sync vnpy1.6.2

This commit is contained in:
msincenselee 2017-06-13 10:33:48 +08:00
parent 4638df00c6
commit c3947013f0
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vnpy/rpc/README.md Normal file
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# vn.rpc
### 简介
提供跨进程服务调用的RPC模块同时支持服务端向客户端的主动数据推送用于实现vn.py框架下模块的多进程解耦。
### 说明
1. 使用zmq作为底层通讯库
2. 目前支持两种数据序列化方案msgpack默认和json用户在RpcObject中可以自行添加其他方案
3. 客户端和服务端通过REQ-REP模式实现跨进程服务调用
4. 客户端和服务端通过SUB-PUB模式实现主动数据推送
5. RpcClient的send和RpcServer的publish函数不是多线程安全的在多线程中使用时需要用户自行加锁否则可能导致zmq底层崩溃
6. 考虑到vn.rpc的主要应用场景是本机多进程或者局域网内分布式架构网络可靠性较高因此没有在模块中提供心跳功能用户可以视乎自己的需求添加

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vnpy/rpc/__init__.py Normal file
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# encoding: UTF-8
from .vnrpc import RpcServer, RpcClient, RemoteException

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vnpy/rpc/testClient.py Normal file
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# encoding: UTF-8
from time import sleep
from vnrpc import RpcClient
########################################################################
class TestClient(RpcClient):
""""""
#----------------------------------------------------------------------
def __init__(self, reqAddress, subAddress):
"""Constructor"""
super(TestClient, self).__init__(reqAddress, subAddress)
#----------------------------------------------------------------------
def callback(self, topic, data):
"""回调函数实现"""
print 'client received topic:', topic, ', data:', data
if __name__ == '__main__':
reqAddress = 'tcp://localhost:2014'
subAddress = 'tcp://localhost:0602'
tc = TestClient(reqAddress, subAddress)
tc.subscribeTopic('')
tc.start()
while 1:
print tc.add(1, 3)
sleep(2)

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vnpy/rpc/testServer.py Normal file
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# encoding: UTF-8
from time import sleep, time
from vnrpc import RpcServer
########################################################################
class TestServer(RpcServer):
"""测试服务器"""
#----------------------------------------------------------------------
def __init__(self, repAddress, pubAddress):
"""Constructor"""
super(TestServer, self).__init__(repAddress, pubAddress)
self.register(self.add)
#----------------------------------------------------------------------
def add(self, a, b):
"""测试函数"""
print 'receiving: %s, %s' % (a,b)
return a + b
if __name__ == '__main__':
repAddress = 'tcp://*:2014'
pubAddress = 'tcp://*:0602'
ts = TestServer(repAddress, pubAddress)
ts.start()
while 1:
content = 'current server time is %s' % time()
print content
ts.publish('test', content)
sleep(2)

