114 lines
2.8 KiB
Python
114 lines
2.8 KiB
Python
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import time
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import socket
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import os
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import json
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from threading import Thread, Lock
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from .client_base import ClientBase
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from .internal import *
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"""
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" class LeaseContext
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"""
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class LeaseContext:
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def __init__(self):
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self.id = 0
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self.term = RPC_LEASE_TERM
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def Update(self, id, term):
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self.id = id
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self.term = term
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def Reset(self):
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self.id = 0
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self.term = RPC_LEASE_TERM
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def Valid(self):
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return self.id != 0
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"""
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" class LeaseClient
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"""
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class LeaseClient(ClientBase):
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def __init__(self, name: str):
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self.__name = name + "_lease"
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self.__contextName = socket.gethostname() + "/" + name + "/" + str(os.getpid())
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self.__context = LeaseContext()
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self.__thread = None
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self.__lock = Lock()
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super().__init__(self.__name)
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print("[LeaseClient] lease name:", self.__name, ", context name:", self.__contextName)
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def Init(self):
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self.SetTimeout(1.0)
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self.__thread = Thread(target=self.__ThreadFunc, name=self.__name, daemon=True)
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self.__thread.start()
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def WaitApplied(self):
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while True:
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with self.__lock:
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if self.__context.Valid():
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break
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time.sleep(0.1)
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def GetId(self):
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with self.__lock:
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return self.__context.id
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def Applied(self):
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with self.__lock:
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return self.__context.Valid()
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def __Apply(self):
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parameter = {}
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parameter["name"] = self.__contextName
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p = json.dumps(parameter)
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c, d = self._CallBase(RPC_API_ID_LEASE_APPLY, p)
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if c != 0:
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print("[LeaseClient] apply lease error. code:", c)
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return
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data = json.loads(d)
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id = data["id"]
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term = data["term"]
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print("[LeaseClient] lease applied id:", id, ", term:", term)
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with self.__lock:
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self.__context.Update(id, float(term/1000000))
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def __Renewal(self):
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parameter = {}
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p = json.dumps(parameter)
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c, d = self._CallBase(RPC_API_ID_LEASE_RENEWAL, p, 0, self.__context.id)
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if c != 0:
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print("[LeaseClient] renewal lease error. code:", c)
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if c == RPC_ERR_SERVER_LEASE_NOT_EXIST:
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with self.__lock:
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self.__context.Reset()
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def __GetWaitSec(self):
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waitsec = 0.0
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if self.__context.Valid():
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waitsec = self.__context.term
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if waitsec <= 0:
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waitsec = RPC_LEASE_TERM
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return waitsec * 0.3
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def __ThreadFunc(self):
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while True:
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if self.__context.Valid():
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self.__Renewal()
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else:
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self.__Apply()
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# sleep waitsec
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time.sleep(self.__GetWaitSec())
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