职责链模式(python)
职责链模式：将能处理请求的对象连成一条链，并沿着这条链传递该请求，直到有一个对象处理请求为止，避免请求的发送者和接收者之间的耦合关系。
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#encoding=utf-8
#
#by panda
#职责连模式
def printInfo(info):
print unicode(info, 'utf-8').encode('gbk')
#抽象职责类
class Manager():
successor = None
name = ''
def __init__(self, name):
self.name = name
def SetSuccessor(self, successor):
self.successor = successor
def HandleRequest(self, request):
pass
#具体职责类：经理
class CommonManager(Manager):
def HandleRequest(self, request):
if request.RequestType == '请假' and request.Number <= 2:
printInfo('%s:%s 数量%d 被批准' % (self.name, request.RequestContent, request.Number))
else:
if self.successor != None:
self.successor.HandleRequest(request)
#具体职责类：总监
class Majordomo(Manager):
def HandleRequest(self, request):
if request.RequestType == '请假' and request.Number <= 5:
printInfo('%s:%s 数量%d 被批准' % (self.name, request.RequestContent, request.Number))
else:
if self.successor != None:
self.successor.HandleRequest(request)
#具体职责类：总经理
class GeneralManager(Manager):
def HandleRequest(self, request):
if request.RequestType == '请假':
printInfo('%s:%s 数量%d 被批准' % (self.name, request.RequestContent, request.Number))
elif request.RequestType == '加薪' and request.Number <= 500:
printInfo('%s:%s 数量%d 被批准' % (self.name, request.RequestContent, request.Number))
elif request.RequestType == '加薪' and request.Number > 500:
printInfo('%s:%s 数量%d 再说吧' % (self.name, request.RequestContent, request.Number))
class Request():
RequestType = ''
RequestContent = ''
Number = 0
def clientUI():
jinLi = CommonManager('金力')
zongJian = Majordomo('宗健')
zhongJingLi = GeneralManager('钟金利')
jinLi.SetSuccessor(zongJian)
zongJian.SetSuccessor(zhongJingLi)
request = Request()
request.RequestType = '请假'
request.RequestContent = '小菜请假'
request.Number = 1
jinLi.HandleRequest(request)
request.RequestType = '请假'
request.RequestContent = '小菜请假'
request.Number = 5
jinLi.HandleRequest(request)
request.RequestType = '加薪'
request.RequestContent = '小菜要求加薪'
request.Number = 500
jinLi.HandleRequest(request)
request.RequestType = '加薪'
request.RequestContent = '小菜要求加薪'
request.Number = 1000
jinLi.HandleRequest(request)
return
if __name__ == '__main__':
clientUI();
类图：
摘自 ponder008的专栏
补充：Web开发 , Python ,
