{"id":5916,"date":"2023-06-21T09:58:11","date_gmt":"2023-06-21T12:58:11","guid":{"rendered":"https:\/\/elemarjr.com\/clube-de-estudos\/?p=5916"},"modified":"2023-10-21T21:35:17","modified_gmt":"2023-10-22T00:35:17","slug":"mediator-pattern-facilitando-a-comunicacao-entre-objetos-em-um-sistema","status":"publish","type":"artigos","link":"https:\/\/elemarjr.com\/clube-de-estudos\/artigos\/mediator-pattern-facilitando-a-comunicacao-entre-objetos-em-um-sistema\/","title":{"rendered":"Mediator Pattern: Facilitando a Comunica\u00e7\u00e3o entre Objetos em um Sistema"},"content":{"rendered":"\n

O padr\u00e3o de projeto Mediator<\/em> tem um papel crucial na arquitetura de software<\/em>. Seu principal objetivo \u00e9 facilitar a comunica\u00e7\u00e3o entre objetos em um sistema, agindo como um intermedi\u00e1rio para centralizar e gerenciar essa comunica\u00e7\u00e3o.<\/p>\n\n\n\n

A Import\u00e2ncia do Mediator Pattern no Desenvolvimento de Software<\/h2>\n\n\n\n

Com a crescente complexidade dos sistemas de software<\/em>, a necessidade de efici\u00eancia e organiza\u00e7\u00e3o tornou-se imperativa. Aqui \u00e9 onde o Mediator Pattern<\/em> brilha. Ao simplificar a comunica\u00e7\u00e3o entre objetos e reduzir o acoplamento, ele aumenta a efici\u00eancia do sistema e permite um fluxo de trabalho mais fluido.<\/p>\n\n\n\n

Como o Mediator Pattern Facilita a Comunica\u00e7\u00e3o entre os Objetos<\/h2>\n\n\n\n

O Mediator Pattern<\/em> atua como um intermedi\u00e1rio, permitindo que os objetos se comuniquem de maneira indireta. Isso significa que em vez de cada objeto ter que conhecer e interagir com todos os outros, eles apenas interagem com o mediador. O mediador, por sua vez, cuida da comunica\u00e7\u00e3o com outros objetos conforme necess\u00e1rio.<\/p>\n\n\n\n

Benef\u00edcios da Utiliza\u00e7\u00e3o do Mediator Pattern<\/h2>\n\n\n\n

Flexibilidade e Modularidade<\/h3>\n\n\n\n

O Mediator Pattern <\/em>promove a flexibilidade e modularidade, j\u00e1 que os objetos podem interagir sem se conhecerem diretamente. Isso tamb\u00e9m facilita a substitui\u00e7\u00e3o, adi\u00e7\u00e3o ou remo\u00e7\u00e3o de objetos sem causar grandes impactos no sistema.<\/p>\n\n\n\n

Manuten\u00e7\u00e3o Facilitada<\/h3>\n\n\n\n

A manuten\u00e7\u00e3o do sistema torna-se mais simples, pois as mudan\u00e7as em um objeto n\u00e3o afetam diretamente os outros. Altera\u00e7\u00f5es e corre\u00e7\u00f5es podem ser feitas no mediador, sem a necessidade de alterar cada objeto individualmente.<\/p>\n\n\n\n

Escalabilidade do Sistema<\/h3>\n\n\n\n

Este padr\u00e3o favorece a escalabilidade, j\u00e1 que a adi\u00e7\u00e3o de novos objetos ou funcionalidades n\u00e3o afeta a complexidade das comunica\u00e7\u00f5es.<\/p>\n\n\n\n

Principais Usos e Exemplos do Mediator Pattern<\/h2>\n\n\n\n

O Mediator Pattern <\/em>\u00e9 comumente usado em sistemas onde h\u00e1 muitos objetos que precisam interagir, como interfaces gr\u00e1ficas, simula\u00e7\u00f5es e sistemas de fluxo de trabalho.<\/p>\n\n\n\n

