责任链把处理请求的对象 连接为一个链，逐级传递，直到有对象处理该请求。
#include "PublicHeaders.h"
#pragma once
class Request
{
public:
virtual int GetType()
{
return this->_type;
}
Request(int t)
{
this->_type = t;
}
private:
int _type;
};
class Handler
{
public:
virtual void HandleRequest(Request*request) = 0;
void setSuccessor(Handler *s)
{
this->successor = s;
}
protected:
Handler *successor = nullptr;
};
class HandlerA :public Handler
{
public:
virtual void HandleRequest(Request*request)override
{
if (request->GetType() == 0)
{
cout << "do request success in " << __FUNCTION__ << endl;
return;
}
if (successor)
{
successor->HandleRequest(request);
}
}
};
class HandlerB :public Handler
{
public:
public:
virtual void HandleRequest(Request*request)override
{
if (request->GetType() == 1)
{
cout << "do request success in " << __FUNCTION__ << endl;
return;
}
if (successor)
{
successor->HandleRequest(request);
}
}
};
void testChain()
{
Handler *ha = new HandlerA;
Handler*hb = new HandlerB;
ha->setSuccessor(hb);
Request *re = new Request(0);
ha->HandleRequest(re);
}- #include "PublicHeaders.h"
- #pragma once
- class Request
- {
- public:
- virtual int GetType()
- {
- return this->_type;
- }
- Request(int t)
- {
- this->_type = t;
- }
- private:
- int _type;
- };
- class Handler
- {
- public:
- virtual void HandleRequest(Request*request) = 0;
- void setSuccessor(Handler *s)
- {
- this->successor = s;
- }
- protected:
- Handler *successor = nullptr;
-
- };
- class HandlerA :public Handler
- {
- public:
- virtual void HandleRequest(Request*request)override
- {
- if (request->GetType() == 0)
- {
- cout << "do request success in " << __FUNCTION__ << endl;
- return;
- }
- if (successor)
- {
- successor->HandleRequest(request);
- }
- }
- };
- class HandlerB :public Handler
- {
- public:
- public:
- virtual void HandleRequest(Request*request)override
- {
- if (request->GetType() == 1)
- {
- cout << "do request success in " << __FUNCTION__ << endl;
- return;
- }
- if (successor)
- {
- successor->HandleRequest(request);
- }
- }
- };
- void testChain()
- {
- Handler *ha = new HandlerA;
- Handler*hb = new HandlerB;
- ha->setSuccessor(hb);
- Request *re = new Request(0);
- ha->HandleRequest(re);
- }
#include "PublicHeaders.h"
#pragma once
class Request
{
public:
virtual int GetType()
{
return this->_type;
}
Request(int t)
{
this->_type = t;
}
private:
int _type;
};
class Handler
{
public:
virtual void HandleRequest(Request*request) = 0;
void setSuccessor(Handler *s)
{
this->successor = s;
}
protected:
Handler *successor = nullptr;
};
class HandlerA :public Handler
{
public:
virtual void HandleRequest(Request*request)override
{
if (request->GetType() == 0)
{
cout << "do request success in " << __FUNCTION__ << endl;
return;
}
if (successor)
{
successor->HandleRequest(request);
}
}
};
class HandlerB :public Handler
{
public:
public:
virtual void HandleRequest(Request*request)override
{
if (request->GetType() == 1)
{
cout << "do request success in " << __FUNCTION__ << endl;
return;
}
if (successor)
{
successor->HandleRequest(request);
}
}
};
void testChain()
{
Handler *ha = new HandlerA;
Handler*hb = new HandlerB;
ha->setSuccessor(hb);
Request *re = new Request(0);
ha->HandleRequest(re);
}