Module: Datadog::Contrib::ActionView::Patcher

Includes:
Patcher
Defined in:
lib/ddtrace/contrib/action_view/patcher.rb

Overview

Patcher enables patching of ActionView module.

Class Method Summary collapse

Methods included from Patcher

included

Class Method Details

.patch ⇒ Object 



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# File 'lib/ddtrace/contrib/action_view/patcher.rb', line 23

def patch
  patch_renderer
end

.patch_renderer ⇒ Object 



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# File 'lib/ddtrace/contrib/action_view/patcher.rb', line 27

def patch_renderer
  if target_version >= Gem::Version.new('4.0.0')
    Events.subscribe!
  elsif defined?(::ActionView::TemplateRenderer) && defined?(::ActionView::PartialRenderer)
    # Rails < 4 compatibility:
    #  Rendering events are not nested in this version, creating
    #  render_partial spans outside of the parent render_template span.
    #  We fall back to manual patching instead.
    ::ActionView::TemplateRenderer.prepend(Instrumentation::TemplateRenderer::RailsLessThan4)
    ::ActionView::PartialRenderer.prepend(Instrumentation::PartialRenderer::RailsLessThan4)
  elsif defined?(::ActionView::Rendering) && defined?(::ActionView::Partials::PartialRenderer)
    # NOTE: Rails < 3.1 compatibility: different classes are used
    ::ActionView::Rendering.prepend(Instrumentation::TemplateRenderer::Rails30)
    ::ActionView::Partials::PartialRenderer.prepend(Instrumentation::PartialRenderer::RailsLessThan4)
  else
    Datadog.logger.debug('Expected Template/Partial classes not found; template rendering disabled')
  end
end

.target_version ⇒ Object 



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# File 'lib/ddtrace/contrib/action_view/patcher.rb', line 19

def target_version
  Integration.version
end