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Contents
require "coach/errors"
require "coach/middleware_validator"
module Coach
class MiddlewareItem
attr_accessor :middleware, :parent
def initialize(middleware, config = {})
@middleware = middleware
@config_value = config
end
def build_middleware(context, successor)
@middleware.
new(context,
successor && successor.instrument,
config)
end
# Runs validation against the middleware chain, raising if any unmet dependencies are
# discovered.
def validate!
MiddlewareValidator.new(middleware).validated_provides!
end
# Assigns the parent for this middleware, allowing config inheritance
def set_parent(parent)
@parent = parent
self
end
# Generates config by either cloning our given config (if it's a hash) else if a
# lambda value, then will compute the config by calling the lambda with this
# middlewares parent config.
def config
@config ||= lambda_config? ? @config_value.call(parent.config) : @config_value.clone
end
private
def lambda_config?
@config_value.respond_to?(:call)
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems