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ACE_Configuration_Heap Class Reference

The concrete implementation of a allocator based configuration database. More...

#include <Configuration.h>

Inheritance diagram for ACE_Configuration_Heap:

[legend]Collaboration diagram for ACE_Configuration_Heap:

[legend]List of all members.


Public Methods
	ACE_Configuration_Heap (void)
	Default ctor.
virtual	~ACE_Configuration_Heap (void)
	Destructor.
int	open (const ACE_TCHAR file_name, void base_address=ACE_DEFAULT_BASE_ADDR, int default_map_size=ACE_DEFAULT_CONFIG_SECTION_SIZE)
	Opens a configuration based on a file name.
int	open (int default_map_size=ACE_DEFAULT_CONFIG_SECTION_SIZE)
	Opens a heap based configuration.
virtual int	open_section (const ACE_Configuration_Section_Key &base, const ACE_TCHAR *sub_section, int create, ACE_Configuration_Section_Key &result)
virtual int	remove_section (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *sub_section, int recursive)
	Removes a named section.
virtual int	enumerate_values (const ACE_Configuration_Section_Key &key, int index, ACE_TString &name, VALUETYPE &type)
virtual int	enumerate_sections (const ACE_Configuration_Section_Key &key, int index, ACE_TString &name)
virtual int	set_string_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name, const ACE_TString &value)
	Sets a string-typed value.
virtual int	set_integer_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name, u_int value)
	Sets a integer-typed value.
virtual int	set_binary_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR name, const void data, size_t length)
	Sets a binary-typed value.
virtual int	get_string_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name, ACE_TString &value)
	Gets a string-typed value.
virtual int	get_integer_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name, u_int &value)
	Gets an integer-typed value.
virtual int	get_binary_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR name, void &data, size_t &length)
	Gets a binary-typed value.
virtual int	find_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name, VALUETYPE &type)
virtual int	remove_value (const ACE_Configuration_Section_Key &key, const ACE_TCHAR *name)
	Removes the the value <name> from <key>. returns non zero on error.
Private Methods
int	open_simple_section (const ACE_Configuration_Section_Key &base, const ACE_TCHAR *sub_section, int create, ACE_Configuration_Section_Key &result)
	<sub_section> may not contain path separators
int	add_section (const ACE_Configuration_Section_Key &base, const ACE_TCHAR *sub_section, ACE_Configuration_Section_Key &result)
	Adds a new section.
int	create_index (void)
	Helper for the <open> method.
int	create_index_helper (void *buffer)
int	value_open_helper (size_t hash_table_size, void *buffer)
int	section_open_helper (size_t hash_table_size, void *buffer)
int	load_key (const ACE_Configuration_Section_Key &key, ACE_TString &name)
int	new_section (const ACE_TString &section, ACE_Configuration_Section_Key &result)
	ACE_Configuration_Heap (const ACE_Configuration_Heap &rhs)
ACE_Configuration_Heap &	operator= (const ACE_Configuration_Heap &rhs)
Private Attributes
ACE_Allocator *	allocator_
SECTION_MAP *	index_
int	default_map_size_

Detailed Description

The concrete implementation of a allocator based configuration database.

This class uses ACE's Allocators to manage a memory representation of a configuraiton database. A persistent heap may be used to store configurations persistently

Note: Before using this class you must call one of the open methods.

Todo:: -Need to investigate what happens if memory mapped file gets mapped to a location different than it was created with.

Constructor & Destructor Documentation

ACE_Configuration_Heap::ACE_Configuration_Heap ( void )

Default ctor.

ACE_Configuration_Heap::~ACE_Configuration_Heap ( void ) [virtual]

Destructor.

ACE_Configuration_Heap::ACE_Configuration_Heap ( const ACE_Configuration_Heap & rhs ) [private]

Member Function Documentation

int ACE_Configuration_Heap::add_section ( const ACE_Configuration_Section_Key & base,

const ACE_TCHAR * sub_section,

ACE_Configuration_Section_Key & result

) [private]

Adds a new section.

int ACE_Configuration_Heap::create_index ( void ) [private]

Helper for the <open> method.

int ACE_Configuration_Heap::create_index_helper ( void * buffer ) [private]

Helper for create_index() method: places hash table into an allocated space.

int ACE_Configuration_Heap::enumerate_sections ( const ACE_Configuration_Section_Key & key,

int index,

ACE_TString & name

) [virtual]

Enumerates through the subsections in a section.
Parameters:

key Section key to iterate through.

index Iteration position. Must be zero on the first call to iterate through key. Increment index by one on each successive call to this method.

name Receives the subsection's name.

Note:
You may not modify the key section while enumerating. If the section is modified during enumeration, results are undefined; you must restart the enumeration from index 0.
Return values:

0 for success, name has a valid name.

