Allow early utilisation of lodel.logger ( #121 )

http://redmine.labocleo.org/issues/121

lodel/logger.py

 #-*- coding: utf-8 -*-
 
+import copy
 import logging, logging.handlers
 import os.path
-from lodel.settings import Settings
 
 # Variables & constants definitions
 default_format = '%(asctime)-15s %(levelname)s %(_pathname)s:%(_lineno)s:%(_funcName)s() : %(message)s'
 SECURITY_LOGLEVEL = 35
 logging.addLevelName(SECURITY_LOGLEVEL, 'SECURITY')
 handlers = dict() # Handlers list (generated from settings)
+##@brief Stores sent messages until module is able to be initialized
+msg_buffer = []
 
 # Fetching default root logger
 logger = logging.getLogger()
 
-# Setting options from Lodel.settings.Settings.logging
+##@brief Module initialisation from settings
+#@return True if inited else False
 def __init_from_settings():
+    try:
+        from lodel.settings import Settings
+    except Exception:
+        return False
+    from lodel.settings.settings import Settings as Lodel2Settings
+    if not Lodel2Settings.started():
+        return False
     # capture warning disabled, because the custom format raises error (unable
     # to give the _ preffixed arguments to logger resulting into a KeyError
     # exception )
     logger.setLevel(logging.DEBUG)
     for name in Settings.logging._fields:
         add_handler(name, getattr(Settings.logging, name))
+    return True
     
 
 ##@brief Add an handler, identified by a name, to a given logger 
         if isinstance(handler, logging.StreamHandler):
             remove_handler(name)
     
-
-# Utility functions
+#####################
+# Utility functions #
+#####################
 
 ##@brief Generic logging function
 # @param lvl int : Log severity
 # @param *args : additional positionnal arguments
 # @param **kwargs : additional named arguments
 def log(lvl, msg, *args, **kwargs):
+    if len(handlers) == 0: #late initialisation
+        if not __init_from_settings():
+            s_kwargs = copy.copy(kwargs)
+            s_kwargs.update({'lvl': lvl, 'msg':msg})
+            msg_buffer.append((s_kwargs, args))
+            return
+        else:
+            for s_kwargs, args in msg_buffer:
+                log(*args, **s_kwargs)
     caller = logger.findCaller() # Opti warning : small overhead
     extra = {
         '_pathname': os.path.abspath(caller[0]),
 def error(msg, *args, **kwargs): log(logging.ERROR, msg, *args, **kwargs)
 def critical(msg, *args, **kwargs): log(logging.CRITICAL, msg, *args, **kwargs)
 
-# Initialisation triggering
-if len(handlers) == 0:
-    __init_from_settings()

lodel/plugin/plugins.py

 
 import plugins
 from .exceptions import *
+from lodel import logger
 
 ## @package lodel.plugins Lodel2 plugins management
 #
         if cls._load_called != []:
             cls._load_called = []
     
-    @classmethod
-    ##@brief Browse directory to get plugin
-    #@param plugin_path 
-    #@return module existing
-    def plugin_discover(self, plugin_path):
-        res = os.listdir(plugin_path) is not None
-        if res:
-            dirname = os.path.dirname(plugin_path)
-            for f in os.listdir(plugin_path):
-                file_name = ''.join(dirname, f)
-                if self.is_plugin_dir(file_name):
-                    return self.is_plugin_dir(file_name)
-                else:
-                    self._discover_plugin(file_name)
-        else:
-            pass
-    
     ##@brief Reccursively walk throught paths to find plugin, then stores
     #found plugin in a file...
     #@return a dict {'path_list': [...], 'plugins': { see @ref _discover }}
     @classmethod
     def discover(cls, paths = None):
+        logger.info("Running plugin discover")
         if paths is None:
             paths = DEFAULT_PLUGINS_PATH_LIST
         tmp_res = []

lodel/settings/settings.py

 import types # for dynamic bindings
 from collections import namedtuple
 
+from lodel import logger
 from lodel.plugin.plugins import Plugin, PluginError
 from lodel.settings.utils import SettingsError, SettingsErrors
 from lodel.settings.validator import SettingValidator, LODEL2_CONF_SPECS
 
     @classmethod
     def started(cls):
-        return cls.instance is not None
+        return cls.instance is not None and cls.instance.__confs is not None
 
     ##@brief An utility method that raises if the singleton is not in a good
     # state