Testing Strategies in a Microservice Architecture

A monolithic application is built as a single and indivisible unit. Usually, such a solution comprises a client-side user interface, a server side-application, and a database. It is unified, and all the functions are managed and served in one place. It is extremely problematic to apply a new technology in a monolithic application because then the entire application has to be re development.

Why monolithic architecture is better than microservices

SOA is organized on larger and more modular services than microservices that are centered on a single function. In addition, the Service-Oriented Architecture shares data storage space while each microservice has its own independent data storage. He’s known in the development community as a speaker, lecturer, author and baseball expert. His current role allows him to help the world understand the challenges they are facing with cloud native observability…. 2 Each service is a separate codebase, which can be managed by a small development team. Wells Fargo is a financial institution that relies on a monolithic architecture for its website and mobile app.

It is extremely problematic to apply cutting-edge technology in a monolithic application because then the entire software has to be rewritten. Cross-cutting concerns are the concerns that affect the whole application such as logging, handling, caching, and performance monitoring. In a monolithic application, this area of functionality concerns only one application, so it is easier to handle it. Transaction management in Monolith architecture is quite easy compared to Microservice Architecture. Many frameworks or languages contains some mechanism for transaction management.

Easy to scale

This makes it easy to understand and maintain but difficult to add or remove services without affecting the entire application. Wells Fargo’s monolithic architecture can handle this load easily thanks to its modularity. All code is accessible from a single entry point, making it easy to modify or replace individual modules without affecting the rest of the application. This makes it possible to test and deploy new features quickly and efficiently. Improved scalability – A microservices architecture can handle increases in traffic or load more easily than a monolithic bulky. This is because each service can be scaled independently, as needed.

Why monolithic architecture is better than microservices

Having one CI configuration vs many, the one is easier to maintain. Due to its bulky size and higher dependencies, build and deploy mechanisms in monoliths are more complicated and time-consuming. Microservices are less resource-sensitive and are built to scale.

This communication could involve a process letting another process know that some event has occurred or transferring of data from one process to another. As you can see that we only use method calls for communication in monolithic architectures. As you know that, monolithic application sitting in the same server with all modules. So it is very easy and fast to communicate between modules of our E -Commerce Monolithic Application. You also should separate the responsibilities of your applications and the responsibilities from the layers of the systems. Most systems work best if they are kept simple rather than making them complex designs; therefore, simplicity should be a key goal in design and unnecessary complexity should be avoided.


In this part we are going to design our e-commerce application with the monolithic architecture step by step. We will iterate the architecture design one by one as per requirements. Planning to create an app, you should solve several basic organizational and technical problems, one of the most serious of which is choosing the architecture type.

Why monolithic architecture is better than microservices

All application concerns are contained in a single big deployment. Even the monolithic applications can design in different layers like presentation, business and data layer and then deploy that codebase as single jar/war file. For startups looking to build a simple app with minimum features and scalability, monolithic architecture is the best fit. Contrarily, for enterprises wanting a custom app with complex structure and scalability, development companies offering microservices expertise is the best choice.

Susceptible to software vulnerabilities

If developers want to update or change something, they access the same code base. Unfortunately, the monolith architecture has lots of disadvantages, we can say that; It becomes too large in code size with time that’s why its really difficult to manage. Hard to implement new features on legacy big monolithic applications. Any change, requires deploying a new version of the entire application.

If you own a full-fledged business and bargain for a scalable app with many modules, functions, and user journeys, you can bet big on microservices. Developers can create a complex app with more than just the basic features following the microservices architecture. Each app feature can be broken into individual components that are independently scalable. They can be further divided into small tasks that are deployable as a separate microservice.

Logistics Strong logistics expertise, high-quality software solutions, and end-to-end development. Knowing the pros and cons of both architectures, the question is which option is better for you? While I’m relatively new to the microservices world, I’ll try to answer your question as complete as possible. You should also remove the dependencies and other external factors affecting your build. Since monolithic software often has only one point of failure, any error or malware attack can crash the entire system. Even with rigorous testing, experienced QA specialists might struggle to find the source of this software failure.

Monolithic vs Microservices architecture

One of the benefits of monolithic architecture is that it allows for easy unit testing. Since all the code is contained in a single module, it can be easily tested in isolation. The application sends calls to the API, which informs the server to execute the request. Afterward, the server sends data back to the API, which sends it to the client’s application. This process experiences some latencies and thus slower compared to monolithic.

  • The individual codebase for each microservice enables developers to employ multiple technologies for each function in a single app.
  • Microservices architecture is designed to make application software development in a cloud native environment simpler, not more difficult.
  • The microservices have a particular job and are not dependent on other components.
  • After that we can split Client application, after that split the business logic and data access and last we split services components in monolithic application.
  • So, those who know about SOA, most think that they are the same, or the difference is not much clearer in their mind.
  • While it has many advantages, several factors could impact its popularity.
  • With over 2 billion active users, the site must handle enormous traffic.

Increased complexity – As an application grows, it becomes more difficult to manage and maintain. This is because a monolithic bulky breaks an application down into a single module, which can be difficult to understand and debug. In a monolithic application, swapping out modules is a relatively easy process. Since the application is a single entity, all code is accessible from a single entry point. This makes it possible to modify or replace individual modules without affecting the rest of the application. Unintended complexity happened from a few instants in monolithic codebases to distributed systems and services.

Services do not need to share same technology stack, libraries or frameworks. A home to software testing, electronics circuits & projects, tips and tricks and digital diary. As a communication system, SOA uses ESBs and microservices use APIs; for advantages of microservices over monolithic remote services, SOA uses protocols such as SOAP and AMQP, while microservices rely on REST and JMS. Community created roadmaps, articles, resources and journeys for developers to help you choose your path and grow in your career.

AWS Managed Services

The deployment, scalability, and updating is autonomous for each part. Also deploying the application is easier, since you are building the independent microservices separately and deploying them on separate servers. This means that you can build and deploy services whenever you like without having to rebuild the rest of your application.

Our Solutions

Testing between microservices and third-party services – In this case a service in the application consumes or interact with external API. In the above example we can think of a Payment for an order as microservice which interacts with UPI payment API. Beyond specific cases, it is important to consciously assess the challenges that microservices bring to the enterprise. Each feature can be scaled up quickly and deployed across multiple environments independently of the rest.

Independent, reusable components

Microservices are typically developed by small team working on different technologies and frameworks. Testing teams generally might be inclined to use web API based traditional testing approach. This may not be a good approach as all services may not be ready at the same time.

Yet, after the solution was used for several months, it appeared to be ineffective. It was hard for them to add new functionality and scale the monolithic platform. And scaling was essential as our client has many factories, warehouses, and suppliers, as well as a lot of raw materials and finished goods, which circulate among them. The core reason why the platform was not scalable and inefficient was its monolithic nature. In contrast to the microservices architecture, monolithic applications are much easier to debug and test. Since a monolithic app is a single big code base, you can run end-to-end testing much faster.

A lack of DevOps-style team coordination and automation will mean that your microservices initiative will bring more pain than benefits. Services exist as independent deployment artifacts and can be scaled independently of other services. The isolation of modules enables you to choose the most appropriate technology for each service—and they won’t contradict. In microservice software, individual modules are isolated from one another. Therefore, if one system component fails, the other application parts won’t stop working properly.

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