Microservices Architectures - Microservices vs SOA


Microservices architectures are very popular today. In this article, we take a look at how microservices architectures are different from Service Oriented Architectures (SOA).

Introduction to Cloud, Microservice - Challenges and Advantages

This is the last article in a series of five articles on cloud and microservices:

Deployability

Both Microservices and Service Oriented Architectures primarily talk about creating small services.

Whenever we talk of microservices, we refer to small sized services that are also independently deployable.

image info

For example, we should be able to release Microservice1 without affecting the behavior of any of the other microservices. We would be able to take such a microservice to production very quickly.

The focus of SOA might be on creating independent services, but not exactly independently deployable ones. In SOA, while we focused on API, the deployable units were generally large.

Thin Pipes v Enterprise System Bus

With the evolution of its architectures, SOA ended up having large Enterprise Service Buses (ESBs). ESBs were introduced to enable loose coupling between SOA components.

image info

In order to implement a new feature in an application, changes are needed both on the application logic, as well as in the enterprise bus.

The enterprise system bus become a central spoke where a lot of business logic also made its way. Over a period of time, these sucked in a lot of business logic, making the application difficult to maintain.

Microservices architectures keep minimum logic in the communication infrastructure - thin pipes.

Tied To XML

SOA was tied to the XML technologies, inheriting its formalities and complexities.

Governance

With SOA, there is always an centralize architecture team that decides what logic goes into an ESB, and what cannot, among other things.

On the other hand, microservices architectures focuses on having decentralized governance.

Let’s take an example

Consider a banking application. Along with a savings account, a customer gets a debit card for free. An Insurance Savings Account and a Debit Card are different banking products, managed by different product systems.

image info

SOA

In the SOA architecture, the ESB takes the order from the selling application, and handles the communication with the systems that create the appropriate products.

The ESB ends up having a lot of business logic, making it top-heavy.

Microservices

Typical microservices architecture makes use of an event driven architecture. It makes extensive use of a message queue to ensure reliable communication between different microservices, each having it own responsibility.

The sales app would create an order event, and put it in the queue. Each of the other services would look at the event, and process it if relevant to them.

Do check out our video on the same topic:

image info

Summary

In this article, we had a look at the differences between microservices architecture and SOA. We looked at independent deployability, de-centralized governance, and the event based nature of microservices architectures.

Congratulations! You are reading an article from a series of 50+ articles on Spring, Spring Boot , Hibernate, Full Stack, Cloud and Microservices. We also have 20+ projects on our Github repository. For the complete series of 50+ articles and code examples, click here.

Join 300,000 Learners!

Learn Spring Boot in 10 Steps - FREE Course

Next Steps

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Image

Related Posts

Spring Boot Tutorials for Beginners

At in28Minutes, we are creating a number of tutorials with videos, articles & courses on Spring Boot for Beginners and Experienced Developers. This resources will help you learn and gain expertise at Spring Boot.

Spring and Spring Boot Video Tutorials for Beginners

At in28Minutes, we are creating a number of tutorials with videos, articles & courses on Spring Boot for Beginners and Experienced Developers. Here's a list of video tutorials and courses for you

What is an In Memory Database?

In this article, we understand what the term "In-Memory Database" actually means. We see what scenarios they can be used, and why they are important.

What is an Embedded Server?

In this article, we focus in exploring what an embedded server is, and how they help make application deployment simpler.

Java Tools and Frameworks - Introduction To Maven

In this article, we experience a brief introduction to Maven, and will see how it helps in managing your project dependencies.

Five Tools To Learn as a Java Developer

In this article, we introduce you to five great tools that we recommend every Java Developer to learn.

Five Languages To Learn as a Java Programmer

As a programmer, you want to explore new things. Learning a new language gives you a different perspective when solving problems. What are the 5 languages that a Java developer should explore?

Five Great Frameworks To Try for Java Programmers

As a programmer you want to explore new languages and frameworks. What would be the best frameworks to explore in 2019 for Java Programmers?

Unit Testing Best Practices - with Java and Junit Examples

Unit Testing is often underrated. As far as I am concerned, having good unit tests seperates good projects from bad. In this article, let's look at unit testing best practices in depth. We use examples from Java and JUnit to illustrate the concepts. However, the best practices are applicable irrespective of the programming language used.

Programming Basics - Unit Testing - What Is Mocking?

Mocking is an important concept that is made use of, when writing unit tests. In this article, we explore what mocking is all about, and explore some of the popular Java mocking frameworks in use.