Created
May 20, 2012 13:27
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# app/models/queue/base.rb | |
class Queue::Base | |
class << self | |
def enqueue(object, method, *args) | |
meta = { 'method' => method } | |
ensure_queueable!(object, method, *args) | |
if is_model?(object) | |
Resque.enqueue(self, meta.merge('class' => object.class.name, 'id' => object.id), *args) | |
else | |
Resque.enqueue(self, meta.merge('class' => object.name), *args) | |
end | |
end | |
def perform(meta = { }, *args) | |
if meta.has_key?('id') | |
if model = meta['class'].constantize.find_by_id(meta['id']) | |
model.send(meta['method'], *args) | |
end | |
else | |
meta['class'].constantize.send(meta['method'], *args) | |
end | |
end | |
def is_model?(object) | |
object.class.respond_to?(:find_by_id) | |
end | |
private | |
def ensure_queueable!(object, method, *args) | |
ensure_responds_to!(object, method) | |
ensure_arity!(object, method, args.length) | |
end | |
def ensure_responds_to!(object, method) | |
unless object.respond_to?(method) | |
raise "object must respond to #{method}" | |
end | |
end | |
def ensure_arity!(object, method, arity) | |
required = object.method(method).arity | |
if required < 0 && arity < -required | |
raise "#{method}: #{arity} of #{-required} arguments given" | |
elsif required >= 0 && required != arity | |
raise "#{method}: #{arity} of #{required} arguments given" | |
end | |
end | |
end | |
end |
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