78 lines
1.8 KiB
Ruby
78 lines
1.8 KiB
Ruby
# frozen_string_literal: true
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# rubocop:disable Style/ClassVars
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# This is inspired by http://www.salsify.com/blog/engineering/tearing-capybara-ajax-tests
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# Rack middleware that keeps track of the number of active requests and can block new requests.
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module Gitlab
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module Testing
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class RequestBlockerMiddleware
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@@num_active_requests = Concurrent::AtomicFixnum.new(0)
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@@block_requests = Concurrent::AtomicBoolean.new(false)
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@@slow_requests = Concurrent::AtomicBoolean.new(false)
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# Returns the number of requests the server is currently processing.
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def self.num_active_requests
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@@num_active_requests.value
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end
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# Prevents the server from accepting new requests. Any new requests will return an HTTP
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# 503 status.
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def self.block_requests!
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@@block_requests.value = true
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end
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# Slows down incoming requests (useful for race conditions).
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def self.slow_requests!
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@@slow_requests.value = true
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end
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# Allows the server to accept requests again.
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def self.allow_requests!
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@@block_requests.value = false
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@@slow_requests.value = false
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end
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def initialize(app)
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@app = app
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end
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def call(env)
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increment_active_requests
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if block_requests?
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block_request(env)
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else
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sleep 0.2 if slow_requests?
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@app.call(env)
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end
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ensure
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decrement_active_requests
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end
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private
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def block_requests?
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@@block_requests.true?
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end
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def slow_requests?
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@@slow_requests.true?
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end
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def block_request(env)
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[503, {}, []]
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end
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def increment_active_requests
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@@num_active_requests.increment
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end
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def decrement_active_requests
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@@num_active_requests.decrement
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end
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end
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end
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end
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