Initial commit

[ta/config-manager.git] / cmframework / src / cmframework / utils / cmalarmhandler.py

diff --git a/cmframework/src/cmframework/utils/cmalarmhandler.py b/cmframework/src/cmframework/utils/cmalarmhandler.py
new file mode 100644 (file)
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+++ b/cmframework/src/cmframework/utils/cmalarmhandler.py
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+# Copyright 2019 Nokia
+
+# 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.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import logging
+from Queue import Queue
+from threading import Thread
+
+from cmframework.server.cmsingleton import CMSingleton
+from cmframework.utils.cmalarmwork import CMAlarmWork
+from cmframework.apis import cmerror
+
+
+class AlarmHandler(Thread, CMSingleton):
+    def __init__(self):
+        super(AlarmHandler, self).__init__()
+
+        self.handler_lib = None
+        self.works = Queue()
+
+        self.daemon = True
+
+    def set_library_impl(self, handler_lib_impl_module, **kw):
+        try:
+            logging.debug('Loading alarmhandler lib from %s', handler_lib_impl_module)
+            # Separate class path and module name
+            parts = handler_lib_impl_module.rsplit('.', 1)
+            module_path = parts[0]
+            class_name = parts[1]
+            logging.debug('Importing %s from %s', class_name, module_path)
+            module = __import__(module_path, fromlist=[module_path])
+            classobj = getattr(module, class_name)
+            logging.debug('Constructing alarm handler lib with args %r', kw)
+            self.handler_lib = classobj(**kw)
+        except ImportError as exp1:
+            raise cmerror.CMError(str(exp1))
+        except Exception as exp2:  # pylint: disable=broad-except
+            raise cmerror.CMError(str(exp2))
+
+    def cancel_alarm_with_dn(self,
+                             alarm_id,
+                             dn,
+                             supplementary_info):
+        logging.debug('AlarmHandler.cancel_alarm_with_dn called')
+
+        alarmwork = CMAlarmWork(CMAlarmWork.OPER_CANCEL, alarm_id, dn, supplementary_info)
+
+        self._add_work(alarmwork)
+
+    def raise_alarm_with_dn(self,
+                            alarm_id,
+                            dn,
+                            supplementary_info):
+        logging.debug('AlarmHandler.raise_alarm_with_dn called')
+
+        alarmwork = CMAlarmWork(CMAlarmWork.OPER_RAISE, alarm_id, dn, supplementary_info)
+
+        self._add_work(alarmwork)
+
+    def _get_work(self):
+        return self.works.get()
+
+    def _add_work(self, work):
+        logging.debug('AlarmHandler._add_work called with %s', work)
+
+        self.works.put(work)
+
+    def run(self):
+        while True:
+            work = self._get_work()
+            if self.handler_lib:
+                logging.debug('Asking handler lib to handle work: %s', work)
+                self.handler_lib.handle_alarm_work(work)
+                logging.debug('Handler lib handled work: %s', work)
+            else:
+                logging.warning('No handler lib set to handle work')