Harnessing Microfrontends Platforms for Web Apps | Venkata Sai Manoj Pasupuleti | Conf42 PE 2024
Break down complex applications into smaller, self-contained units to boost scalability, reliability, and efficiency.
My name is Inai Possibility, and today I'm going to talk about harnessing microfrontends for building scalable, reliable, and secure applications. In today's fast-paced digital environment, building scalable, reliable, and secure platforms for complex work applications is crucial. As these applications continue to grow in complexity, traditional monolithic architectures often struggle to keep up, leading to slower development cycles, scalability challenges, and a higher risk of system-wide failures. Microfrontends, today's topic, offers a solution to this problem by breaking down these monolithic applications into smaller, self-contained units, with each unit having its own independent lifecycle. This modular approach not only simplifies development and maintenance but also enhances scalability, enabling teams to work more autonomously and efficiently. Today, we'll deep dive into microfrontends, where we'll understand their core principles, explore their advantages, and discover how they will empower us to build scalable, reliable, and maintainable web applications.
Firstly, let's start with the challenges of the existing web applications with monolithic architecture. If you see on this slide, on the right-hand side, you'll see a monolithic architecture-based application where you have the centered layer, the web application layers, and the integration layer. The integration layer is typically your graph layer, and the service layer is typically your Node.js or Java Spring Boot application, or any Python or Rust-based application that's out there. In a monolithic application, what happens is all these three layers are combined into one particular application and then distributed, scaled, and deployed across.
Let's try to understand the limitations of this traditional monolithic architecture, particularly as these kinds of applications continue to grow in complexity. The challenges highlighted below will show why we need to move towards microfrontends and why it is necessary.
The first challenge is tightly coupled code bases and scaling issues. In monolithic architecture, the front end, back end, and the integration layers are often intertwined into one single code base. This tight coupling makes it difficult to scale the individual components. For example, if the back-end layer (e.g., Node.js or Spring Boot application) starts to see more application load due to an increased number of requests or more complex logic, you typically deploy more instances of this application. However, in this case, you can't deploy just the back-end layer independently; you will have to deploy the entire application. This approach is not just inefficient but also risky, as it introduces unnecessary complexity and potential points of failure during deployment.
The second issue with monolithic architecture is the slow development and deployment cycles. For example, imagine onboarding a new team member. For them, understanding the monolithic system can be daunting because they need to get a complete grasp of the entire application before they start contributing effectively, which slows their productivity. Additionally, the complex nature of the codebase means that changes in one area, for example in the UI area, often require comprehensive testing across the entire application. For instance, if you want to deploy a small UI update, you can't do it in isolation; you'll have to test the entire application from the front end, through the integration layer, to the back end before you go ahead and deploy. This delays the time to market for any feature.
The third main issue with monolithic architecture is the cascading failures. For example, in a monolithic architecture, a small change or a small bug in one part of the application can cause unexpected issues elsewhere. If there is a minor bug in the authentication module, there is a very good chance it could affect the user dashboard somewhere else. This leads to cascading failures, and it often gets very difficult to find out where exactly the root cause of the problem is.
Monolithic architectures slow down development and deployment; micro frontends offer a modular, scalable solution for faster, independent feature releases.
Updating an application cannot be done in isolation; you'll have to test the entire application from the Front End, through the integration layer, to the back end layer before you can deploy. This delays the time to market for any feature. The third main issue with monolithic architecture is the casting failures. For example, in a monolithic architecture, a small change or a small bug in one part of the application can cause unexpected issues elsewhere. For instance, if there is a minor bug in the authentication module, there is a very good chance it could affect the user dashboard somewhere else. This leads to casting failures and it often gets very difficult to find out where exactly the root cause of the problem is. The lack of modularity increases the risk of system outages and makes troubleshooting very challenging.
Another main issue with monolithic architecture is the lack of flexibility of technology. In this architecture, you often lock yourself into specified technologies or frameworks across the application, which can be limiting. For example, if you want to use a different technology or a different version of a given library for part of your application, it becomes very difficult because you are tied to a given technology framework and version across the app.
Additionally, team coordination challenges arise as the team continues to grow. Coordinating development within the team in a monolithic architecture becomes very difficult. Teams working on different features often get stuck on each other's toes, leading to merge conflicts in CI/CD pipelines and overall slow progress. This lack of ownership and modularity can hinder a team's autonomy and reduce developer velocity.
Based on these challenges, it's clear that we need a more modular, flexible, and scalable approach to build modern web applications. Microfrontends come to the rescue by enabling teams to develop, test, and deploy independent modules, leading to faster delivery, reduced risk, and enhanced scalability.
Microfrontends are a game changer when it comes to building scalable, reliable, and maintainable web applications. Their effectiveness lies in a core set of principles that define how we approach modern development. For example, the same monolithic application can be broken down into three different applications. Let's take Amazon as an example, which uses microfrontends in its application. Instead of building and deploying the entire Amazon application as one big application, they have independent apps. For instance, the cart experience is managed by a separate team that might use React on the front end and Java at the back end. Similarly, the main Amazon.com web page and the payment team are managed by different teams.
Microfrontends allow teams to work on different parts of the application independently and deploy them. This results in independent scalability and deployability. One of the greatest assets of microfrontends is their ability to operate independently, allowing each microfrontend to be developed, tested, and deployed separately. This enables teams to release new features without impacting other parts of the application. It feels like a well-choreographed dance where each team moves in sync with others without stepping on each other's toes, resulting in faster, smoother, and more frequent deployments.
