Different software architectural patterns and how to choose the right one for your app

Once you have an app idea and you planned to create an application, the next step is to decide the right software architecture for your mobile application. 
Don’t know about software architectural patterns?  Well, the architectural pattern is a readymade solution to a wide range of problems occurring in software architecture. 
Let’s first list down the different architectural patterns.

• Layered pattern
• Client-server pattern
• Master-slave pattern
• Broker pattern
• Model-view-controller pattern

#1 Layered pattern

Layered architecture pattern is the most widely used pattern for medium scale projects like a desktop application or E-commerce web applications. Basically, as the name suggests this pattern components are divided into different layers and each layer is responsible for a particular task. Each layer has given a specific role for which it will be responsible for. Most of the scenarios, it is divided under below 4 below layers

• UI layer or presentation layer
• Service layer or application layer
• Domain layer or business logic layer 
• Persistence layer or data access layer

Layered architecture pattern is suitable for

• Small or medium size of apps which should be developed quickly.
• Large scale applications like enterprise or business apps that required minor IT department and processes.

#2. Client-server pattern 

As the name suggests, client-server pattern is divided into 2 modules, a server and clients. The client can be single or multiple but there will be single server who attends all the client’s request. 

Let’s take an example to get more idea about this pattern. When a bank customer accesses the bank services either via mobile or browser or via tablet, there will be a single server who accept all the request and attends the customers. The client-server pattern is suitable for

• Online application like email, banking or file sharing like google drive.

#3. Master-slave pattern

It is Similar to client-server pattern, master-slave pattern is divided under 2 modules called master and slave. There could be one or multiple slaves but there will be a single master. The role of the master is to distribute work among the workers and calculate the final result from the results returned by slaves. 

This patterns very advantageous when creating multi-task applications. 
Master-slave pattern is suitable for 

• Developing multi-threaded applications like messaging apps 

#4. Broker pattern

Broker pattern is structured distributed system in which the components communicate broker(remote service invocation). A broker component is responsible for all communication between the client and the server. A broker communicates with the server about the requests from the client and also returns the result from the server to the client. 

A simple example is we develop APIs during mobile app development project and API act as a broker which pass the data/request between client-server and server-client.
Broker pattern is suitable for 

• Messaging apps (Chat app development)

#5. Model-view-controller pattern

Model view controller pattern which is widely known as MVC pattern. It is divided into 3 different modules called Model, View and Controller.

• Model is responsible for core functionality and transmit the data from or to the database. 
• View is responsible for displaying the content to users.
• Controller is responsible for handing user input and perform the actions using model and display information to users using the view.

MVC pattern is suitable for 

• Medium or large application uses the MVC architecture.  MVC pattern is mostly used in the mobile app development process.

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