VOL-609: OpenOMCI External MIB Database and unit-tests
added OpenOMCI protobuf reference to config persist startup
Change-Id: Ie285b1a030b7ea8bfb6cdb6713100dba3c2f3ccc
diff --git a/voltha/extensions/omci/database/mib_db_ext.py b/voltha/extensions/omci/database/mib_db_ext.py
new file mode 100644
index 0000000..f93f14b
--- /dev/null
+++ b/voltha/extensions/omci/database/mib_db_ext.py
@@ -0,0 +1,818 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# 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.
+#
+from datetime import datetime
+from mib_db_api import *
+from voltha.protos.omci_mib_db_pb2 import MibInstanceData, MibClassData, \
+ MibDeviceData, MibAttributeData
+from voltha.extensions.omci.omci_entities import *
+from scapy.fields import StrField
+
+
+class MibDbExternal(MibDbApi):
+ """
+ A persistent external OpenOMCI MIB Database
+ """
+ CURRENT_VERSION = 1 # VOLTHA v1.3.0 release
+
+ _TIME_FORMAT = '%Y%m%d-%H%M%S.%f'
+
+ # Paths from root proxy
+ MIB_PATH = '/omci_mibs'
+ DEVICE_PATH = MIB_PATH + '/{}' # .format(device_id)
+
+ # Classes, Instances, and Attributes as lists from root proxy
+ CLASSES_PATH = DEVICE_PATH + '/classes' # .format(device_id)
+ INSTANCES_PATH = DEVICE_PATH +'/classes/{}/instances' # .format(device_id, class_id)
+ ATTRIBUTES_PATH = DEVICE_PATH + '/classes/{}/instances/{}/attributes' # .format(device_id, class_id, instance_id)
+
+ # Single Class, Instance, and Attribute as objects from device proxy
+ CLASS_PATH = '/classes/{}' # .format(class_id)
+ INSTANCE_PATH = '/classes/{}/instances/{}' # .format(class_id, instance_id)
+ ATTRIBUTE_PATH = '/classes/{}/instances/{}/attributes/{}' # .format(class_id, instance_id
+ # attribute_name)
+
+ def __init__(self, omci_agent):
+ """
+ Class initializer
+ :param omci_agent: (OpenOMCIAgent) OpenOMCI Agent
+ """
+ super(MibDbExternal, self).__init__(omci_agent)
+ self._core = omci_agent.core
+
+ def start(self):
+ """
+ Start up/restore the database
+ """
+ self.log.debug('start')
+
+ if not self._started:
+ super(MibDbExternal, self).start()
+ root_proxy = self._core.get_proxy('/')
+
+ try:
+ base = root_proxy.get(MibDbExternal.MIB_PATH)
+ self.log.info('db-exists', num_devices=len(base))
+
+ except Exception as e:
+ self.log.exception('start-failure', e=e)
+ raise
+
+ def stop(self):
+ """
+ Start up the database
+ """
+ self.log.debug('stop')
+
+ if self._started:
+ super(MibDbExternal, self).stop()
+ # TODO: Delete this method if nothing else is done except calling the base class
+
+ def _time_to_string(self, time):
+ return time.strftime(MibDbExternal._TIME_FORMAT) if time is not None else ''
+
+ def _string_to_time(self, time):
+ return datetime.strptime(time, MibDbExternal._TIME_FORMAT) if len(time) else None
+
+ def _attribute_to_string(self, device_id, class_id, attr_name, value):
+ """
+ Convert an ME's attribute value to string representation
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) Class ID
+ :param attr_name: (str) Attribute Name (see EntityClasses)
+ :param value: (various) Attribute Value
+
+ :return: (str) String representation of the value
+ :raises KeyError: Device, Class ID, or Attribute does not exist
+ """
+ try:
+ me_map = self._omci_agent.get_device(device_id).me_map
