Introduction to Java Microservices

Basically, microservices are nothing but a set of applications that are written in Java language, or we can say that typically java tools and framework. Microservices are normally designed for the specified scope, and interact with each other with high availability. Each microservice has limited capabilities while we are creating the architecture. The architecture of microservice is analogous so we need to assemble it to get the desired result.

Key Takeaways

It is a small java application, so each microservice is independent of the other.
It collaborates with the agile process, so we can do a fast iteration of the sprint and try to fix the bugs.
It also helps us to reduce the cost due to the agile process.
It provides scalability architectures to the developer.

What are Java Microservices?

Java microservices are a group of programming applications which is written in the Java programming language (and regularly influence the huge useful system of different Java tools and framework), intended for a restricted scope that works with one another to shape a greater arrangement. Every microservice, as the name infers, has negligible capacities for making a very modularized, generally creating module or architecture. A microservices design closely resembles an assembling sequential construction system, where every microservice resembles a station in the mechanical production system.

Similarly, as each station is liable for one unambiguous errand, a similar turnout as expected for microservices. Each station and microservice are “specialists” in their given liabilities, in this way advancing effectiveness, consistency, and quality in the work process and the results. Contrast that to an assembling climate in which each station is liable for building the whole item itself. This is comparable to a solid programming application that plays out all errands inside a similar cycle.

How does Java Microservices Work?

Before going on to the execution, we must know what microservices is? we have already discussed in the above point. We know that each microservices executes a specific task and the scope of this task is limited which helps us for the result.

Each microservices is nothing but the set of standard deviations which contains the data set. The advantage of microservices is that planning and distinction between the different tasks and finally developed applications determine each subtask and execute accordingly. During the execution of microservices, each microservice needs to send output to the next microservice.

Java Microservices Frameworks

Different java-based frameworks are available for creating Java microservices, so let’s see them one by one as follows.

Spring Boot: It is the most popular framework used to create microservices or we can say that java application due to simplification, easy configuration, and security application. With this framework we can create microservices easily and iterate fast, this is one of the reasons for spring boot.
Jersey: This is another java-based framework that is used for creating microservices. Basically, it is used for the REST web services, and this is one of the communication layers between the microservices.
Swagger: This is used to create APIs; it is also a Java base, and this is one of the communication layers between the microservices.

Architecture of Java Microservices

Basically, microservices provide the independent space to the developer as well as administration to build microservices design as per our requirement. A variation of primary style design orchestrates applications as an inexactly coupled help assortment. Microservice Engineering contains fine-grained administrations and lightweight conventions. We know that microservices are created for a single requirement of the application and it is communicated to each other to generate the final result sets.

Let’s see an e-commerce application:

We realize that for any e-commerce business application, there are a few standard highlights like Inquiry, Survey and Evaluations, and Installments. At that point when the designer of the Web-based business webpage conveys the application, it is a solitary Solid unit. The code for various elements like Pursuit, Survey and Appraisals, and Installments are on a similar server. To scale the application, you want to run various instances (servers) of these applications.

Benefits of Java Microservices

Given below are the benefits mentioned:

Basically, there are many advantages we have when we use microservices, some advantages are with respect to the developer’s point of view, which means how they can write good quality code.
We know that microservices is nothing, but a small-scale java application, and it is based on the problem domain which we need to implement as well. It also helps us to follow the agile process, so they can be able to do fast iteration as well as determine the new features within the specified schedule.
It helps the developer to resolve bugs immediately, so it minimizes the cost and less bugs.
Microservices are small applications, so they communicate with each other. That means microservices are independent and the most important benefit is that developers can use any programming language to develop microservice.

Example of Java Microservices

In the above point we can see how to use microservices with different frameworks, so here let’s see an example with spring boot as follows.

Code:

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;
@RestController
@EnableAutoConfiguration
public class sampledemo {
@RequestMapping("/")
String index() {
return "Sample demo project will be done";
}
public static void main(String[] args) {
SpringApplication.run(sampledemo.class, args);
}
}

Output:

Explanation:

In the above code, we try to implement the microservice in spring boot, the result is shown in the below screenshot.

FAQ

Given below are the FAQs mentioned:

Q1. Is Java suitable for microservices?

Answer: The answer is yes because java is the most popular programming language and we can easily develop microservices in java. Basically, java provides the annotation syntax to the developer.

Q2. How and what types of microservices are present in Java?

Answer: There are 3 different types of microservices such as discovery server, authentication service, and consumer microservice which is used for the client.

Q3. Which is the best framework for microservices implementation?

Answer: There are different types of frameworks available to implement microservices such as spring boot, quarks, eclipse, and ballerina.

Conclusion

In this article, we saw what Java microservices are, as well as we also saw some basic key ideas of Java microservices with configuration. We also saw the uses and features and how we can use them.

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