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authorAvdhut Kholkar <avdhut.kholkar@amdocs.com>2018-03-12 04:50:39 +0000
committerGerrit Code Review <gerrit@onap.org>2018-03-12 04:50:39 +0000
commita73cc9030d26f37224ca7bca72469625605d4634 (patch)
treecbf14a1e4628fcbb5d36aaa5cfd808ca1c1cf05a /pylog/onaplogging/logWatchDog.py
parent9ffcefcbbb6ad6b8ba485a402ccc3e469285ec4b (diff)
parent15fc9df448221c4d24fe4c097fe5e00b4512f083 (diff)
Merge " Submit python logging library seed code"
Diffstat (limited to 'pylog/onaplogging/logWatchDog.py')
-rw-r--r--pylog/onaplogging/logWatchDog.py95
1 files changed, 95 insertions, 0 deletions
diff --git a/pylog/onaplogging/logWatchDog.py b/pylog/onaplogging/logWatchDog.py
new file mode 100644
index 0000000..e0673e3
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+++ b/pylog/onaplogging/logWatchDog.py
@@ -0,0 +1,95 @@
+# Copyright (c) 2018 VMware, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+
+import os
+import yaml
+import traceback
+from logging import config
+from watchdog.observers import Observer
+from watchdog.events import FileSystemEventHandler
+
+
+__all__ = ['patch_loggingYaml']
+
+
+def _yaml2Dict(filename):
+
+ with open(filename, 'rt') as f:
+ return yaml.load(f.read())
+
+
+class FileEventHandlers(FileSystemEventHandler):
+
+ def __init__(self, filepath):
+
+ FileSystemEventHandler.__init__(self)
+ self.filepath = filepath
+ self.currentConfig = None
+
+ def on_modified(self, event):
+ try:
+ if event.src_path == self.filepath:
+ newConfig = _yaml2Dict(self.filepath)
+ print ("reload logging configure file %s" % event.src_path)
+ config.dictConfig(newConfig)
+ self.currentConfig = newConfig
+
+ except Exception as e:
+ traceback.print_exc(e)
+ print ("Reuse the old configuration to avoid this "
+ "exception terminate program")
+ if self.currentConfig:
+ config.dictConfig(self.currentConfig)
+
+
+def _yamlConfig(filepath=None, watchDog=None):
+
+ """
+ load logging configureation from yaml file and monitor file status
+
+ :param filepath: logging yaml configure file absolute path
+ :param watchDog: monitor yaml file identifier status
+ :return:
+ """
+ if os.path.isfile(filepath) is False:
+ raise OSError("wrong file")
+
+ dirpath = os.path.dirname(filepath)
+ event_handler = None
+
+ try:
+ dictConfig = _yaml2Dict(filepath)
+ # The watchdog could monitor yaml file status,if be modified
+ # will send a notify then we could reload logging configuration
+ if watchDog:
+ observer = Observer()
+ event_handler = FileEventHandlers(filepath)
+ observer.schedule(event_handler=event_handler, path=dirpath,
+ recursive=False)
+ observer.setDaemon(True)
+ observer.start()
+
+ config.dictConfig(dictConfig)
+
+ if event_handler:
+ # here we keep the correct configuration for reusing
+ event_handler.currentConfig = dictConfig
+
+ except Exception as e:
+ traceback.print_exc(e)
+
+
+def patch_loggingYaml():
+
+ # The patch to add yam config forlogginf and runtime
+ # reload logging when modify yaml file
+ config.yamlConfig = _yamlConfig