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finch-instrumentation (#115) 

* finch-instrumentation

* Span attributes update

* Readme update

* Readme update
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John Mauricio Carmona E 2022-11-09 14:27:40 -05:00 committed by GitHub
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3
.github/labeler.yml vendored
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@ -65,6 +65,9 @@ opentelemetry_process_propagator:
opentelemetry_redix:
- instrumentation/opentelemetry_redix/**/*
opentelemetry_finch:
- instrumentation/opentelemetry_finch/**/*
opentelemetry_telemetry:
- utilities/opentelemetry_telemetry/**/*

37
.github/workflows/elixir.yml vendored
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@ -146,6 +146,43 @@ jobs:
- name: Test
run: mix test
opentelemetry-finch:
needs: [test-matrix]
if: (contains(github.event.pull_request.labels.*.name, 'elixir') && contains(github.event.pull_request.labels.*.name, 'opentelemetry_finch'))
env:
app: 'opentelemetry_finch'
defaults:
run:
working-directory: instrumentation/${{ env.app }}
runs-on: ubuntu-18.04
name: Opentelemetry Finch test on Elixir ${{ matrix.elixir_version }} (OTP ${{ matrix.otp_version }})
strategy:
fail-fast: false
matrix: ${{ fromJson(needs.test-matrix.outputs.matrix) }}
steps:
- uses: actions/checkout@v2
- uses: erlef/setup-beam@v1
with:
otp-version: ${{ matrix.otp_version }}
elixir-version: ${{ matrix.elixir_version }}
rebar3-version: ${{ matrix.rebar3_version }}
- name: Cache
uses: actions/cache@v2
with:
path: |
~/deps
~/_build
key: ${{ runner.os }}-build-${{ matrix.otp_version }}-${{ matrix.elixir_version }}-v3-${{ hashFiles('**/mix.lock') }}
- name: Fetch deps
if: steps.deps-cache.outputs.cache-hit != 'true'
run: mix deps.get
- name: Compile project
run: mix compile --warnings-as-errors
- name: Check formatting
run: mix format --check-formatted
- name: Test
run: mix test
opentelemetry-telemetry:
needs: [test-matrix]
if: (contains(github.event.pull_request.labels.*.name, 'elixir') && contains(github.event.pull_request.labels.*.name, 'opentelemetry_telemetry'))

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instrumentation/opentelemetry_finch/.formatter.exs Normal file
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# Used by "mix format"
[
inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
]

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instrumentation/opentelemetry_finch/.gitignore vendored Normal file
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# The directory Mix will write compiled artifacts to.
/_build/
# If you run "mix test --cover", coverage assets end up here.
/cover/
# The directory Mix downloads your dependencies sources to.
/deps/
# Where third-party dependencies like ExDoc output generated docs.
/doc/
# Ignore .fetch files in case you like to edit your project deps locally.
/.fetch
# If the VM crashes, it generates a dump, let's ignore it too.
erl_crash.dump
# Also ignore archive artifacts (built via "mix archive.build").
*.ez
# Ignore package tarball (built via "mix hex.build").
opentelemetry_finch-*.tar

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instrumentation/opentelemetry_finch/CHANGELOG.md Normal file
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@ -0,0 +1,9 @@
# Changelog
## 0.2.0
* Span attributes update
## 0.1.0
* Initial release

