Added logging configuration

Author: kingspp

module/config/__init__.py

@@ -0,0 +1,12 @@
+"""
+@created on: 10/03/17,
+@author: Prathyush SP,
+@version: v0.0.1
+
+Description:
+
+Sphinx Documentation Status:
+
+..todo::
+    
+"""

module/config/module_logging.yaml

@@ -0,0 +1,88 @@
+version: 1
+disable_existing_loggers: true
+
+
+filters:
+    info_filter:
+        () : module.logging_config_manager.InfoFilter
+    error_filter:
+        () : module.logging_config_manager.ErrorFilter
+
+formatters:
+    standard:
+        format: "%(asctime)s - %(levelname)s - %(name)s(%(lineno)d) - %(message)s"    
+    error:
+        format: "%(asctime)s - %(levelname)s <PID %(process)d:%(processName)s> %(name)s.%(funcName)s(): %(message)s"
+
+handlers:
+    console:
+        class: logging.StreamHandler
+        level: DEBUG
+        formatter: standard 
+        filters: [info_filter]
+        stream: ext://sys.stdout
+        
+    error_console:
+        class: logging.StreamHandler
+        level: ERROR
+        formatter: error  
+        filters: [error_filter]
+        stream: ext://sys.stderr
+        
+
+    info_file_handler:
+        class: logging.handlers.RotatingFileHandler
+        level: INFO
+        formatter: standard
+        filename: /tmp/info.log
+        maxBytes: 10485760 # 10MB
+        backupCount: 20
+        encoding: utf8
+
+    error_file_handler:
+        class: logging.handlers.RotatingFileHandler
+        level: ERROR
+        formatter: error
+        filename: /tmp/errors.log
+        maxBytes: 10485760 # 10MB
+        backupCount: 20
+        encoding: utf8
+
+    debug_file_handler:
+        class: logging.handlers.RotatingFileHandler
+        level: DEBUG
+        formatter: standard
+        filename: /tmp/debug.log
+        maxBytes: 10485760 # 10MB
+        backupCount: 20
+        encoding: utf8
+
+    critical_file_handler:
+        class: logging.handlers.RotatingFileHandler
+        level: CRITICAL
+        formatter: standard
+        filename: /tmp/critical.log
+        maxBytes: 10485760 # 10MB
+        backupCount: 20
+        encoding: utf8
+
+    warn_file_handler:
+        class: logging.handlers.RotatingFileHandler
+        level: WARN
+        formatter: standard
+        filename: /tmp/warn.log
+        maxBytes: 10485760 # 10MB
+        backupCount: 20
+        encoding: utf8
+
+root:
+    level: NOTSET
+    handlers: [console, error_console]
+    propogate: no
+
+loggers:
+    module:
+        level: INFO
+        handlers: [info_file_handler, error_file_handler, critical_file_handler, debug_file_handler, warn_file_handler]
+        propogate: no
+

module/logging_config_manager.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+"""
+| **@created on:** 09/08/17,
+| **@author:** prathyushsp,
+| **@version:** v0.0.1
+|
+| **Description:**
+| 
+|
+| **Sphinx Documentation Status:** Complete
+|
+..todo::
+    --
+"""
+import logging.config
+import os
+import yaml
+import sys
+
+
+class ErrorFilter(logging.Filter):
+    """
+    | **@author:** Prathyush SP
+    | Error Filter
+    """
+
+    def filter(self, record):
+        """
+        | Filter Method
+        :param record: Record Object
+        :return: Boolean
+        """
+        return record.levelno in [logging.ERROR, logging.CRITICAL]
+
+
+class InfoFilter(logging.Filter):
+    """
+    | **@author:** Prathyush SP
+    | Info Filter
+    """
+
+    def filter(self, record):
+        """
+        | Filter Method
+        :param record: Record Object
+        :return: Boolean
+        """
+        return record.levelno in [logging.INFO, logging.DEBUG, logging.WARN]
+
+
+def setup_logging(default_path='logging.yaml', default_level=logging.INFO, env_key='LOG_CFG'):
+    """
+    | **@author:** Prathyush SP
+    | Logging Setup
+    """
+    path = default_path
+    value = os.getenv(env_key, None)
+    if value:
+        path = value
+    if os.path.exists(path):
+        with open(path, 'rt') as f:
+            try:
+                config = yaml.safe_load(f.read())
+                logging.config.dictConfig(config)
+                # todo: Prathyush SP - Enable when coloredlogs package supports filters (https://github.com/xolox/python-coloredlogs/issues/32)
+                # coloredlogs.install(fmt=config['formatters']['standard']['format'], stream=sys.stdout,
+                #                     level=logging.INFO, logger=logging.getLogger().addFilter(InfoFilter()))
+            except Exception as e:
+                print('Error in Logging Configuration. Using default configs', e)
+                logging.basicConfig(level=default_level, stream=sys.stdout)
+                # todo: Prathyush SP - Enable when coloredlogs package supports filters (https://github.com/xolox/python-coloredlogs/issues/32)
+                # coloredlogs.install(level=default_level, stream=sys.stdout)
+    else:
+        logging.basicConfig(level=default_level, stream=sys.stdout)
+        # todo: Prathyush SP - Enable when coloredlogs package supports filters (https://github.com/xolox/python-coloredlogs/issues/32)
+        # coloredlogs.install(level=default_level, stream=sys.stdout)
+        print('Failed to load configuration file. Using default configs')