+ entity = me_map[class_id]
+ attr_index = entity.attribute_name_to_index_map[attr_name]
+ eca = entity.attributes[attr_index]
+ field = eca.field
+
+ if isinstance(field, (StrField, MACField, IPField)):
+ # For StrField, value is an str already (or possibly JSON encoded object)
+ # For MACField, value is a string in ':' delimited form
+ # For IPField, value is a string in '.' delimited form
+ if hasattr(value, 'to_json'):
+ str_value = value.to_json()
+ else:
+ str_value = str(value)
+
+ elif isinstance(field, (ByteField, ShortField, IntField, LongField)):
+ # For ByteField, ShortField, IntField, and LongField value is an int
+ str_value = str(value)
+
+ elif isinstance(field, BitField):
+ # For BitField, value is a long
+ #
+ str_value = str(value)
+
+ else:
+ self.log.warning('default-conversion', type=type(field),
+ class_id=class_id, attribute=attr_name, value=str(value))
+ str_value = str(value)
+
+ return str_value
+
+ except Exception as e:
+ self.log.exception('attr-to-string', device_id=device_id,
+ class_id=class_id, attr=attr_name,
+ value=value, e=e)
+ raise
+
+ def _string_to_attribute(self, device_id, class_id, attr_name, str_value):
+ """
+ Convert an ME's attribute value-string to its Scapy decode equivalent
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) Class ID
+ :param attr_name: (str) Attribute Name (see EntityClasses)
+ :param str_value: (str) Attribute Value in string form
+
+ :return: (various) String representation of the value
+ :raises KeyError: Device, Class ID, or Attribute does not exist
+ """
+ try:
+ me_map = self._omci_agent.get_device(device_id).me_map
+ entity = me_map[class_id]
+ attr_index = entity.attribute_name_to_index_map[attr_name]
+ eca = entity.attributes[attr_index]
+ field = eca.field
+
+ if isinstance(field, StrFixedLenField):
+ value = str_value
+
+ elif isinstance(field, MACField):
+ value = str_value
+
+ elif isinstance(field, IPField):
+ value = str_value
+
+ elif isinstance(field, (ByteField, ShortField, IntField, LongField)):
+ value = int(str_value)
+
+ elif isinstance(field, BitField):
+ value = long(str_value)
+
+ else:
+ self.log.warning('default-conversion', type=type(field),
+ class_id=class_id, attribute=attr_name, value=str_value)
+ value = None
+
+ return value
+
+ except Exception as e:
+ self.log.exception('attr-to-string', device_id=device_id,
+ class_id=class_id, attr=attr_name,
+ value=str_value, e=e)
+ raise
+
+ def add(self, device_id, overwrite=False):
+ """
+ Add a new ONU to database
+
+ :param device_id: (str) Device ID of ONU to add
+ :param overwrite: (bool) Overwrite existing entry if found.
+
+ :raises KeyError: If device already exists and 'overwrite' is False
+ """
+ self.log.debug('add-device', device_id=device_id, overwrite=overwrite)
+
+ now = datetime.utcnow()
+ found = False
+ root_proxy = self._core.get_proxy('/')
+ data = MibDeviceData(device_id=device_id,
+ created=self._time_to_string(now),
+ last_sync_time='',
+ mib_data_sync=0,
+ version=MibDbExternal.CURRENT_VERSION)
+ try:
+ dev_proxy = self._device_proxy(device_id)
+ found = True
+
+ if not overwrite:
+ # Device already exists
+ raise KeyError('Device with ID {} already exists in MIB database'.
