137 lines
4.6 KiB
Matlab
137 lines
4.6 KiB
Matlab
%
|
|
% -----------------
|
|
% Copyright © 2024 ACK Cyfronet AGH, Poland.
|
|
% -----------------
|
|
%
|
|
% BASE_LOGGER A singleton logger class for logging messages to a file.
|
|
%
|
|
% This class implements a simple logging mechanism with different log levels
|
|
% (TRACE, DEBUG, INFO, WARNING, ERROR) and writes log entries to a file.
|
|
% It follows the Singleton pattern to ensure that only one instance of the logger
|
|
% exists throughout the application.
|
|
%
|
|
% The log file is specified by the environment variable 'APP_LOG_FILE'. If
|
|
% the variable is not set, a default file 'base-logger-log.log' is used.
|
|
%
|
|
% Properties:
|
|
% fid - (private) The file identifier for the log file. This is used to write logs.
|
|
%
|
|
% Methods:
|
|
%
|
|
% getInstance() - Retrieves the singleton instance of the logger.
|
|
%
|
|
% trace(varargin) - Logs one or more messages with TRACE level.
|
|
% @param varargin The messages to log. Can be strings, numbers, or MException objects.
|
|
%
|
|
% debug(varargin) - Logs one or more messages with DEBUG level.
|
|
% @param varargin The messages to log. Can be strings, numbers, or MException objects.
|
|
%
|
|
% info(varargin) - Logs one or more messages with INFO level.
|
|
% @param varargin The messages to log. Can be strings, numbers, or MException objects.
|
|
%
|
|
% warning(varargin) - Logs one or more messages with WARNING level.
|
|
% @param varargin The messages to log. Can be strings, numbers, or MException objects.
|
|
%
|
|
% error(varargin) - Logs one or more messages with ERROR level.
|
|
% @param varargin The messages to log. Can be strings, numbers, or MException objects.
|
|
%
|
|
% delete() - Destructor method that closes the file identifier when the logger is deleted.
|
|
%
|
|
% Example Usage:
|
|
% logger = base_logger.getInstance();
|
|
% logger.info('Some info')
|
|
%
|
|
% try
|
|
% % some code causing exception
|
|
% catch err
|
|
% logger.error('An error occurred:', err);
|
|
% end
|
|
%
|
|
% See also: fopen, fclose, dbstack, fprintf
|
|
|
|
classdef base_logger < handle
|
|
properties
|
|
fid;
|
|
end
|
|
|
|
methods(Static)
|
|
function obj = getInstance()
|
|
persistent instance;
|
|
if isempty(instance)
|
|
instance = base_logger();
|
|
end
|
|
obj = instance;
|
|
end
|
|
end
|
|
|
|
methods
|
|
function this = base_logger()
|
|
logFileName = getenv("APP_LOG_FILE");
|
|
if isempty(logFileName)
|
|
logFileName = 'base-logger-log.log';
|
|
end
|
|
this.fid = fopen(logFileName, 'a');
|
|
if this.fid == -1
|
|
error('Failed to open log file');
|
|
end
|
|
end
|
|
|
|
function log(this, level, varargin)
|
|
current_time = strftime('%Y-%m-%d %H:%M:%S', localtime(time()));
|
|
stack = dbstack('-completenames');
|
|
if length(stack) > 2
|
|
script_name = stack(3).name;
|
|
else
|
|
script_name = 'Unknown';
|
|
end
|
|
|
|
message = sprintf('');
|
|
for i = 1:numel(varargin)
|
|
if isstruct(varargin{i}) && isfield(varargin{i}, 'message') && isfield(varargin{i}, 'stack')
|
|
error_info = varargin{i};
|
|
message = sprintf('%sError: %s\n', message, error_info.message);
|
|
for j = 1:length(error_info.stack)
|
|
message = sprintf('%s at %s (line %d)\n', message, error_info.stack(j).name, error_info.stack(j).line);
|
|
end
|
|
elseif isnumeric(varargin{i}) || islogical(varargin{i})
|
|
message = sprintf('%s%s', message, num2str(varargin{i}));
|
|
elseif ischar(varargin{i}) || isstring(varargin{i})
|
|
message = sprintf('%s%s', message, varargin{i});
|
|
else
|
|
message = sprintf('%sUnsupported data type', message);
|
|
end
|
|
if i < numel(varargin)
|
|
message = sprintf('%s, ', message);
|
|
end
|
|
end
|
|
|
|
fprintf(this.fid, '%s %s %s %s\n', current_time, level, script_name, message);
|
|
end
|
|
|
|
function trace(this, varargin)
|
|
this.log('TRACE', varargin{:});
|
|
end
|
|
|
|
function debug(this, varargin)
|
|
this.log('DEBUG', varargin{:});
|
|
end
|
|
|
|
function info(this, varargin)
|
|
this.log('INFO', varargin{:});
|
|
end
|
|
|
|
function warning(this, varargin)
|
|
this.log('WARNING', varargin{:});
|
|
end
|
|
|
|
function error(this, varargin)
|
|
this.log('ERROR', varargin{:});
|
|
end
|
|
|
|
function delete(this)
|
|
if this.fid ~= -1
|
|
fclose(this.fid);
|
|
end
|
|
end
|
|
end
|
|
end |