201
instrumentation/opentelemetry_finch/LICENSE Normal file
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64
instrumentation/opentelemetry_finch/README.md Normal file
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# OpentelemetryFinch
OpentelemetryFinch uses [telemetry](https://hexdocs.pm/telemetry/) handlers to
create `OpenTelemetry` spans from Finch events.
## Installation
The package can be installed by adding `opentelemetry_finch` to your list of
dependencies in `mix.exs`:
```elixir
def deps do
[
{:opentelemetry_finch, "~> 0.1"}
]
end
```
In your application start:
```elixir
def start(_type, _args) do
OpentelemetryFinch.setup()
# ...
end
```
*Since this instrumentation is based on telemetry, it is not possible to automatically propagate the context in the http headers. If you need to perform context propagation, you should opt for manual instrumentation. Something like this:*
```elixir
require OpenTelemetry.Tracer, as: Tracer
Tracer.with_span "HTTP #{url}" do
headers = :otel_propagator_text_map.inject([])
with request <- Finch.build(:get, url, headers),
{:ok, response} <- Finch.request(request, HttpFinch) do
Tracer.set_attributes([
{"http.url", url},
{"http.method", request.method},
{"http.status_code", response.status}])
{:ok, response}
else
{:error, %{__exception__: true} = error} ->
Tracer.set_status(:error, Exception.message(error))
{:error, error}
end
end
```
## Compatibility Matrix
| OpentelemetryFinch Version | Otel Version | Notes |
| :------------------------- | :----------- | :---- |
| | | |
| v0.1.0 | v1.0.0 | |
Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
be found at [https://hexdocs.pm/opentelemetry_finch](https://hexdocs.pm/opentelemetry_finch).

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instrumentation/opentelemetry_finch/config/config.exs Normal file
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@ -0,0 +1,7 @@
import Config
try do
import_config "#{Mix.env()}.exs"
rescue
_ -> :ok
end

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instrumentation/opentelemetry_finch/config/test.exs Normal file
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@ -0,0 +1,4 @@
import Config
config :opentelemetry,
processors: [{:otel_simple_processor, %{}}]

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instrumentation/opentelemetry_finch/lib/opentelemetry_finch.ex Normal file
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@ -0,0 +1,78 @@
defmodule OpentelemetryFinch do
@moduledoc """
OpentelemetryFinch uses [telemetry](https://hexdocs.pm/telemetry/) handlers to
create `OpenTelemetry` spans.
## Usage
In your application start:
def start(_type, _args) do
OpentelemetryFinch.setup()
# ...
end
"""
require OpenTelemetry.Tracer
@typedoc "Setup options"
@type opts :: []
@doc """
Initializes and configures the telemetry handlers.
"""
@spec setup(opts()) :: :ok
def setup(_opts \\ []) do
:telemetry.attach(
{__MODULE__, :request_stop},
[:finch, :request, :stop],
&__MODULE__.handle_request_stop/4,
%{}
)
end
@doc false
def handle_request_stop(_event, measurements, meta, _config) do
duration = measurements.duration
end_time = :opentelemetry.timestamp()
start_time = end_time - duration
status =
case meta.result do
{:ok, response} -> response.status
_ -> 0
end
url = build_url(meta.request.scheme, meta.request.host, meta.request.port, meta.request.path)
attributes = %{
"http.url": url,
"http.scheme": meta.request.scheme,
"net.peer.name": meta.request.host,
"net.peer.port": meta.request.port,
"http.target": meta.request.path,
"http.method": meta.request.method,
"http.status_code": status,
}
s =
OpenTelemetry.Tracer.start_span("HTTP #{meta.request.method}", %{
start_time: start_time,
attributes: attributes,
kind: :client
})
if meta.result |> elem(0) == :error do
OpenTelemetry.Span.set_status(s, OpenTelemetry.status(:error, format_error(meta.result |> elem(1))))
end
OpenTelemetry.Span.end_span(s)
end
defp build_url(scheme, host, port, path), do: "#{scheme}://#{host}:#{port}#{path}"
defp format_error(%{__exception__: true} = exception), do: Exception.message(exception)
defp format_error(reason), do: inspect(reason)
end

