Module: NewRelic::Agent::Instrumentation::Curb::Chain

Defined in:
lib/new_relic/agent/instrumentation/curb/chain.rb

Class Method Summary collapse

Class Method Details

.instrument! ⇒ Object

rubocop:disable Metrics/AbcSize



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# File 'lib/new_relic/agent/instrumentation/curb/chain.rb', line 10

def self.instrument! # rubocop:disable Metrics/AbcSize
  Curl::Easy.class_eval do
    include NewRelic::Agent::Instrumentation::Curb::Easy

    def http_head_with_newrelic(*args, &blk)
      http_head_with_tracing { http_head_without_newrelic(*args, &blk) }
    end

    alias_method(:http_head_without_newrelic, :http_head)
    alias_method(:http_head, :http_head_with_newrelic)

    def http_post_with_newrelic(*args, &blk)
      http_post_with_tracing { http_post_without_newrelic(*args, &blk) }
    end

    alias_method(:http_post_without_newrelic, :http_post)
    alias_method(:http_post, :http_post_with_newrelic)

    def http_put_with_newrelic(*args, &blk)
      http_put_with_tracing { http_put_without_newrelic(*args, &blk) }
    end

    alias_method(:http_put_without_newrelic, :http_put)
    alias_method(:http_put, :http_put_with_newrelic)

    # Hook the #http method to set the verb.
    def http_with_newrelic(verb)
      http_with_tracing(verb) { http_without_newrelic(verb) }
    end

    alias_method(:http_without_newrelic, :http)
    alias_method(:http, :http_with_newrelic)

    # Hook the #perform method to mark the request as non-parallel.
    def perform_with_newrelic
      perform_with_tracing { perform_without_newrelic }
    end

    alias_method(:perform_without_newrelic, :perform)
    alias_method(:perform, :perform_with_newrelic)

    # Record the HTTP verb for future #perform calls
    def method_with_newrelic(verb)
      method_with_tracing(verb) { method_without_newrelic(verb) }
    end

    alias_method(:method_without_newrelic, :method)
    alias_method(:method, :method_with_newrelic)

    # We override this method in order to ensure access to header_str even
    # though we use an on_header callback
    def header_str_with_newrelic
      header_str_with_tracing { header_str_without_newrelic }
    end

    alias_method(:header_str_without_newrelic, :header_str)
    alias_method(:header_str, :header_str_with_newrelic)
  end

  Curl::Multi.class_eval do
    include NewRelic::Agent::Instrumentation::Curb::Multi

    # Add CAT with callbacks if the request is serial
    def add_with_newrelic(curl)
      add_with_tracing(curl) { add_without_newrelic(curl) }
    end

    alias_method(:add_without_newrelic, :add)
    alias_method(:add, :add_with_newrelic)

    # Trace as an External/Multiple call if the first request isn't serial.
    def perform_with_newrelic(&blk)
      perform_with_tracing { perform_without_newrelic(&blk) }
    end

    alias_method(:perform_without_newrelic, :perform)
    alias_method(:perform, :perform_with_newrelic)
  end
end