Additionally, microfrontends lead to smaller code bases for faster development. By breaking down a huge monolithic application into smaller, manageable pieces, microfrontends reduce the complexity of the overall codebase. This approach enables faster development as teams can focus only on their specific microfrontend without being bogged down by the entire application.
Micro frontends are like a well-choreographed dance, allowing teams to develop, test, and deploy independently for faster, smoother, and more resilient releases.
Operating independently, each microfrontend can be developed, tested, and deployed separately. This allows teams to release new features without impacting others. It feels like a very well-choreographed dance where each team moves in sync with others without stepping on each other's toes, resulting in faster, smoother, and more frequent deployments.
Additionally, microfrontends consist of smaller code bases, which facilitate faster development. By breaking down a huge monolithic application into smaller, manageable pieces, microfrontends reduce the complexity of the overall codebase. This approach enables faster development as teams can focus only on their specific microfrontend without needing to understand or test the overall system for making a deployment. This means that you can ship newer features very fast and significantly improve the time to market.
Another advantage of microfrontends is their resilience and fault tolerance. One of the core features is complete decoupling. By decoupling different parts of the application, microfrontends inherently build resilience and fault tolerance. For example, if one component fails, such as the cart or search functionality, it doesn't bring down the entire website. If there is an issue with the payment system, users can still browse products and add them to the cart, even if they cannot check out. This reduces the system risk of total system downtime and enhances overall system robustness.
Technology agnosticism is another benefit. Individual teams can choose the best tool for their job. For instance, the Amazon homepage team might prefer React due to its rendering capabilities, while the payment team might opt for Vue.js. This approach allows teams to leverage their expertise and choose the technology they are most comfortable with, without being tied to a specific technology or version.
Finally, microfrontends offer scalability at every level, not just in terms of technology but also in team structure. As your application team grows, you can scale your teams, each focusing on different microfrontends without the risk of creating a monolithic structure. This distributed approach to development allows your organization to grow more organically, accommodating larger teams and building more complex applications without sacrificing performance or agility.
When developing microfrontends, it is essential to keep in mind the best practices, architectural patterns, and challenges. One of the first choices is whether to split your monolithic application vertically or horizontally. Vertical splitting means that each team owns both the frontend and backend services for a specific part of the application, such as the homepage, cart page, or payment system. Horizontal splitting, on the other hand, involves one team owning the entire UI and another team owning the entire API. Typically, vertical splitting is more common across the industry, as seen in companies like IKEA or Spotify, where individual teams maintain both their frontend and backend layers.
Micro frontends break down large web applications into smaller, independent units, allowing for faster development, scalability, and a cohesive user experience.
Let's consider an e-commerce website as an example. It typically shows you a list of products, allows you to check out with a cart, and manages the payment. One way of splitting it vertically would mean that the entire homepage is owned by one team, the entire cart page by another team, and the entire payment page by yet another team. Each team would own both their front-end and back-end services.
Horizontal splitting, on the other hand, would mean that one team owns the entire UI, while another team owns the entire API. However, vertical splitting is more commonly seen across the industry. For instance, at Ikea or Spotify, individual teams maintain both their front-end and back-end layers for specific functions. Similarly, at Amazon, the homepage team would own both the UI and API, the cart team would own both the UI and API, and the payment team would own both the UI and API. This is an architectural pattern they have chosen.
When implementing micro frontends, it's crucial to establish clear communication and contract boundaries and ensure well-defined APIs for communication between micro frontends. This avoids tight coupling and allows for independent iteration as long as these contracts are adhered to.
One challenge in micro frontends is communication and state management. In a monolithic application, components can easily communicate with each other. However, in a micro frontend architecture, where components are separate applications, it's not straightforward. Therefore, well-defined APIs and event-driven architectures are necessary to manage interactions. Tools like event buses, global state managers, or microservices can help facilitate this communication.
Another challenge is maintaining consistency in user experience. Different teams working on different parts of the UI must ensure that all experiences are cohesive and feel like they belong to the same web application. Establishing a comprehensive design system and enforcing UI/UX guidelines across all micro applications can help maintain this consistency. Shared libraries of user components can also ensure that the web page feels unified, even if it's powered by multiple micro frontends.
Security is another important consideration. With different teams and developers working on various applications, ensuring consistent security practices across the entire application is crucial. A unified strategy that includes secure communication, consistent authentication, and authorization practices is necessary. Each micro frontend should adhere to the same security standards to avoid vulnerabilities.
Micro frontends help break down large monolithic web applications into smaller, independent units, allowing for modularity and scalability. The key benefits include independent scalability, where teams can develop, test, and deploy micro frontends independently, leading to faster release cycles and better scalability. Faster deployment cycles result from smaller codebases, enabling rapid feature updates. Reliability is enhanced as issues in one micro frontend do not affect the entire application. Technology agnosticism allows teams to use different technologies for different micro frontends, promoting flexibility and innovation.
When designing micro frontend applications, it's essential to choose the right architecture pattern, whether vertical or horizontal splitting. Establish clear communication methods, define API contracts, and maintain shared libraries for consistency. Ensuring a cohesive user experience is crucial so that the web page does not feel like different applications stitched together. Real-world examples of companies using this methodology include Spotify, Amazon, and Ikea.
In conclusion, micro frontends offer a powerful approach to building scalable, maintainable web applications but require careful planning and execution. Embrace modularity, leverage best practices, and address challenges proactively to maximize the benefits of micro frontends. Thank you for taking the time to join me today to discuss this micro frontend-based architecture.