Exemplo de implementa\u00e7\u00e3o em C#<\/h3>\n\n\n\n
C#<\/span><\/path><\/path><\/svg><\/span>
\/\/ Interface do Mediator<\/span><\/span>\npublic<\/span> <\/span>interface<\/span> IMediator<\/span><\/span>\n{<\/span><\/span>\n    <\/span>void<\/span> <\/span>EnviarMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>,<\/span> Colleague colleague<\/span>)<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classe Mediator concreta<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>Mediator<\/span> <\/span>:<\/span> IMediator<\/span><\/span>\n{<\/span><\/span>\n    <\/span>private<\/span> Colleague colleague1<\/span>;<\/span><\/span>\n    <\/span>private<\/span> Colleague colleague2<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> Colleague Colleague1<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>set<\/span> <\/span>{<\/span> <\/span>colleague1<\/span> <\/span>=<\/span> <\/span>value<\/span>;<\/span> <\/span>}<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> Colleague Colleague2<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>set<\/span> <\/span>{<\/span> <\/span>colleague2<\/span> <\/span>=<\/span> <\/span>value<\/span>;<\/span> <\/span>}<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>EnviarMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>,<\/span> Colleague colleague<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>if<\/span> <\/span>(<\/span>colleague<\/span> <\/span>==<\/span> <\/span>colleague1<\/span>)<\/span><\/span>\n        <\/span>{<\/span><\/span>\n            <\/span>colleague2<\/span>.<\/span>ReceberMensagem<\/span>(<\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n        <\/span>}<\/span><\/span>\n        <\/span>else<\/span> <\/span>if<\/span> <\/span>(<\/span>colleague<\/span> <\/span>==<\/span> <\/span>colleague2<\/span>)<\/span><\/span>\n        <\/span>{<\/span><\/span>\n            <\/span>colleague1<\/span>.<\/span>ReceberMensagem<\/span>(<\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n        <\/span>}<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classe Colleague base<\/span><\/span>\npublic<\/span> <\/span>abstract<\/span> <\/span>class<\/span> <\/span>Colleague<\/span><\/span>\n{<\/span><\/span>\n    <\/span>protected<\/span> IMediator mediator<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>Colleague<\/span>(<\/span>IMediator mediator<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>this<\/span>.<\/span>mediator<\/span> <\/span>=<\/span> <\/span>mediator<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>abstract<\/span> <\/span>void<\/span> <\/span>EnviarMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>public<\/span> <\/span>abstract<\/span> <\/span>void<\/span> <\/span>ReceberMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classes Colleague concretas<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>ConcreteColleague1<\/span> <\/span>:<\/span> Colleague<\/span><\/span>\n{<\/span><\/span>\n    <\/span>public<\/span> <\/span>ConcreteColleague1<\/span>(<\/span>IMediator mediator<\/span>)<\/span> <\/span>:<\/span> <\/span>base<\/span>(<\/span>mediator<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>override<\/span> <\/span>void<\/span> <\/span>EnviarMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>EnviarMensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>this<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>override<\/span> <\/span>void<\/span> <\/span>ReceberMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>Console<\/span>.<\/span>WriteLine<\/span>(<\/span>"<\/span>ConcreteColleague1 recebeu a mensagem: <\/span>"<\/span> <\/span>+<\/span> <\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\npublic<\/span> <\/span>class<\/span> <\/span>ConcreteColleague2<\/span> <\/span>:<\/span> Colleague<\/span><\/span>\n{<\/span><\/span>\n    <\/span>public<\/span> <\/span>ConcreteColleague2<\/span>(<\/span>IMediator mediator<\/span>)<\/span> <\/span>:<\/span> <\/span>base<\/span>(<\/span>mediator<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>override<\/span> <\/span>void<\/span> <\/span>EnviarMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>EnviarMensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>this<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>override<\/span> <\/span>void<\/span> <\/span>ReceberMensagem<\/span>(<\/span>string<\/span> mensagem<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>Console<\/span>.