Specialized mlr3misc::Callback for asynchronous optimization.
Callbacks allow to customize the behavior of processes in bbotk.
The callback_async() function creates a CallbackAsync.
Predefined callbacks are stored in the dictionary mlr_callbacks and can be retrieved with clbk().
For more information on optimization callbacks see callback_async().
mlr3misc::Callback -> CallbackAsync
on_optimization_begin(function())
Stage called at the beginning of the optimization in the main process.
Called in Optimizer$optimize().
on_worker_begin(function())
Stage called at the beginning of the optimization on the worker.
Called in the worker loop.
on_optimizer_before_eval(function())
Stage called after the optimizer proposes points.
Called in OptimInstance$.eval_point().
on_optimizer_after_eval(function())
Stage called after points are evaluated.
Called in OptimInstance$.eval_point().
on_worker_end(function())
Stage called at the end of the optimization on the worker.
Called in the worker loop.
on_result_begin(function())
Stage called before the results are written.
Called in OptimInstance$assign_result().
on_result_end(function())
Stage called after the results are written.
Called in OptimInstance$assign_result().
on_optimization_end(function())
Stage called at the end of the optimization in the main process.
Called in Optimizer$optimize().