Class: Appsignal::Hooks::UnicornHook Private

Inherits:
Hook show all
Defined in:
lib/appsignal/hooks/unicorn.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Method Summary collapse

Methods inherited from Hook

#initialize, #installed?, register, #try_to_install

Constructor Details

This class inherits a constructor from Appsignal::Hooks::Hook

Instance Method Details

#dependencies_present? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/appsignal/hooks/unicorn.rb', line 9

def dependencies_present?
  defined?(::Unicorn::HttpServer) &&
    defined?(::Unicorn::Worker)
end

#install ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/appsignal/hooks/unicorn.rb', line 14

def install
  # Make sure that appsignal is started and the last transaction
  # in a worker gets flushed.
  #
  # We'd love to be able to hook this into Unicorn in a less
  # intrusive way, but this is the best we can do given the
  # options we have.

  ::Unicorn::HttpServer.class_eval do
    alias worker_loop_without_appsignal worker_loop

    def worker_loop(worker)
      Appsignal.forked
      worker_loop_without_appsignal(worker)
    end
  end

  ::Unicorn::Worker.class_eval do
    alias close_without_appsignal close

    def close
      Appsignal.stop("unicorn")
      close_without_appsignal
    end
  end
end