<\/span>WriteLine<\/span>(<\/span>"<\/span>ConcreteColleague2 recebeu a mensagem: <\/span>"<\/span> <\/span>+<\/span> <\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Exemplo de uso<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>Program<\/span><\/span>\n{<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>Main<\/span>(<\/span>string<\/span>[]<\/span> args<\/span>)<\/span><\/span>\n    <\/span>{<\/span><\/span>\n        <\/span>\/\/ Cria o Mediator<\/span><\/span>\n        Mediator mediator <\/span>=<\/span> <\/span>new<\/span> Mediator<\/span>()<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Cria os Colleagues<\/span><\/span>\n        ConcreteColleague1 colleague1 <\/span>=<\/span> <\/span>new<\/span> ConcreteColleague1<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n        ConcreteColleague2 colleague2 <\/span>=<\/span> <\/span>new<\/span> ConcreteColleague2<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Define os Colleagues no Mediator<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>Colleague1<\/span> <\/span>=<\/span> <\/span>colleague1<\/span>;<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>Colleague2<\/span> <\/span>=<\/span> <\/span>colleague2<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Envio de mensagens<\/span><\/span>\n        <\/span>colleague1<\/span>.<\/span>EnviarMensagem<\/span>(<\/span>"<\/span>Ol\u00e1, como voc\u00ea est\u00e1?<\/span>"<\/span>)<\/span>;<\/span><\/span>\n        <\/span>colleague2<\/span>.<\/span>EnviarMensagem<\/span>(<\/span>"<\/span>Estou bem, obrigado!<\/span>"<\/span>)<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>Console<\/span>.<\/span>ReadLine<\/span>()<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Fonte: ChatGPT<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
Neste exemplo, temos um Mediator que atua como intermedi\u00e1rio entre os Colleagues ConcreteColleague1<\/code> e ConcreteColleague2<\/code>. Quando um Colleague envia uma mensagem, o Mediator recebe a mensagem e repassa para o outro Colleague. Dessa forma, os Colleagues se comunicam de forma indireta, evitando o acoplamento direto entre eles.<\/p>\n\n\n\n
Exemplo de implementa\u00e7\u00e3o em Java<\/h3>\n\n\n\n
Java<\/span><\/path><\/path><\/svg><\/span>
\/\/ Interface do Mediator<\/span><\/span>\ninterface<\/span> <\/span>Mediator<\/span> <\/span>{<\/span><\/span>\n    <\/span>void<\/span> <\/span>enviarMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>,<\/span> <\/span>Colleague<\/span> <\/span>colleague<\/span>)<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classe Mediator concreta<\/span><\/span>\nclass<\/span> <\/span>ConcreteMediator<\/span> <\/span>implements<\/span> <\/span>Mediator<\/span> <\/span>{<\/span><\/span>\n    <\/span>private<\/span> <\/span>Colleague<\/span> <\/span>colleague1<\/span>;<\/span><\/span>\n    <\/span>private<\/span> <\/span>Colleague<\/span> <\/span>colleague2<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>setColleague1<\/span>(<\/span>Colleague<\/span> <\/span>colleague<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>this<\/span>.<\/span>colleague1<\/span> <\/span>=<\/span> colleague<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>setColleague2<\/span>(<\/span>Colleague<\/span> <\/span>colleague<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>this<\/span>.<\/span>colleague2<\/span> <\/span>=<\/span> colleague<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>enviarMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>,<\/span> <\/span>Colleague<\/span> <\/span>colleague<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>if<\/span> <\/span>(<\/span>colleague <\/span>==<\/span> colleague1<\/span>)<\/span> <\/span>{<\/span><\/span>\n            <\/span>colleague2<\/span>.<\/span>receberMensagem<\/span>(<\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n        <\/span>}<\/span> <\/span>else<\/span> <\/span>if<\/span> <\/span>(<\/span>colleague <\/span>==<\/span> colleague2<\/span>)<\/span> <\/span>{<\/span><\/span>\n            <\/span>colleague1<\/span>.<\/span>receberMensagem<\/span>(<\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n        <\/span>}<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classe Colleague base<\/span><\/span>\nabstract<\/span> <\/span>class<\/span> <\/span>Colleague<\/span> <\/span>{<\/span><\/span>\n    <\/span>protected<\/span> <\/span>Mediator<\/span> <\/span>mediator<\/span>;<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>Colleague<\/span>(<\/span>Mediator<\/span> <\/span>mediator<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>this<\/span>.