MqFactoryC_C_API

MqFactoryC - the class known as fct or factory is used to provide an interface to create one or more new MqContextC … More...

Collaboration diagram for MqFactoryC_C_API:

Topics
	MqFactoryC_Class_C_API
	MqFactoryC - define the class …
	MqFactoryC_TOR_C_API
	MqFactoryC - various functions to create, initialize and destroy a factory …
	MqFactoryC_Get_C_API
	MqFactoryC - various functions to 'get' data out of a factory …
	MqFactoryC_Misc_C_API
	MqFactoryC - various functions to work on a factory …

Data Structures
struct	MqFactoryCTorS
	interface for the constructor More...
struct	MqFactoryDTorS
	interface for the destructor More...
struct	MqFactoryS
	data used to define a factory More...

Macros
#define	MqFactoryPanic(fct)
#define	MQ_CALLBACK_FACTORY_CTOR_ARGS
	the MqFactoryCTorF arguments with default names
#define	MQ_CALLBACK_FACTORY_CTOR_CALL   MQ_RT_CALL tmpl, create, fct, contextP

Typedefs
typedef enum MkErrorE(*	MqFactoryCTorF) (MK_RT mkrt, MQ_RT mqrt, MQ_CTX const tmpl, enum MqFactoryE create, MQ_FCT const fct, MQ_CTX *ctx_out)
	type of a MqFactoryC constructor
typedef void(*	MqFactoryDTorF) (MK_RT mkrt, MQ_CTX ctx, bool doFactoryCleanup, MQ_FCT const fct)
	type of a MqFactoryC destructor
typedef void(*	MqFactoryDataFreeF) (MK_RT mkrt, MK_PTR *dataP)
	prototype for a free additional factory data function
typedef void(*	MqFactoryDataCopyF) (MK_RT mkrt, MK_PTR *dataP)
	prototype for a copy additional factory data function

Detailed Description

MqFactoryC - the class known as fct or factory is used to provide an interface to create one or more new MqContextC …

The factory is an important part of the object management and has the following basic features:

1. create/delete a MqContextC defined by a MqFactoryC
2. infrastructure to host multiple MqFactoryC in a single executable
3. provide an identifier used for factory-lookup and as an unique-application-name
4. identification of a client and a server in an application-link

Without a factory only the pipe-feature without the child-feature is guaranteed to work. Other features may work, this depends of the "flexibility" of the programming-language.

The link between the MqFactoryS-identifier and the MqFactoryC is important for the future development of pymqmsgque. Message-Routing, Service-Location and Persistent-Transactions depend on this feature.

The relationship between the MqFactoryC and the MqContextC is the same as the relationship between a type (MqFactoryS) and an object (MqContextS) of a regular programming language. The MqFactoryC define the type of the server and the MqContextC define a single object of the server process or thread.

                                     Application
|-------------------------------------------------------------------------------------|
|--------------- physical host 1 -----------------------|------ physical host 2 ------|
|-------- process-1 --------|-------- process-2 --------|-- process-3 --|---- … ------|
 thread-1     thread-2…      thread-1…     thread-2…      thread-1…       thread-…
  factory-A     factory-X     factory-Y…    factory-Z…
   object-1     object-1   object-…    …
   object-2     object-2   …
   object-3     object-3
   …              …

A server has a single MqFactoryC object per thread or process but multiple MqFactoryC objects per application. Decreasing the size and the complexity of a MqContextC object will improve the server performance. In future more fields, defined in the MqSetupS attribute of the the MqContextC object, will move into MqFactoryC object.

Macro Definition Documentation

MQ_CALLBACK_FACTORY_CTOR_ARGS

#define MQ_CALLBACK_FACTORY_CTOR_ARGS

Value:

  MQ_RT_ARGS                             \
  MQ_CTX const tmpl,                     \
  enum MqFactoryE create,                \
  struct MqFactoryS * const fct,         \
  MQ_CTX *contextP                       \

the MqFactoryCTorF arguments with default names

Definition at line 3057 of file LibMqMsgque_mq.h.

#define MQ_CALLBACK_FACTORY_CTOR_ARGS    \
  MQ_RT_ARGS                             \
  MQ_CTX const tmpl,                     \
  enum MqFactoryE create,                \
  struct MqFactoryS * const fct,         \
  MQ_CTX *contextP                       \
 

MQ_CALLBACK_FACTORY_CTOR_CALL

#define MQ_CALLBACK_FACTORY_CTOR_CALL   MQ_RT_CALL tmpl, create, fct, contextP

Definition at line 3064 of file LibMqMsgque_mq.h.

MqFactoryPanic

#define MqFactoryPanic

(

fct

)

Value:

if (fct == NULL) MkPanicC(MK_ERROR_PANIC, __func__, -1, "MqFactoryS exception");

Definition at line 3036 of file LibMqMsgque_mq.h.

Typedef Documentation

MqFactoryCTorF

typedef enum MkErrorE( * MqFactoryCTorF) (MK_RT mkrt, MQ_RT mqrt, MQ_CTX const tmpl, enum MqFactoryE create, MQ_FCT const fct, MQ_CTX *ctx_out)

type of a MqFactoryC constructor

Parameters

[in]	mkrt	the MkRuntimeS instance to work on - the runtime argument, used by MK_RT_CALL (C-only)
[in]	mqrt	the MqRuntimeS instance to work on - the runtime argument, used by MQ_RT_CALL (C-only)
[in]	tmpl	the calling object to initialize the configuration data using MqSetupDup
[in]	create	how is the factory constructor used
[in]	fct	factory interface in use
[out]	ctx_out	the new object

Exceptions

MkExceptionC

→ The default-exception from the Programming-Language-Micro-Kernel (PLMK)

Definition at line 2965 of file LibMqMsgque_mq.h.

MqFactoryDataCopyF

typedef void( * MqFactoryDataCopyF) (MK_RT mkrt, MK_PTR *dataP)

prototype for a copy additional factory data function

Definition at line 3097 of file LibMqMsgque_mq.h.

MqFactoryDataFreeF

typedef void( * MqFactoryDataFreeF) (MK_RT mkrt, MK_PTR *dataP)

prototype for a free additional factory data function

Definition at line 3089 of file LibMqMsgque_mq.h.

MqFactoryDTorF

typedef void( * MqFactoryDTorF) (MK_RT mkrt, MQ_CTX ctx, bool doFactoryCleanup, MQ_FCT const fct)

type of a MqFactoryC destructor

• this callback will be called at MqContextDelete to cleanup factory-related-data.
• the MqContextDelete have to be called again to finish the cleanup of context-related-data.

Parameters

[in]	mkrt	the MkRuntimeS instance to work on - the runtime argument, used by MK_RT_CALL (C-only)
[in]	ctx	the MqContextS instance to work on
[in]	doFactoryCleanup	was the object created with a factory ? MK_YES -> the context was created by MqFactoryInvoke using fct MK_NO -> the context was created by MqContextCreate
[in]	fct	factory-interface used to create the object, the factory entry at MqSetupS::factory was set to None in MqContextCreate to garantee a one time execution of this code

Definition at line 3079 of file LibMqMsgque_mq.h.