evented alternatives and similar shards
Based on the "Misc" category.
Alternatively, view evented alternatives based on common mentions on social networks and blogs.
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sentry
Build/Runs your crystal application, watches files, and rebuilds/restarts app on file changes -
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burocracia.cr
👔 Zero-dependency Crystal shard to validate, generate and format Brazilian burocracias (CPF, CNPJ, CEP) -
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wikicr
Wiki in crystal, using Markdown and Git, inspired by dokuwiki. Last features to build are pretty hard, if you have some time to help... :) -
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defined
This shard provides facilities for checking whether a constant exists at compile time, and for a variety of different conditional compilation options. Code can be conditionally compiled based on the existence of a constant, version number constraints, or whether an environment variable is set truthy or not. -
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InfluxDB – Built for High-Performance Time Series Workloads
Do you think we are missing an alternative of evented or a related project?
README
Evented
A micro library providing Crystal objects with Publish-Subscribe capabilities
- Decouple core business logic from external concerns in Hexagonal style architectures
- Use as an alternative to callbacks and Observers
- Connect objects based on context without permanence
- React to events synchronously
Installation
Add this to your application's shard.yml:
dependencies:
evented:
github: krisleech/evented
Usage
Publishing
By including Evented::Publisher your objects get broadcast and
subscribe methods.
broadcast can be called from within your object whenever you want to
broadcast a significant event.
require "evented"
class MyPublisher
include Evented::Publisher
def call(input)
result = do_something(input)
broadcast(:something_happened, result)
end
end
Subscribing
To subscribe an object to receive events include Evented::Subscriber and
provide your own on_event method which will receive 2 arguments, the
event_name and payload.
require "evented"
class MySubscriber
include Evented::Subscriber
def on_event(event_name, payload)
# ...
end
end
To subscribe the listener to a publisher:
publisher = MyPublisher.new
publisher.subscribe(MySubscriber.new)
publisher.call("hello")
In the above example the subscriber will have on_event(:something_happened, "hello")
called.
Development
Specs
crystal spec
Automatically run Specs
ls ./**/*.cr | entr crystal spec
Contributing
- Fork it ( https://github.com/krisleech/evented/fork )
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Add some feature')
- Push to the branch (git push origin my-new-feature)
- Create a new Pull Request
Contributors
- Kris Leech - creator, maintainer