https://github.com/roblaszczak/reservation-system

Using https://watermill.io/ Go library building event-driven application.
https://github.com/roblaszczak/reservation-system

Last synced: 27 days ago
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Using https://watermill.io/ Go library building event-driven application.

• Host: GitHub
• URL: https://github.com/roblaszczak/reservation-system
• Owner: roblaszczak
• Created: 2019-03-17T18:26:36.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-04-13T13:57:44.000Z (over 5 years ago)
• Last Synced: 2024-10-04T19:44:29.281Z (about 2 months ago)
• Language: Go
• Homepage:
• Size: 39.1 KB
• Stars: 6
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Room Reservation System

Example application created for the presentation on [GopherCon Russia 2019 (slides)](https://speakerdeck.com/roblaszczak/event-driven-application-made-easy-with-watermill).

There are 3 versions of this application:

- [`1.0`](1.0/cmd/) - just HTTP handler

- [`2.0`](2.0/cmd/) - using [Watermill](https://watermill.io/) to handle payment initialization in the background

- [`3.0`](3.0/) - using [Watermill CQRS component](https://watermill.io/docs/cqrs/) for initializing payments and counting bookings

Database adapters (in memory in this case) and domain layer is shared by all application versions.

Warning: this repository is using some Watermill unreleased features, which are still not released, like `NewPoisonQueueWithFilter` or `CorrelationIDWithAutogenerate`. They are now on `cqrs-fix` branch and will be released in `v0.4.0`.

## Up and running

For v2.0 and v3.0 you need Kafka. You can use docker-compose to run it:

    docker-compose up

If you need some help with docker-compose setup, you should check our article about local [Golang development environment](https://threedots.tech/post/go-docker-dev-environment-with-go-modules-and-live-code-reloading/).

And then you should run `cmd/main.go` from application version which you want to run.

    cd 3.0/cmd/

    go run .

### Booking a room

You can book a room using REST API using [https://httpie.org/](HTTPie).

    http POST localhost:6060/book-room RoomID=10 StartTime=2018-09-22T12:42:31Z EndTime=2018-09-22T12:42:31Z GuestsCount:=2 PaymentChannel="paypal" -v

### TODO

- [ ] Update Watermill to the last release (some changes to CQRS need to be merged to the Watermill's `master` from `cqrs-fix` branch)

- [ ] Some code cleanups and TODO's fixes

- [ ] Slides link

- [ ] Detailed description

## Support

Please join us on the `#watermill` channel on the [Gophers slack](https://gophers.slack.com/): You can get invite [here](https://gophersinvite.herokuapp.com/).