ContinuousCallbackI

An instance of a class derived from IloCplex::ContinuousCallbackI represents a user-written callback in a CPLEX application that uses an instance of IloCplex with the primal simplex, dual simplex, or barrier optimizer. IloCplex calls the user-written callback after each iteration during an optimization of a problem solved at a node.

In the case of concurrent optimization, CPLEX calls the user-written callback only in the main thread, not in other concurrent threads.

This class offers methods for use within the callbacks you write. In particular, there are methods in this class to access primal and dual feasibility, number of iterations, and objective value.

The methods of this class are protected for use in deriving a user-written callback class and in implementing the main method there.

If an attempt is made to access information not available to an instance of this class, an exception is thrown.

Note

There are special callbacks for simplex and barrier, that is, IloCplex::SimplexCallbackI and IloCplex::BarrierCallbackI, respectively. Using a continuous callback sets this callback in both of these algorithms. If a special callback was already set for one of these algorithms, (for example, simplex) it is replaced by the general continuous callback.

Method Summary
`protected`	`ContinuousCallbackI(IloEnv env)`
`public IloNum`	`getDualInfeasibility() const`
`public IloNum`	`getInfeasibility() const`
`public IloInt`	`getNiterations() const`
`public IloInt64`	`getNiterations64() const`
`public IloNum`	`getObjValue() const`
`protected Callback::Type`	`getType() const`
`public IloBool`	`isDualFeasible() const`
`public IloBool`	`isFeasible() const`

Inherited Methods from `OptimizationCallbackI`
`getModel, getNcols, getNQCs, getNrows`

Inherited Methods from `CallbackI`
`abort, duplicateCallback, getCplexTime, getDetTime, getEndDetTime, getEndTime, getEnv, getStartDetTime, getStartTime, getType, main`

This constructor creates a callback for use in an application that solves continuous models.

This method returns the current dual infeasibility measure of the solution in the instance of IloCplex at the time the invoking callback is executed.

This method returns the current primal infeasibility measure of the solution in the instance of IloCplex at the time the invoking callback is executed.

This method returns the number of iterations completed so far by an instance of IloCplex at the invoking callback is executed.

This method returns the current objective value of the solution in the instance of IloCplex at the time the invoking callback is executed.

If you need the object representing the objective itself, consider the method IloCplex::getObjective instead.

This method returns IloTrue if the current solution is dual feasible.

This method returns IloTrue if the current solution is primal feasible.

This method returns the callback type of the invoking callback object.

Class IloCplex::ContinuousCallbackI