DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader > Class Template Reference

The DtMessageFactory template can be instantiated to declare a message factory for a given message class. More...

Inheritance diagram for DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >:

Collaboration diagram for DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >:

Public Types
typedef T_Message *(*	DtReceiveMessageCreator )(const T_NetworkHeader *packet, MAKRti::DtBufferPtr buffer)
	Function type for creating messages received from the network using the given message header and packet buffer.
typedef T_Message *(*	DtSendMessageCreator )(MAKRti::DtBufferPtr buffer)
	Function type for creating blank messages for sending.
typedef std::map < T_MessageKind, DtReceiveMessageCreator >	DtReceiveCreatorMap
	A map from message kind to a receive creator function.
typedef std::map < T_MessageKind, DtSendMessageCreator >	DtSendCreatorMap
	A map from message kind to a send creator function.

Public Member Functions
	DtMessageFactory ()
	Constructor - Default.
	DtMessageFactory (const DtMessageFactory &orig)
	Constructor - Copy.
	~DtMessageFactory ()
	Destructor.
DtMessageFactory &	operator= (const DtMessageFactory &orig)
	Operator - Assignment.
T_Message *	create (T_MessageKind kind, MAKRti::DtBufferPtr buffer=DtUSE_INTERNAL_BUFFER)
	Create a blank message to be filled.
T_Message *	create (const T_NetworkHeader *packet, MAKRti::DtBufferPtr buffer=DtUSE_INTERNAL_BUFFER)
	When receiving, the RTI will use the first create message to construct a message based on its net type.
DtSendMessageCreator	addSendCreator (T_MessageKind kind, DtSendMessageCreator creator)
	Add to the factory a msg creation function used for sending messages.
DtReceiveMessageCreator	addRecvCreator (T_MessageKind kind, DtReceiveMessageCreator creator)
	Add to the factory a msg creation function used for receiving messages.
void	addCreators (T_MessageKind kind, DtReceiveMessageCreator rCreator, DtSendMessageCreator sCreator)
	Add both types of msg creators (for sending and receiving) at once.
int	packetGood (const T_NetworkHeader *packet) const
	Check that the message packet is good.

Static Public Member Functions
static int	dfltPacketGood (const T_NetworkHeader *packet)
	Default check for packet being good.

Protected Attributes
DtSendCreatorMap	mySendCreators
	A map of the send message creator functions.
DtReceiveCreatorMap	myReceiveCreators
	A map of the receive message creator functions.

Detailed Description

template<typename T_Message, typename T_MessageKind, typename T_NetworkHeader>
class DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >

The DtMessageFactory template can be instantiated to declare a message factory for a given message class.

The resulting message factory is used to create messages of specific message kinds. Typically, a base type is defined for a given message class and then specific factories are derived from it. Creator functions are added for each message kind. The factory can then be used to create a message for a specific message kind while only knowing about the higher level message class abstraction.

Parameters

T_Message	- the message class
T_MessageKind	- the message kind enumeration type
T_NetworkHeader	- The message network header class defines the network layout of the header portion of the message.

Member Typedef Documentation

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

typedef std::map<T_MessageKind, DtReceiveMessageCreator> DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtReceiveCreatorMap

A map from message kind to a receive creator function.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

typedef T_Message*(* DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtReceiveMessageCreator)(const T_NetworkHeader *packet, MAKRti::DtBufferPtr buffer)

Function type for creating messages received from the network using the given message header and packet buffer.

Parameters

packet	- the memory containing the network message used to construct the message
buffer	- The memory used to store the constructed message; allocated if value is 0

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

typedef std::map<T_MessageKind, DtSendMessageCreator> DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtSendCreatorMap

A map from message kind to a send creator function.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

typedef T_Message*(* DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtSendMessageCreator)(MAKRti::DtBufferPtr buffer)

Function type for creating blank messages for sending.

Parameters

buffer

- The memory used to store the constructed message; allocated if value is 0

Constructor & Destructor Documentation

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtMessageFactory

(

)

Constructor - Default.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::DtMessageFactory

(

const DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader > &

orig

)

Constructor - Copy.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::~DtMessageFactory

(

)

Destructor.

Member Function Documentation

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

void DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::addCreators	(	T_MessageKind	kind,
		DtReceiveMessageCreator	rCreator,
		DtSendMessageCreator	sCreator
	)

Add both types of msg creators (for sending and receiving) at once.

Warning

Any previous msg creation functions are overwritten.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtReceiveMessageCreator DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::addRecvCreator	(	T_MessageKind	kind,
		DtReceiveMessageCreator	creator
	)

Add to the factory a msg creation function used for receiving messages.

The function must return a new'ed msg object which will be deleted by the user.

Parameters

kind	- creator will be used for messages of this kind
creator	- the creator function
return	- previous msg creation function (0 if none) which was replaced by the add

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtSendMessageCreator DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::addSendCreator	(	T_MessageKind	kind,
		DtSendMessageCreator	creator
	)

Add to the factory a msg creation function used for sending messages.

The function must return a new'ed msg object which will be deleted by the user.

Parameters

kind	- creator will be used for messages of this kind
creator	- the creator function
return	- previous msg creation function (0 if none) which was replaced by the add

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

T_Message* DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::create	(	T_MessageKind	kind,
		MAKRti::DtBufferPtr	buffer = DtUSE_INTERNAL_BUFFER
	)

Create a blank message to be filled.

Parameters

kind	- the message kind to create
buffer	- The memory used to store the constructed message; allocated if value is 0
return	- constructed message or NULL if message kind doesn't have a creation function in the factory.

Warning

Typically used for sending messages.

Caller is responsible for deleting constructed message.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

T_Message* DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::create	(	const T_NetworkHeader *	packet,
		MAKRti::DtBufferPtr	buffer = DtUSE_INTERNAL_BUFFER
	)

When receiving, the RTI will use the first create message to construct a message based on its net type.

Note: Caller is responsible for deleting. Returns NULL if creation function is not in the factory. Create a message from the provided network packet.

Parameters

packet	- the message packet used to create the message; the packet must contain a message header and the message kind is extracted from it.
buffer	- The memory used to store the constructed message; allocated if value is 0
return	- constructed message or NULL if message kind doesn't have a creation function in the factory.

Warning

Typically used for receiving messages.

Caller is responsible for deleting constructed message.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

static int DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::dfltPacketGood ( const T_NetworkHeader *  packet )

static

Default check for packet being good.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtMessageFactory& DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::operator=

(

const DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader > &

orig

)

Operator - Assignment.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

int DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::packetGood

(

const T_NetworkHeader *

packet

)

const

Check that the message packet is good.

Member Data Documentation

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtReceiveCreatorMap DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::myReceiveCreators

protected

A map of the receive message creator functions.

template<typename T_Message , typename T_MessageKind , typename T_NetworkHeader >

DtSendCreatorMap DtMessageFactory< T_Message, T_MessageKind, T_NetworkHeader >::mySendCreators

protected

A map of the send message creator functions.

---

The documentation for this class was generated from the following file:

• messageFactory.h