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defmodule OpentelemetryFinch.MixProject do
use Mix.Project
def project do
[
app: :opentelemetry_finch,
description: description(),
version: "0.2.0",
elixir: "~> 1.10",
start_permanent: Mix.env() == :prod,
deps: deps(),
elixirc_paths: elixirc_paths(Mix.env()),
package: package(),
source_url:
"https://github.com/open-telemetry/opentelemetry-erlang-contrib/tree/main/instrumentation/opentelemetry_finch"
]
end
defp description do
"Trace Finch request with OpenTelemetry."
end
defp package do
[
files: ~w(lib .formatter.exs mix.exs README* LICENSE* CHANGELOG*),
licenses: ["Apache-2.0"],
links: %{
"GitHub" =>
"https://github.com/open-telemetry/opentelemetry-erlang-contrib/tree/main/instrumentation/opentelemetry_finch",
"OpenTelemetry Erlang" => "https://github.com/open-telemetry/opentelemetry-erlang",
"OpenTelemetry Erlang Contrib" =>
"https://github.com/open-telemetry/opentelemetry-erlang-contrib",
"OpenTelemetry.io" => "https://opentelemetry.io"
}
]
end
def application do
[
extra_applications: [:logger]
]
end
defp elixirc_paths(:test), do: ["lib", "test/support"]
defp elixirc_paths(_), do: ["lib"]
defp deps do
[
{:telemetry, "~> 0.4 or ~> 1.0"},
{:opentelemetry_api, "~> 1.0"},
{:opentelemetry, "~> 1.0", only: [:dev, :test]},
{:opentelemetry_exporter, "~> 1.0", only: [:dev, :test]},
{:ex_doc, "~> 0.29.0", only: [:dev], runtime: false},
{:finch, "~> 0.13", only: [:dev, :test]},
{:dialyxir, "~> 1.2", only: [:dev, :test], runtime: false},
{:bypass, "~> 2.0", only: :test}
]
end
end

