uncloud-mravi/ucloud/common/request.py

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import json
from os.path import join
from uuid import uuid4
from .etcd_wrapper import PsuedoEtcdEntry
from .classes import SpecificEtcdEntryBase
class RequestType:
CreateVM = "CreateVM"
ScheduleVM = "ScheduleVM"
StartVM = "StartVM"
StopVM = "StopVM"
InitVMMigration = "InitVMMigration"
TransferVM = "TransferVM"
DeleteVM = "DeleteVM"
class RequestEntry(SpecificEtcdEntryBase):
def __init__(self, e):
self.destination_host_key = None
self.type = None # type: str
self.migration = None # type: bool
self.destination = None # type: str
self.uuid = None # type: str
self.hostname = None # type: str
super().__init__(e)
@classmethod
def from_scratch(cls, request_prefix, **kwargs):
e = PsuedoEtcdEntry(join(request_prefix, uuid4().hex),
value=json.dumps(kwargs).encode("utf-8"), value_in_json=True)
return cls(e)
class RequestPool:
def __init__(self, etcd_client, request_prefix):
self.client = etcd_client
self.prefix = request_prefix
def put(self, obj: RequestEntry):
if not obj.key.startswith(self.prefix):
obj.key = join(self.prefix, obj.key)
self.client.put(obj.key, obj.value, value_in_json=True)