Provides hash-table-based persistent storage for name to object bindings in a Naming Context. More...

#include <Persistent_Naming_Context.h>

Inheritance diagram for TAO_Persistent_Bindings_Map:

Collaboration diagram for TAO_Persistent_Bindings_Map:

Public Types
typedef ACE_Hash_Map_With_Allocator < TAO_Persistent_ExtId, TAO_Persistent_IntId >	HASH_MAP
	Underlying data structure - typedef for ease of use.
Public Member Functions
	TAO_Persistent_Bindings_Map (CORBA::ORB_ptr orb)
	Constructor.
int	open (size_t hash_map_size, ACE_Allocator *alloc)
void	set (HASH_MAP map, ACE_Allocator alloc)
virtual	~TAO_Persistent_Bindings_Map (void)
void	destroy (void)
HASH_MAP *	map (void)
	Get a pointer to the underlying hash map.
size_t	total_size (void)
	Return the size of the underlying hash table.
virtual size_t	current_size (void)
	Return the size of the underlying hash table.
virtual int	bind (const char id, const char kind, CORBA::Object_ptr obj, CosNaming::BindingType type)
virtual int	rebind (const char id, const char kind, CORBA::Object_ptr obj, CosNaming::BindingType type)
virtual int	unbind (const char id, const char kind)
virtual int	find (const char id, const char kind, CORBA::Object_ptr &obj, CosNaming::BindingType &type)
Protected Member Functions
int	open_helper (size_t hash_table_size, void *buffer)
int	shared_bind (const char id, const char kind, CORBA::Object_ptr obj, CosNaming::BindingType type, int rebind)
	Helper: factors common code from <bind> and <rebind>.
Protected Attributes
ACE_Allocator *	allocator_
	Pointer to the allocator we use to make bindings persistent.
HASH_MAP *	map_
	Pointer to the underlying hash map.
CORBA::ORB_var	orb_
	Pointer to the orb. We need it to do string/object conversions.

Detailed Description

Provides hash-table-based persistent storage for name to object bindings in a Naming Context.

Wrapper on top of ACE_Hash_Map_With_Allocator (which is a wrapper around ACE_Hash_Map_Manager). Uses ACE_Allocator (allocating from persistent storage) to make bindings persistent and supports TAO_Bindings_Map interface. Used by TAO_Persistent_Naming_Context.

Member Typedef Documentation

typedef ACE_Hash_Map_With_Allocator<TAO_Persistent_ExtId, TAO_Persistent_IntId> TAO_Persistent_Bindings_Map::HASH_MAP

Underlying data structure - typedef for ease of use.

Constructor & Destructor Documentation

TAO_Persistent_Bindings_Map::TAO_Persistent_Bindings_Map ( CORBA::ORB_ptr orb )

Constructor.

TAO_Persistent_Bindings_Map::~TAO_Persistent_Bindings_Map ( void ) [virtual]

Destructor. Does not deallocate the hash map: if an instance of this class goes out of scope, its hash_map remains in persistent storage.

Member Function Documentation

int TAO_Persistent_Bindings_Map::bind	(	const char *	id,
		const char *	kind,
		CORBA::Object_ptr	obj,
		CosNaming::BindingType	type
	)		`[virtual]`

Add a binding with the specified parameters to the table. Return 0 on success and -1 on failure, 1 if there already is a binding with <id> and <kind>.

Implements TAO_Bindings_Map.

size_t TAO_Persistent_Bindings_Map::current_size ( void ) [virtual]

Return the size of the underlying hash table.

Implements TAO_Bindings_Map.

void TAO_Persistent_Bindings_Map::destroy ( void )

This method removes the hash map from persistent storage/frees up the memory. The hash map better be empty, since we are not cleaning up the insides. (We could add <close> to clean entries, but not the data inside the entries.

int TAO_Persistent_Bindings_Map::find	(	const char *	id,
		const char *	kind,
		CORBA::Object_ptr &	obj,
		CosNaming::BindingType &	type
	)		`[virtual]`

Find the binding containing <id> and <kind> in the table, and pass binding's type and object back to the caller by reference. Return 0 on success and -1 on failure. Note: a 'duplicated' object reference is assigned to <obj>, so the caller is responsible for its deallocation.

Implements TAO_Bindings_Map.

TAO_Persistent_Bindings_Map::HASH_MAP * TAO_Persistent_Bindings_Map::map ( void )

Get a pointer to the underlying hash map.

int TAO_Persistent_Bindings_Map::open	(	size_t	hash_map_size,
		ACE_Allocator *	alloc
	)

Allocate hash map of size <hash_map_size> from persistent storage using the <alloc>.

int TAO_Persistent_Bindings_Map::open_helper	(	size_t	hash_table_size,
		void *	buffer
	)		`[protected]`

Helper to the <open> method. By isolating placement new into a separate method, we can deal with memory allocation failures more efficiently. If there is a problem in HASH_MAP constructor, we can clean up preallocated space.

int TAO_Persistent_Bindings_Map::rebind	(	const char *	id,
		const char *	kind,
		CORBA::Object_ptr	obj,
		CosNaming::BindingType	type
	)		`[virtual]`

Overwrite a binding containing <id> and <kind> (or create a new one if one doesn't exist) with the specified parameters. Return 0 or 1 on success. Return -1 or -2 on failure. (-2 is returned if the new and old bindings differ in type).

Implements TAO_Bindings_Map.

void TAO_Persistent_Bindings_Map::set	(	HASH_MAP *	map,
		ACE_Allocator *	alloc
	)

The hash map has already been preallocated for us. We just need to set our data members take ownership of it.

int TAO_Persistent_Bindings_Map::shared_bind	(	const char *	id,
		const char *	kind,
		CORBA::Object_ptr	obj,
		CosNaming::BindingType	type,
		int	rebind
	)		`[protected]`