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Added configurable source of randomness #638

Merged
merged 76 commits into from
Jul 27, 2023
Merged

Added configurable source of randomness #638

merged 76 commits into from
Jul 27, 2023

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cicirello
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@cicirello cicirello commented Jun 13, 2023 •
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Summary

Added configurable source of randomness. This includes the following (from the related issue):

  • All operators, etc that require randomness should maintain their own random number generator instance
  • Factory that creates instances of currently configured random number generator
  • Enable configuring the factory with a source of randomness by specifying an instance of a RandomGenerator.SplittableGenerator (split is needed for library's multithreaded functionality
  • Enable configuring by seed
  • Provide ThreadLocal instances for cases where less convenient to manage a PRNG within a component
  • Provide a default source of randomness (fast algorithm... perhaps SplittableRandom... currently ThreadLocalRandom)
  • Replace all calls to methods of ThreadLocalRandom with calls to equivalent methods on operators' own PRNG
  • Replace all calls to static methods of dependency rho-mu's RandomIndexer, RandomSampler, RandomVariates classes to methods equivalent methods on operators' own PRNG
  • Carefully examine all method calls that pass a RandomGenerator
  • All files in list later in PR have been verified, i.e., that check list is entirely checked

Closing Issues

Closes #636

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Improvements to existing code, such as refactoring or optimizations (non-breaking)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • I have read the CONTRIBUTING document.
  • My code follows the code style of this project.
  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I have added tests to cover my changes.
  • All new and existing tests passed.

Checklist of files

This is a list of files in the library that might need changes in order for this PR to be ready to merge. It is a list of all Java files in the library that use randomness in some way, generated by a simple text search of import statements and classes used.