+ format(device_id))
+
+ # Overwrite with new data
+ data = dev_proxy.get('/', depth=0)
+ self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id), data)
+ self._modified = now
+
+ except KeyError:
+ if found:
+ raise
+ # Did not exist, add it now
+ root_proxy.add(MibDbExternal.MIB_PATH, data)
+ self._created = now
+ self._modified = now
+
+ def remove(self, device_id):
+ """
+ Remove an ONU from the database
+
+ :param device_id: (str) Device ID of ONU to remove from database
+ """
+ self.log.debug('remove-device', device_id=device_id)
+
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ if not isinstance(device_id, basestring):
+ raise TypeError('Device ID should be an string')
+
+ try:
+ # self._root_proxy.get(MibDbExternal.DEVICE_PATH.format(device_id))
+ self._root_proxy.remove(MibDbExternal.DEVICE_PATH.format(device_id))
+ self._modified = datetime.utcnow()
+
+ except KeyError:
+ # Did not exists, which is not a failure
+ pass
+
+ except Exception as e:
+ self.log.exception('remove-exception', device_id=device_id, e=e)
+ raise
+
+ @property
+ def _root_proxy(self):
+ return self._core.get_proxy('/')
+
+ def _device_proxy(self, device_id):
+ """
+ Return a config proxy to the OMCI MIB_DB leaf for a given device
+
+ :param device_id: (str) ONU Device ID
+ :return: (ConfigProxy) Configuration proxy rooted at OMCI MIB DB
+ :raises KeyError: If the device does not exist in the database
+ """
+ if not isinstance(device_id, basestring):
+ raise TypeError('Device ID should be an string')
+
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ return self._core.get_proxy(MibDbExternal.DEVICE_PATH.format(device_id))
+
+ def _class_proxy(self, device_id, class_id, create=False):
+ """
+ Get a config proxy to a specific managed entity class
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) Class ID
+ :param create: (bool) If true, create default instance (and class)
+ :return: (ConfigProxy) Class configuration proxy
+
+ :raises DatabaseStateError: If database is not started
+ :raises KeyError: If Instance does not exist and 'create' is False
+ """
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ if not 0 <= class_id <= 0xFFFF:
+ raise ValueError('class-id is 0..0xFFFF')
+
+ fmt = MibDbExternal.DEVICE_PATH + MibDbExternal.CLASS_PATH
+ path = fmt.format(device_id, class_id)
+
+ try:
+ return self._core.get_proxy(path)
+
+ except KeyError:
+ if not create:
+ self.log.error('class-proxy-does-not-exist', device_id=device_id,
+ class_id=class_id)
+ raise
+
+ # Create class
+ data = MibClassData(class_id=class_id)
+ root_path = MibDbExternal.CLASSES_PATH.format(device_id)
+ self._root_proxy.add(root_path, data)
+
+ return self._core.get_proxy(path)
+
+ def _instance_proxy(self, device_id, class_id, instance_id, create=False):
+ """
+ Get a config proxy to a specific managed entity instance
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) Class ID
+ :param instance_id: (int) Instance ID
+ :param create: (bool) If true, create default instance (and class)
+ :return: (ConfigProxy) Instance configuration proxy
+
+ :raises DatabaseStateError: If database is not started
+ :raises KeyError: If Instance does not exist and 'create' is False
+ """
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ if not isinstance(device_id, basestring):
+ raise TypeError('Device ID is a string')
+
+ if not 0 <= class_id <= 0xFFFF:
+ raise ValueError('class-id is 0..0xFFFF')
+
+ if not 0 <= instance_id <= 0xFFFF:
+ raise ValueError('instance-id is 0..0xFFFF')
+
+ fmt = MibDbExternal.DEVICE_PATH + MibDbExternal.INSTANCE_PATH