1 there are no more subsections in the section.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::enumerate_values ( const ACE_Configuration_Section_Key & key,

int index,

ACE_TString & name,

VALUETYPE & type

) [virtual]

Enumerates through the values in a section.
Parameters:

key Section key to iterate through.

index Iteration position. Must be zero on the first call to iterate through key. Increment index by one on each successive call to this method.

name Receives the value's name.

type Receives the value's data type.

Note:
You may not delete or add values while enumerating. If the section is modified during enumeration, results are undefined; you must restart the enumeration from index 0.
Return values:

0 for success, name and type are valid.

1 there are no more values in the section.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::find_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

VALUETYPE & type

) [virtual]

Retrieves the type of a named configuration value.
Parameters:

key Configuration section to look up the name in.

name Name of the configuration value to get the type of.

type Receives the data type of the named value, if it exists.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::get_binary_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

void *& data,

size_t & length

) [virtual]

Gets a binary-typed value.

Parameters:

key Configuration section to get the value from.

name Name of the configuration value to get.

data Receives a pointer to memory holding the binary data for the value. This method allocates the memory pointed to using operator new[]. The caller is responsible for freeing the memory using operator delete[].

length Receives the number of bytes in the value.

Return values:

0 for success; caller is responsible for freeing the returned memory.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::get_integer_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

u_int & value

) [virtual]

Gets an integer-typed value.

Parameters:

key Configuration section to get the value from.

name Name of the configuration value to get.

value Receives the configuration value if it exists and has type INTEGER.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::get_string_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

ACE_TString & value

) [virtual]

Gets a string-typed value.

Parameters:

key Configuration section to get the value from.

name Name of the configuration value to get.

value Receives the configuration value if it exists and has type STRING.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::load_key ( const ACE_Configuration_Section_Key & key,

ACE_TString & name

) [private]

int ACE_Configuration_Heap::new_section ( const ACE_TString & section,

ACE_Configuration_Section_Key & result

) [private]

int ACE_Configuration_Heap::open ( int default_map_size = ACE_DEFAULT_CONFIG_SECTION_SIZE )

Opens a heap based configuration.

int ACE_Configuration_Heap::open ( const ACE_TCHAR * file_name,

void * base_address = ACE_DEFAULT_BASE_ADDR,

int default_map_size = ACE_DEFAULT_CONFIG_SECTION_SIZE

)

Opens a configuration based on a file name.

int ACE_Configuration_Heap::open_section ( const ACE_Configuration_Section_Key & base,

const ACE_TCHAR * sub_section,

int create,

ACE_Configuration_Section_Key & result

) [virtual]

Opens a named section in an existing section.
Parameters:

base Existing section in which to open the named section.

sub_section Name of the section to open.

create If zero, the named section must exist. If non-zero, the named section will be created if it does not exist.

result Reference; receives the section key for the new section.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::open_simple_section ( const ACE_Configuration_Section_Key & base,

const ACE_TCHAR * sub_section,

int create,

ACE_Configuration_Section_Key & result

) [private]

<sub_section> may not contain path separators

ACE_Configuration_Heap& ACE_Configuration_Heap::operator= ( const ACE_Configuration_Heap & rhs ) [private]

int ACE_Configuration_Heap::remove_section ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * sub_section,

int recursive

) [virtual]

Removes a named section.

Parameters:

key Section key to remove the named section from.

sub_section Name of the section to remove.

recursive If non zero, any subkeys below sub_section are removed as well.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::remove_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name

) [virtual]

Removes the the value <name> from <key>. returns non zero on error.

Implements ACE_Configuration.

int ACE_Configuration_Heap::section_open_helper ( size_t hash_table_size,

void * buffer

) [private]

int ACE_Configuration_Heap::set_binary_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

const void * data,

size_t length

) [virtual]

Sets a binary-typed value.

Parameters:

key Configuration section to set the value in.

name Name of the configuration value to set. If a value with the specified name exists, it is replaced.

data Pointer to the binary data for the value.

length Number of bytes for the new value.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::set_integer_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

u_int value

) [virtual]

Sets a integer-typed value.

Parameters:

key Configuration section to set the value in.

name Name of the configuration value to set. If a value with the specified name exists, it is replaced.

value The integer to set the configuration value to.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::set_string_value ( const ACE_Configuration_Section_Key & key,

const ACE_TCHAR * name,

const ACE_TString & value

) [virtual]

Sets a string-typed value.

Parameters:

key Configuration section to set the value in.

name Name of the configuration value to set. If a value with the specified name exists, it is replaced.

value The string to set the configuration value to.

Return values:

0 for success.

-1 for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::value_open_helper ( size_t hash_table_size,

void * buffer

) [private]

Member Data Documentation

ACE_Allocator* ACE_Configuration_Heap::allocator_ [private]

int ACE_Configuration_Heap::default_map_size_ [private]

SECTION_MAP* ACE_Configuration_Heap::index_ [private]

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

Generated on Fri Apr 2 16:47:42 2004 for ACE by

1.2.18

ACE_Configuration_Heap Class Reference

Public Methods

Private Methods

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation