Class: Breeder::BreedingStrategy::Forks
- Inherits:
-
Object
- Object
- Breeder::BreedingStrategy::Forks
- Defined in:
- lib/breeder/breeding_strategy/forks.rb
Instance Method Summary collapse
- #create_worker ⇒ Object
-
#initialize(worker_factory, initial_workers) ⇒ Forks
constructor
A new instance of Forks.
- #num_workers ⇒ Object
- #reap! ⇒ Object
- #spawn! ⇒ Object
- #start! ⇒ Object
- #stop! ⇒ Object
Constructor Details
#initialize(worker_factory, initial_workers) ⇒ Forks
Returns a new instance of Forks.
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# File 'lib/breeder/breeding_strategy/forks.rb', line 5 def initialize(worker_factory, initial_workers) @children = [] @worker_factory = worker_factory @initial_workers = initial_workers end |
Instance Method Details
#create_worker ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 23 def create_worker raise "No worker factory specified" unless !!@worker_factory worker = @worker_factory.call unless [:run, :stop!, :stop?].all? { |method| worker.respond_to?(method) } raise "object from worker factory doesn't quack like a worker" end worker end |
#num_workers ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 11 def num_workers @children.size end |
#reap! ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 51 def reap! if @children.size > 1 pid = @children.pop Process.kill('HUP', pid) sleep 1 Process.kill(9, pid) end end |
#spawn! ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 32 def spawn! t = Thread.new do if pid = Process.fork #parent @children << pid else worker = create_worker #child trap('HUP') do worker.stop! end trap('INT', 'DEFAULT') worker.run Process.exit end end t.join end |
#start! ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 15 def start! @initial_workers.times { spawn! } end |
#stop! ⇒ Object
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# File 'lib/breeder/breeding_strategy/forks.rb', line 19 def stop! @children.size.times { reap! } end |