TAO_Storable_Naming_Context Class Reference

This class plays a role of a 'ConcreteImplementor' in the Bridge pattern architecture of the CosNaming::NamingContext implementation. More...

#include <Storable_Naming_Context.h>

Inheritance diagram for TAO_Storable_Naming_Context:

Collaboration diagram for TAO_Storable_Naming_Context:

List of all members.

Classes
class	File_Open_Lock_and_Check
	Helper class for the TAO_Storable_Naming_Context. More...
Public Types
typedef TAO_Storable_Bindings_Map::HASH_MAP	HASH_MAP
	Underlying data structure - typedef for ease of use.
Public Member Functions
	TAO_Storable_Naming_Context (CORBA::ORB_ptr orb, PortableServer::POA_ptr poa, const char *poa_id, TAO_Naming_Service_Persistence_Factory *factory, const ACE_TCHAR *persistence_directory, size_t hash_table_size=ACE_DEFAULT_MAP_SIZE)
	Constructor.
virtual	~TAO_Storable_Naming_Context (void)
	Destructor.
virtual CosNaming::NamingContext_ptr	new_context (void)
virtual void	list (CORBA::ULong how_many, CosNaming::BindingList_out &bl, CosNaming::BindingIterator_out &bi)
virtual void	rebind (const CosNaming::Name &n, CORBA::Object_ptr obj)
virtual void	bind (const CosNaming::Name &n, CORBA::Object_ptr obj)
virtual void	bind_context (const CosNaming::Name &n, CosNaming::NamingContext_ptr nc)
virtual void	rebind_context (const CosNaming::Name &n, CosNaming::NamingContext_ptr nc)
virtual CORBA::Object_ptr	resolve (const CosNaming::Name &n)
virtual void	unbind (const CosNaming::Name &n)
virtual CosNaming::NamingContext_ptr	bind_new_context (const CosNaming::Name &n)
virtual void	destroy (void)
Static Public Member Functions
static CosNaming::NamingContext_ptr	make_new_context (CORBA::ORB_ptr orb, PortableServer::POA_ptr poa, const char *poa_id, size_t context_size, TAO_Naming_Service_Persistence_Factory *factory, const ACE_TCHAR *persistence_directory, TAO_Storable_Naming_Context **new_context)
static CosNaming::NamingContext_ptr	recreate_all (CORBA::ORB_ptr orb, PortableServer::POA_ptr poa, const char *poa_id, size_t context_size, int reentering, TAO_Naming_Service_Persistence_Factory *factory, const ACE_TCHAR *persistence_directory, int use_redundancy)
Protected Member Functions
int	load_map (File_Open_Lock_and_Check *flck)
void	Write (TAO_Storable_Base &wrtr)
Protected Attributes
ACE_UINT32	counter_
	Counter used for generation of transients.
TAO_Storable_Bindings_Map *	storable_context_
CORBA::ORB_var	orb_
ACE_CString	name_
PortableServer::POA_var	poa_
	POA we are registered with.
TAO_Naming_Service_Persistence_Factory *	factory_
ACE_CString	persistence_directory_
	The directory in which to store the files.
size_t	hash_table_size_
	Save the hash table initial size.
time_t	last_changed_
	Disk time that match current memory state.
Static Protected Attributes
static ACE_UINT32	gcounter_
static int	redundant_
	Flag to tell use whether we are redundant or not.
static const char *	root_name_
static ACE_Auto_Ptr < TAO_Storable_Base >	gfl_
	The pointer to the global file used to allocate new contexts.
Friends
class	File_Open_Lock_and_Check

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Detailed Description

This class plays a role of a 'ConcreteImplementor' in the Bridge pattern architecture of the CosNaming::NamingContext implementation.

This class provides a implementation of the NamingContext functionality, i.e., the state can be preserved across process boundaries. Derives from TAO_Hash_Naming_Context and uses TAO_Storable_Bindings_Map to store name to object bindings.

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Member Typedef Documentation

typedef TAO_Storable_Bindings_Map::HASH_MAP TAO_Storable_Naming_Context::HASH_MAP

Underlying data structure - typedef for ease of use.

---

Constructor & Destructor Documentation

TAO_Storable_Naming_Context::TAO_Storable_Naming_Context	(	CORBA::ORB_ptr	orb,
		PortableServer::POA_ptr	poa,
		const char *	poa_id,
		TAO_Naming_Service_Persistence_Factory *	factory,
		const ACE_TCHAR *	persistence_directory,
		size_t	hash_table_size = ACE_DEFAULT_MAP_SIZE
	)

Constructor.

TAO_Storable_Naming_Context::~TAO_Storable_Naming_Context

(

void

)

[virtual]

Destructor.

---

Member Function Documentation

void TAO_Storable_Naming_Context::bind	(	const CosNaming::Name &	n,
		CORBA::Object_ptr	obj
	)		[virtual]

Create a binding for name <n> and object <obj> in the naming context. Compound names are treated as follows: ctx->bind (<c1; c2; c3; cn>, obj) = (ctx->resolve (<c1; c2; cn-1>))->bind (<cn>, obj) if the there already exists a binding for the specified name, <AlreadyBound> exception is thrown. Naming contexts should be bound using <bind_context> and <rebind_context> in order to participate in name resolution later.

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::bind_context	(	const CosNaming::Name &	n,
		CosNaming::NamingContext_ptr	nc
	)		[virtual]

This is the version of <bind> specifically for binding naming contexts, so that they will participate in name resolution when compound names are passed to be resolved.

Reimplemented from TAO_Hash_Naming_Context.

