Module: EventHub::Helper

Included in:
ActorHeartbeat, ActorListenerAmqp, ActorListenerHttp, ActorPublisher, ActorWatchdog, Configuration, Message, Processor2
Defined in:
lib/eventhub/helper.rb

Overview

Helper module

Instance Method Summary collapse

Instance Method Details

#bunny_connection_options ⇒ Object 



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# File 'lib/eventhub/helper.rb', line 25

def bunny_connection_options
  server = EventHub::Configuration.server

  protocol = "amqp"
  connection_properties = {}
  connection_properties[:user] = server[:user]
  connection_properties[:pass] = server[:password]
  connection_properties[:vhost] = server[:vhost]

  # inject bunny logs on request
  unless server[:show_bunny_logs]
    connection_properties[:logger] = Logger.new(File::NULL)
  end

  # Bunny's network recovery: re-establish connection, re-open channels,
  # re-declare queues, and re-register consumers transparently after a
  # broker disconnect (heartbeat miss, broker restart, LB drop).
  connection_properties[:automatically_recover] = true
  connection_properties[:network_recovery_interval] = 5
  connection_properties[:recovery_attempts] = nil
  connection_properties[:continuation_timeout] = 15_000

  # Belt-and-suspenders: if recovery_attempts is ever capped, escalate to
  # a Celluloid actor restart instead of going silent.
  connection_properties[:recovery_attempts_exhausted] = lambda do
    EventHub.logger.error("Bunny recovery attempts exhausted - actor will restart")
    actor = Celluloid::Actor[:actor_listener_amqp]
    actor&.async&.restart
  end

  # do we do tls?
  if server[:tls]
    protocol = "amqps"
    connection_properties[:tls] = server[:tls]
    connection_properties[:tls_cert] = server[:tls_cert]
    connection_properties[:tls_key] = server[:tls_key]
    connection_properties[:tls_ca_certificates] = server[:tls_ca_certificates]
    connection_properties[:verify_peer] = server[:verify_peer]
  end

  connection_string = "#{protocol}://#{server[:host]}:#{server[:port]}"
  [connection_string, connection_properties]
end

#create_bunny_connection ⇒ Object 



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# File 'lib/eventhub/helper.rb', line 20

def create_bunny_connection
  connection_string, connection_properties = bunny_connection_options
  Bunny.new(connection_string, connection_properties)
end

#get_name_from_class(instance) ⇒ Object

Examples: EventHub::Namespace::Demo => namespace.demo EventHub::NameSpace::Demo => name_space.demo EventHub::NameSpace::DemoProcessor => name_space.demo_processor NameSpace::Demo => name_space.demo



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# File 'lib/eventhub/helper.rb', line 13

def get_name_from_class(instance)
  instance.class.to_s.split("::").map { |element|
    next if element == "EventHub"
    element.split(/(?=[A-Z])/).join("_").downcase
  }.compact.join(".")
end

#now_stamp(now = nil) ⇒ Object

Formats stamp into UTC format



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# File 'lib/eventhub/helper.rb', line 70

def now_stamp(now = nil)
  now ||= Time.now
  now.utc.strftime("%Y-%m-%dT%H:%M:%S.%6NZ")
end

#stringify_keys(h) ⇒ Object

stringify hash keys



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# File 'lib/eventhub/helper.rb', line 76

def stringify_keys(h)
  JSON.parse(h.to_json)
end