StackStalk
  • Home
  • Java
    • Java Collection
    • Spring Boot Collection
  • Python
    • Python Collection
  • C++
    • C++ Collection
    • Progamming Problems
    • Algorithms
    • Data Structures
    • Design Patterns
  • General
    • Tips and Tricks

Tuesday, June 14, 2011

C++ Facade Design Pattern

 June 14, 2011     Design Patterns     No comments   

Facade design pattern is a structural design pattern. Makes an existing complex software library easier to use by providing a simpler interface for common tasks. In this article we will explore Facade design pattern with a sample implementation in C++.

Facade Design Pattern

  • Facade pattern is a structural design pattern.
  • Makes an existing complex software library easier to use by providing a simpler interface for common tasks.
  • Allows the applications/ clients using the library de-coupled from inner workings of a complex library.

Facade Design Pattern implmentation

#include <iostream>
using namespace std;

// Transfer library
class Usb {
public:
    bool isAvailable()
    {
        return false;
    }

    void connect()
    {
        cout << "Connecting via USB" << endl;
    }

    void send(string file)
    {
        cout << file << " sent." << endl;
    }
};

class Bluetooth {
public:
    bool isAvailable()
    {
        return true;
    }

    void connect()
    {
        cout << "Connecting via BT" << endl;
    }

    void authenticate()
    {
        cout << "Authenticating BT" << endl;
    }

    void send(string file)
    {
        cout << file << " sent." << endl;
    }
};

// The Facade
class FileTransfer {
public:
    void sendFile(string fileName)
    {
        Usb* u = new Usb();
        Bluetooth* b = new Bluetooth();
        if ( u->isAvailable() )
        {
            u->connect();
            u->send(fileName);
        }
        else if ( b->isAvailable() )
        {
            b->connect();
            b->authenticate();
            b->send(fileName);
        }
        else
        {
            cout << "Not sent" << endl;
        }
        delete b;
        delete u;
    }
};

// Test Program
int main()
{
    FileTransfer* ft = new FileTransfer();
    ft->sendFile("mypicture");
    delete ft;
}
OUTPUT:-
Connecting via BT
Authenticating BT
mypicture sent.
  • Share This:  
Newer Post Older Post Home

0 comments:

Post a Comment

Follow @StackStalk
Get new posts by email:
Powered by follow.it

Popular Posts

  • Avro Producer and Consumer with Python using Confluent Kafka
    In this article, we will understand Avro a popular data serialization format in streaming data applications and develop a simple Avro Produc...
  • Monitor Spring Boot App with Micrometer and Prometheus
    Modern distributed applications typically have multiple microservices working together. Ability to monitor and manage aspects like health, m...
  • Server-Sent Events with Spring WebFlux
    In this article we will review the concepts of server-sent events and work on an example using WebFlux. Before getting into this article it ...
  • Implement caching in a Spring Boot microservice using Redis
    In this article we will explore how to use Redis as a data cache for a Spring Boot microservice using PostgreSQL as the database. Idea is to...
  • Python FastAPI microservice with Okta and OPA
    Authentication (AuthN) and Authorization (AuthZ) is a common challenge when developing microservices. In this article, we will explore how t...
  • Spring Boot with Okta and OPA
    Authentication (AuthN) and Authorization (AuthZ) is a common challenge when developing microservices. In this article, we will explore how t...
  • Getting started with Kafka in Python
    This article will provide an overview of Kafka and how to get started with Kafka in Python with a simple example. What is Kafka? ...
  • Getting started in GraphQL with Spring Boot
    In this article we will explore basic concepts on GraphQL and look at how to develop a microservice in Spring Boot with GraphQL support. ...

Copyright © StackStalk