Cassandra / Eclipse - Can't make connection - eclipse

Question

So I'm using Cassandra in my project and I have to make a connection between Eclipse and the data base. I tried to use a JDBC-compliant driver that I found on code.google.com but I'm getting this exception:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
This is my code:
package cassandrasampledriver;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.apache.cassandra.cql.jdbc.DriverResolverException;
import org.apache.cassandra.cql.jdbc.InvalidUrlException;
public class CassandraDriver
{
public static void main(String[] args) {
Connection con = null;
String KS = "cassandrademocql";
try
{
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
con = DriverManager.getConnection("jdbc:cassandra://localhost:9160/" + KS);
Statement stmt = con.createStatement();
String query = "DROP KEYSPACE cassandrademocql;";
ResultSet result = stmt.executeQuery(query);
}
catch (ClassNotFoundException e) {
e.printStackTrace();
}
catch (SQLException e) {
e.printStackTrace();
}
}
}
Thanks in advance :)

Answer 1

I ran your code using this cql driver (Version 1.1.2 compatible with cassandra 1.2.
on JDK6 without an Error. Maybe you are missing references in your classpath? The only problem with the code is that you are assigning a variable to a method call that wont return anything ResultSet result = stmt.executeQuery(query); and so a java.sql.SQLNonTransientException exception will be thrown.
You said you are new to Cassandra, just some friendly advice, I would do some research on the available APIs for Cassandra before making a choice.
These are the JARs I used
apache-cassandra-1.2.0-rc1-SNAPSHOT.jar
apache-cassandra-clientutil-1.2.0-rc1-SNAPSHOT.jar
apache-cassandra-thrift-1.2.0-rc1-SNAPSHOT.jar
cassandra-jdbc-1.1.2.jar libthrift-0.9.0.jar log4j-1.2.16.jar
log4j-over-slf4j-1.7.2.jar selenium-server-standalone-2.21.0.jar
slf4j-api-1.7.2.jar slf4j-simple-1.7.2.jar
Full code that I ran:
package cassandrasampledriver;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class CassandraDriver {
public static void main(String[] args) {
Connection con = null;
String KS = "cassandrademocql";
try
{
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
con = DriverManager.getConnection("jdbc:cassandra://localhost:9160/" + KS);
Statement stmt = con.createStatement();
String query = "DROP KEYSPACE cassandrademocql;";
// Because you are droping the KS this will not return anything
// So the result set will be null and a java.sql.SQLNonTransientException exception will be thrown every time.
ResultSet result = stmt.executeQuery(query);
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}