Source Code for Module concurrent_tree_crawler.common.logger

 1  import logging 
 2  import sys 
 3   
 4 -class Logger: 
 5          __default_root_log_level = logging.WARNING 
 6          __console_h = None 
 7          __file_h = None 
 8   
 9          @staticmethod 
10 -        def start(stream = sys.stderr, file_path = None,  
11                  logging_level = logging.WARNING, 
12                  format_ = '%(asctime)s %(levelname)s %(message)s'): 
13                  """@param stream: output stream where logs are written. If C{None},  
14                          logs are not written to any stream. 
15                          @param file_path: if it is not C{None}, logging messages are written 
16                          not only to the stream, but to the specified file as well. 
17                          @param logging_level: logging level accepted by logging devices""" 
18                  ## Not used version with non-default formatting 
19                  #datefmt = "%Y-%m-%d %H:%M:%S" 
20                  #formatter = logging.Formatter(format), datefmt) 
21                   
22                  formatter = logging.Formatter(format_) 
23                   
24                  root_logger = logging.getLogger("") 
25                  root_logger.setLevel(logging_level) 
26                   
27                   
28                  if stream is not None: 
29                          Logger.__console_h = logging.StreamHandler(stream) 
30                          Logger.__console_h.setLevel(logging_level) 
31                          Logger.__console_h.setFormatter(formatter) 
32                          root_logger.addHandler(Logger.__console_h) 
33                  if file_path is not None: 
34                          Logger.__file_h = logging.FileHandler(file_path) 
35                          Logger.__file_h.setLevel(logging_level) 
36                          Logger.__file_h.setFormatter(formatter) 
37                          root_logger.addHandler(Logger.__file_h) 
38                           
39          @staticmethod 
40 -        def stop(): 
41                  """Set the default values in the logging system""" 
42                  root_logger = logging.getLogger() 
43                  if Logger.__console_h is not None: 
44                          root_logger.removeHandler(Logger.__console_h) 
45                          Logger.__console_h.close() 
46                  if Logger.__file_h is not None: 
47                          root_logger.removeHandler(Logger.__file_h) 
48                          Logger.__file_h.close() 
49                  root_logger.setLevel(Logger.__default_root_log_level) 
50