Poseidon is a Kafka client. Poseidon only supports the 0.8 API and above.
Until 1.0.0 this should be considered ALPHA software and not neccessarily production ready.
Installing a Kafka broker locally
Follow the instructions on the Kafka wiki to build Kafka 0.8 and get a test broker up and running.
Sending messages to Kafka
require 'poseidon' producer = Poseidon::Producer.new(["localhost:9092"], "my_test_producer") messages =  messages << Poseidon::MessageToSend.new("topic1", "value1") messages << Poseidon::MessageToSend.new("topic2", "value2") producer.send_messages(messages)
More detailed Poseidon::Producer documentation.
Fetching messages from Kafka
require 'poseidon' consumer = Poseidon::PartitionConsumer.new("my_test_consumer", "localhost", 9092, "topic1", 0, :earliest_offset) loop do messages = consumer.fetch messages.each do |m| puts m.value end end
More detailed Poseidon::PartitionConsumer documentation.
Using snappy compression
To use snappy compression in your producers or consumers, install the snappy gem or simply add
gem 'snappy' to your project's Gemfile.
This gem follows SemVer. In particular, the public API should not be considered stable and anything may change without warning until Version 1.0.0. Additionally, for the purposes of the versioning the public API is everything documented in the public API docs.
- Ruby 1.9.3 or higher (1.9.2 and below not supported!!!)
- Kafka 0.8 or higher
In order to run integration tests you must specify a
KAFKA_PATH environment variable which points to a built Kafka installation. To build Kafka locally follow the instructions provided by the project.
# cd ~/src/poseidon/ # bundle # KAFKA_PATH=~/src/kafka bundle exec rake spec:all # run all unit and integration specs
The poseidon test suite will take care of spinning up and down the broker(s) needed for the integration tests.