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%{
"acceptor_pool": {:hex, :acceptor_pool, "1.0.0", "43c20d2acae35f0c2bcd64f9d2bde267e459f0f3fd23dab26485bf518c281b21", [:rebar3], [], "hexpm", "0cbcd83fdc8b9ad2eee2067ef8b91a14858a5883cb7cd800e6fcd5803e158788"},
"bypass": {:hex, :bypass, "2.1.0", "909782781bf8e20ee86a9cabde36b259d44af8b9f38756173e8f5e2e1fabb9b1", [:mix], [{:plug, "~> 1.7", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.0", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:ranch, "~> 1.3", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm", "d9b5df8fa5b7a6efa08384e9bbecfe4ce61c77d28a4282f79e02f1ef78d96b80"},
"castore": {:hex, :castore, "0.1.18", "deb5b9ab02400561b6f5708f3e7660fc35ca2d51bfc6a940d2f513f89c2975fc", [:mix], [], "hexpm", "61bbaf6452b782ef80b33cdb45701afbcf0a918a45ebe7e73f1130d661e66a06"},
"chatterbox": {:hex, :ts_chatterbox, "0.11.0", "b8f372c706023eb0de5bf2976764edb27c70fe67052c88c1f6a66b3a5626847f", [:rebar3], [{:hpack, "~>0.2.3", [hex: :hpack_erl, repo: "hexpm", optional: false]}], "hexpm", "722fe2bad52913ab7e87d849fc6370375f0c961ffb2f0b5e6d647c9170c382a6"},
"cowboy": {:hex, :cowboy, "2.9.0", "865dd8b6607e14cf03282e10e934023a1bd8be6f6bacf921a7e2a96d800cd452", [:make, :rebar3], [{:cowlib, "2.11.0", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, "1.8.0", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm", "2c729f934b4e1aa149aff882f57c6372c15399a20d54f65c8d67bef583021bde"},
"cowboy_telemetry": {:hex, :cowboy_telemetry, "0.4.0", "f239f68b588efa7707abce16a84d0d2acf3a0f50571f8bb7f56a15865aae820c", [:rebar3], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "7d98bac1ee4565d31b62d59f8823dfd8356a169e7fcbb83831b8a5397404c9de"},
"cowlib": {:hex, :cowlib, "2.11.0", "0b9ff9c346629256c42ebe1eeb769a83c6cb771a6ee5960bd110ab0b9b872063", [:make, :rebar3], [], "hexpm", "2b3e9da0b21c4565751a6d4901c20d1b4cc25cbb7fd50d91d2ab6dd287bc86a9"},
"ctx": {:hex, :ctx, "0.6.0", "8ff88b70e6400c4df90142e7f130625b82086077a45364a78d208ed3ed53c7fe", [:rebar3], [], "hexpm", "a14ed2d1b67723dbebbe423b28d7615eb0bdcba6ff28f2d1f1b0a7e1d4aa5fc2"},
"dialyxir": {:hex, :dialyxir, "1.2.0", "58344b3e87c2e7095304c81a9ae65cb68b613e28340690dfe1a5597fd08dec37", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "61072136427a851674cab81762be4dbeae7679f85b1272b6d25c3a839aff8463"},
"earmark_parser": {:hex, :earmark_parser, "1.4.29", "149d50dcb3a93d9f3d6f3ecf18c918fb5a2d3c001b5d3305c926cddfbd33355b", [:mix], [], "hexpm", "4902af1b3eb139016aed210888748db8070b8125c2342ce3dcae4f38dcc63503"},
"erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
"ex_doc": {:hex, :ex_doc, "0.29.0", "4a1cb903ce746aceef9c1f9ae8a6c12b742a5461e6959b9d3b24d813ffbea146", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "f096adb8bbca677d35d278223361c7792d496b3fc0d0224c9d4bc2f651af5db1"},
"finch": {:hex, :finch, "0.13.0", "c881e5460ec563bf02d4f4584079e62201db676ed4c0ef3e59189331c4eddf7b", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: false]}, {:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.3", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 0.2.6", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "49957dcde10dcdc042a123a507a9c5ec5a803f53646d451db2f7dea696fba6cc"},
"gproc": {:hex, :gproc, "0.8.0", "cea02c578589c61e5341fce149ea36ccef236cc2ecac8691fba408e7ea77ec2f", [:rebar3], [], "hexpm", "580adafa56463b75263ef5a5df4c86af321f68694e7786cb057fd805d1e2a7de"},
"grpcbox": {:hex, :grpcbox, "0.14.0", "3eb321bcd2275baf8b54cf381feb7b0559a50c02544de28fda039c7f2f9d1a7a", [:rebar3], [{:acceptor_pool, "~>1.0.0", [hex: :acceptor_pool, repo: "hexpm", optional: false]}, {:chatterbox, "~>0.11.0", [hex: :ts_chatterbox, repo: "hexpm", optional: false]}, {:ctx, "~>0.6.0", [hex: :ctx, repo: "hexpm", optional: false]}, {:gproc, "~>0.8.0", [hex: :gproc, repo: "hexpm", optional: false]}], "hexpm", "e24159b7b6d3f9869bbe528845c0125fed2259366ba908fd04a1f45fe81d0660"},
"hpack": {:hex, :hpack_erl, "0.2.3", "17670f83ff984ae6cd74b1c456edde906d27ff013740ee4d9efaa4f1bf999633", [:rebar3], [], "hexpm", "06f580167c4b8b8a6429040df36cc93bba6d571faeaec1b28816523379cbb23a"},
"hpax": {:hex, :hpax, "0.1.2", "09a75600d9d8bbd064cdd741f21fc06fc1f4cf3d0fcc335e5aa19be1a7235c84", [:mix], [], "hexpm", "2c87843d5a23f5f16748ebe77969880e29809580efdaccd615cd3bed628a8c13"},
"makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
