Where Query Callbacks Are Called

ILOG CPLEX 11.0 User's Manual > Advanced Programming Techniques > Using Optimization Callbacks > Query or Diagnostic Callbacks > Where Query Callbacks Are Called

Where Query Callbacks Are Called

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Query or diagnostic callbacks are distinguished by the place where they are called during an optimization. There are nine such places where ILOG CPLEX calls a query or diagnostic callback:

The presolve query callback is called regularly during presolve.

IloCplex::PresolveCallbackI in the C++ API
IloCplex.PresolveCallback in the Java API
Cplex.PresolveCallback in the .NET API
CPXsetlpcallbackfunc in the Callable Library (C API)

The crossover query callback is called regularly during crossover from a barrier solution to a simplex basis.

IloCplex::CrossoverCallbackI in the C++ API
IloCplex.CrossoverCallback in the Java API
Cplex.CrossoverCallback in the .NET API
CPXsetlpcallbackfunc in the Callable Library (C API)

The network query callback is called regularly during the network simplex algorithm.

IloCplex::NetworkCallbackI in the C++ API
IloCplex.NetworkCallback in the Java API
Cplex.NetworkCallback in the .NET API
CPXsetnetcallbackfunc in the Callable Library (C API)

The barrier query callback is called at each iteration during the barrier algorithm.

IloCplex::BarrierCallbackI or IloCplex::ContinuousCallbackI in the C++ API
IloCplex.BarrierCallback or IloCplex.ContinuousCallback in the Java API
Cplex.BarrierCallback or Cplex.ContinuousCallback in the .NET API
CPXsetlpcallbackfunc in the Callable Library (C API)

The simplex query callback is called at each iteration during the simplex algorithm.

IloCplex::SimplexCallbackI or IloCplex::ContinuousCallbackI in the C++ API
IloCplex.SimplexCallback or IloCplex.ContinuousCallback in the Java API
Cplex.SimplexCallback or Cplex.ContinuousCallback in the .NET API
CPXsetlpcallbackfunc in the Callable Library (C API)

The MIP query callback is called regularly during the branch and cut search.

IloCplex::MIPCallbackI in the C++ API
IloCplex.MIPCallback in the Java API
Cplex.MIPCallback in the .NET API
CPXsetmipcallbackfunc in the Callable Library (C API)

The probing query callback is called regularly during probing.

IloCplex::ProbingCallbackI in the C++ API
IloCplex.ProbingCallback in the Java API
Cplex.ProbingCallback in the .NET API

The fractional cut query callback is called regularly during the generation of fractional cuts.

IloCplex::FractionalCutCallbackI in the C++ API
IloCplex.FractionalCutCallback in the Java API
Cplex.FractionalCutCallback in the .NET API

The disjunctive cut query callback is called regularly during the generation of disjunctive cuts.

IloCplex::DisjunctiveCutCallbackI in the C++ API
IloCplex.DisjunctiveCutCallback in the Java API
Cplex.DisjunctiveCutCallback in the .NET API

In the C++ API, a query callback is installed by the method IloCplex::use.

In the Java API, a query callback is installed by the method IloCplex.use.

In the .NET API, a query callback is installed by the method Cplex.Use.

In Callable Library applications (C API), a query callback is a user-written function installed by the routine CPXsetmipcallbackfunc, CPXsetlpcallbackfunc, or CPXsetnetcallbackfunc.

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