Class: Dry::Effects::Providers::Lock

Inherits:
Object
  • Object
show all
Defined in:
lib/dry/effects/providers/lock.rb

Defined Under Namespace

Classes: Backend, Handle

Constant Summary collapse

Locate = 
Effect.new(type: :lock, name: :locate)

Instance Method Summary collapse

Instance Method Details

#call(backend = Undefined) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Yield the block with the handler installed

API:

  • private



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# File 'lib/dry/effects/providers/lock.rb', line 78

def call(backend = Undefined)
  backend_replace = Undefined.default(backend) do
    parent = ::Dry::Effects.yield(Locate) { Undefined }
    Undefined.map(parent, &:backend)
  end

  with_backend(backend_replace) do
    yield
  ensure
    owned.each { unlock(_1) }
  end
end

#locate ⇒ Provider

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Locate handler in the stack

Returns:

API:

  • private



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# File 'lib/dry/effects/providers/lock.rb', line 73

def locate = self

#lock(key, meta = Undefined) ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 57

def lock(key, meta = Undefined)
  locked = backend.lock(key, meta)
  owned << locked if locked
  locked
end

#locked?(key) ⇒ Boolean

Returns:



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# File 'lib/dry/effects/providers/lock.rb', line 63

def locked?(key) = backend.locked?(key)

#meta(key) ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 67

def meta(key) = backend.meta(key)

#owned ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 104

def owned
  @owned ||= []
end

#represent ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 108

def represent
  if owned.empty?
    super
  else
    "lock[owned=#{owned.size}]"
  end
end

#unlock(handle) ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 65

def unlock(handle) = backend.unlock(handle)

#with_backend(backend) ⇒ Object 



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# File 'lib/dry/effects/providers/lock.rb', line 91

def with_backend(backend)
  if Undefined.equal?(backend)
    yield
  else
    begin
      before, @backend = @backend, backend
      yield
    ensure
      @backend = before
    end
  end
end