"makeup_elixir": {:hex, :makeup_elixir, "0.16.0", "f8c570a0d33f8039513fbccaf7108c5d750f47d8defd44088371191b76492b0b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "28b2cbdc13960a46ae9a8858c4bebdec3c9a6d7b4b9e7f4ed1502f8159f338e7"},
"makeup_erlang": {:hex, :makeup_erlang, "0.1.1", "3fcb7f09eb9d98dc4d208f49cc955a34218fc41ff6b84df7c75b3e6e533cc65f", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "174d0809e98a4ef0b3309256cbf97101c6ec01c4ab0b23e926a9e17df2077cbb"},
"mime": {:hex, :mime, "2.0.3", "3676436d3d1f7b81b5a2d2bd8405f412c677558c81b1c92be58c00562bb59095", [:mix], [], "hexpm", "27a30bf0db44d25eecba73755acf4068cbfe26a4372f9eb3e4ea3a45956bff6b"},
"mint": {:hex, :mint, "1.4.2", "50330223429a6e1260b2ca5415f69b0ab086141bc76dc2fbf34d7c389a6675b2", [:mix], [{:castore, "~> 0.1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "ce75a5bbcc59b4d7d8d70f8b2fc284b1751ffb35c7b6a6302b5192f8ab4ddd80"},
"nimble_options": {:hex, :nimble_options, "0.4.0", "c89babbab52221a24b8d1ff9e7d838be70f0d871be823165c94dd3418eea728f", [:mix], [], "hexpm", "e6701c1af326a11eea9634a3b1c62b475339ace9456c1a23ec3bc9a847bca02d"},
"nimble_parsec": {:hex, :nimble_parsec, "1.2.3", "244836e6e3f1200c7f30cb56733fd808744eca61fd182f731eac4af635cc6d0b", [:mix], [], "hexpm", "c8d789e39b9131acf7b99291e93dae60ab48ef14a7ee9d58c6964f59efb570b0"},
"nimble_pool": {:hex, :nimble_pool, "0.2.6", "91f2f4c357da4c4a0a548286c84a3a28004f68f05609b4534526871a22053cde", [:mix], [], "hexpm", "1c715055095d3f2705c4e236c18b618420a35490da94149ff8b580a2144f653f"},
"opentelemetry": {:hex, :opentelemetry, "1.0.2", "9ffa9ddcbec9356154681bc9d0a54bb20f0de0e8c6696ccc298b49633308782b", [:rebar3], [{:opentelemetry_api, "~> 1.0", [hex: :opentelemetry_api, repo: "hexpm", optional: false]}], "hexpm", "e774506333c8afd9133fee4ba69d06e6413ccad6ee76f10e59c3ec624009af23"},
"opentelemetry_api": {:hex, :opentelemetry_api, "1.0.2", "91353ee40583b1d4f07d7b13ed62642abfec6aaa0d8a2114f07edafb2df781c5", [:mix, :rebar3], [], "hexpm", "2a8247f85c44216b883900067478d59955d11e58e5cfca7c884cd4f203ace3ac"},
"opentelemetry_exporter": {:hex, :opentelemetry_exporter, "1.0.2", "19a102d1f04776399a915be27121852468318c27146e553faf28008e3e474972", [:rebar3], [{:grpcbox, ">= 0.0.0", [hex: :grpcbox, repo: "hexpm", optional: false]}, {:opentelemetry, "~> 1.0", [hex: :opentelemetry, repo: "hexpm", optional: false]}, {:opentelemetry_api, "~> 1.0", [hex: :opentelemetry_api, repo: "hexpm", optional: false]}, {:tls_certificate_check, "~> 1.11", [hex: :tls_certificate_check, repo: "hexpm", optional: false]}], "hexpm", "43de904dd7f482009bf1a40d591ab5ed25f603f1072a04a162e87f7f8c08dbb5"},
"plug": {:hex, :plug, "1.13.6", "187beb6b67c6cec50503e940f0434ea4692b19384d47e5fdfd701e93cadb4cc2", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug_crypto, "~> 1.1.1 or ~> 1.2", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "02b9c6b9955bce92c829f31d6284bf53c591ca63c4fb9ff81dfd0418667a34ff"},
"plug_cowboy": {:hex, :plug_cowboy, "2.5.2", "62894ccd601cf9597e2c23911ff12798a8a18d237e9739f58a6b04e4988899fe", [:mix], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:cowboy_telemetry, "~> 0.3", [hex: :cowboy_telemetry, repo: "hexpm", optional: false]}, {:plug, "~> 1.7", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "ea6e87f774c8608d60c8d34022a7d073bd7680a0a013f049fc62bf35efea1044"},
"plug_crypto": {:hex, :plug_crypto, "1.2.3", "8f77d13aeb32bfd9e654cb68f0af517b371fb34c56c9f2b58fe3df1235c1251a", [:mix], [], "hexpm", "b5672099c6ad5c202c45f5a403f21a3411247f164e4a8fab056e5cd8a290f4a2"},
"ranch": {:hex, :ranch, "1.8.0", "8c7a100a139fd57f17327b6413e4167ac559fbc04ca7448e9be9057311597a1d", [:make, :rebar3], [], "hexpm", "49fbcfd3682fab1f5d109351b61257676da1a2fdbe295904176d5e521a2ddfe5"},
"ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.6", "cf344f5692c82d2cd7554f5ec8fd961548d4fd09e7d22f5b62482e5aeaebd4b0", [:make, :mix, :rebar3], [], "hexpm", "bdb0d2471f453c88ff3908e7686f86f9be327d065cc1ec16fa4540197ea04680"},
"telemetry": {:hex, :telemetry, "1.1.0", "a589817034a27eab11144ad24d5c0f9fab1f58173274b1e9bae7074af9cbee51", [:rebar3], [], "hexpm", "b727b2a1f75614774cff2d7565b64d0dfa5bd52ba517f16543e6fc7efcc0df48"},
"tls_certificate_check": {:hex, :tls_certificate_check, "1.13.0", "c407200ca837df4e6cf533874e9c4c8bcde2e71520ab215856bdaec9c7fb9252", [:rebar3], [{:ssl_verify_fun, "1.1.6", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm", "b45a3117931b808fdaea580f6e7ed1a7889c171dae792e632a166d6dda6e88a2"},
}

