166 lines
4.8 KiB
Python
166 lines
4.8 KiB
Python
try:
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import oslo_messaging
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except ImportError:
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import oslo.messaging as oslo_messaging
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from synergy.common import context as ctx
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from synergy.common import log as logging
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from synergy.common import utils
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__author__ = "Lisa Zangrando"
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__email__ = "lisa.zangrando[AT]pd.infn.it"
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__copyright__ = """Copyright (c) 2015 INFN - INDIGO-DataCloud
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All Rights Reserved
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Licensed under the Apache License, Version 2.0;
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you may not use this file except in compliance with the
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License. You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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either express or implied.
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See the License for the specific language governing
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permissions and limitations under the License."""
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LOG = logging.getLogger(__name__)
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class SynergyObject(object):
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"""Base class and object factory.
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This forms the base of all objects that can be remoted or instantiated
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via RPC. Simply defining a class that inherits from this base class
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will make it remotely instantiatable. Objects should implement the
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necessary "get" classmethod routines as well as "set" object methods
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as appropriate.
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"""
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VERSION = "1.0"
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def __init__(self, name=None):
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self.attributes = {}
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if name:
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self.attributes["name"] = name
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def getName(self):
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return self.attributes["name"]
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def setName(self, name):
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self.attributes["name"] = name
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def get(self, field=None):
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return self.attributes.get(field, None)
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def set(self, field, value):
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self.attributes[field] = value
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def setContext(self, context):
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self.context = context
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def setAttributes(self, attributes):
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if attributes:
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self.attributes = attributes
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@classmethod
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def deserialize(cls, context, entity):
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if "synergy_object.namespace" not in entity:
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raise Exception("synergy_object.namespace nof defined!")
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if "synergy_object.name" not in entity:
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raise Exception("synergy_object.name nof defined!")
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if "synergy_object.version" not in entity:
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raise Exception("synergy_object.version nof defined!")
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if entity["synergy_object.namespace"] != 'synergy':
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raise Exception("unsupported object objtype='%s.%s"
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% (entity["synergy_object.namespace"],
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entity["synergy_object.name"]))
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objName = entity['synergy_object.name']
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# objVer = entity['synergy_object.version']
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objClass = utils.import_class(objName)
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# objInstance = objClass(context=context, data=entity)
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objInstance = objClass(name=None)
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objInstance.setContext(context)
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objInstance.setAttributes(entity)
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return objInstance
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def serialize(self):
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name = self.__class__.__module__ + "." + self.__class__.__name__
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self.attributes['synergy_object.name'] = name
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self.attributes['synergy_object.version'] = self.VERSION
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self.attributes['synergy_object.namespace'] = 'synergy'
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return self.attributes
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def log(self):
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for key, value in self.attributes.items():
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LOG.info("%s = %s" % (key, value))
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class SynergySerializer(oslo_messaging.Serializer):
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def __init__(self):
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super(oslo_messaging.Serializer, self).__init__()
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def serialize_entity(self, context, entity):
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if not entity:
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return entity
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if isinstance(entity, SynergyObject):
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entity = entity.serialize()
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elif isinstance(entity, dict):
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result = {}
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for key, value in entity.items():
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result[key] = self.serialize_entity(context, value)
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entity = result
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return entity
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def deserialize_entity(self, context, entity):
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if isinstance(entity, dict):
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if 'synergy_object.name' in entity:
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entity = SynergyObject.deserialize(context, entity)
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else:
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result = {}
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for key, value in entity.items():
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result[key] = self.deserialize_entity(context, value)
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entity = result
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return entity
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def serialize_context(self, context):
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return context.toDict()
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def deserialize_context(self, context):
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return ctx.RequestContext.fromDict(context)
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class RequestContextSerializer(oslo_messaging.Serializer):
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def __init__(self):
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pass
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def serialize_entity(self, context, entity):
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return entity
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def deserialize_entity(self, context, entity):
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return entity
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def serialize_context(self, context):
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return context.toDict()
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def deserialize_context(self, context):
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return ctx.RequestContext.fromDict(context)
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