Class: Eventsims::Randomsim

Inherits:
Object
  • Object
show all
Defined in:
lib/eventsims/simevent.rb

Overview

module Simevent

Direct Known Subclasses

Simulate

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Randomsim

Returns a new instance of Randomsim.



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# File 'lib/eventsims/simevent.rb', line 6

def initialize(*args)
	''' Initialisation '''

	stop, amount, @_intarrival,  @_service = 10, (2..20).step(1).to_a.sample, [], []

	if args.size == 0
		amount.times{@_intarrival << (1..stop).step(1).to_a.sample}
		amount.times{@_service << (1..stop).step(1).to_a.sample}	

	elsif args.size == 1
		args[0].times{@_intarrival << (1..stop).step(1).to_a.sample}
		args[0].times{@_service << (1..stop).step(1).to_a.sample}	

	elsif args.size == 2
		args[1].times{@_intarrival << (1..args[0]).step(1).to_a.sample}
		args[1].times{@_service << (1..args[0]).step(1).to_a.sample}	

	elsif args.size == 3
		args[2].times{@_intarrival << (1..args[0]).step(1).to_a.sample}
		args[2].times{@_service << (1..args[1]).step(1).to_a.sample}

	else
		raise "Arguments must be between 0 to 3"
	end

	#Sets its first value to zero
	@_intarrival[0] = 0

	# Required variables
	@_arrival, @_preservstart, @_servstart = [], [0], []
	@_queue, @_servend, @_custspend, @_idle = [], [], [], [0]

	def getarrive_()
		'''Returns arrival time'''
		increase = 0
		@_intarrival.each {|i| increase +=i
			@_arrival << increase }
		return @_arrival
	end
	
	def servbegins_()
		'''Returns time when service begin'''
		increase = 0
		i = 0; while i < @_service.size
			increase+= @_service[i]
			@_preservstart << increase
			i+=1
		end
		@_preservstart.pop
		return @_preservstart
	end

	#populate @_servend with values. just to get same size
	@_intarrival.each{|i| @_servend << i}
		
	#Please maintain order if you are editing the code!
	# Calling functions
	getarrive_()	#Returns arrival time
	servbegins_()	#Returns time when servce begin

	def get_servend_()
		'''Retuns time when service ends'''
		x = 0; while x < ((@_preservstart).size)
			@_servend[x] = @_preservstart[x] + @_service[x]
			s = 1; while s < (@_preservstart).size
				if @_preservstart[s] < (maximum = @_arrival[s] > @_servend[x]? @_arrival[s] : @_servend[x])
					@_preservstart[s] = (maximum)
				end
				s+=1 
			end
			x+=1
		end

		return @_servend
	end

	# Method used to calculate the rest of the data like
	#time when service begins
	#wait time in queue, (_queue)
	#time customer spent in the system (_custspend)
	def otherresults(list1, list2, list3)
		''' Stores and return the value of (list2 - list3) in list1 '''
		x = 0; while x < list2.size
			list1 << (list2[x] - list3[x]) 
			x+=1
		end
		list1[0] = 0 if list1[0] < 0	
	end

	def idletime_()
		'''Returns the idle time of server'''
		x,y = 0,1
		while y < @_servend.size
			(@_idle) << (@_servstart[y] - @_servend[x])
			x+=1; y+=1
		end
		return @_idle
	end

	# Calling other methods
	get_servend_()
	otherresults(@_servstart, @_servend, @_service) 
	otherresults(@_queue, @_servstart, @_arrival) 
	otherresults(@_custspend, @_servend, @_arrival)
	idletime_()
end

Instance Method Details

#arrival ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 121

def arrival()
	'''Returns the arrival time'''
	return @_arrival
end

#custspend ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 146

def custspend()
	'''Returns the time customer spends in system'''
	return @_custspend
end

#get_servend_ ⇒ Object

Returns time when servce begin



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# File 'lib/eventsims/simevent.rb', line 66

def get_servend_()
	'''Retuns time when service ends'''
	x = 0; while x < ((@_preservstart).size)
		@_servend[x] = @_preservstart[x] + @_service[x]
		s = 1; while s < (@_preservstart).size
			if @_preservstart[s] < (maximum = @_arrival[s] > @_servend[x]? @_arrival[s] : @_servend[x])
				@_preservstart[s] = (maximum)
			end
			s+=1 
		end
		x+=1
	end

	return @_servend
end

#getarrive_ ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 38

def getarrive_()
	'''Returns arrival time'''
	increase = 0
	@_intarrival.each {|i| increase +=i
		@_arrival << increase }
	return @_arrival
end

#idle ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 151

def idle()
	'''Returns the idle time of server'''
	return @_idle
end

#idletime_ ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 95

def idletime_()
	'''Returns the idle time of server'''
	x,y = 0,1
	while y < @_servend.size
		(@_idle) << (@_servstart[y] - @_servend[x])
		x+=1; y+=1
	end
	return @_idle
end

#intarrival ⇒ Object

Methods to be used outside of initialize returning necessary values Main methods



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# File 'lib/eventsims/simevent.rb', line 116

def intarrival()
	'''Returns the interarrival time'''
	return @_intarrival
end

#otherresults(list1, list2, list3) ⇒ Object

Method used to calculate the rest of the data like time when service begins wait time in queue, (_queue) time customer spent in the system (_custspend)



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# File 'lib/eventsims/simevent.rb', line 86

def otherresults(list1, list2, list3)
	''' Stores and return the value of (list2 - list3) in list1 '''
	x = 0; while x < list2.size
		list1 << (list2[x] - list3[x]) 
		x+=1
	end
	list1[0] = 0 if list1[0] < 0	
end

#queuewait ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 136

def queuewait()
	"""Returns the customer's waiting time in the queue"""
	return @_queue
end

#servbegin ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 131

def servbegin()
	'''Returns the time when service began'''
	return @_servstart
end

#servbegins_ ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 46

def servbegins_()
	'''Returns time when service begin'''
	increase = 0
	i = 0; while i < @_service.size
		increase+= @_service[i]
		@_preservstart << increase
		i+=1
	end
	@_preservstart.pop
	return @_preservstart
end

#servend ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 141

def servend()
'''Returns the time service ended'''
return @_servend
end

#service ⇒ Object 



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# File 'lib/eventsims/simevent.rb', line 126

def service()
	'''Returns the service time'''
	return @_service
end