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defmodule OpentelemetryFinchTest do
use ExUnit.Case, async: false
doctest OpentelemetryFinch
require OpenTelemetry.Tracer
require OpenTelemetry.Span
require Record
for {name, spec} <- Record.extract_all(from_lib: "opentelemetry/include/otel_span.hrl") do
Record.defrecord(name, spec)
end
for {name, spec} <- Record.extract_all(from_lib: "opentelemetry_api/include/opentelemetry.hrl") do
Record.defrecord(name, spec)
end
setup do
:otel_simple_processor.set_exporter(:otel_exporter_pid, self())
OpenTelemetry.Tracer.start_span("test")
on_exit(fn ->
OpenTelemetry.Tracer.end_span()
end)
{:ok, bypass: Bypass.open()}
end
test "records span on requests", %{bypass: bypass} do
Bypass.expect(bypass, fn conn -> Plug.Conn.resp(conn, 200, "") end)
OpentelemetryFinch.setup()
_conn = start_supervised!({Finch, name: HttpFinch})
{:ok, _} = Finch.build(:get, endpoint_url(bypass.port)) |> Finch.request(HttpFinch)
assert_receive {:span,
span(
name: "HTTP GET",
kind: :client,
attributes: attributes
)}
assert %{
"net.peer.name": "localhost",
"http.method": "GET",
"http.target": "/",
"http.scheme": :http,
"http.status_code": 200
} = :otel_attributes.map(attributes)
end
test "records span on requests failed", %{bypass: _} do
OpentelemetryFinch.setup()
_conn = start_supervised!({Finch, name: HttpFinch})
{:error, _} = Finch.build(:get, endpoint_url(3333)) |> Finch.request(HttpFinch)
assert_receive {:span,
span(
name: "HTTP GET",
kind: :client,
status: {:status, :error, "connection refused"},
attributes: attributes
)}
assert %{
"net.peer.name": "localhost",
"http.method": "GET",
"http.target": "/",
"http.scheme": :http,
"http.status_code": 0
} = :otel_attributes.map(attributes)
end
defp endpoint_url(port), do: "http://localhost:#{port}/"
end

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ExUnit.start()