Class: AnyCable::MiddlewareChain

Inherits:
Object
  • Object
show all
Defined in:
lib/anycable/middleware_chain.rb

Overview

Middleware chain is used to build the list of gRPC server interceptors.

Each interceptor should be a subsclass of AnyCable::Middleware and implement ‘#call` method.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MiddlewareChain

Returns a new instance of MiddlewareChain.



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# File 'lib/anycable/middleware_chain.rb', line 13

def initialize
  @registry = []
  @mu = Monitor.new
end

Instance Method Details

#call(method_name, request, meta = {}, &block) ⇒ Object 



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# File 'lib/anycable/middleware_chain.rb', line 33

def call(method_name, request, meta = {}, &block)
  return yield(method_name, request, meta) if registry.none?

  execute_next_middleware(0, method_name, request, meta, block)
end

#freeze ⇒ Object 



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# File 'lib/anycable/middleware_chain.rb', line 24

def freeze
  registry.freeze
  super
end

#to_a ⇒ Object 



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# File 'lib/anycable/middleware_chain.rb', line 29

def to_a
  registry
end

#use(middleware) ⇒ Object 



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# File 'lib/anycable/middleware_chain.rb', line 18

def use(middleware)
  check_frozen!
  middleware = build_middleware(middleware)
  sync { registry << middleware }
end