<\/span>mediator<\/span> <\/span>=<\/span> mediator<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>abstract<\/span> <\/span>void<\/span> <\/span>enviarMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>public<\/span> <\/span>abstract<\/span> <\/span>void<\/span> <\/span>receberMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span>;<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Classes Colleague concretas<\/span><\/span>\nclass<\/span> <\/span>ConcreteColleague1<\/span> <\/span>extends<\/span> <\/span>Colleague<\/span> <\/span>{<\/span><\/span>\n    <\/span>public<\/span> <\/span>ConcreteColleague1<\/span>(<\/span>Mediator<\/span> <\/span>mediator<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>super<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>enviarMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>enviarMensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>this<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>receberMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"<\/span>ConcreteColleague1 recebeu a mensagem: <\/span>"<\/span> <\/span>+<\/span> mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>ConcreteColleague2<\/span> <\/span>extends<\/span> <\/span>Colleague<\/span> <\/span>{<\/span><\/span>\n    <\/span>public<\/span> <\/span>ConcreteColleague2<\/span>(<\/span>Mediator<\/span> <\/span>mediator<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>super<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>enviarMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>mediator<\/span>.<\/span>enviarMensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>this<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n<\/span>\n    <\/span>public<\/span> <\/span>void<\/span> <\/span>receberMensagem<\/span>(<\/span>String<\/span> <\/span>mensagem<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"<\/span>ConcreteColleague2 recebeu a mensagem: <\/span>"<\/span> <\/span>+<\/span> mensagem<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Exemplo de uso<\/span><\/span>\npublic<\/span> <\/span>class<\/span> <\/span>Main<\/span> <\/span>{<\/span><\/span>\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[]<\/span> <\/span>args<\/span>)<\/span> <\/span>{<\/span><\/span>\n        <\/span>\/\/ Cria o Mediator<\/span><\/span>\n        <\/span>Mediator<\/span> <\/span>mediator<\/span> <\/span>=<\/span> <\/span>new<\/span> <\/span>ConcreteMediator<\/span>()<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Cria os Colleagues<\/span><\/span>\n        <\/span>Colleague<\/span> <\/span>colleague1<\/span> <\/span>=<\/span> <\/span>new<\/span> <\/span>ConcreteColleague1<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n        <\/span>Colleague<\/span> <\/span>colleague2<\/span> <\/span>=<\/span> <\/span>new<\/span> <\/span>ConcreteColleague2<\/span>(<\/span>mediator<\/span>)<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Define os Colleagues no Mediator<\/span><\/span>\n        <\/span>((<\/span>ConcreteMediator<\/span>)<\/span> mediator<\/span>).<\/span>setColleague1<\/span>(<\/span>colleague1<\/span>)<\/span>;<\/span><\/span>\n        <\/span>((<\/span>ConcreteMediator<\/span>)<\/span> mediator<\/span>).<\/span>setColleague2<\/span>(<\/span>colleague2<\/span>)<\/span>;<\/span><\/span>\n<\/span>\n        <\/span>\/\/ Envio de mensagens<\/span><\/span>\n        <\/span>colleague1<\/span>.<\/span>enviarMensagem<\/span>(<\/span>"<\/span>Ol\u00e1, como voc\u00ea est\u00e1?<\/span>"<\/span>)<\/span>;<\/span><\/span>\n        <\/span>colleague2<\/span>.<\/span>enviarMensagem<\/span>(<\/span>"<\/span>Estou bem, obrigado!<\/span>"<\/span>)<\/span>;<\/span><\/span>\n    <\/span>}<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n\/\/ Fonte: ChatGPT<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
Neste exemplo em Java, temos um Mediator concreto (ConcreteMediator) que atua como intermedi\u00e1rio entre os Colleagues ConcreteColleague1<\/code> e ConcreteColleague2<\/code>. Quando um Colleague envia uma mensagem, o Mediator recebe a mensagem e repassa para o outro Colleague. Dessa forma, os Colleagues se comunicam de forma indireta, evitando o acoplamento direto entre eles.<\/p>\n\n\n\n
