Async API Cli
CLI to fetch data on "todos" from a given API in a number of ways. Utilising some basic concurrency via worker pools to speed up multiple API calls.
Tool is centred around 3 core commands with additional arguments.
Architecture
A simplistic take on Clean without infra layer (this was an evening's efforts...). This enables additional adapters such as adding a HTTP layer - just add route handlers and the the app will return the same data without needing to modify the service or domain logic.
Docker Setup
Build
docker build . -t todo-cli
Run
docker run todo-cli -param=value
Commands
fetchall
Fetches entire list of results. Supports result limiting via -count argument.
docker run todo-cli -command=fetchall -count=10
fetchone
Fetches one result - requires -id argument.
docker run todo-cli -command=fetchone -id=20
fetchlist
Accepts an absolute file path (via -list argument). Uses worker pools to fetch results concurrently. data/sample.csv is the sample data.
Can be optimised a little further but is initially taking 2s to make 100 separate calls synchronously compared to ~500ms when fetched async using worker pools.
docker run todo-cli -command=fetchlist -list=/build/data/sample.csv
Result format
Simple logging output. Example:
INFO[0000] Response received completed=true id=22 title="distinctio vitae autem nihil ut molestias quo" userId=2
INFO[0000] Response received completed=false id=53 title="qui labore est occaecati recusandae aliquid quam" userId=3
INFO[0000] Response received completed=false id=31 title="repudiandae totam in est sint facere fuga" userId=2
INFO[0000] Response received completed=false id=68 title="aut id perspiciatis voluptatem iusto" userId=4
Error format
ERRO[0000] No results found for id: 2323 command=fetchone
Structure
/
│
└───cmd/cli/
│ main.go *main entry point*
│
└───internal/
│ │
│ └───domain/ *domain structs*
│ │ │
│ │ └───model/
│ │ │ todo.go
│ │ │
│ │ └───repository/
│ │ todo_repository.go *repository structs w/ infra*
│ │
│ └───handlers/cli/ *handlers for entry point adapters*
│ │ cli.go
│ │
│ └───services/ *services distributing domain logic*
│ reader.go *reader - really this isn't a service and should be relocated*
│ todo.go *main todo service*
│ │
│ └───utils/
│ request.go *simple HTTP request manager - no auth etc*
│
│ Dockerfile
│ go.mod
│ go.sum
│ README.md
