tree 9ef0028ad1c54cf6729086a9067813da9c9d641f
parent c15cd723ebabbab4825480032b56a2ddd9a8b76b
author Craig Tiller <ctiller@google.com> 1455771286 -0800
committer Craig Tiller <ctiller@google.com> 1455771286 -0800

Decouple filter selection from channel construction

Allow plugins to extend the set of filters used by gRPC core:
- plugins at construction time can register against the 'channel_init' system to be allowed to mutate a new channel_stack_builder type
- channel_stack_builder provides a central and rather dynamic place to construct the list of filters required by a channel stack
- ultimately we construct the channel stack in the fashion we always have

This is also a prerequisite step to allowing filters to be implemented from wrapped languages.