设计模式十九（中介者模式，python语言实现）

基本原理请参考相关资料，这里直接给实例。

 

基本说明：中介者模式，（ 仲裁者、集中控制），隔离了各个对象间的直接耦合

 

指挥中心分：灾害处理中心（DisasterDealCenter），边境处理中心（FrontierDealCenter）

 

处理小分队分：警犬巡逻队（SentryA），边境情报对（SentryB），边境缉毒队（sentryC）

 

小队间是平行级别，需要帮助时，向注册的指挥中心发出请求。

指挥中心根据请求，回复该小队，并安排其它小队配合

 

 

# -*- coding: GB18030 -*-######################################################## # mediator.py# Python implementation of the Class DisasterDealCenter# Generated by Enterprise Architect# Created on:      15-十二月-2012 13:26:57# #######################################################from __future__ import divisionfrom __future__ import print_functionfrom __future__ import unicode_literalsfrom future_builtins import *    class Headquarters(object):    """This class defines an interface for communicating with Colleague objects.    """    def __init__(self,name='司令部'):        self.name=name        pass    def Request(self, sentry):        passclass DisasterDealCenter(Headquarters):    """This class defines an interface for communicating with Colleague objects.    """    def __init__(self,name='灾害处理中心'):        super(DisasterDealCenter,self).__init__(name)        pass    def Request(self, sentry):        passclass FrontierDealCenter(Headquarters):    """This class defines an interface for communicating with Colleague objects.    """    def __init__( self,name='边防处理中心'):        super(FrontierDealCenter,self).__init__(name)        self.ls=list()        pass    def Register(self,sentry):        self.ls.append(sentry)        pass    def Request(self, sentry):        print('#############################')        print(self.name+':')        print('   收到信息：'+sentry.info+ '  来源：' +sentry.name)        print('   处理：请其它小队配合')                print('\n')        sentry.Recieve('已派其它小队配合你部')        print('\n')                for obj in self.ls:            if obj!=sentry:                obj.Recieve('请迅速配合'+sentry.name)                pass            pass        passclass Sentry(object):    """Each colleague class knows its mediator object and communicates with its    mediator whenever it would have otherwise communicated with another colleague.    """    m_Headquarters= Headquarters()    def __init__(self, name):        self.info=None        self.mediator=None        self.name=name        pass    def Recieve(self, info):        print(self.name+':')        print('   收到信息：'+info)        pass    def Send(self,mediator):        pass        def Register(self,mediator):        self.mediator=mediator        pass    class SentryA(Sentry):    """Each colleague class knows its mediator object and communicates with its    mediator whenever it would have otherwise communicated with another colleague.    """    m_FrontierDealCenter= FrontierDealCenter()    def __init__(self, name='警犬巡逻队'):        super(SentryA,self).__init__(name)        pass    def Send(self):        self.info='发现可疑物品'        self.mediator.Request(self)        passclass SentryB(Sentry):    """Each colleague class knows its mediator object and communicates with its    mediator whenever it would have otherwise communicated with another colleague.    """    m_FrontierDealCenter= FrontierDealCenter()    def __init__(self, name='边境情报队'):        super(SentryB,self).__init__(name)            def Send(self):        self.info='四点整，边境将有可疑组织活动'        self.mediator.Request(self)                passclass SentryC(Sentry):    """Each colleague class knows its mediator object and communicates with its    mediator whenever it would have otherwise communicated with another colleague.    """    m_FrontierDealCenter= FrontierDealCenter()    def __init__(self, name='边境缉毒队'):        super(SentryC,self).__init__(name)    def Send(self):        self.info='有毒贩入境'        self.mediator.Request(self)                pass    #客户端if(__name__=="__main__"):        #建立边防事务指挥中心    m_FrontierDealCenter=FrontierDealCenter()        #成立边防小队    m_SentryA=SentryA()    m_SentryB=SentryB()        m_SentryC=SentryC()        #在指挥中心注册小队    m_FrontierDealCenter.Register(m_SentryA)    m_FrontierDealCenter.Register(m_SentryB)       m_FrontierDealCenter.Register(m_SentryC)    #在各小队注册指挥中心        m_SentryA.Register(m_FrontierDealCenter)     m_SentryB.Register(m_FrontierDealCenter)        m_SentryC.Register(m_FrontierDealCenter)           #请求    m_SentryB.Send()    m_SentryA.Send()

 

运行结果：