Adds Logger docstrings

pisa/logger.py

@@ -4,7 +4,7 @@ import json
 from pisa import f_logger, c_logger
 
 
-class StructuredMessage(object):
+class _StructuredMessage:
     def __init__(self, message, **kwargs):
         self.message = message
         self.time = time.asctime()
@@ -14,31 +14,70 @@ class StructuredMessage(object):
         return {**self.kwargs, "message": self.message, "time": self.time}
 
 
-class Logger(object):
+class Logger:
+    """
+    The ``Logger`` is the class in charge of logging events into the log file.
+
+    Args:
+        actor (str): the system actor that is logging the event (e.g. ``Watcher``, ``Cryptographer``, ...).
+    """
+
     def __init__(self, actor=None):
         self.actor = actor
 
     def _add_prefix(self, msg):
         return msg if self.actor is None else "[{}] {}".format(self.actor, msg)
 
-    def create_console_message(self, msg, **kwargs):
-        return StructuredMessage(self._add_prefix(msg), actor=self.actor, **kwargs).message
+    def _create_console_message(self, msg, **kwargs):
+        return _StructuredMessage(self._add_prefix(msg), actor=self.actor, **kwargs).message
 
-    def create_file_message(self, msg, **kwargs):
-        return json.dumps(StructuredMessage(msg, actor=self.actor, **kwargs).__str__())
+    def _create_file_message(self, msg, **kwargs):
+        return json.dumps(_StructuredMessage(msg, actor=self.actor, **kwargs).__str__())
 
     def info(self, msg, **kwargs):
-        f_logger.info(self.create_file_message(msg, **kwargs))
-        c_logger.info(self.create_console_message(msg, **kwargs))
+        """
+        Logs an ``INFO`` level message to stdout and file.
+
+        Args:
+             msg (str): the message to be logged.
+             kwargs: a ``key:value`` collection parameters to be added to the output.
+        """
+
+        f_logger.info(self._create_file_message(msg, **kwargs))
+        c_logger.info(self._create_console_message(msg, **kwargs))
 
     def debug(self, msg, **kwargs):
-        f_logger.debug(self.create_file_message(msg, **kwargs))
-        c_logger.debug(self.create_console_message(msg, **kwargs))
+        """
+        Logs an ``DEBUG`` level message to stdout and file.
+
+        Args:
+             msg (str): the message to be logged.
+             kwargs: a ``key:value`` collection parameters to be added to the output.
+        """
+
+        f_logger.debug(self._create_file_message(msg, **kwargs))
+        c_logger.debug(self._create_console_message(msg, **kwargs))
 
     def error(self, msg, **kwargs):
-        f_logger.error(self.create_file_message(msg, **kwargs))
-        c_logger.error(self.create_console_message(msg, **kwargs))
+        """
+        Logs an ``ERROR`` level message to stdout and file.
+
+        Args:
+             msg (str): the message to be logged.
+             kwargs: a ``key:value`` collection parameters to be added to the output.
+        """
+
+        f_logger.error(self._create_file_message(msg, **kwargs))
+        c_logger.error(self._create_console_message(msg, **kwargs))
 
     def warning(self, msg, **kwargs):
-        f_logger.warning(self.create_file_message(msg, **kwargs))
-        c_logger.warning(self.create_console_message(msg, **kwargs))
+        """
+        Logs an ``WARNING`` level message to stdout and file.
+
+        Args:
+             msg (str): the message to be logged.
+             kwargs: a ``key:value`` collection parameters to be added to the output.
+        """
+
+        f_logger.warning(self._create_file_message(msg, **kwargs))
+        c_logger.warning(self._create_console_message(msg, **kwargs))