handling-patterns.hpp File Reference

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Description

A hard wired collection of predefined command handling patterns.

There is a small number of different possibilities to handle execution and UNDO of Steam-Layer commands. Each of these is defined as a subclass in this header and then hard wired into a small table. Handling patterns are stateless singleton objects, thus we build using multiple Singleton factory objects and configure them hard wired with the respective implementation classes. The index positions in this table match the sequence within the enum HandlingPattern::ID; all of this is done hard wired and without any dynamic configuration.

See also

SteamDispatcher

Session

Definition in file handling-patterns.hpp.

#include "lib/error.hpp"
#include "lib/multifact.hpp"
#include "steam/control/handling-pattern.hpp"
#include "steam/control/command-impl.hpp"

Classes
class	BasicHandlingPattern
	Handling Pattern Foundation: invoke command directly and without any external intervention. More...
class	InvokeAsync
	Handling Pattern: just schedule command to be invoked asynchronously. More...
class	InvokeSyncNoThrow
	Handling Pattern: invoke blocking, translate exceptions into an error state. More...
class	InvokeSyncThrow
	Handling Pattern: invoke blocking, propagating any exceptions immediately. More...

Typedefs
typedef lib::factory::MultiFact< HandlingPattern &, HandlingPattern::ID >	HandlingPatternFactory

Functions
HandlingPattern const &	getPatternInstance (HandlingPattern::ID id)
	access the singleton instance for a given ID

Variables
HandlingPatternFactory::Singleton< InvokeSyncNoThrow >	holder1 (patternTable, HandlingPattern::SYNC)
HandlingPatternFactory::Singleton< InvokeSyncThrow >	holder2 (patternTable, HandlingPattern::SYNC_THROW)
HandlingPatternFactory::Singleton< InvokeAsync >	holder3 (patternTable, HandlingPattern::ASYNC)
HandlingPatternFactory::Singleton< BasicHandlingPattern >	holder4 (patternTable, HandlingPattern::DUMMY)
HandlingPatternFactory	patternTable
	holds singleton pattern instances by ID

Namespaces
	steam
	Steam-Layer implementation namespace root.
	steam::control
	Steam-Layer dispatcher, controller and administrative facilities.