This project is still in active development
This library is meant to provide a simple way to enable the circuit breaker pattern to em-http requests by providing some middleware that can prevent requests and manage circuit state based on response parameters.
Add this line to your application's Gemfile:
gem 'eventmachine-circuit_breaker'
And then execute:
$ bundle
require 'eventmachine/circuit_breaker'
require 'em-http-request'
# circuit breaker for all requests
EventMachine.run do
EventMachine::HttpRequest.use EventMachine::CircuitBreaker
# now you can use em-http-request as normal
end
# circuit breaker per connection
EventMachine.run do
connection = EventMachine::HttpRequest.new("http://example.com")
connection.use EventMachine::CircuitBreaker
connection.get
# ...
end
# sharing circuit state
EventMachine.run do
circuit_strategy = EventMachine::CircuitBreaker::Strategy::Basic.new
connection_1 = EventMachine::HttpRequest.new("http://example.com/foo")
connection_1.use EventMachine::CircuitBreaker, strategy: circuit_strategy
connection_1.get
# ...
connection_2 = EventMachine::HttpRequest.new("http://example.com/bar")
connection_2.use EventMachine::CircuitBreaker, strategy: circuit_strategy
connection_2.get
# ...
end
After checking out the repo, run bin/setup
to install dependencies. Then, run rake test
to run the tests. You can also run bin/console
for an interactive prompt that will allow you to experiment.
Bug reports and pull requests are welcome on GitHub at https://github.com/dcoxall/eventmachine-circuit_breaker.