Class SolverMultiClosedAMVA

java.lang.Object

solvers.SolverMulti

solvers.SolverMultiIterative

solvers.SolverMultiClosedAMVA

Direct Known Subclasses:

SolverMultiClosedAQL, SolverMultiClosedBardSchweitzer, SolverMultiClosedChow, SolverMultiClosedLinearizer

public abstract class SolverMultiClosedAMVA
extends SolverMultiIterative

This class implements the abstract superclass of approximate MVA algorithms for solving multi-closed models

Author:

Abhimanyu Chugh

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	clsPopulation

Fields inherited from class SolverMultiIterative

DEFAULT_TOLERANCE, iterations, MAX_ITERATIONS, tolerance

Fields inherited from class SolverMulti

classes, CLOSED_CLASS, clsNumJobs, clsRespTime, clsThroughput, DELAY, HOL, LD, LI, name, OPEN_CLASS, priorities, PRS, pw, queueLen, residenceTime, scQueueLen, scResidTime, scThroughput, scUtilization, servers, servTime, stations, sysNumJobs, sysResponseTime, sysThroughput, throughput, type, utilization, visits

Constructor Summary

Constructors

Constructor	Description
SolverMultiClosedAMVA(int classes, int stations, int[] classPopulation)

Method Summary

Modifier and Type	Method	Description
protected abstract double[][]	getQueueLensWithOneLessCustomer()
double	getTotNumJobs()	Returns the number of jobs in the system
boolean	hasSufficientProcessingCapacity()	A system is said to have sufficient capacity to process a given load lambda if no service center is saturated as a result of the combined loads of all the classes.
protected double	maxDiff(double[][] oldQueueLens, double[][] currentQueueLens)	returns the max difference between the old queue lengths and the current queue lengths of each station and class
protected double	maxDiff(double[] scOldQueueLens, double[] scCurrentQueueLens)	returns the max difference between the old queue lengths and the current queue lengths of each station
void	solve()	Must be implemented to create a multi class model solver.
void	solveLI()
static Double	validateTolerance(String tolerance)	check whether the given tolerance is valid or not

Methods inherited from class SolverMultiIterative

getIterations, setMaxIterations, setTolerance

Methods inherited from class SolverMulti

getAggrQueueLen, getAggrQueueLen, getAggrResTime, getAggrResTime, getAggrThroughput, getAggrThroughput, getAggrUtilization, getAggrUtilization, getClsResTime, getClsResTime, getClsThroughput, getClsThroughput, getQueueLen, getQueueLen, getResTime, getResTime, getThroughput, getThroughput, getTotResTime, getTotThroughput, getUtilization, getUtilization, getVisits, input, input, printIndices, setServTime, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

clsPopulation

protected int[] clsPopulation

Constructor Details

SolverMultiClosedAMVA

public SolverMultiClosedAMVA(int classes,
 int stations,
 int[] classPopulation)

Method Details

validateTolerance

public static Double validateTolerance(String tolerance)

check whether the given tolerance is valid or not

Parameters:

tolerance -

Returns:

a Double if valid, otherwise null

getTotNumJobs

public double getTotNumJobs()

Returns the number of jobs in the system

Returns:

the total number of jobs

solve

public void solve()

Description copied from class: SolverMulti

Must be implemented to create a multi class model solver.

Specified by:

solve in class SolverMulti

solveLI

public void solveLI()

getQueueLensWithOneLessCustomer

protected abstract double[][] getQueueLensWithOneLessCustomer()

maxDiff

protected double maxDiff(double[] scOldQueueLens,
 double[] scCurrentQueueLens)

returns the max difference between the old queue lengths and the current queue lengths of each station

Parameters:

scOldQueueLens - the old queue lengths to compare with current queue lengths (scCurrentQueueLens)

scCurrentQueueLens - the current queue lengths used for comparison

Returns:

the max difference

maxDiff

protected double maxDiff(double[][] oldQueueLens,
 double[][] currentQueueLens)

returns the max difference between the old queue lengths and the current queue lengths of each station and class

Parameters:

oldQueueLens - the old queue lengths to compare with current queue lengths (scCurrentQueueLens)

currentQueueLens - the current queue lengths used for comparison

Returns:

the max difference

hasSufficientProcessingCapacity

public boolean hasSufficientProcessingCapacity()

Description copied from class: SolverMulti

A system is said to have sufficient capacity to process a given load lambda if no service center is saturated as a result of the combined loads of all the classes.
Must be implemented to create a multi class model solver.
WARNING: This method should be called before solving the system.

Specified by:

hasSufficientProcessingCapacity in class SolverMulti

Returns:

true if sufficient capacity exists for the given workload, false otherwise