Created
August 20, 2019 18:42
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class KafkaProducer | |
include Singleton | |
class << self | |
def assign_kafka | |
kafka = Kafka.new( | |
ENV.fetch('KAFKA_BROKERS').split(','), | |
sasl_scram_username: ENV['KAFKA_USERNAME'], | |
sasl_scram_password: ENV['KAFKA_PASSWORD'], | |
sasl_scram_mechanism: ENV['KAFKA_MECHANISM'], | |
ssl_ca_cert_file_path: tmp_ca_file.try(:path), | |
logger: Rails.logger | |
) | |
class_variable_set(:@@kafka, kafka) | |
assign_kafka_producer | |
end | |
def assign_kafka_producer | |
kafka = class_variable_get(:@@kafka) | |
kafka_producer = kafka.async_producer( | |
delivery_interval: 10, | |
) | |
class_variable_set(:@@kafka_producer, kafka_producer) | |
end | |
def tmp_ca_file | |
return unless ENV['KAFKA_TRUSTED_CERT'] | |
tmp_ca_file = Tempfile.new('kafka_ca_certs', "#{Rails.root.to_s}/tmp/") | |
tmp_ca_file.write(ENV.fetch("KAFKA_TRUSTED_CERT")) | |
tmp_ca_file.close | |
tmp_ca_file | |
end | |
def method_missing(message, *args, &block) | |
kafka = class_variable_get(:@@kafka) | |
kafka.send(message, *args) | |
end | |
end | |
assign_kafka | |
assign_kafka_producer | |
end | |
at_exit do | |
KafkaProducer.class_variable_get(:@@kafka_producer).shutdown | |
end |
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