+ path = fmt.format(device_id, class_id, instance_id)
+
+ try:
+ return self._core.get_proxy(path)
+
+ except KeyError:
+ if not create:
+ self.log.error('instance-proxy-does-not-exist', device_id=device_id,
+ class_id=class_id, instance_id=instance_id)
+ raise
+
+ # Create instance, first make sure class exists
+ self._class_proxy(device_id, class_id, create=True)
+
+ now = self._time_to_string(datetime.utcnow())
+ data = MibInstanceData(instance_id=instance_id, created=now, modified=now)
+ root_path = MibDbExternal.INSTANCES_PATH.format(device_id, class_id)
+ self._root_proxy.add(root_path, data)
+
+ return self._core.get_proxy(path)
+
+ def on_mib_reset(self, device_id):
+ """
+ Reset/clear the database for a specific Device
+
+ :param device_id: (str) ONU Device ID
+ :raises DatabaseStateError: If the database is not enabled
+ """
+ self.log.debug('on-mib-reset', device_id=device_id)
+
+ try:
+ device_proxy = self._device_proxy(device_id)
+ data = device_proxy.get(depth=2)
+
+ # Wipe out any existing class IDs
+ class_ids = [c.class_id for c in data.classes]
+
+ if len(class_ids):
+ for class_id in class_ids:
+ device_proxy.remove(MibDbExternal.CLASS_PATH.format(class_id))
+
+ # Reset MIB Data Sync to zero
+ now = datetime.utcnow()
+ data = MibDeviceData(device_id=device_id,
+ created=data.created,
+ last_sync_time=data.last_sync_time,
+ mib_data_sync=0,
+ version=MibDbExternal.CURRENT_VERSION)
+ # Update
+ self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+ data)
+ self._modified = now
+ self.log.debug('mib-reset-complete', device_id=device_id)
+
+ except Exception as e:
+ self.log.exception('mib-reset-exception', device_id=device_id, e=e)
+ raise
+
+ def save_mib_data_sync(self, device_id, value):
+ """
+ Save the MIB Data Sync to the database in an easy location to access
+
+ :param device_id: (str) ONU Device ID
+ :param value: (int) Value to save
+ """
+ self.log.debug('save-mds', device_id=device_id, value=value)
+
+ try:
+ if not isinstance(value, int):
+ raise TypeError('MIB Data Sync is an integer')
+
+ if not 0 <= value <= 255:
+ raise ValueError('Invalid MIB-data-sync value {}. Must be 0..255'.
+ format(value))
+ device_proxy = self._device_proxy(device_id)
+ data = device_proxy.get(depth=0)
+
+ now = datetime.utcnow()
+ data.mib_data_sync = value
+
+ # Update
+ self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+ data)
+ self._modified = now
+ self.log.debug('save-mds-complete', device_id=device_id)
+
+ except Exception as e:
+ self.log.exception('save-mds-exception', device_id=device_id, e=e)
+ raise
+
+ def get_mib_data_sync(self, device_id):
+ """
+ Get the MIB Data Sync value last saved to the database for a device
+
+ :param device_id: (str) ONU Device ID
+ :return: (int) The Value or None if not found
+ """
+ self.log.debug('get-mds', device_id=device_id)
+
+ try:
+ device_proxy = self._device_proxy(device_id)
+ data = device_proxy.get(depth=0)
+ return int(data.mib_data_sync)
+
+ except KeyError:
+ return None # OMCI MIB_DB entry has not yet been created
+
+ except Exception as e:
+ self.log.exception('get-mds-exception', device_id=device_id, e=e)
+ raise
+
+ def save_last_sync(self, device_id, value):
+ """
+ Save the Last Sync time to the database in an easy location to access
+
+ :param device_id: (str) ONU Device ID
+ :param value: (DateTime) Value to save
+ """
+ self.log.debug('save-last-sync', device_id=device_id, time=str(value))
+
+ try:
+ if not isinstance(value, datetime):
+ raise TypeError('Expected a datetime object, got {}'.
