Packages

appsignal

1.9.1
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Collects error and performance data from your Elixir applications and sends it to AppSignal

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appsignal lib appsignal phoenix template_instrumenter.ex
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lib/appsignal/phoenix/template_instrumenter.ex

if Appsignal.phoenix?() do
defmodule Appsignal.Phoenix.TemplateInstrumenter do
@moduledoc """
Instrument Phoenix template engines
As documented in the [phoenix
guidelines](http://docs.appsignal.com/elixir/integrations/phoenix.html),
The AppSignal Elixir library comes with default template engines to
instrument renders to `.eex` and `.exs` template files.
When you use another template engine in your Phoenix project, you
can create a module which wraps the template renderer to also
instrument those template files.
To instrument the
[phoenix_markdown](https://github.com/boydm/phoenix_markdown)
library, you would create the following renderer engine module:
```
defmodule MyApp.InstrumentedMarkdownEngine do
use Appsignal.Phoenix.TemplateInstrumenter, engine: PhoenixMarkdown.Engine
endmodule
```
And then register the `.md` extension as a template as follows:
```
config :phoenix, :template_engines,
md: MyApp.InstrumentedMarkdownEngine
```
"""
@doc false
defmacro __using__(opts) do
quote do
@behaviour Phoenix.Template.Engine
def compile(path, name) do
expr = unquote(opts[:engine]).compile(path, name)
quote do
Appsignal.Instrumentation.Helpers.instrument(
self(),
"render.phoenix_template",
unquote(path),
fn -> unquote(expr) end
)
end
end
end
end
end
end