Emerging microservices and it features
Why microservices is an up and coming trend?
Microservices offer high scalability. One of the best things about microservices is that cloud instances are independent. Therefore, cloud platform and technology can be utilized to deploy them. You can take advantage of scalability of the cloud platform.
Singular, Robust and Supple - the best part about Microservices architecture is that it contains single business functionality, which means that even if one microservice fails, that service itself goes down and not the whole application.
If the monitoring service is utilized correctly, you can find it out very quickly and restart such microservice or have mechanism which would pass another microservices instance providing the desired functionality.
Furthermore, it's good practice to utilize a load balancing and scalability so that in case of heavy load it can be distributed to unused or new microservice instances.
Easy and swift Deploy
It works on the agile development methodology, which means you do not have to go through all the cumbersome pre-development procedures to incorporate new feature/functionality.
Easy and quick development
As we know that Microservice application is focused on one singular part of business, therefore it is easier to provide such service which encapsulates that requested logic. In case of development of this single logic, you don't have to deploy the whole monolithic application to see if the service is running as expected. All you need to do is to develop and deploy single functionality and write and run (unit) tests against it to make sure everything works, and interface it provides returns the desired results.
Now that we know that Java EE microservices are trend in way of development, we will now discuss its architecture.
What are Java EE microservices?
The current mobile and multipurpose requirement has changed our focus from heavyweight designs and infrastructures to the one that is supple designs. Now the wordy protocols and web interface design technologies are no revised from the application servers.
Microservices make use of simple routes and encase the logic to itself rather than using intelligent routing. There is no defined size even if the name indicates to one.
Microservices works as a platform for a singular business purpose. Microservices do not make use of full-fledged application server for effective runtime, even you need to push it harder to get comprehensive enterprise settings. A single microservice can be deployed as a single servlet or a JVM instance which can serve as the best environment for executing complex enterprise functionality.
Testing of Microservices architecture
How to test microservices-based on Java EE ? Testing microservices can be a challenging task as you need to test individual service and also the how they work together (integration testing). Following are the testing process that you need to adopt to test you Java EE microservices:
Testing microservices can be fragmented into the following principles:
Unit: As its name suggest a unit test if the smallest piece of testable software in an application to check whether this behaves as it was discussed.
Integration: An Integration test cross checks whether the interaction between the elements is working with the design interfaces or not.
Component: The main purpose of a component test is to find out the scope of the software to a part of the system that is under test and test the system through code interfaces. This can also be done by isolating the code from the components that surround you.
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