+ format(type(datetime)))
+
+ device_proxy = self._device_proxy(device_id)
+ data = device_proxy.get(depth=0)
+
+ now = datetime.utcnow()
+ data.last_sync_time = self._time_to_string(value)
+
+ # Update
+ self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+ data)
+ self._modified = now
+ self.log.debug('save-mds-complete', device_id=device_id)
+
+ except Exception as e:
+ self.log.exception('save-last-sync-exception', device_id=device_id, e=e)
+ raise
+
+ def get_last_sync(self, device_id):
+ """
+ Get the Last Sync Time saved to the database for a device
+
+ :param device_id: (str) ONU Device ID
+ :return: (int) The Value or None if not found
+ """
+ self.log.debug('get-last-sync', device_id=device_id)
+
+ try:
+ device_proxy = self._device_proxy(device_id)
+ data = device_proxy.get(depth=0)
+ return self._string_to_time(data.last_sync_time)
+
+ except KeyError:
+ return None # OMCI MIB_DB entry has not yet been created
+
+ except Exception as e:
+ self.log.exception('get-last-sync-exception', e=e)
+ raise
+
+ def _add_new_class(self, device_id, class_id, instance_id, attributes):
+ """
+ Create an entry for a new class in the external database
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) ME Class ID
+ :param instance_id: (int) ME Entity ID
+ :param attributes: (dict) Attribute dictionary
+
+ :returns: (bool) True if the value was saved to the database. False if the
+ value was identical to the current instance
+ """
+ self.log.debug('add', device_id=device_id, class_id=class_id,
+ instance_id=instance_id, attributes=attributes)
+
+ now = self._time_to_string(datetime.utcnow())
+ attrs = [MibAttributeData(name=k,
+ value=self._attribute_to_string(device_id,
+ class_id,
+ k,
+ v)) for k, v in attributes.items()]
+ class_data = MibClassData(class_id=class_id,
+ instances=[MibInstanceData(instance_id=instance_id,
+ created=now,
+ modified=now,
+ attributes=attrs)])
+
+ self._root_proxy.add(MibDbExternal.CLASSES_PATH.format(device_id), class_data)
+ self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+ entity_id=instance_id, attributes=attributes)
+ return True
+
+ def _add_new_instance(self, device_id, class_id, instance_id, attributes):
+ """
+ Create an entry for a instance of an existing class in the external database
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) ME Class ID
+ :param instance_id: (int) ME Entity ID
+ :param attributes: (dict) Attribute dictionary
+
+ :returns: (bool) True if the value was saved to the database. False if the
+ value was identical to the current instance
+ """
+ self.log.debug('add', device_id=device_id, class_id=class_id,
+ instance_id=instance_id, attributes=attributes)
+
+ now = self._time_to_string(datetime.utcnow())
+ attrs = [MibAttributeData(name=k,
+ value=self._attribute_to_string(device_id,
+ class_id,
+ k,
+ v)) for k, v in attributes.items()]
+ instance_data = MibInstanceData(instance_id=instance_id,
+ created=now,
+ modified=now,
+ attributes=attrs)
+
+ self._root_proxy.add(MibDbExternal.INSTANCES_PATH.format(device_id, class_id),
+ instance_data)
+
+ self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+ entity_id=instance_id, attributes=attributes)
+ return True
+
+ def set(self, device_id, class_id, instance_id, attributes):
+ """
+ Set a database value. This should only be called by the MIB synchronizer
+ and its related tasks
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) ME Class ID
+ :param instance_id: (int) ME Entity ID
+ :param attributes: (dict) Attribute dictionary
+
+ :returns: (bool) True if the value was saved to the database. False if the
+ value was identical to the current instance
+
+ :raises KeyError: If device does not exist
+ :raises DatabaseStateError: If the database is not enabled
+ """
+ self.log.debug('set', device_id=device_id, class_id=class_id,
+ instance_id=instance_id, attributes=attributes)
+ try:
+ if not isinstance(device_id, basestring):