CosNaming::NamingContext_ptr TAO_Storable_Naming_Context::bind_new_context

(

const CosNaming::Name &

n

)

[virtual]

This operation creates a new context and binds it to the name supplied as an argument. The newly-created context is implemented by the same server as the context in which it was bound (the name argument excluding the last component).

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::destroy

(

void

)

[virtual]

Delete the naming context. The user should take care to <unbind> any bindings in which the given context is bound to some names, to avoid dangling references when invoking <destroy> operation. NOTE: <destory> is a no-op on the root context. NOTE: after <destroy> is invoked on a Naming Context, all BindingIterators associated with that Naming Context are also destroyed.

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::list	(	CORBA::ULong	how_many,
		CosNaming::BindingList_out &	bl,
		CosNaming::BindingIterator_out &	bi
	)		[virtual]

Returns at most the requested number of bindings <how_many> in <bl>. If the naming context contains additional bindings, they are returned with a BindingIterator. In the naming context does not contain any additional bindings <bi> returned as null.

Implements TAO_Naming_Context_Impl.

int TAO_Storable_Naming_Context::load_map

(

File_Open_Lock_and_Check *

flck

)

[protected]

CosNaming::NamingContext_ptr TAO_Storable_Naming_Context::make_new_context	(	CORBA::ORB_ptr	orb,
		PortableServer::POA_ptr	poa,
		const char *	poa_id,
		size_t	context_size,
		TAO_Naming_Service_Persistence_Factory *	factory,
		const ACE_TCHAR *	persistence_directory,
		TAO_Storable_Naming_Context **	new_context
	)		[static]

This utility method factors out the code needed to create a new Storable Naming Context servant and activate it under the specified POA with the specified id. This function is static so that the code can be used, both from inside the class (e.g., <new_context>), and from outside (e.g., Naming_Utils.cpp).

CosNaming::NamingContext_ptr TAO_Storable_Naming_Context::new_context

(

void

)

[virtual]

This operation returns a new naming context implemented by the same naming server in which the operation was invoked. The context is not bound.

Implements TAO_Naming_Context_Impl.

void TAO_Storable_Naming_Context::rebind	(	const CosNaming::Name &	n,
		CORBA::Object_ptr	obj
	)		[virtual]

This is similar to <bind> operation above, except for when the binding for the specified name already exists in the specified context. In that case, the existing binding is replaced with the new one.

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::rebind_context	(	const CosNaming::Name &	n,
		CosNaming::NamingContext_ptr	nc
	)		[virtual]

This is a version of <rebind> specifically for naming contexts, so that they can participate in name resolution when compound names are passed.

Reimplemented from TAO_Hash_Naming_Context.

CosNaming::NamingContext_ptr TAO_Storable_Naming_Context::recreate_all	(	CORBA::ORB_ptr	orb,
		PortableServer::POA_ptr	poa,
		const char *	poa_id,
		size_t	context_size,
		int	reentering,
		TAO_Naming_Service_Persistence_Factory *	factory,
		const ACE_TCHAR *	persistence_directory,
		int	use_redundancy
	)		[static]

CORBA::Object_ptr TAO_Storable_Naming_Context::resolve

(

const CosNaming::Name &

n

)

[virtual]

Return object reference that is bound to the name. Compound name resolve is defined as follows: ctx->resolve (<c1; c2; cn>) = ctx->resolve (<c1; c2 cn-1>)->resolve (<cn>) The naming service does not return the type of the object. Clients are responsible for "narrowing" the object to the appropriate type.

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::unbind

(

const CosNaming::Name &

n

)

[virtual]

Remove the name binding from the context. When compound names are used, unbind is defined as follows: ctx->unbind (<c1; c2; cn>) = (ctx->resolve (<c1; c2; cn-1>))->unbind (<cn>)

Reimplemented from TAO_Hash_Naming_Context.

void TAO_Storable_Naming_Context::Write

(

TAO_Storable_Base &

wrtr

)

[protected]

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Friends And Related Function Documentation

friend class File_Open_Lock_and_Check [friend]

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Member Data Documentation

ACE_UINT32 TAO_Storable_Naming_Context::counter_ [protected]

Counter used for generation of transients.

TAO_Naming_Service_Persistence_Factory* TAO_Storable_Naming_Context::factory_ [protected]

ACE_UINT32 TAO_Storable_Naming_Context::gcounter_ [static, protected]

Global counter used for generation of POA ids for children Naming Contexts.

ACE_Auto_Ptr< TAO_Storable_Base > TAO_Storable_Naming_Context::gfl_ [static, protected]

The pointer to the global file used to allocate new contexts.

size_t TAO_Storable_Naming_Context::hash_table_size_ [protected]

Save the hash table initial size.

time_t TAO_Storable_Naming_Context::last_changed_ [protected]

Disk time that match current memory state.

ACE_CString TAO_Storable_Naming_Context::name_ [protected]

CORBA::ORB_var TAO_Storable_Naming_Context::orb_ [protected]

ACE_CString TAO_Storable_Naming_Context::persistence_directory_ [protected]

The directory in which to store the files.

PortableServer::POA_var TAO_Storable_Naming_Context::poa_ [protected]

POA we are registered with.

Reimplemented from TAO_Hash_Naming_Context.

int TAO_Storable_Naming_Context::redundant_ [static, protected]

Flag to tell use whether we are redundant or not.

const char * TAO_Storable_Naming_Context::root_name_ [static, protected]

TAO_Storable_Bindings_Map* TAO_Storable_Naming_Context::storable_context_ [protected]

A pointer to the underlying data structure used to store name bindings. While our superclass (TAO_Hash_Naming_Context) also maintains a pointer to the data structure, keeping this pointer around saves us from the need to downcast when invoking non-virtual methods.

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

• Storable_Naming_Context.h
• Storable_Naming_Context.cpp