  • Configurator.java
  • evo\AbstractRouletteWheelSelection.java
  • evo\AdaptiveGeneration.java
  • evo\AdaptiveMutationOnlyGeneration.java
  • evo\AlwaysMutateGeneration.java
  • evo\EncodingWithParameters.java
  • evo\MutuallyExclusiveGeneration.java
  • evo\NaiveAlwaysMutateGeneration.java
  • evo\NaiveSimpleGeneration.java
  • evo\OnlyMutateGeneration.java
  • evo\RandomSelection.java
  • evo\SimpleGeneration.java
  • evo\StochasticUniversalSampling.java
  • evo\TournamentSelection.java
  • evo\TruncationSelection.java
  • internal\RandomnessFactory.java
  • operators\HybridCrossover.java
  • operators\HybridMutation.java
  • operators\HybridUndoableMutation.java
  • operators\WeightedHybridCrossover.java
  • operators\WeightedHybridMutation.java
  • operators\WeightedHybridUndoableMutation.java
  • operators\bits\BitFlipMutation.java
  • operators\bits\BitVectorInitializer.java
  • operators\bits\DefiniteBitFlipMutation.java
  • operators\bits\KPointCrossover.java
  • operators\bits\SinglePointCrossover.java
  • operators\bits\TwoPointCrossover.java
  • operators\bits\UniformCrossover.java
  • operators\integers\IntegerValueInitializer.java
  • operators\integers\IntegerVectorInitializer.java
  • operators\integers\KPointCrossover.java
  • operators\integers\RandomValueChangeMutation.java
  • operators\integers\SinglePointCrossover.java
  • operators\integers\TwoPointCrossover.java
  • operators\integers\UndoableUniformMutation.java
  • operators\integers\UniformCrossover.java
  • operators\integers\UniformMutation.java
  • operators\permutations\AdjacentSwapMutation.java
  • operators\permutations\BlockInterchangeMutation.java
  • operators\permutations\BlockMoveMutation.java
  • operators\permutations\CycleAlphaMutation.java
  • operators\permutations\CycleCrossover.java
  • operators\permutations\CycleMutation.java
  • operators\permutations\EdgeRecombination.java
  • operators\permutations\EnhancedEdgeRecombination.java
  • operators\permutations\InsertionMutation.java
  • operators\permutations\NonWrappingOrderCrossover.java
  • operators\permutations\OrderCrossover.java
  • operators\permutations\OrderCrossoverTwo.java
  • operators\permutations\PartiallyMatchedCrossover.java
  • operators\permutations\PermutationInitializer.java
  • operators\permutations\PrecedencePreservativeCrossover.java
  • operators\permutations\ReversalMutation.java
  • operators\permutations\RotationMutation.java
  • operators\permutations\ScrambleMutation.java
  • operators\permutations\SwapMutation.java
  • operators\permutations\ThreeOptMutation.java
  • operators\permutations\TwoChangeMutation.java
  • operators\permutations\UndoableScrambleMutation.java
  • operators\permutations\UndoableUniformScrambleMutation.java
  • operators\permutations\UniformOrderBasedCrossover.java
  • operators\permutations\UniformPartiallyMatchedCrossover.java
  • operators\permutations\UniformPrecedencePreservativeCrossover.java
  • operators\permutations\UniformScrambleMutation.java
  • operators\permutations\WindowLimitedBlockMoveMutation.java
  • operators\permutations\WindowLimitedInsertionMutation.java
  • operators\permutations\WindowLimitedReversalMutation.java
  • operators\permutations\WindowLimitedScrambleMutation.java
  • operators\permutations\WindowLimitedSwapMutation.java
  • operators\permutations\WindowLimitedUndoableScrambleMutation.java
  • operators\reals\CauchyMutation.java
  • operators\reals\GaussianMutation.java
  • operators\reals\KPointCrossover.java
  • operators\reals\RealValueInitializer.java
  • operators\reals\RealVectorInitializer.java
  • operators\reals\SinglePointCrossover.java
  • operators\reals\TwoPointCrossover.java
  • operators\reals\UndoableCauchyMutation.java
  • operators\reals\UndoableGaussianMutation.java
  • operators\reals\UndoableUniformMutation.java
  • operators\reals\UniformCrossover.java
  • operators\reals\UniformMutation.java
  • problems\LargestCommonSubgraph.java
  • problems\QuadraticAssignmentProblem.java
  • problems\binpack\BinPacking.java
  • problems\scheduling\CommonDuedateScheduling.java
  • problems\scheduling\WeightedStaticScheduling.java
  • problems\scheduling\WeightedStaticSchedulingWithSetups.java
  • problems\tsp\RandomTSPMatrix.java
  • problems\tsp\TSP.java
  • representations\BitVector.java
  • sa\ExponentialCooling.java
  • sa\LinearCooling.java
  • sa\LogarithmicCooling.java
  • sa\ModifiedLam.java
  • sa\ModifiedLamOriginal.java
  • sa\ParameterFreeExponentialCooling.java
  • sa\ParameterFreeLinearCooling.java
  • sa\SelfTuningLam.java
  • ss\AcceptanceBandSampling.java
  • ss\HeuristicBiasedStochasticSampling.java
  • ss\HybridConstructiveHeuristic.java
  • ss\ValueBiasedStochasticSampling.java

@cicirello cicirello added the enhancement New feature or request label Jun 13, 2023
@cicirello cicirello added this to the chips-n-salsa 6.4.0 milestone Jun 13, 2023
@cicirello cicirello self-assigned this Jun 13, 2023
@cicirello cicirello marked this pull request as draft June 13, 2023 21:39
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@cicirello cicirello marked this pull request as ready for review July 27, 2023 18:37
@cicirello cicirello merged commit 4422e4f into master Jul 27, 2023
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@cicirello cicirello deleted the feat-customize-randomness branch July 27, 2023 18:38
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Labels
enhancement New feature or request
Projects
Computational Intelligence Research
Status: Done
Milestone
chips-n-salsa 6.4.0
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Customizable source of randomness
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