At this point, Khepri should be considered Beta. The API will likely evolve and future releases will likely introduce breaking changes.

What's new in Khepri 0.17.4

Improved keep_while conditions

The focus of this release was put on keep_while conditions and in particular, bugs and performance issues. These were discovered while working on topic exchanges in RabbitMQ.

The first bug is about child nodes of a deleted parent nodes missing from the returned result. The second one was leaked entries in the keep_while reverse index in the machine state. Both were addressed by #352.

The performance issues were related to the way we squash version bumps after the handling of keep_while conditions, and the way we handled many tree nodes expiring as part of the application of one machine command. See #353.

Other changes

Horus was updated from 0.3.1 to 0.3.2 (#354).

Download

Khepri is available from Hex.pm: https://hex.pm/packages/khepri/0.17.4

Upgrade

Using Rebar:

1. Update your rebar.config:

   %% In rebar.config
   {deps, [{khepri, "0.17.4"}]}.

2. Run rebar3 upgrade khepri.

Using Erlang.mk:

1. Update your Makefile:

   %% In your Makefile
   dep_khepri = hex 0.17.4

2. Remove the deps/khepri directory. The new version will be fetched the next time you build your project.

Documentation

The documentation for Khepri is available on Hex.pm.