TAO_Offer_Database< LOCK_TYPE > Class Template Reference

#include <Offer_Database.h>

Collaboration diagram for TAO_Offer_Database< LOCK_TYPE >:

List of all members.

Classes
struct	Offer_Map_Entry
Public Types
typedef TAO_Service_Offer_Iterator < LOCK_TYPE >	offer_iterator
typedef ACE_Hash_Map_Manager_Ex < CORBA::String_var, Offer_Map_Entry *, ACE_Hash < CORBA::String_var > , ACE_Equal_To < CORBA::String_var > , ACE_Null_Mutex >	Offer_Database
Public Member Functions
	TAO_Offer_Database (void)
	No arg constructor.
	~TAO_Offer_Database (void)
CosTrading::OfferId	insert_offer (const char *type, CosTrading::Offer *offer)
int	remove_offer (const CosTrading::OfferId offer_id)
CosTrading::Offer *	lookup_offer (const CosTrading::OfferId offer_id)
CosTrading::Offer *	lookup_offer (const CosTrading::OfferId offer_id, char *&type_name)
TAO_Offer_Id_Iterator *	retrieve_all_offer_ids (void)
Private Member Functions
CosTrading::Offer *	lookup_offer (const char *type, CORBA::ULong id)
int	remove_offer (const char *type, CORBA::ULong id)
void	operator= (const TAO_Offer_Database< LOCK_TYPE > &)
	TAO_Offer_Database (const TAO_Offer_Database< LOCK_TYPE > &)
Static Private Member Functions
static CosTrading::OfferId	generate_offer_id (const char *type_name, CORBA::ULong id)
static void	parse_offer_id (const CosTrading::OfferId offer_id, char *&service_type, CORBA::ULong &id)
Private Attributes
LOCK_TYPE	db_lock_
Offer_Database	offer_db_
Friends
class	TAO_Service_Offer_Iterator< LOCK_TYPE >

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Detailed Description

template<class LOCK_TYPE>
class TAO_Offer_Database< LOCK_TYPE >

The TAO_Offer_Database encapsulates the mapping of service types to those offers exported with that service types. The underlying structure is a map of maps. The first maps maps the service type name to a map of exported offers. The second map maps the identifying index for that offer within the service types. So a service type name and an index uniquely identifies an exported offer. In fact, when the register export interface returns a CosTrading::OfferId, it's returning no more than a simple string concatenation of these two values. In addition to all these wonderful things, the TAO_Offer_Database has built-in locking, one reader/writer-style lock for modifying the top-level map and a reader/writer-style for each of the offer maps. Needless to say the locks are acquired when the TAO_Offer_Database performs operations on the structures they guard. NOTE: TAO_Offer_Database needs to be parameterized by a READER/WRITER LOCK, a RECURSIVE MUTEX, or a NULL MUTEX, not a simple binary mutex! Mutexes will cause deadlock when you try to contruct an iterator (which acquires a read lock on the map under an existing read lock). Just don't do it, ok?

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Member Typedef Documentation

template<class LOCK_TYPE>

typedef ACE_Hash_Map_Manager_Ex< CORBA::String_var, Offer_Map_Entry*, ACE_Hash<CORBA::String_var>, ACE_Equal_To<CORBA::String_var>, ACE_Null_Mutex > TAO_Offer_Database< LOCK_TYPE >::Offer_Database

template<class LOCK_TYPE>

typedef TAO_Service_Offer_Iterator<LOCK_TYPE> TAO_Offer_Database< LOCK_TYPE >::offer_iterator

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Constructor & Destructor Documentation

template<class LOCK_TYPE >

TAO_Offer_Database< LOCK_TYPE >::TAO_Offer_Database

(

void

)

No arg constructor.

template<class LOCK_TYPE >

TAO_Offer_Database< LOCK_TYPE >::~TAO_Offer_Database

(

void

)

template<class LOCK_TYPE>

TAO_Offer_Database< LOCK_TYPE >::TAO_Offer_Database

(

const TAO_Offer_Database< LOCK_TYPE > &

)

[private]

---

Member Function Documentation

template<class LOCK_TYPE >

CosTrading::OfferId TAO_Offer_Database< LOCK_TYPE >::generate_offer_id	(	const char *	type_name,
		CORBA::ULong	id
	)		[static, private]

Take in a service type name for the offer the current value of of the counter and generate an offer id.

template<class LOCK_TYPE >

CosTrading::OfferId TAO_Offer_Database< LOCK_TYPE >::insert_offer	(	const char *	type,
		CosTrading::Offer *	offer
	)

Add an offer of type @ type and generate a CosTrading::OfferId for it. Returns 0 on failure.

template<class LOCK_TYPE >

CosTrading::Offer * TAO_Offer_Database< LOCK_TYPE >::lookup_offer

(

const CosTrading::OfferId

offer_id

)

Lookup an offer whose offer_id is offer_id, and return it. Otherwise, throw the appropriate exception.

template<class LOCK_TYPE >

CosTrading::Offer * TAO_Offer_Database< LOCK_TYPE >::lookup_offer	(	const CosTrading::OfferId	offer_id,
		char *&	type_name
	)

Lookup an offer whose OfferId is offer_id and return in type_name the type name of the object. Type name is just a pointer to a location in offer_id, so DON'T DELETE IT.

template<class LOCK_TYPE >

CosTrading::Offer * TAO_Offer_Database< LOCK_TYPE >::lookup_offer	(	const char *	type,
		CORBA::ULong	id
	)		[private]

Lookup an offer whose type is @ type and id, id. Return 0 on failure.

template<class LOCK_TYPE>

void TAO_Offer_Database< LOCK_TYPE >::operator=

(

const TAO_Offer_Database< LOCK_TYPE > &

)

[private]

template<class LOCK_TYPE >

void TAO_Offer_Database< LOCK_TYPE >::parse_offer_id	(	const CosTrading::OfferId	offer_id,
		char *&	service_type,
		CORBA::ULong &	id
	)		[static, private]

Take in a previously generated offer id and return the type and id that were used to generate the offer id.

template<class LOCK_TYPE >

int TAO_Offer_Database< LOCK_TYPE >::remove_offer

(

const CosTrading::OfferId

offer_id

)

template<class LOCK_TYPE >

int TAO_Offer_Database< LOCK_TYPE >::remove_offer	(	const char *	type,
		CORBA::ULong	id
	)		[private]

Remove an offers whose id is . Returns 0 on success, -1 on failure, and throws a CosTrading::IllegalOfferId if it can't parse the CosTrading::OfferId.

template<class LOCK_TYPE >

TAO_Offer_Id_Iterator * TAO_Offer_Database< LOCK_TYPE >::retrieve_all_offer_ids

(

void

)

Return an iterator that will traverse and return all the offer ids in the service type map.

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Friends And Related Function Documentation

template<class LOCK_TYPE>

friend class TAO_Service_Offer_Iterator< LOCK_TYPE > [friend]

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Member Data Documentation

template<class LOCK_TYPE>

LOCK_TYPE TAO_Offer_Database< LOCK_TYPE >::db_lock_ [private]

template<class LOCK_TYPE>

Offer_Database TAO_Offer_Database< LOCK_TYPE >::offer_db_ [private]

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

• Offer_Database.h
• Offer_Database.cpp