astra.astra-db-java.1.5.0.source-code.overview.html Maven / Gradle / Ivy

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    Java Client Library for DataAPI


Overview

 This client library provides a simplified way to interact with Data API with DataStax AstraDB or local deployments ( Stargate + Cassandra). 
More resources can be found:
 
    In Datastax Astra Client documentation page
    In the   github repository with an {@code examples}  section. 


Installation

For Maven, add the following dependency to your pom.xml:
<dependency>
  <groupId>com.datastax.astra</groupId>
  <artifactId>astra-db-java</artifactId>
  <version>1.0.0-SNAPSHOT</version>
</dependency>


QuickStart
import com.datastax.astra.client.DataAPIClient;
import com.datastax.astra.client.Collection;
import com.datastax.astra.client.Database;
import com.datastax.astra.client.model.Document;
import com.datastax.astra.client.model.FindIterable;
import java.util.List;
import static com.datastax.astra.client.model.Filters.eq;
import static com.datastax.astra.client.model.SimilarityMetric.cosine;

public class GettingStarted {
 public static void main(String[] args) {
  // Initializing client with a token
  DataAPIClient client = new DataAPIClient("my_token");

  // Accessing the Database through the HTTP endpoint
  Database db = client.getDatabase("http://db-region.apps.astra.datastax.com");

  // Create collection with vector support
  Collection<Document> col = db.createCollection("demo", 2, cosine);

  // Insert documents with embeddings
  col.insertMany(List.of(
   new Document("doc1").vector(new float[]{.1f, 0.2f}).append("key", "value1"),
   new Document().id("doc2").vector(new float[]{.2f, 0.4f}).append("hello", "world"),
   new Document("doc3").vector(new float[]{.5f, 0.6f}).append("key", "value1"))
  );

  // Semantic Search with metadata filtering
  FindIterable<Document> docs = col.find(
    eq("key", "value1"), // metadata filter
    new float[] {.5f, .5f},              //vector
    10);                                 // maxRecord

  // Iterate over and print your results
  for (Document doc : docs) System.out.println(doc);
 }
}