Class: Karafka::Cli::Server

Inherits:
Base
  • Object
show all
Defined in:
lib/karafka/cli/server.rb

Overview

Server Karafka Cli action

Instance Attribute Summary

Attributes inherited from Base

#cli

Instance Method Summary collapse

Methods inherited from Base

bind_to, desc, #initialize, option

Constructor Details

This class inherits a constructor from Karafka::Cli::Base

Instance Method Details

#call ⇒ Object

Start the Karafka server



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# File 'lib/karafka/cli/server.rb', line 15

def call
  validate!

  puts 'Starting Karafka server'
  cli.info

  if cli.options[:daemon]
    FileUtils.mkdir_p File.dirname(cli.options[:pid])
    daemonize
  end

  # We assign active topics on a server level, as only server is expected to listen on
  # part of the topics
  Karafka::Server.consumer_groups = cli.options[:consumer_groups]

  # Remove pidfile on stop, just before the server instance is going to be GCed
  # We want to delay the moment in which the pidfile is removed as much as we can,
  # so instead of removing it after the server stops running, we rely on the gc moment
  # when this object gets removed (it is a bit later), so it is closer to the actual
  # system process end. We do that, so monitoring and deployment tools that rely on pids
  # won't alarm or start new system process up until the current one is finished
  ObjectSpace.define_finalizer(self, proc { send(:clean) })

  # After we fork, we can boot celluloid again
  Karafka::Server.run
end