[[extending_core_components]]
== Extending Core Components
We decided to make this client low-level, and as such we probably have not implemented all the features you are looking for. For this reason, we made extending or even replacing the core components simple.

=== Connection
Coming Soon

=== ConnectionPool
Coming Soon

=== Log
see <<logging>>.

=== Client/API
The Client's only real purpose (as you may be able to tell from client.js) is to hold the API methods, set a few default values, and instantiate the transport. The transport is where all the networking, retry, and cluster discovery takes place and including it in your client is as simple as `transport = new es.Transport({});`. This way, you can benefit from the core features of our client.

NOTE: In the near future the entire transport level will be abstracted into a separate module, as well as the API.