+ raise TypeError('Device ID should be a string')
+
+ if not 0 <= class_id <= 0xFFFF:
+ raise ValueError("Invalid Class ID: {}, should be 0..65535".format(class_id))
+
+ if not 0 <= instance_id <= 0xFFFF:
+ raise ValueError("Invalid Instance ID: {}, should be 0..65535".format(instance_id))
+
+ if not isinstance(attributes, dict):
+ raise TypeError("Attributes should be a dictionary")
+
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ # Determine the best strategy to add the information
+ dev_proxy = self._device_proxy(device_id)
+
+ try:
+ class_data = dev_proxy.get(MibDbExternal.CLASS_PATH.format(class_id), deep=True)
+
+ inst_data = next((inst for inst in class_data.instances
+ if inst.instance_id == instance_id), None)
+
+ if inst_data is None:
+ return self._add_new_instance(device_id, class_id, instance_id, attributes)
+
+ # Possibly adding to or updating an existing instance
+ # Get instance proxy, creating it if needed
+
+ exist_attr_indexes = dict()
+ attr_len = len(inst_data.attributes)
+
+ for index in xrange(0, attr_len):
+ exist_attr_indexes[inst_data.attributes[index].name] = index
+
+ modified = False
+ new_attributes = []
+
+ for k, v in attributes.items():
+ str_value = self._attribute_to_string(device_id, class_id, k, v)
+ new_attributes.append(MibAttributeData(name=k, value=str_value))
+
+ if k not in exist_attr_indexes or \
+ inst_data.attributes[exist_attr_indexes[k]].value != str_value:
+ modified = True
+
+ if modified:
+ now = datetime.utcnow()
+ new_data = MibInstanceData(instance_id=instance_id,
+ created=inst_data.created,
+ modified=self._time_to_string(now),
+ attributes=new_attributes)
+ dev_proxy.remove(MibDbExternal.INSTANCE_PATH.format(class_id, instance_id))
+ self._root_proxy.add(MibDbExternal.INSTANCES_PATH.format(device_id,
+ class_id), new_data)
+
+ self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+ entity_id=instance_id, attributes=attributes, modified=modified)
+
+ return modified
+
+ except KeyError:
+ # Here if the class-id does not yet exist in the database
+ return self._add_new_class(device_id, class_id, instance_id,
+ attributes)
+ except Exception as e:
+ self.log.exception('set-exception', device_id=device_id, class_id=class_id,
+ instance_id=instance_id, attributes=attributes, e=e)
+ raise
+
+ def delete(self, device_id, class_id, entity_id):
+ """
+ Delete an entity from the database if it exists. If all instances
+ of a class are deleted, the class is deleted as well.
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) ME Class ID
+ :param entity_id: (int) ME Entity ID
+
+ :returns: (bool) True if the instance was found and deleted. False
+ if it did not exist.
+
+ :raises KeyError: If device does not exist
+ :raises DatabaseStateError: If the database is not enabled
+ """
+ self.log.debug('delete', device_id=device_id, class_id=class_id,
+ entity_id=entity_id)
+
+ if not self._started:
+ raise DatabaseStateError('The Database is not currently active')
+
+ if not isinstance(device_id, basestring):
+ raise TypeError('Device ID should be an string')
+
+ if not 0 <= class_id <= 0xFFFF:
+ raise ValueError('class-id is 0..0xFFFF')
+
+ if not 0 <= entity_id <= 0xFFFF:
+ raise ValueError('instance-id is 0..0xFFFF')
+
+ try:
+ # Remove instance
+ self._instance_proxy(device_id, class_id, entity_id).remove('/')
+ now = datetime.utcnow()
+
+ # If resulting class has no instance, remove it as well
+ class_proxy = self._class_proxy(device_id, class_id)
+ class_data = class_proxy.get('/', depth=1)
+
+ if len(class_data.instances) == 0:
+ class_proxy.remove('/')
+
+ self._modified = now
+ return True
+
+ except KeyError:
+ return False # Not found
+
+ except Exception as e:
+ self.log.exception('get-last-sync-exception', device_id=device_id, e=e)
+ raise
+
+ def query(self, device_id, class_id=None, instance_id=None, attributes=None):
+ """
+ Get database information.
