Class: Async::Container::Generic

Inherits:
Object
  • Object
show all
Defined in:
lib/async/container/generic.rb

Direct Known Subclasses

Forked, Threaded

Constant Summary collapse

UNNAMED = 
"Unnamed"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(**options) ⇒ Generic

Returns a new instance of Generic.



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# File 'lib/async/container/generic.rb', line 47

def initialize(**options)
	@group = Group.new
	@running = true
	
	@state = {}
	
	@statistics = Statistics.new
	@keyed = {}
end

Instance Attribute Details

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/async/container/generic.rb', line 57

def state
  @state
end

#statistics ⇒ Object (readonly)

Returns the value of attribute statistics.



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# File 'lib/async/container/generic.rb', line 67

def statistics
  @statistics
end

Class Method Details

.run(*arguments, **options, &block) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 41

def self.run(*arguments, **options, &block)
	self.new.run(*arguments, **options, &block)
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 63

def [] key
	@keyed[key]&.value
end

#async(**options, &block) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 166

def async(**options, &block)
	spawn(**options) do |instance|
		Async::Reactor.run(instance, &block)
	end
end

#failed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/container/generic.rb', line 69

def failed?
	@statistics.failed?
end

#key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/container/generic.rb', line 206

def key?(key)
	if key
		@keyed.key?(key)
	end
end

#mark?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/container/generic.rb', line 194

def mark?(key)
	if key
		if value = @keyed[key]
			value.mark!
			
			return true
		end
	end
	
	return false
end

#reload ⇒ Object 



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# File 'lib/async/container/generic.rb', line 180

def reload
	@keyed.each_value(&:clear!)
	
	yield
	
	dirty = false
	
	@keyed.delete_if do |key, value|
		value.stop? && (dirty = true)
	end
	
	return dirty
end

#run(count: Container.processor_count, **options, &block) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 172

def run(count: Container.processor_count, **options, &block)
	count.times do
		spawn(**options, &block)
	end
	
	return self
end

#running? ⇒ Boolean

Whether there are running tasks.

Returns:

  • (Boolean) 


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# File 'lib/async/container/generic.rb', line 74

def running?
	@group.running?
end

#sleep(duration = nil) ⇒ Object

Sleep until some state change occurs.

Parameters:

  • duration (Integer) (defaults to: nil) —

    the maximum amount of time to sleep for.



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# File 'lib/async/container/generic.rb', line 80

def sleep(duration = nil)
	@group.sleep(duration)
end

#spawn(name: nil, restart: false, key: nil, &block) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 122

def spawn(name: nil, restart: false, key: nil, &block)
	name ||= UNNAMED
	
	if mark?(key)
		Async.logger.debug(self) {"Reusing existing child for #{key}: #{name}"}
		return false
	end
	
	@statistics.spawn!
	
	Fiber.new do
		while @running
			child = self.start(name, &block)
			
			state = insert(key, child)
			
			begin
				status = @group.wait_for(child) do |message|
					state.update(message)
				end
			ensure
				delete(key, child)
			end
			
			if status.success?
				Async.logger.info(self) {"#{child} exited with #{status}"}
			else
				@statistics.failure!
				Async.logger.error(self) {status}
			end
			
			if restart
				@statistics.restart!
			else
				break
			end
		end
	# ensure
	# 	Async.logger.error(self) {$!} if $!
	end.resume
	
	return true
end

#status?(flag) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/container/generic.rb', line 89

def status?(flag)
	# This also returns true if all processes have exited/failed:
	@state.all?{|_, state| state[flag]}
end

#stop(timeout = true) ⇒ Object 



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# File 'lib/async/container/generic.rb', line 111

def stop(timeout = true)
	@running = false
	@group.stop(timeout)
	
	if @group.running?
		Async.logger.warn(self) {"Group is still running after stopping it!"}
	end
ensure
	@running = true
end

#to_s ⇒ Object 



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# File 'lib/async/container/generic.rb', line 59

def to_s
	"#{self.class} with #{@statistics.spawns} spawns and #{@statistics.failures} failures."
end

#wait ⇒ Object

Wait until all spawned tasks are completed.



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# File 'lib/async/container/generic.rb', line 85

def wait
	@group.wait
end

#wait_until_ready ⇒ Object 



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# File 'lib/async/container/generic.rb', line 94

def wait_until_ready
	while true
		Async.logger.debug(self) do |buffer|
			buffer.puts "Waiting for ready:"
			@state.each do |child, state|
				buffer.puts "\t#{child.class}: #{state.inspect}"
			end
		end
		
		self.sleep
		
		if self.status?(:ready)
			return true
		end
	end
end