LEAD-260 FileChannelImpl.open added parameter String, so added here.
LEAD-260 FileChannelImpl.open added parameter String, so change. change file descriptor to reference cassandra file descriptor. still has a todo.
LEAD-260 initial implement method read(ByteBuffer) as this method is reference by project elasticsearchOnCassandra
LEAD-260 initial dependency required during FileChannelImpl.read(ByteBuffer)