Class: MrDarcy::Promise::Collection

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Enumerable
Defined in:
lib/mr_darcy/promise/collection.rb

Overview

A meta-promise that represents a collection of other promises and their states.

Instance Method Summary collapse

Constructor Details

#initialize(promises, opts = {}) ⇒ Collection

Creates a meta-promise based on a collection of promises.

  • promises: an array of promises

  • opts: options for MrDarcy.promise


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# File 'lib/mr_darcy/promise/collection.rb', line 18

def initialize promises, opts={}
  @lock     = Mutex.new
  @promises = []
  @size     = promises.size
  @promise  = MrDarcy.promise opts do
    promises.each do |p|
      add_promise p
    end
  end
end

Instance Method Details

#each(&block) ⇒ Object

Allow iteration of promises for Enumerable.


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# File 'lib/mr_darcy/promise/collection.rb', line 36

def each &block
  promises.each &block
end

#final ⇒ Object

See MrDarcy::Promise::Base#final


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# File 'lib/mr_darcy/promise/collection.rb', line 30

def final
  my_promise.final
  self
end

#promises ⇒ Object

Return an array of promises in this collection.


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# File 'lib/mr_darcy/promise/collection.rb', line 53

def promises
  @lock.synchronize { @promises }
end

#push(promise) ⇒ Object Also known as: <<

Add a new promise to our collection.


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# File 'lib/mr_darcy/promise/collection.rb', line 41

def push promise
  @lock.synchronize { @size = @size + 1 }
  add_promise promise
end

#size ⇒ Object

Return the number of promises in this collection.


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# File 'lib/mr_darcy/promise/collection.rb', line 48

def size
  @lock.synchronize { @size }
end