# [develop](https://github.com/adhearsion/electric_slide) * Trigger an agent "presence change" callback when the agent is removed from the queue * Bugfix: Fix `NameError` exception when referencing namespaced constant `Adhearsion::Call::ExpiredError` in injected `Adhearsion::Call#active?` method * Provide Electric Slide with a way to check if a queue with a given set of attributes is valid/can be instantiated before Electric Slide adds it to the supervision group. The supervisor will crash if its attempt to create the queue raises an exception. * Add support for changing queue attributes * API Breakage: Setting queue connection type to an invalid value will now raise an `ElectricSlide::CallQueue::InvalidConnectionType` exception instead of `ArgumentError` * API Breakage: Setting queue agent return method to an invalid value will now raise an `ElectricSlide::CallQueue::InvalidRequeueMethod` exception instead of `ArgumentError` * List created queues by name via `ElectricSlide.queues_by_name` * Set `:agent` call variable on queued call when connecting calls * API Breakage: Queues must now be Celluloid actors responding to the standard actor API. `ElectricSlide::CallQueue.work` is removed in favour of `.new`. * API Breakage: Prevent an unqueued agent from being returned to the queue - this avoids calls after logging out * API Breakage: An agent's presence should be :after_call if they are not automatically returned to being available * API Breakage: Store queued/connected timestamps on calls * API Breakage: Remove abandoned calls from the queue * Set agent `#call` attribute to outbound call made to agent in :call mode * Prevent an agent from being added to the queue more than once * Added Travis CI configuration * Lots more test coverage - still bad # [0.2.0](https://github.com/adhearsion/electric_slide/compare/bb3b1b3e7f6d0926d0a9f462520e1f6d0c277adf...v0.2.0) - [2015-07-23](https://rubygems.org/gems/adhearsion/versions/0.2.0) * ¯\\_(ツ)_/¯