Microservice is an architectural style that can be implemented during complex application development within an organization. The implementation of this architecture allows the application being developed to be highly maintainable and testable, loose, independent during deployment and also strongly organized around business capabilities. In another way, the microservice architecture can be explained quite easily. It is a software development technique that allows for the structuring of an application. The structure of the application being considered will be that of a set of coupled services.
Any application developed using the microservice architecture is easy to understand, develop and test. More so, the application will have a sort of rigid attitude to degradation in the long run. This is due to the concept adopted during design.
The design of the microservice architecture ensures that applications are separated into smaller services, states, etc., until they become fine-grained and light in weight. Therefore, the modularity achieved encourages the adoption of methodologies that will allow for the division of labor. These methodologies will aid in the concurrent design, development and testing of the sub-services independently.
While this architecture is suited to certain scenarios, it (like every other architectural style) has its demerits. Microservice experts advise on the study of the architectural platform before adoption. The implementation of the microservice architecture can be affected by a number of programming languages.
Within the context of this article, I discuss the purpose of the microservice architecture, and also examine the upside and the reasons why they should be learnt and implemented. I also take a look at particular niches that allow the use of microservice architectures and why they use it.
Architecture, Examples and Types of Microservices
The microservice architecture is a major decomposition of the monolithic architectural method. The monolithic architecture had applications developed from the top to bottom and also had the entire development process run as a single unit. The microservice architecture works in contrast to this by enabling modularization. The core of the microservice architecture has requirements that are intensified and made possible by the separation of the primary task into smaller services, in which one service represents just a requirement, function or need.
Examples of microservice architectures can be found in airline service scenario. If we pick out the flight booking component, we could find out that this primary task could be separated into inventory adjustment, seat allocation, fare calculation, timetable lookup, reward management and customer update.
Research has it that the majority of the companies that make use of microservices are quite on the high side. This majority includes organizations such as Netflix, eBay, Amazon, PayPal, Twitter, The Guardian, etc. This list also includes the United States Government Digital Service.
The application of microservices can work with a number of technologies but a number of researches attribute effective usage of this architecture with the cloud environment and the DevOps environment as well. These tools and environments help to manage the operational complexities that affect the swift functionality of the architecture.
Why Do They Use It?
Most of the organizations that make use of the microservice architecture did transcend from the monolithic method. This is mostly because the method offers organizations the ability to decompose primary applications into smaller composed pieces. These pieces can then be built independently (which is easier) and also maintained independently as well. Developed pieces have the ability to communicate with each other and work together as well.
The adoption of microservice architecture provides the management of an organization and everyone involved in the development of the application with a decentralized approach towards building the software. This approach breaks the development process into a series of deploy, rebuild and redeploy.
The choice of a microservice architecture also grants organizations the ability to implement variant strategies, tools, techniques, etc., for services that are involved. Studies show that organizations that implement this architecture have a high proficiency rating. This is due to the usability of the architecture in independency, deployment, replacement, etc.
The architecture encourages easy debugging of errors and detection of faults in general. When an error is spotted, the segment from which it originated can be easily traced and the fault can be found shortly after. This, as explained earlier, is because primary tasks are separated into smaller services. Each service can then be fine-grained to simple state. Before the simple state is attained, it is also possible that the service can be separated into a smaller group of services. This option helps the development team actualize a major concept within this architecture, which makes sure that a service handles just one task. Also, the architecture allows for the adoption of management techniques that assist the organization. These management techniques include options such as change management process, continuous software development processes, problem and incident management techniques, etc.
Benefits to Using Microservices
The benefits to using the microservice architecture include:
- The actualization of scalability when considering customer-focused services.
- Independent deployment of services.
- The ability to work with more than one development tool (such as programming languages).
- Easing the modularization of tasks within the project as a whole due to the modularization of the application being developed.
- Support for a wide range of platforms and devices such as web, mobile, internet of things, etc.