Connecting cassandra cluster through scala

Question

I am new in both scala and cassandra . I know the connectivity of cassandra with java using hector . But I don\'t know how to connect cassandra through scala. I want a simple ex

Answer 1

I am using the datastax java driver. It's development is still active on github. I looked at Hector earlier but it seemed dying. The doc here's helpful: http://www.datastax.com/documentation/developer/java-driver/1.0/webhelp/index.html#java-driver/quick_start/qsQuickstart_c.html. I translated the first example to scala. Also, look at the akka-cassandra example from typesafe activator. Cheers.

object Hello extends App {

  import com.datastax.driver.core.Cluster;
  import com.datastax.driver.core.Host;
  import com.datastax.driver.core.Metadata;
  import scala.collection.JavaConversions._

  var cluster: Cluster = null
  private var session: Session = null

  def connect(node: String) {
    cluster = Cluster.builder().addContactPoint(node).build()
    val metadata = cluster.getMetadata()
    printf("Connected to cluster: %s\n",
      metadata.getClusterName())
    metadata.getAllHosts() map {
      case host =>
        printf("Datatacenter: %s; Host: %s; Rack: %s\n",
          host.getDatacenter(), host.getAddress(), host.getRack())
    }
  }

  def close() {
    cluster.shutdown()
  }

  this.connect("127.0.0.1");
  this.close();
}