subsys/kafka/src/main/java/org/commonjava/indy/subsys/kafka/IndyKafkaProducer.java
public void send( String topic, String message ) throws IOException
    {
        send( topic, message, null );
    }
public void send( String topic, String message ) throws IOException
    {
        send( topic, message, null );
    }
Non-blocking send. The message will not be really available to consumers until flush()
or close() is called, or until another blocking send is called.