ILOG CPLEX C++ API 9.0 Reference Manual

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IloCplex::CallbackI IloCplex::CallbackI Category Inner Class InheritancePath Definition File Include Files ilocplexi.h ilcplex/ilocplex.h protected void protected virtual CallbackI * protected IloEnv protected IloModel protected IloInt protected IloInt protected IloInt protected virtual void Method Summary CallbackI::abort() CallbackI::duplicateCallback() CallbackI::getEnv() CallbackI::getModel() CallbackI::getNcols() CallbackI::getNQCs() CallbackI::getNrows() CallbackI::main() Description This is the abstract base class for user-written callback classes. It provides their common application programming interface (API). Callbacks may be called repeatedly at various points during an optimization; for each place a callback is called, ILOG CPLEX provides a separate callback class (derived from this class). Such a callback class provides the specific API as a protected method to use for the particular implementation. ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 98
IloCplex::CallbackI You do not create instances of this class; rather, you use one of its child classes to implement your own callback. In order to implement your user-written callbacks with an instance of IloCplex, you should follow these steps: ◆ ◆ ◆ Determine which kind of callback you want to write, and choose the appropriate class for it. The class hierarchy in Tree may give you some ideas here. Derive your own subclass, MyCallbackI, say, from the appropriate predefined callback class. In your subclass of the callback class, use the protected API defined in the base class to implement the main routine of your user-written callback. (All constructors of predefined callback classes are protected; they can be called only from userwritten derived subclasses.) ◆ In your subclass, implement the method duplicateCallback. ◆ ◆ Write a function myCallback, say, that creates an instance of your implementation class in the Concert Technology environment and returns it as an IloCplex::Callback handle. Create an instance of your callback class and pass it to the member function use. Note: Macros ILOXXXCALLBACKn (for n from 0 to 7) are available to facilitate steps 2 through 5, where XXX stands for the particular callback under construction and n stands for the number of parameters that the function written in step 5 is to receive in addition to the environment parameter. You can use one instance of a callback with only one instance of IloCplex. When you use a callback with a second instance of IloCplex, a copy will be automatically created using the method duplicateCallback, and that copy will be used instead. Also, an instance of IloCplex takes account of only one instance of a particular callback at any given time. That is, if you call use more than once with the same class of callback, the last call overrides any previous one. For example, you can use only one primal simplex callback at a time, or you can use only one network callback at a time; and so forth. There are two varieties of callbacks: ◆ Query callbacks enable your application to retrieve information about the current solution in an instance of IloCplex. The information available depends on the algorithm (primal simplex, dual simplex, barrier, mixed integer, or network) that you are using. For example, a query callback can return the current objective value, the number of simplex iterations that have been completed, and other details. Query ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 99
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ILOG CPLEX C++ API 9.0 Reference Ma
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T ABLE OF C ONTENTS IloCplex::Branc
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About This Manual This reference ma
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Concepts Branch & Cut IloCplex, lik
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It is possible to tell IloCplex to
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Group optim.cplex.cpp The API of IL
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IloCplex::Algorithm IloCplex::Basis
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ILOFLOAT, for continuous, ILOINT, f
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ILOBARRIERCALLBACK0 ILOBARRIERCALLB
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ILOCONTINUOUSCALLBACK0 ILOCONTINUOU
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ILOCPLEXGOAL0 } return 0; This macr
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ILOCUTCALLBACK0 ILOCUTCALLBACK0 Cat
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ILOFRACTIONALCUTCALLBACK0 ILOFRACTI
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ILOINCUMBENTCALLBACK0 ILOINCUMBENTC
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ILOMIPCALLBACK0 ILOMIPCALLBACK0 Cat
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ILONODECALLBACK0 ILONODECALLBACK0 C
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ILOPROBINGCALLBACK0 ILOPROBINGCALLB
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ILOSOLVECALLBACK0 ILOSOLVECALLBACK0
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IloCplex IloCplex Category Class In
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IloCplex public IloCplex::CplexStat
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IloCplex public void public void pu
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IloCplex IloCplex::NodeSelect IloCp
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IloCplex Mathematical Programming m
Page 48 and 49: IloCplex IloCplex effectively treat
Page 50 and 51: IloCplex classes that allow the use
Page 52 and 53: IloCplex When IloCplex is not divin
Page 54 and 55: IloCplex public const IloConstraint
Page 56 and 57: IloCplex This method deletes all la
Page 58 and 59: IloCplex to use for the constraint
Page 60 and 61: IloCplex public IloCplex::CplexStat
Page 62 and 63: IloCplex Note:CPLEX resizes these a
Page 64 and 65: IloCplex This method returns the nu
Page 66 and 67: IloCplex public IloCplex::PWLFormul
Page 68 and 69: IloCplex public void getValues(cons
Page 70 and 71: IloCplex This method creates and re