+
+ This method can be used to request information from the database to the detailed
+ level requested
+
+ :param device_id: (str) ONU Device ID
+ :param class_id: (int) Managed Entity class ID
+ :param instance_id: (int) Managed Entity instance
+ :param attributes: (list/set or str) Managed Entity instance's attributes
+
+ :return: (dict) The value(s) requested. If class/inst/attribute is
+ not found, an empty dictionary is returned
+ :raises KeyError: If the requested device does not exist
+ :raises DatabaseStateError: If the database is not enabled
+ """
+ self.log.debug('query', device_id=device_id, class_id=class_id,
+ instance_id=instance_id, attributes=attributes)
+ try:
+ if class_id is None:
+ # Get full device info
+ dev_data = self._device_proxy(device_id).get('/', depth=-1)
+ data = self._device_to_dict(dev_data)
+
+ elif instance_id is None:
+ # Get all instances of the class
+ try:
+ cls_data = self._class_proxy(device_id, class_id).get('/', depth=-1)
+ data = self._class_to_dict(device_id, cls_data)
+
+ except KeyError:
+ data = dict()
+
+ else:
+ # Get all attributes of a specific ME
+ try:
+ inst_data = self._instance_proxy(device_id, class_id, instance_id).\
+ get('/', depth=-1)
+
+ if attributes is None:
+ # All Attributes
+ data = self._instance_to_dict(device_id, class_id, inst_data)
+
+ else:
+ # Specific attribute(s)
+
+ if isinstance(attributes, basestring):
+ attributes = {attributes}
+
+ data = {
+ attr.name: self._string_to_attribute(device_id,
+ class_id,
+ attr.name,
+ attr.value)
+ for attr in inst_data.attributes if attr.name in attributes}
+
+ except KeyError:
+ data = dict()
+
+ return data
+
+ except KeyError:
+ self.log.warn('query-no-device', device_id=device_id)
+ raise
+
+ except Exception as e:
+ self.log.exception('get-last-sync-exception', device_id=device_id, e=e)
+ raise
+
+ def _instance_to_dict(self, device_id, class_id, instance):
+ if not isinstance(instance, MibInstanceData):
+ raise TypeError('{} is not of type MibInstanceData'.format(type(instance)))
+
+ data = {
+ INSTANCE_ID_KEY: instance.instance_id,
+ CREATED_KEY: self._string_to_time(instance.created),
+ MODIFIED_KEY: self._string_to_time(instance.modified),
+ ATTRIBUTES_KEY: dict()
+ }
+ for attribute in instance.attributes:
+ data[ATTRIBUTES_KEY][attribute.name] = self._string_to_attribute(device_id,
+ class_id,
+ attribute.name,
+ attribute.value)
+ return data
+
+ def _class_to_dict(self, device_id, val):
+ if not isinstance(val, MibClassData):
+ raise TypeError('{} is not of type MibClassData'.format(type(val)))
+
+ data = {
+ CLASS_ID_KEY: val.class_id,
+ }
+ for instance in val.instances:
+ data[instance.instance_id] = self._instance_to_dict(device_id,
+ val.class_id,
+ instance)
+ return data
+
+ def _device_to_dict(self, val):
+ if not isinstance(val, MibDeviceData):
+ raise TypeError('{} is not of type MibDeviceData'.format(type(val)))
+
+ data = {
+ DEVICE_ID_KEY: val.device_id,
+ CREATED_KEY: self._string_to_time(val.created),
+ LAST_SYNC_KEY: self._string_to_time(val.last_sync_time),
+ MDS_KEY: val.mib_data_sync,
+ VERSION_KEY: val.version
+ }
+ for class_data in val.classes:
+ data[class_data.class_id] = self._class_to_dict(val.device_id,
+ class_data)
+ return data