ACE  6.1.2
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ACE_Configuration_Heap Class Reference

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

#include <Configuration.h>

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List of all members.

Public Member Functions

 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, size_t default_map_size=ACE_DEFAULT_CONFIG_SECTION_SIZE)
int open (size_t default_map_size=ACE_DEFAULT_CONFIG_SECTION_SIZE)
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, bool 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 Member Functions

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_Heapoperator= (const ACE_Configuration_Heap &rhs)

Private Attributes

ACE_Allocatorallocator_
SECTION_MAPindex_
size_t 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 configuration 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

Default ctor.

Destructor.


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:
keySection key to iterate through.
indexIteration position. Must be zero on the first call to iterate through key. Increment index by one on each successive call to this method.
nameReceives 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:
0for success, name has a valid name.
1there are no more subsections in the section.
-1for 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:
keySection key to iterate through.
indexIteration position. Must be zero on the first call to iterate through key. Increment index by one on each successive call to this method.
nameReceives the value's name.
typeReceives 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:
0for success, name and type are valid.
1there are no more values in the section.
-1for 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:
keyConfiguration section to look up the name in.
nameName of the configuration value to get the type of.
typeReceives the data type of the named value, if it exists.
Return values:
0for success.
-1for 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:
keyConfiguration section to get the value from.
nameName of the configuration value to get.
dataReceives 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[].
lengthReceives the number of bytes in the value.
Return values:
0for success; caller is responsible for freeing the returned memory.
-1for 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:
keyConfiguration section to get the value from.
nameName of the configuration value to get.
valueReceives the configuration value if it exists and has type INTEGER.
Return values:
0for success.
-1for 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:
keyConfiguration section to get the value from.
nameName of the configuration value to get.
valueReceives the configuration value if it exists and has type STRING.
Return values:
0for success.
-1for error; ACE_OS::last_error() retrieves error code.

Implements ACE_Configuration.

int ACE_Configuration_Heap::new_section ( const ACE_TString section,
ACE_Configuration_Section_Key result 
)
private
int ACE_Configuration_Heap::open ( const ACE_TCHAR file_name,
void *  base_address = ACE_DEFAULT_BASE_ADDR,
size_t  default_map_size = ACE_DEFAULT_CONFIG_SECTION_SIZE 
)

Opens a configuration that allocates its memory from a memory-mapped file. This makes it possible to persist a configuration to permanent storage. This is not the same as exporting the configuration to a file; the memory-mapped file is not likely to be very readable by humans.

Parameters:
file_nameName of the file to map into memory.
base_addressAddress to map the base of file_name to.
default_map_sizeStarting size for the internal hash tables that contain configuration information.
Return values:
0for success.
-1for error, with errno set to indicate the cause. If open() is called multiple times, errno will be EBUSY.

Opens a configuration that allocates memory from the heap.

Parameters:
default_map_sizeStarting size for the internal hash tables that contain configuration information.
Return values:
0for success.
-1for error, with errno set to indicate the cause. If open() is called multiple times, errno will be EBUSY.
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:
baseExisting section in which to open the named section.
sub_sectionName of the section to open.
createIf zero, the named section must exist. If non-zero, the named section will be created if it does not exist.
resultReference; receives the section key for the new section.
Return values:
0for success.
-1for 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,
bool  recursive 
)
virtual

Removes a named section.

Parameters:
keySection key to remove the named section from.
sub_sectionName of the section to remove.
recursiveIf true, any subkeys below sub_section are removed as well.
Return values:
0for success.
-1for 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:
keyConfiguration section to set the value in.
nameName of the configuration value to set. If a value with the specified name exists, it is replaced.
dataPointer to the binary data for the value.
lengthNumber of bytes for the new value.
Return values:
0for success.
-1for 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:
keyConfiguration section to set the value in.
nameName of the configuration value to set. If a value with the specified name exists, it is replaced.
valueThe integer to set the configuration value to.
Return values:
0for success.
-1for 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:
keyConfiguration section to set the value in.
nameName of the configuration value to set. If a value with the specified name exists, it is replaced.
valueThe string to set the configuration value to.
Return values:
0for success.
-1for 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


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