Why spring framework

Struts MVC Framework solved that problem. Spring MVC came later. With Javascript MVC frameworks, you build your web pages separate from your server logic. For all my projects that involved web development, I have used Spring Security. A two-minute introduction is below. You can tell it that all URLs with a specific pattern e. You can also add annotations on the java methods to make them secure. I will discuss this in length in a future post.

Spring Security provides both authentication as well as authorization. When starting a fresh project, I integrate spring security and use in-memory authentication. In-memory authentication premise is simple. You hard code a bunch of username, password, role combination into a file or within your XML or java code.

Spring Security would then let you in using either one of them and give you the role for that user. This helps developers continue with the application development. Later, you could plug in a different authentication provider. And there are no code changes to the business logic as a result of this.

Most projects I have worked with pull credentials from database tables. Once the database is available, we switch to a database authentication provider.

For one of my other projects, our users were database schema owners. Spring security supported custom authentication where we had to proxy as database users. One of the projects used Spring JPA while the others were direct hibernate calls.

It is a way to represent your tables into java objects and vice versa. Hibernate is the most popular ORM Framework. One of the projects used myBatis instead of Hibernate. Let Spring handle your database transactions as well. Hibernate expects your procedure in a certain way. If you are starting a new project, I would recommend using Spring Data. It sits on top of Spring ORM. They come built-in. I will explain this in a future post.

I have worked at two projects where the database queries would take hours to finish. I will explain the reason below in a second. For one, Your browser requests will die based on the application server settings. For instance, tomcat has a default setting of 30 minutes before timing out user request. One of the projects had accounting updates to make to millions of rows. Here we used Spring Batch. In this case, our web request would kick off a Spring Batch Job and immediately return with a Job Id.

So the user is not waiting. I can then use the job id to check the status of the job and keep the user updated of the progress. This could be an email notification to the user. Or these days, you could leverage web sockets to push any notification to the user while he is still online. Spring Batch also provides you a way to notify a system in case of status changes. So you could tell Spring Batch to update a row in the database or send an email once the job status changed. The possibilities are endless here.

The second project had reporting data to pull from a massive datamart. The reporting tool we used handled it for us. But the concept was the same with it running async and handing us an id.

Spring Batch does not make things fast. But it will ensure data integrity and consistency in your job. You can tell it to retry a job X number of times if it fails. You could tell it how to handle failures. In one of my projects, Our client would send us reports as XML files via web services. These XMLs were small, but there was no definite way to tell when these files would come in.

We had k XML files come in six months on average. We used Spring Integration for this task. We set up a file poller for the directory of incoming files. Once the file came in, the event would get triggered. We would then push it through our workflow. The code to handle the incoming file would stay separate from the rest of the workflow.

This kept the external party dependency away from the rest of the system and made testing easy. I once worked on a Struts 1. They needed to perform some clean up of the data for their testing environment on a regular basis. I learned more about the project and data structure via this effort than from few months code sifting.

I worked on a product that was a standalone CLI command line interface sold to clients. It was Java based business rules engine with heavy XML parsing. So, I introduced Spring Framework in a test package within the project. Going back to the Spring Batch project. The application was using Spring Framework and its different modules already. But an external team needed to kick off these batch jobs from their end on their own schedule.

It was the same job that we were calling from our web application. It was the same codebase. The external team could call this executable nightly or whenever now. With the introduction of Spring 5. These are as follows:. In web improvements, unified support for media type resolution is provided using MediaTypeFactory. Also, the full Servel 3. With the introduction of this version, major changes are made to the testing environment of the Spring framework.

Hence, in this Spring framework tutorial, you have seen the various Spring framework features. Also, the new upgrades in the testing environment, web services, and XML-related code add to the latest features of the Spring 5.

Still, if you have any doubt, leave a note in the comments section below! Published at DZone with permission of Rinu Gour. See the original article here. Thanks for visiting DZone today,. Edit Profile. Sign Out View Profile.

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Join For Free. Spring Framework Features Spring is a powerful, lightweight framework used for application development. But, it had several problems, including: Code became very complicated as application progressed.

Performance of the system got affected due to the heaviness of the applications. The look-up problem of the component. Spring provides a consistent transaction management interface that can scale down to a local transaction using a single database, for example and scale up to global transactions using JTA, for example.

The Inversion of Control IoC is a general concept, and it can be expressed in many different ways. Dependency Injection is merely one concrete example of Inversion of Control. When writing a complex Java application, application classes should be as independent as possible of other Java classes to increase the possibility to reuse these classes and to test them independently of other classes while unit testing.

Dependency Injection helps in gluing these classes together and at the same time keeping them independent. What is dependency injection exactly? Let's look at these two words separately.

Here the dependency part translates into an association between two classes. For example, class A is dependent of class B. Now, let's look at the second part, injection. All this means is, class B will get injected into class A by the IoC. Dependency injection can happen in the way of passing parameters to the constructor or by post-construction using setter methods. As Dependency Injection is the heart of Spring Framework, we will explain this concept in a separate chapter with relevant example.