ilog.cplex
Class IloCplex.Callback

java.lang.Object
  |
  +--ilog.cplex.IloCplex.Callback

Direct Known Subclasses:

IloCplex.CrossoverCallback, IloCplex.LPCallback, IloCplex.MIPCallback, IloCplex.NetworkCallback, IloCplex.PresolveCallback

public abstract static class IloCplex.Callback

extends java.lang.Object

The callback base class. This class defines the common interface available to all callback classes. Callbacks are objects with a method main() implemented by the user which is called by the IloCplex algorithm at specific points during the optimization. For each of these points, an extension of IloCplex.Callback is provided. To implement and use a particular callback, the following steps must be carried out:

• Select the callback class corresponding to the callback to be implemented, and create an extension of that class.
• Implement method main() for this extension. When doing so you may use all of the methods defined in the callback class and its base classes.
• Create an instance of the user-written callback class and pass it to IloCplex with method IloCplex.use().

The next time a solution method is exectued on the IloCplex object for which the callback has been set the callbacks method main() will be called each time the corresponding point in the optimization algorithm is reached.

See Also:

IloCplex.use(ilog.cplex.IloCplex.Callback)

Method Summary

protected void	abort() Aborts current optimization.
protected abstract void	main() The method to be implemented by user callback classes.

Methods inherited from class java.lang.Object

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

Method Detail

main

protected abstract void main()
                      throws IloException

The method to be implemented by user callback classes.

abort

protected void abort()

Aborts current optimization. This method can be called from a user-written implementation of method main() to instruct the invoking IloCplex optimizer to abort the current optimization.