Postprocessors

The Postprocessor object is the pure-virtual base class for defining all Postprocessors in MOOSE. It defines a single method that all Postprocessors must override to produce a global scalar value. This method is generally called and stored in multiple Output formats once per time step (when applicable).

/**
 * This will get called to actually grab the final value the postprocessor has calculated.
 *
 * Note that this should only be called by internal methods, namely the problem that
 * actually sets the value globally for other things to use. If you want the value
 * outside of one of these external methods, you should use getCurrentValue().
 */
virtual PostprocessorValue getValue() const = 0;
(contrib/moose/framework/include/postprocessors/Postprocessor.h)