DGD::multifile_log Class Reference

#include <dgMultifileLog.h>

Inheritance diagram for DGD::multifile_log:

Public Member Functions

• multifile_log (const char *name, Split_criteria *criteria=&split_by_size)

  DGD::multifile_log constructor.
  
  

• ~multifile_log ()

  multifile_log destructor.
  
  

Static Public Attributes

• Dont_split dont_split

  Instance of default Dont_split predicate.
  
  

• Split_by_size split_by_size

  Instance of default Split_by_size predicate.
  
  

• Split_by_lines split_by_lines

  Instance of default Split_by_size predicate.
  
  

Private Member Functions

• void operator() (unsigned long line, unsigned long column, unsigned long bytes)

  This method overloads funnelbuf::Callback::operator() for tracking the actual size of the output information.
  
  

• std::string real_name () const

  Calculate a current log file name.
  
  

Private Attributes

• std::ofstream m_file
• std::string m_name
• unsigned int m_part_count
• Split_criteria * m_split

Detailed Description

DGD::multifile_log keeps internal std::ofstream object, it also keeps track of amount of information passed to the file. Upon certain condition, the current file is closed and a new file opened and all output of the funnel goes to the new file.

There are a different criteria for splitting the log file. DGD::multifile_log implements three of them:

• No Splitting.
• Split by amount of lines
• Split by amount of bytes All the criteria are implemented by Dont_split, Split_by_size and Split_by_lines classes. All of the classes are derived from Split_criteria class. multifile_log::Split_criteria class is an abstract class providing the simple mechanism for adding new split criteria. Use second parameter for multifile_log() constructor to set the preferable criteria. By default split-by-size is used with size set to 5M.

Constructor & Destructor Documentation

DGD::multifile_log::multifile_log (  const char *  name, Split_criteria *  criteria = &split_by_size )

DGD::multifile_log constructor. Parameters: name  base name of the log file. criteria  a pointer to criteria object. The class of the object must be derived from Split_criteria class. See also: multifile_log::real_name()

DGD::multifile_log::~multifile_log (   )

multifile_log destructor. Flushes and closes the log file.

Member Function Documentation

void DGD::multifile_log::operator() (  unsigned long  line, unsigned long  column, unsigned long  bytes )  [private, virtual]

This method overloads funnelbuf::Callback::operator() for tracking the actual size of the output information. See also: funnelbuf::Callback Reimplemented from DGD::funnel.

std::string DGD::multifile_log::real_name (   )  const [private]

Calculate a current log file name. This method takes the base name given as a parameter to the constructor, the current part number and returns a file name of the current log file. The base name must be a string in form "prefix[.extension]", for example "debug.log" or "logfile". All file parts will be named "prefix#[.extension]" when # is a part number, for example for base name "debug.log" parts will be named "debug0.log", "debug1.log", etc... If the name has a number of '.' chars only the last one will be treated as extension beginning.

Member Data Documentation

multifile_log::Dont_split DGD::multifile_log::dont_split [static]

Instance of default Dont_split predicate.

multifile_log::Split_by_size DGD::multifile_log::split_by_size [static]

Instance of default Split_by_size predicate.

multifile_log::Split_by_lines DGD::multifile_log::split_by_lines [static]

Instance of default Split_by_size predicate.

std::ofstream DGD::multifile_log::m_file [private]

std::string DGD::multifile_log::m_name [private]

unsigned int DGD::multifile_log::m_part_count [private]

Split_criteria* DGD::multifile_log::m_split [private]

• dgMultifileLog.h
• dgMultifileLog.cpp

Generated on Thu Aug 10 16:48:31 2006 for DGD Library by 1.3