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210 lines (187 loc) · 7.38 KB
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# encoding: UTF-8
import six
import time
from datetime import datetime
from threading import Thread, Condition, Lock
from quantdigger.util import mlogger as log
from quantdigger.errors import InvalidRPCClientArguments
from quantdigger.event import Event
class EventRPCClient(object):
def __init__(self, name, event_engine, service, event_client=None, event_server=None):
self.EVENT_FROM_CLIENT = event_client if event_client else "EVENT_FROM_%s_CLIENT" % service.upper()
self.EVENT_FROM_SERVER = event_server if event_server else "EVENT_FROM_%s_SERVER" % service.upper()
self.rid = 0
self._handlers = {}
self._name = name
self._handlers_lock = Lock()
self._event_engine = event_engine
self._event_engine.register(self.EVENT_FROM_SERVER, self._process_apiback)
self._pause_condition = Condition()
self._sync_ret = None
self._timeout = 0
self._timer_sleep = 1
self._sync_call_time_lock = Lock()
self._sync_call_time = datetime.now()
timer = Thread(target=self._run_timer)
timer.daemon = True
timer.start()
def _run_timer(self):
# @TODO 用python自带的Event替代。
while True:
if not self._timeout == 0:
with self._sync_call_time_lock:
mtime = self._sync_call_time
delta = (datetime.now() - mtime).seconds
if delta >= self._timeout:
# print("timeout", self._timeout, delta)
# 不可重入，保证self.rid就是超时的那个
with self._handlers_lock:
del self._handlers[self.rid]
log.debug("[RPCClient._runtimer] 处理超时, delete rid; %s" % self.rid)
self._timeout = 0
self._notify_server_data()
time.sleep(self._timer_sleep)
def _process_apiback(self, event):
assert(event.route == self.EVENT_FROM_SERVER)
self._timeout = 0
rid = event.args['rid']
try:
with self._handlers_lock:
handler = self._handlers[rid]
except KeyError:
log.info('[RPCClient._process_apiback] 放弃超时任务的返回结果')
else:
try:
if handler:
# 异步
handler(event.args['ret'])
else:
# 同步
self._sync_ret = event.args['ret']
self._notify_server_data()
except Exception as e:
log.error(e)
log.debug("[RPCClient._process_apiback] 删除已经完成的任务 rid; %s" % rid)
with self._handlers_lock:
del self._handlers[rid]
def call(self, apiname, args, handler):
""" 给定参数args，异步调用RPCServer的apiname服务,
返回结果做为回调函数handler的参数。
Args:
apiname (str): 服务API名称。
args (dict): 给服务API的参数。
handler (function): 回调函数。
"""
if not isinstance(args, dict):
raise InvalidRPCClientArguments(argtype=type(args))
assert(handler is not None)
log.debug('RPCClient [%s] sync_call: %s' % (self._name, apiname))
self.rid += 1
args['apiname'] = apiname
args['rid'] = self.rid
self._event_engine.emit(Event(self.EVENT_FROM_CLIENT, args))
with self._handlers_lock:
self._handlers[self.rid] = handler
def sync_call(self, apiname, args={}, timeout=5):
""" 给定参数args，同步调用RPCServer的apiname服务,
返回该服务的处理结果。如果超时，返回None。
Args:
apiname (str): 服务API名称。
args (dict): 给服务API的参数。
handler (function): 回调函数。
"""
log.debug('RPCClient [%s] sync_call: %s' % (self._name, apiname))
if not isinstance(args, dict):
self._timeout = 0
self._sync_ret = None
raise InvalidRPCClientArguments(argtype=type(args))
self.rid += 1
args['apiname'] = apiname
args['rid'] = self.rid
with self._sync_call_time_lock:
self._sync_call_time = datetime.now()
self._timeout = timeout
with self._handlers_lock:
self._handlers[self.rid] = None
self._event_engine.emit(Event(self.EVENT_FROM_CLIENT, args))
self._waiting_server_data()
ret = self._sync_ret
return ret
def _waiting_server_data(self):
with self._pause_condition:
self._pause_condition.wait()
def _notify_server_data(self):
with self._pause_condition:
self._pause_condition.notify()
class EventRPCServer(object):
def __init__(self, event_engine, service, event_client=None, event_server=None):
super(EventRPCServer, self).__init__()
self._routes = {}
self._routes_lock = Lock()
# server监听的client事件
self.EVENT_FROM_CLIENT = event_client if event_client else "EVENT_FROM_%s_CLIENT" % service.upper()
# client监听的server事件
self.EVENT_FROM_SERVER = event_server if event_server else "EVENT_FROM_%s_SERVER" % service.upper()
self._event_engine = event_engine
self._event_engine.register(self.EVENT_FROM_CLIENT, self._process_request)
log.info("[Create RPCServer %s]" % self.EVENT_FROM_CLIENT)
self._name = service.upper()
def register(self, route, handler):
""" 注册服务函数。
Args:
route (str): 服务名
handler (function): 回调函数
Returns:
Bool. 是否注册成功。
"""
if route in self._routes:
return False
with self._routes_lock:
self._routes[route] = handler
return True
def unregister(self, route):
""" 注销服务函数 """
with self._routes_lock:
if route in self._routes:
del self._routes[route]
def _process_request(self, event):
args = event.args
rid = args['rid']
apiname = args['apiname']
del args['rid']
del args['apiname']
log.debug('RPCServer [%s] process: %s' % (self._name, apiname))
try:
with self._routes_lock:
handler = self._routes[apiname]
# @TODO async
ret = handler(**args)
except Exception as e:
log.exception(e)
else:
args = {'ret': ret,
'rid': rid
}
log.debug('RPCServer [%s] emit %s' % (self._name,
str(self.EVENT_FROM_SERVER)))
self._event_engine.emit(Event(self.EVENT_FROM_SERVER, args))
if __name__ == '__main__':
from eventengine import ZMQEventEngine
import sys
def print_hello(data):
""""""
six.print_("***************")
six.print_("print_hello")
six.print_("args: ", data)
six.print_("return: ", 123)
return "123"
server_engine = ZMQEventEngine('test')
server_engine.start()
server = EventRPCServer(server_engine, 'test')
server.register("print_hello", print_hello)
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
server_engine.stop()
sys.exit(0)