+ and Maven 3.9+.

Create a pom.xml file in the root of your project, and then replace VERSION with the latest version of the Java client.

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                             http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.example</groupId>
  <artifactId>test-java-client</artifactId>
  <version>1.0-SNAPSHOT</version>

  <!-- The Java client -->
  <dependencies>
    <dependency>
      <groupId>com.datastax.astra</groupId>
      <artifactId>astra-db-java</artifactId>
      <version>VERSION</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>3.0.0</version>
        <configuration>
          <executable>java</executable>
          <mainClass>com.example.Quickstart</mainClass>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>java</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>11</source>
          <target>11</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Install Java 11+ and Gradle.

Create a build.gradle file in the root of your project:

build.gradle

plugins {
    id 'java'
    id 'application'
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'com.datastax.astra:astra-db-java:1.+'
}

application {
    mainClassName = 'com.example.Quickstart'
}

Connect to a vector-enabled Astra DB Serverless database

Create a file named Quickstart.java in the ./src/main/java/com/example/ directory of your project:

src/main/java/com/example/Quickstart.java

import com.datastax.astra.client.Collection;
import com.datastax.astra.client.DataAPIClient;
import com.datastax.astra.client.Database;
import com.datastax.astra.client.model.Document;
import com.datastax.astra.client.model.FindIterable;
import com.datastax.astra.client.model.SimilarityMetric;

public class Quickstart {

  public static void main(String[] args) {
    // Loading Arguments
    String astraToken = System.getenv("ASTRA_DB_APPLICATION_TOKEN");
    String astraApiEndpoint = System.getenv("ASTRA_DB_API_ENDPOINT");

    // Initialize the client
    DataAPIClient client = new DataAPIClient(astraToken);
    System.out.println("Connected to AstraDB");

    Database db = client.getDatabase(astraApiEndpoint);
    System.out.println("Connected to Database.");
  }
}

Connect with the Java client

Prerequisites

Install the Java client

Connect to a vector-enabled Astra DB Serverless database

See also

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