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TAO_Persistent_Bindings_Map Class Reference

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:

[legend]Collaboration diagram for TAO_Persistent_Bindings_Map:

[legend]List of all members.

Public Types
typedef ACE_Hash_Map_With_Allocator< TAO_Persistent_ExtId, TAO_Persistent_IntId >	HASH_MAP
	Underlying data structure - typedef for ease of use. More...
Public Methods
	TAO_Persistent_Bindings_Map (CORBA::ORB_ptr orb)
	Constructor. More...
int	open (size_t hash_map_size, ACE_Allocator *alloc)
	Allocate hash map of size <hash_map_size> from persistent storage using the <alloc>. More...
void	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. More...
virtual	~TAO_Persistent_Bindings_Map (void)
	Destructor. Does not deallocate the hash map: if an instance of this class goes out of scope, its hash_map remains in persistent storage. More...
void	destroy (void)
	This method removes the hash map from persistent storage/frees up the memory. More...
HASH_MAP *	map (void)
	Get a pointer to the underlying hash map. More...
size_t	total_size (void)
	Return the size of the underlying hash table. More...
virtual size_t	current_size (void)
	Return the size of the underlying hash table. More...
virtual int	bind (const char *id, const char *kind, CORBA::Object_ptr obj, CosNaming::BindingType type)
	Add a binding with the specified parameters to the table. More...
virtual int	rebind (const char *id, const char *kind, CORBA::Object_ptr obj, CosNaming::BindingType type)
	Overwrite a binding containing <id> and <kind> (or create a new one if one doesn't exist) with the specified parameters. More...
virtual int	unbind (const char *id, const char *kind)
	Remove a binding containing <id> and <kind> from the table. More...
virtual int	find (const char *id, const char *kind, CORBA::Object_ptr &obj, CosNaming::BindingType &type)
	Find the binding containing <id> and <kind> in the table, and pass binding's type and object back to the caller by reference. More...
Protected Methods
int	open_helper (size_t hash_table_size, void *buffer)
	Helper to the <open> method. More...
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>. More...
Protected Attributes
ACE_Allocator *	allocator_
	Pointer to the allocator we use to make bindings persistent. More...
HASH_MAP *	map_
	Pointer to the underlying hash map. More...
CORBA::ORB_var	orb_
	Pointer to the orb. We need it to do string/object conversions. More...

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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.

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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.

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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.

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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>. Reimplemented from TAO_Bindings_Map.

size_t TAO_Persistent_Bindings_Map::current_size (  void    )  [virtual]

Return the size of the underlying hash table. Reimplemented from 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. Reimplemented from 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_table_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). Reimplemented from 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]

Helper: factors common code from <bind> and <rebind>.

size_t TAO_Persistent_Bindings_Map::total_size (  void    )

Return the size of the underlying hash table.

int TAO_Persistent_Bindings_Map::unbind (  const char *    id, const char *    kind )  [virtual]

Remove a binding containing <id> and <kind> from the table. Return 0 on success and -1 on failure. Reimplemented from TAO_Bindings_Map.

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Member Data Documentation

ACE_Allocator* TAO_Persistent_Bindings_Map::allocator_ [protected]

Pointer to the allocator we use to make bindings persistent.

HASH_MAP* TAO_Persistent_Bindings_Map::map_ [protected]

Pointer to the underlying hash map.

CORBA::ORB_var TAO_Persistent_Bindings_Map::orb_ [protected]

Pointer to the orb. We need it to do string/object conversions.

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

• Persistent_Naming_Context.h
• Persistent_Naming_Context.cpp

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