IceGrid 用于Python服务器和客户端通信——参数传递

本篇介绍如何用IceGrid建立python多机通信，传递比较复杂的参数

Ice代码：Demo.ice

#ifndef TOS_ICE_COMMON
#define TOS_ICE_COMMON

module demo
{
    class EventArgs
    {
        string source;
        string occurTime;
    };

    struct Point
    {
        int x;
        int y;
    };

    class pointEventArgs extends EventArgs
    {
        Point pt;
    };

    interface PointEvent
    {
        ["amd","ami"] idempotent void OnNewPointEvent(pointEventArgs args);
    }
};

#endif

1.python安装zeroC Ice：

pip install zeroc-ice

或者参照：https://blog.****.net/qq_37556007/article/details/80843541

2.对Ice文件进行切片

slice2py Demo.ice

得到Demo_ice.py

3.编写客户端

import Demo_ice
import Ice
import sys
import time

class Client:
    def __init__(self):
        self.point = Demo_ice._M_demo.Point(x=10, y=20)
        self.event = Demo_ice._M_demo.pointEventArgs(source='client', occurTime=time.time().__str__(), pt=self.point)

        with Ice.initialize(sys.argv) as communicator:
            base = communicator.stringToProxy('Communicate:tcp -p 10001')
            self.contract = Demo_ice._M_demo.PointEventPrx.checkedCast(base)
            if not self.contract:
                raise RuntimeError('Invalid Proxy')
　　　　　　　　
　　　　　　　# 如要调用同步发送方法，方法名去掉Async即可
　　　　　　　# 参数加两个括号因为传过去的是个元组　
            self.contract.OnNewPointEventAsync((self.event))

Client()

4.编写服务器

import Demo_ice
import Ice
import sys

class DemoI(Demo_ice._M_demo.PointEvent):
　　# 不同于Java和C++ Slice出的抽象类，Python的类并不含有异步方法，继承的同步方法可以用于异步调用
    def OnNewPointEvent(self, args, current=None):
        print "Received:"
        print args

with Ice.initialize(sys.argv) as communicator:
    adapter = communicator.createObjectAdapterWithEndpoints("Communicate:tcp", "tcp -p 10001")
    object = DemoI()
    adapter.add(object, communicator.stringToIdentity("Communicate"))
    adapter.activate()
    communicator.waitForShutdown()