Page 72 and 73: IloCplex This method sets the prefe
Page 74 and 75: IloCplex its subgoals. See the conc
Page 76 and 77: IloCplex::Algorithm IloCplex::Algor
Page 78 and 79: IloCplex::BarrierCallbackI IloCplex
Page 80 and 81: IloCplex::BasisStatus IloCplex::Bas
Page 82 and 83: IloCplex::BoolParam IloCplex::BoolP
Page 84 and 85: IloCplex::BranchCallbackI IloCplex:
Page 86 and 87: IloCplex::BranchCallbackI ControlCa
Page 88 and 89: IloCplex::BranchCallbackI IloCplex:
Page 90 and 91: IloCplex::BranchCallbackI NodeData
Page 92 and 93: IloCplex::BranchCallbackI no branch
Page 94 and 95: IloCplex::BranchDirection IloCplex:
Page 96 and 97: IloCplex::Callback IloCplex::Callba
Page 100 and 101: IloCplex::CallbackI callbacks can a
Page 102 and 103: Callback::Type Callback::Type Categ
Page 104 and 105: IloCplex::ContinuousCallbackI Descr
Page 106 and 107: IloCplex::ControlCallbackI IloCplex
Page 108 and 109: IloCplex::ControlCallbackI MIPCallb
Page 110 and 111: IloCplex::ControlCallbackI This met
Page 112 and 113: IloCplex::ControlCallbackI For each
Page 114 and 115: ControlCallbackI::IntegerFeasibilit
Page 116 and 117: IloCplex::CplexStatus See also the
Page 118 and 119: IloCplex::CrossoverCallbackI IloCpl
Page 120 and 121: IloCplex::CutCallbackI IloCplex::Cu
Page 122 and 123: IloCplex::CutCallbackI from a user-
Page 124 and 125: IloCplex::DisjunctiveCutCallbackI I
Page 126 and 127: IloCplex::DualPricing IloCplex::Dua
Page 128 and 129: IloCplex::FlowMIRCutCallbackI IloCp
Page 130 and 131: IloCplex::FractionalCutCallbackI Il
Page 132 and 133: IloCplex::Goal IloCplex::Goal Categ
Page 134 and 135: IloCplex::GoalI IloCplex::GoalI Cat
Page 136 and 137: IloCplex::GoalI public IloInt publi
Page 138 and 139: IloCplex::GoalI Methods public void
Page 140 and 141: IloCplex::GoalI Returns the solutio
Page 142 and 143: IloCplex::GoalI const IloNumVarArra
Page 144 and 145: IloCplex::GoalI Returns the branch
Page 146 and 147: IloCplex::GoalI public IloBool isIn
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GoalI::BranchType GoalI::BranchType
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GoalI::IntegerFeasibilityArray Goal
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IloCplex::HeuristicCallbackI protec
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IloCplex::HeuristicCallbackI protec
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IloCplex::HeuristicCallbackI The pa
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IloCplex::IISStatusArray IloCplex::
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IloCplex::IncumbentCallbackI MIPCal
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IloCplex::IntParam IloCplex::IntPar
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IloCplex::IntParam See the referenc
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IloCplex::IntParam = CPX_PARAM_COLR
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IloCplex::IntParam = CPX_PARAM_FRAC
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IloCplex::InvalidCutException IloCp
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IloCplex::LazyConstraintCallbackI M
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IloCplex::MIPCallbackI protected Il
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IloCplex::MIPCallbackI IloCplex::No
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IloCplex::MIPCallbackI Returns the
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MIPCallbackI::NodeData MIPCallbackI
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IloCplex::MIPEmphasisType = CPX_MIP
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IloCplex::MultipleObjException IloC
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IloCplex::NetworkCallbackI The meth
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IloCplex::NodeCallbackI protected v
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IloCplex::NodeCallbackI protected I
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IloCplex::NodeEvaluator IloCplex::N
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IloCplex::NodeEvaluatorI IloCplex::
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IloCplex::NodeEvaluatorI branch, 0
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IloCplex::NodeSelect IloCplex::Node
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IloCplex::NumParam = CPX_PARAM_EPOP
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IloCplex::PWLFormulation IloCplex::
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IloCplex::PresolveCallbackI model,
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IloCplex::ProbingCallbackI IloCplex
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IloCplex::ProbingCallbackI This met
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IloCplex::Quality Primalobj, Primal
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IloCplex::Quality = CPX_SUM_X SumSc
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IloCplex::SearchLimit The default c
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IloCplex::SearchLimitI creates a go
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IloCplex::SimplexCallbackI ILOG CPL
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IloCplex::SolveCallbackI Inherited
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IloCplex::SolveCallbackI const IloN
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IloCplex::UnknownExtractableExcepti
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IloCplex::UserCutCallbackI MIPCallb
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IloCplex::VariableSelect Group opti
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IloCplex::PWLFormulation IloCplex::
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IloCplex::PWLFormulation Descriptio
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IloCplex::LazyConstraintCallbackI I
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IloCplex::UserCutCallbackI Inherite
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I NDEX ILOFRACTIONALCUTCALLBACK0 26
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ILOG CPLEX C++ API 9.0 Reference Manual

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