Exemplo de implementa\u00e7\u00e3o em Python<\/h3>\n\n\n\n
Python<\/span><\/path><\/path><\/svg><\/span>
# Classe Mediator<\/span><\/span>\nclass<\/span> <\/span>Mediator<\/span>:<\/span><\/span>\n    <\/span>def<\/span> <\/span>enviar_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>,<\/span> <\/span>colleague<\/span>):<\/span><\/span>\n        <\/span>pass<\/span><\/span>\n<\/span>\n# Classe Mediator concreta<\/span><\/span>\nclass<\/span> <\/span>ConcreteMediator<\/span>(<\/span>Mediator<\/span>):<\/span><\/span>\n    <\/span>def<\/span> <\/span>__init__<\/span>(<\/span>self<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>colleague1 <\/span>=<\/span> <\/span>None<\/span><\/span>\n        <\/span>self<\/span>.<\/span>colleague2 <\/span>=<\/span> <\/span>None<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>set_colleague1<\/span>(<\/span>self<\/span>,<\/span> <\/span>colleague<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>colleague1 <\/span>=<\/span> colleague<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>set_colleague2<\/span>(<\/span>self<\/span>,<\/span> <\/span>colleague<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>colleague2 <\/span>=<\/span> colleague<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>enviar_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>,<\/span> <\/span>colleague<\/span>):<\/span><\/span>\n        <\/span>if<\/span> colleague <\/span>==<\/span> <\/span>self<\/span>.<\/span>colleague1<\/span>:<\/span><\/span>\n            <\/span>self<\/span>.<\/span>colleague2<\/span>.<\/span>receber_mensagem<\/span>(<\/span>mensagem<\/span>)<\/span><\/span>\n        <\/span>elif<\/span> colleague <\/span>==<\/span> <\/span>self<\/span>.<\/span>colleague2<\/span>:<\/span><\/span>\n            <\/span>self<\/span>.<\/span>colleague1<\/span>.<\/span>receber_mensagem<\/span>(<\/span>mensagem<\/span>)<\/span><\/span>\n<\/span>\n# Classe Colleague base<\/span><\/span>\nclass<\/span> <\/span>Colleague<\/span>:<\/span><\/span>\n    <\/span>def<\/span> <\/span>__init__<\/span>(<\/span>self<\/span>,<\/span> <\/span>mediator<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>mediator <\/span>=<\/span> mediator<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>enviar_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>pass<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>receber_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>pass<\/span><\/span>\n<\/span>\n# Classes Colleague concretas<\/span><\/span>\nclass<\/span> <\/span>ConcreteColleague1<\/span>(<\/span>Colleague<\/span>):<\/span><\/span>\n    <\/span>def<\/span> <\/span>enviar_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>mediator<\/span>.<\/span>enviar_mensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>self<\/span>)<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>receber_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>print<\/span>(<\/span>"<\/span>ConcreteColleague1 recebeu a mensagem:<\/span>"<\/span>,<\/span> mensagem<\/span>)<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>ConcreteColleague2<\/span>(<\/span>Colleague<\/span>):<\/span><\/span>\n    <\/span>def<\/span> <\/span>enviar_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>self<\/span>.<\/span>mediator<\/span>.<\/span>enviar_mensagem<\/span>(<\/span>mensagem<\/span>,<\/span> <\/span>self<\/span>)<\/span><\/span>\n<\/span>\n    <\/span>def<\/span> <\/span>receber_mensagem<\/span>(<\/span>self<\/span>,<\/span> <\/span>mensagem<\/span>):<\/span><\/span>\n        <\/span>print<\/span>(<\/span>"<\/span>ConcreteColleague2 recebeu a mensagem:<\/span>"<\/span>,<\/span> mensagem<\/span>)<\/span><\/span>\n<\/span>\n# Exemplo de uso<\/span><\/span>\nif<\/span> __name__ <\/span>==<\/span> <\/span>"<\/span>__main__<\/span>"<\/span>:<\/span><\/span>\n    <\/span># Cria o Mediator<\/span><\/span>\n    mediator <\/span>=<\/span> <\/span>ConcreteMediator<\/span>()<\/span><\/span>\n<\/span>\n    <\/span># Cria os Colleagues<\/span><\/span>\n    colleague1 <\/span>=<\/span> <\/span>ConcreteColleague1<\/span>(<\/span>mediator<\/span>)<\/span><\/span>\n    colleague2 <\/span>=<\/span> <\/span>ConcreteColleague2<\/span>(<\/span>mediator<\/span>)<\/span><\/span>\n<\/span>\n    <\/span># Define os Colleagues no Mediator<\/span><\/span>\n    mediator<\/span>.<\/span>set_colleague1<\/span>(<\/span>colleague1<\/span>)<\/span><\/span>\n    mediator<\/span>.