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vnpy/rpc/vnrpc.py Normal file
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# encoding: UTF-8
import threading
import traceback
import signal
import zmq
from msgpack import packb, unpackb
from json import dumps, loads
import cPickle
pDumps = cPickle.dumps
pLoads = cPickle.loads
# 实现Ctrl-c中断recv
signal.signal(signal.SIGINT, signal.SIG_DFL)
########################################################################
class RpcObject(object):
"""
RPC对象
提供对数据的序列化打包和解包接口目前提供了jsonmsgpackcPickle三种工具
msgpack性能更高但通常需要安装msgpack相关工具
json性能略低但通用性更好大部分编程语言都内置了相关的库
cPickle性能一般且仅能用于Python但是可以直接传送Python对象非常方便
因此建议尽量使用msgpack如果要和某些语言通讯没有提供msgpack时再使用json
当传送的数据包含很多自定义的Python对象时建议使用cPickle
如果希望使用其他的序列化工具也可以在这里添加
"""
#----------------------------------------------------------------------
def __init__(self):
"""Constructor"""
# 默认使用msgpack作为序列化工具
#self.useMsgpack()
self.usePickle()
#----------------------------------------------------------------------
def pack(self, data):
"""打包"""
pass
#----------------------------------------------------------------------
def unpack(self, data):
"""解包"""
pass
#----------------------------------------------------------------------
def __jsonPack(self, data):
"""使用json打包"""
return dumps(data)
#----------------------------------------------------------------------
def __jsonUnpack(self, data):
"""使用json解包"""
return loads(data)
#----------------------------------------------------------------------
def __msgpackPack(self, data):
"""使用msgpack打包"""
return packb(data)
#----------------------------------------------------------------------
def __msgpackUnpack(self, data):
"""使用msgpack解包"""
return unpackb(data)
#----------------------------------------------------------------------
def __picklePack(self, data):
"""使用cPickle打包"""
return pDumps(data)
#----------------------------------------------------------------------
def __pickleUnpack(self, data):
"""使用cPickle解包"""
return pLoads(data)
#----------------------------------------------------------------------
def useJson(self):
"""使用json作为序列化工具"""
self.pack = self.__jsonPack
self.unpack = self.__jsonUnpack
#----------------------------------------------------------------------
def useMsgpack(self):
"""使用msgpack作为序列化工具"""
self.pack = self.__msgpackPack
self.unpack = self.__msgpackUnpack
#----------------------------------------------------------------------
def usePickle(self):
"""使用cPickle作为序列化工具"""
self.pack = self.__picklePack
self.unpack = self.__pickleUnpack
########################################################################
class RpcServer(RpcObject):
"""RPC服务器"""
#----------------------------------------------------------------------
def __init__(self, repAddress, pubAddress):
"""Constructor"""
super(RpcServer, self).__init__()
# 保存功能函数的字典key是函数名value是函数对象
self.__functions = {}
# zmq端口相关
self.__context = zmq.Context()
self.__socketREP = self.__context.socket(zmq.REP) # 请求回应socket
self.__socketREP.bind(repAddress)
self.__socketPUB = self.__context.socket(zmq.PUB) # 数据广播socket
self.__socketPUB.bind(pubAddress)
# 工作线程相关
self.__active = False # 服务器的工作状态
self.__thread = threading.Thread(target=self.run) # 服务器的工作线程
#----------------------------------------------------------------------
def start(self):
"""启动服务器"""
# 将服务器设为启动
self.__active = True
# 启动工作线程
if not self.__thread.isAlive():
self.__thread.start()
#----------------------------------------------------------------------
def stop(self):
"""停止服务器"""
# 将服务器设为停止
self.__active = False
# 等待工作线程退出
if self.__thread.isAlive():
self.__thread.join()
#----------------------------------------------------------------------
def run(self):
"""服务器运行函数"""
while self.__active:
# 使用poll来等待事件到达等待1秒1000毫秒
if not self.__socketREP.poll(1000):
continue
# 从请求响应socket收取请求数据
reqb = self.__socketREP.recv()
# 序列化解包
req = self.unpack(reqb)
# 获取函数名和参数
name, args, kwargs = req
# 获取引擎中对应的函数对象,并执行调用,如果有异常则捕捉后返回
try:
func = self.__functions[name]
r = func(*args, **kwargs)
rep = [True, r]
except Exception as e:
rep = [False, traceback.format_exc()]
# 序列化打包
repb = self.pack(rep)
# 通过请求响应socket返回调用结果
self.__socketREP.send(repb)
#----------------------------------------------------------------------
def publish(self, topic, data):
"""
广播推送数据
topic主题内容
data具体的数据
"""
# 序列化数据
datab = self.pack(data)
# 通过广播socket发送数据
self.__socketPUB.send_multipart([topic, datab])
#----------------------------------------------------------------------
def register(self, func):
"""注册函数"""
self.__functions[func.__name__] = func
########################################################################
class RpcClient(RpcObject):
"""RPC客户端"""
#----------------------------------------------------------------------
def __init__(self, reqAddress, subAddress):
"""Constructor"""
super(RpcClient, self).__init__()
# zmq端口相关
self.__reqAddress = reqAddress
self.__subAddress = subAddress
self.__context = zmq.Context()
self.__socketREQ = self.__context.socket(zmq.REQ) # 请求发出socket
self.__socketSUB = self.__context.socket(zmq.SUB) # 广播订阅socket
# 工作线程相关,用于处理服务器推送的数据
self.__active = False # 客户端的工作状态
self.__thread = threading.Thread(target=self.run) # 客户端的工作线程
#----------------------------------------------------------------------
def __getattr__(self, name):
"""实现远程调用功能"""
# 执行远程调用任务
def dorpc(*args, **kwargs):
# 生成请求
req = [name, args, kwargs]
# 序列化打包请求
reqb = self.pack(req)
# 发送请求并等待回应
self.__socketREQ.send(reqb)
repb = self.__socketREQ.recv()
# 序列化解包回应
rep = self.unpack(repb)
# 若正常则返回结果,调用失败则触发异常
if rep[0]:
return rep[1]
else:
raise RemoteException(rep[1])
return dorpc
#----------------------------------------------------------------------
def start(self):
"""启动客户端"""
# 连接端口
self.__socketREQ.connect(self.__reqAddress)
self.__socketSUB.connect(self.__subAddress)
# 将服务器设为启动
self.__active = True
# 启动工作线程
if not self.__thread.isAlive():
self.__thread.start()
#----------------------------------------------------------------------
def stop(self):
"""停止客户端"""
# 将客户端设为停止
self.__active = False
# 等待工作线程退出
if self.__thread.isAlive():
self.__thread.join()
#----------------------------------------------------------------------
def run(self):
"""客户端运行函数"""
while self.__active:
# 使用poll来等待事件到达等待1秒1000毫秒
if not self.__socketSUB.poll(1000):
continue
# 从订阅socket收取广播数据
topic, datab = self.__socketSUB.recv_multipart()
# 序列化解包
data = self.unpack(datab)
# 调用回调函数处理
self.callback(topic, data)
#----------------------------------------------------------------------
def callback(self, topic, data):
"""回调函数,必须由用户实现"""
raise NotImplementedError
#----------------------------------------------------------------------
def subscribeTopic(self, topic):
"""
订阅特定主题的广播数据
可以使用topic=''来订阅所有的主题
"""
self.__socketSUB.setsockopt(zmq.SUBSCRIBE, topic)
########################################################################
class RemoteException(Exception):
"""RPC远程异常"""
#----------------------------------------------------------------------
def __init__(self, value):
"""Constructor"""
self.__value = value
#----------------------------------------------------------------------
def __str__(self):
"""输出错误信息"""
return self.__value