TL;DR

Bunny 2.0.0 is released to rubygems.org.

2.0.0 is a minor feature and bug fix release that drops Ruby 1.9 and 1.8 support.

Changes between Bunny 1.7.0 and 2.0.0

Bunny 2.0 doesn’t have any breaking API changes but drops Ruby 1.8 and 1.9 (both EOL’ed) support, hence the version.

Minimum Required Ruby Version is 2.0

Bunny 2.0 requires Ruby 2.0 or later.

Non-Blocking Writes

Bunny now uses non-blocking socket writes, uses a reduced number of writes for message publishing (frames are batched into a single write), and handles TCP back pressure from RabbitMQ better.

Contributed by Irina Bednova and Michael Klishin.

Reduced Timeout Use

Bunny::ContinuationQueue#poll no longer relies on Ruby’s Timeout which has numerous issues, including starting a new “interruptor” thread per operation, which is far from efficient.

Contributed by Joe Eli McIlvain and Carl Hörberg.

Capped Number of Connection Recovery Attempts

:recovery_attempts is a new option that limits the number of connection recovery attempts performed by Bunny. nil means “no limit”.

Contributed by Irina Bednova.

Bunny::Channel#basic_ack and Related Methods Improvements

Bunny::Channel#basic_ack, Bunny::Channel#basic_nack, and Bunny::Channel#basic_reject now adjust delivery tags between connection recoveries, as well as have a default value for the second argument.

Contributed by Wayne Conrad.

Logger Output Remains Consistent

Setting the @logger.progname attribute changes the output of the logger. This is not expected behaviour when the client provides a custom logger. Behaviour remains unchainged when the internally initialized logger is used.

Contributed by Justin Carter.

prefetch_count is Limited to 65535

Since basic.qos’s prefetch_count field is of type short in the protocol, Bunny must enforce its maximum allowed value to 2^16 - 1 to avoid confusing issues due to overflow.

Per-Consumer and Per-Channel Prefetch

Recent RabbitMQ versions support basic.qos global flag, controlling whether prefetch applies per-consumer or per-channel. Bunny Channel#prefetch now allows flag to be set as optional parameter, with the same default behaviour as before (per-consumer).

Contributed by tiredpixel.

Full Change Log

Full change log can be found on GitHub.

About the Author

Michael maintains Bunny and several other RabbitMQ client libraries.