<\/span>set_colleague2<\/span>(<\/span>colleague2<\/span>)<\/span><\/span>\n<\/span>\n    <\/span># Envio de mensagens<\/span><\/span>\n    colleague1<\/span>.<\/span>enviar_mensagem<\/span>(<\/span>"<\/span>Ol\u00e1, como voc\u00ea est\u00e1?<\/span>"<\/span>)<\/span><\/span>\n    colleague2<\/span>.<\/span>enviar_mensagem<\/span>(<\/span>"<\/span>Estou bem, obrigado!<\/span>"<\/span>)<\/span><\/span>\n<\/span>\n# Fonte: ChatGPT<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
Neste exemplo em Python, temos um Mediator concreto (ConcreteMediator) que atua como intermedi\u00e1rio entre os Colleagues ConcreteColleague1<\/code> e ConcreteColleague2<\/code>. Quando um Colleague envia uma mensagem, o Mediator recebe a mensagem e repassa para o outro Colleague. Dessa forma, os Colleagues se comunicam de forma indireta, evitando o acoplamento direto entre eles.<\/p>\n\n\n\n
Mediator Pattern em Contextos de Neg\u00f3cios<\/h2>\n\n\n\n
No contexto de neg\u00f3cios, o Mediator Pattern<\/em> pode ser um aliado valioso na transforma\u00e7\u00e3o digital e inova\u00e7\u00e3o de produtos e servi\u00e7os, proporcionando uma arquitetura mais robusta, flex\u00edvel e escal\u00e1vel.<\/p>\n\n\n\n
Desafios e Cuidados ao Implementar o Mediator Pattern<\/h2>\n\n\n\n
Embora o Mediator Pattern<\/em> tenha muitos benef\u00edcios, tamb\u00e9m tem suas armadilhas. Por exemplo, um mediador mal projetado pode se tornar um ponto \u00fanico de falha ou um gargalo de desempenho. Portanto, \u00e9 crucial que o design<\/em> e implementa\u00e7\u00e3o do mediador sejam bem pensados.<\/p>\n\n\n\n
Conclus\u00e3o: Integrando o Mediator Pattern em sua Estrat\u00e9gia de Software<\/h2>\n\n\n\n
O Mediator Pattern<\/em>, se bem aplicado, pode ser um componente chave na constru\u00e7\u00e3o de sistemas de software<\/em> robustos, flex\u00edveis e eficientes. Ele pode melhorar a efic\u00e1cia da comunica\u00e7\u00e3o entre objetos, promover a escalabilidade e facilitar a manuten\u00e7\u00e3o.<\/p>\n\n\n\n
Esse conte\u00fado \u00e9 parte do material disponibilizado para os participantes do meu grupo de estudos de\u00a0Padr\u00f5es de Projeto<\/strong>. Voc\u00ea quer participar desse grupo?\u00a0Clique aqui e veja como funciona<\/a><\/strong>.<\/p>\n\n\n\n
D\u00favidas Frequentes<\/h2>\n\n\n\n
O que \u00e9 o Mediator Pattern<\/em>?<\/strong>
O Mediator Pattern <\/em>\u00e9 um padr\u00e3o de projeto que facilita a comunica\u00e7\u00e3o entre objetos em um sistema, atuando como um intermedi\u00e1rio entre eles.<\/p>\n\n\n\n
Quais s\u00e3o os principais benef\u00edcios do Mediator Pattern<\/em>?<\/strong>
Os principais benef\u00edcios do Mediator Pattern<\/em> incluem flexibilidade e modularidade, facilidade de manuten\u00e7\u00e3o e escalabilidade do sistema.<\/p>\n\n\n\n
Em que tipo de sistemas o Mediator Pattern<\/em> \u00e9 comumente usado?<\/strong>
O Mediator Pattern<\/em> \u00e9 comumente usado em sistemas onde h\u00e1 muitos objetos que precisam interagir, como interfaces gr\u00e1ficas, simula\u00e7\u00f5es e sistemas de fluxo de trabalho.<\/p>\n\n\n\n
Como o Mediator Pattern<\/em> pode beneficiar os neg\u00f3cios?<\/strong>
No contexto de neg\u00f3cios, o Mediator Pattern<\/em> pode ser um aliado valioso na transforma\u00e7\u00e3o digital e inova\u00e7\u00e3o de produtos e servi\u00e7os, proporcionando uma arquitetura mais robusta, flex\u00edvel e escal\u00e1vel.<\/p>\n\n\n\n
Quais s\u00e3o os desafios ao implementar o Mediator Pattern<\/em>?<\/strong>
Embora o Mediator Pattern<\/em> tenha muitos benef\u00edcios, tamb\u00e9m tem suas armadilhas. Por exemplo, um mediador mal projetado pode se tornar um ponto \u00fanico de falha ou um gargalo de desempenho.<\/p>\n","protected":false},"featured_media":5955,"parent":0,"template":"","cursos":[7],"class_list":["post-5916","artigos","type-artigos","status-publish","has-post-thumbnail","hentry","cursos-gof"],"acf":[],"_links":{"self":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/artigos\/5916","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/artigos"}],"about":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/types\/artigos"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/media\/5955"}],"wp:attachment":[{"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/media?parent=5916"}],"wp:term":[{"taxonomy":"cursos","embeddable":true,"href":"https:\/\/elemarjr.com\/clube-de-estudos\/wp-json\/wp\/v2\/cursos?post=5916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}