• Use CMAKE_INSTALL_LIBDIR (#291).
• Do not try to export template declaration in shared lib (#292).
• CMake: set min required C++ standard to C++11 (#293).
• Do not require rdkafka if it is static lib (#301).
• Removed min/max macros on windows (#302).
• Add dllexport front of HandleDeleter to fix link error in win dll usage (#305).
• Fix memory leak in producev (#307).
• Fix memory leak in get_member_id (#309).

Hotfix release

This only includes this one commit which fixes a compilation issue using a newer version of librdkafka.

This version breaks ABI compatibility, so make sure to rebuild your code after updating. As usual, thanks to all contributors!

Fixes

• Fixed windows compilation warnings (#157).
• Avoid re-ordering messages on produce failure in BufferedProducer (#153).
• Use CMAKE_STATIC_LIBRARY_* macros for FindRdKafka (#156).
• Don't leak messages in BufferedProducer::flush(timeout) (#150).
• Don't set log level to error in consumer/producer constructors (#136).
• Fix windows linker errors (#120).
• Don't use assert in BufferedProducer (#116).

New features

• Added message header support (#115). Thanks @accelerated for the effort put into this one in particular!
• Added queue full notification in BufferedProducer (#149).
• Allow constructing Buffers via raw arrays (#140) and (#147).
• Added flush/produce termination callbacks in BufferedProducer (#148).
• Allow constructing Buffers via std::array (#138 and #142).
• Added support for rd_kafka_conf_set_events and rd_kafka_message_status (#134).
• Added support for rdkafka events (#125).
• Allow using std::chrono::time_point as a timestamp in MessageBuilder (#128).
• Allow using allocators in Consumer::poll_batch (#118).

This version breaks ABI compatibility, so make sure to rebuild your code after updating. Eventually I hope we can commit to not breaking the ABI but that will probably be after release 1.0.

Fixes

• Miscellaneous Windows build fixes.
• Don't allow constructing a Buffer with a null payload and a size > 0 (#88)
• Make BufferedProducer thread safe (#72)
• Log error in case consumer destruction throws (#61)
• Stop using deprecated rdkafka function rd_kafka_errno2err (#47)
• Explicitly destroy callbacks on Consumer upon object destruction (#39)
• Various build system fixes

New features

• Allow using a timeout on BufferedProducer::flush and BufferedProducer::wait_for_acks (#86)
• Add pause/resume on Producer (#87)
• Check per topic/partition errors on API calls that return topic partition handle lists (#90)
• Allow forcing to use an rdkafka static library archive (#94)
• Several BufferedProducer enhancements and fixes that make it more reliable (#78, #79, #91)
• Added round robin poller (#63)
• Prevent throwing exception on rdkafka callbacks (#74)
• Allow Metadata objects to be non-owning (#73)
• Allow pausing/resuming consumption on a whole topic (#67)
• Add wrapper for rd_kafka_yield (#64)
• Move tests to use Catch2 rather than googletest (#56)
• Include a top level cppkafka.h header file (#59)
• Allow disabling build of tests (#51)
• Add Consumer::poll_batch
• Add BackoffPerformer class
• Add ConsumerDispatcher class.

Thanks to everyone who contributed to this version, especially @accelerated who wrote a major part of the code in this release.

Features:

• Support for rdkafka's high level consumer API
• Kafka producer
• Fetching metadata (broker, topics, etc).
• Fetching consumer group information
• Buffered producer support
• Compacted topic consumer support