Working full example of a working composite type for row keys.

Working.java

import java.util.Arrays;

import me.prettyprint.cassandra.model.HColumnImpl;
import me.prettyprint.cassandra.serializers.CompositeSerializer;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.utils.TimeUUIDUtils;
import me.prettyprint.hector.api.Cluster;
import me.prettyprint.hector.api.Keyspace;
import me.prettyprint.hector.api.beans.Composite;
import me.prettyprint.hector.api.ddl.ColumnFamilyDefinition;
import me.prettyprint.hector.api.ddl.ComparatorType;
import me.prettyprint.hector.api.ddl.KeyspaceDefinition;
import me.prettyprint.hector.api.factory.HFactory;
import me.prettyprint.hector.api.mutation.Mutator;

public class HectorTest {

	public static String keyspaceName = "ApplicationSpace3",
			columnFamilyName = "TheFamily";

	public static void main(String... args) {
		// Step 1: Create a cluster
		Cluster cluster = HFactory.getOrCreateCluster("Test Cluster",
				"192.168.2.38:9160");

		KeyspaceDefinition keyspaceDef = cluster.describeKeyspace(keyspaceName);
		if (keyspaceDef == null) {
			// Step 2: Create the schema
			ColumnFamilyDefinition cfd = HFactory.createColumnFamilyDefinition(
					keyspaceName, columnFamilyName,
					ComparatorType.UTF8TYPE);

			//cfd.setComparatorTypeAlias("(TimeUUIDType,UTF8Type)");
			cfd.setKeyValidationClass("CompositeType(TimeUUIDType,UTF8Type)"); // for row keys
			cfd.setDefaultValidationClass(ComparatorType.UTF8TYPE
					.getClassName());

			KeyspaceDefinition myKs = HFactory.createKeyspaceDefinition(
					keyspaceName, "SimpleStrategy", 2,
					Arrays.asList(cfd));

			// Step 3: Add schema to the cluster
			cluster.addKeyspace(myKs, true);
		}
		Keyspace ksp = HFactory.createKeyspace(keyspaceName, cluster);
		
		Mutator<Composite> mutator = HFactory.createMutator(ksp, CompositeSerializer.get());
	    
		
	    HColumnImpl<String, String> column = new HColumnImpl<String, String>(StringSerializer.get(), StringSerializer.get());
	    column.setClock(ksp.createClock());
	    
	    Composite rowKey = new Composite();
	    rowKey.add(0, TimeUUIDUtils.getUniqueTimeUUIDinMillis());
	    rowKey.add(1, "email@example.com");
	    
	    column.setName("email");       
	    column.setValue("email@example.com");
	    
	    mutator.insert(rowKey, columnFamilyName, column);

	}
}