# apollo-tracing-ruby
**Repository Path**: mirrors_salsify/apollo-tracing-ruby
## Basic Information
- **Project Name**: apollo-tracing-ruby
- **Description**: Ruby implementation of GraphQL trace data in the Apollo Tracing format
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-19
- **Last Updated**: 2026-02-28
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# Apollo Tracing
[](https://travis-ci.org/uniiverse/apollo-tracing-ruby)
[](https://rubygems.org/gems/apollo-tracing)
Ruby implementation of [GraphQL](https://github.com/rmosolgo/graphql-ruby) trace data in the [Apollo Tracing](https://github.com/apollographql/apollo-tracing) format.
## Contents
* [Installation](#installation)
* [Usage](#usage)
* [Tracing](#tracing)
* [Engine Proxy](#engine-proxy)
* [Development](#development)
* [Contributing](#contributing)
* [License](#license)
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'apollo-tracing'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install apollo-tracing
## Usage
Define a GraphQL schema:
```ruby
# Define a type
PostType = GraphQL::ObjectType.define do
name "Post"
field :id, !types.ID
field :title, !types.String
end
# Define a query
QueryType = GraphQL::ObjectType.define do
name "Query"
field :posts, !types[PostType] do
argument :user_id, !types.ID
resolve ->(obj, args, ctx) { Post.where(user_id: args[:user_id]) }
end
end
# Define a schema
Schema = GraphQL::Schema.define do
query QueryType
end
# Execute query
query = "
query($user_id: ID!) {
posts(user_id: $user_id) {
id
title
}
}
"
Schema.execute(query, variables: { user_id: 1 })
```
### Tracing
Add 'ApolloTracing' to your schema:
require "apollo/tracing"
Schema = GraphQL::Schema.define do
query QueryType
use ApolloTracing.new
end
Now your response should look something like:
```
{
"data":{
"posts":[
{
"id":"1",
"title":"Post Title"
}
]
},
"extensions":{
"tracing":{
"version":1,
"startTime":"2017-08-25T19:55:04.821Z",
"endTime":"2017-08-25T19:55:04.823Z",
"duration":1702785,
"execution":{
"resolvers":[
{
"path":[
"posts"
],
"parentType":"Query",
"fieldName":"posts",
"returnType":"[Post!]!",
"startOffset":1451015,
"duration":15735
},
{
"path":[
"posts",
0,
"id"
],
"parentType":"Post",
"fieldName":"id",
"returnType":"ID!",
"startOffset":1556873,
"duration":6914
},
{
"path":[
"posts",
0,
"title"
],
"parentType":"Post",
"fieldName":"title",
"returnType":"String!",
"startOffset":1604795,
"duration":4053
},
{
"path":[
"posts",
0,
"user_id"
],
"parentType":"Post",
"fieldName":"user_id",
"returnType":"ID!",
"startOffset":1642942,
"duration":3814
}
]
}
}
}
}
```
### Engine Proxy
Now you can start using the [Apollo Engine](https://www.apollographql.com/engine/) service.
Here is the general architecture overview of a sidecar mode – Proxy runs next to your application server:
```
----------------- request ----------------- request -----------------
| | -----------> | | -----------> | |
| Client | | Engine Proxy | | Application |
| | <----------- | | <----------- | |
----------------- response ----------------- response -----------------
|
|
GraphQL tracing | from response
|
˅
-----------------
| |
| Apollo Engine |
| |
-----------------
```
`ApolloTracing` gem comes with the [Apollo Engine Proxy](https://www.apollographql.com/docs/engine/index.html#engine-proxy) binary written in Go.
To configure the Proxy create a Proxy config file:
```
# config/apollo-engine-proxy.json
{
"apiKey": "service:YOUR_ENGINE_API_KEY",
"logging": { "level": "INFO" },
"origins": [{
"http": { "url": "http://localhost:3000/graphql" }
}],
"frontends": [{
"host": "localhost", "port": 3001, "endpoints": ["/graphql"]
}]
}
```
* `apiKey` – get this on your [Apollo Engine](https://engine.apollographql.com/) home page.
* `logging.level` – a log level for the Proxy ("INFO", "DEBUG" or "ERROR").
* `origins` – a list of URLs with your GraphQL endpoints in the Application.
* `frontends` – an address on which the Proxy will be listening.
To run the Proxy as a child process, which will be automatically terminated if the Application proccess stoped, add the following line to the `config.ru` file:
# config.ru – this file is used by Rack-based servers to start the application
require File.expand_path('../config/environment', __FILE__)
ApolloTracing.start_proxy('config/apollo-engine-proxy.json')
# or pass a JSON string:
# ApolloTracing.start_proxy('{"apiKey": "KEY", ...}')
run Your::Application
For example, if you use [rails](https://github.com/rails/rails) with [puma](https://github.com/puma/puma) application server and run it like:
```
bundle exec puma -w 2 -t 16 -p 3000
```
The proccess tree may look like:
```
---------------
| Puma Master |
| Port 3000 |
---------------
| |
---------- ----------
| | ----------------
˅ -> | Puma Worker1 |
---------------- | -----------------
| Engine Proxy | | ----------------
| Port 3001 | -> | Puma Worker2 |
---------------- ----------------
```
Now you can send requests to the reverse Proxy `http://localhost:3001`.
It'll proxy any (GraphQL and non-GraphQL) requests to the Application `http://localhost:3000`.
If the request matches the endpoints described in `origins`, it'll strip the `tracing` data from the response and will send it to the Apollo Engine service.
## Development
After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/uniiverse/apollo-tracing-ruby. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
## License
The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).