The Spring framework has emerged as a solution to all the enterprise app development complications. With this framework, you can use different techniques to utilize Aspect-Oriented Programming (AOP), dependency injection (DI), and Plain Old Java Object (POJO) for developing enterprise applications. This can help you remove all the major complexities while you involve different kinds of enterprise apps with the aid of EJB. You should be knowing that Spring is an open-source lightweight framework which would be allowing Java EE 7 developers when they want to build more reliable, simple, and more scalable enterprise applications.
Let’s understand what is the Spring framework clearly. Before the arrival of Enterprise Java Beans (EJB), many Java developers have always wanted to leverage JavaBeans when they want to create the best Web applications. Even Though JavaBeans has gone on to help everyone in the development process involving user interface (UI) components, everyone had a hard time providing services in the form of security and transaction management. This has helped everyone develop secure and robust enterprise apps. With the arrival of EJB, it was noted as a solution to all the problems related to enterprise and web components. This can also provide services for enterprise applications in a simpler manner. When you want to build the best enterprise application, it might not be easier with EJB. Every developer has to perform numerous tasks related to creating remote and home interfaces. This can also let you implement high-end lifecycle callback methods leading to different complexity related to EJBs. Owing to all these complications, every developer has started searching for alternate ways to develop the best enterprise apps. The spring framework acted as a solution to this. Let us understand what is Spring framework, Spring framework versions, and Spring framework dependency maven.
The spring framework mainly focuses on providing various ways to help you manage your business objects. It made the development of Web applications much easier as compared to classic Java frameworks and Application Programming Interfaces (APIs), such as Java database connectivity(JDBC), JavaServer Pages(JSP), and Java Servlet. The Spring framework can be considered as a collection of sub-frameworks, also called layers, such as Spring AOP. Spring Object-Relational Mapping (Spring ORM). Spring Web Flow, and Spring Web MVC. You can use any of these modules separately while constructing a Web application. The modules, along with Spring framework dependency maven, may also be grouped together to provide better functionalities in a Web application. The features of the Spring framework such as IoC, AOP, and transaction management, make it unique among the list of frameworks. The Spring framework provides two packages, namely org.springframework.beans and org.springframework.context which helps in providing the functionality of the IoC container. The form handling and form validating features of the Spring MVC framework can be easily integrated with all popular view technologies such as ISP, Jasper Report, FreeMarker, and Velocity. Spring framework versions enable the developer to model a wide range of transactions on the basis of Spring’s declarative and programmatic transaction management.
The Spring framework architecture consists of nearly seven modules as seen in the above figure. The particular modules are Spring AOP, Spring Core, Spring DAO, Spring context, Spring MVC, and Spring Web Flow. Every module provides us with various enterprise apps. You have the freedom to leverage Spring web MVC modules to develop MVC-oriented apps. This can support along with the Spring framework architecture.
The Spring Core module is found to be the core component belonging to the Spring framework. It provides the needed IoC container. There are two Spring core implementations belonging to the Spring container. It is known as the bean factory as well as the application context. Bean factory is defined using the org.springframework.beans.factory.BeanFactory interface. This can also act as a bean container. It can allow everyone to decouple a few specifications and configurations belonging to the dependencies. As for the Spring framework, you can see that the Bean factory is the central IoC container. It has the ability to instantiate different app objects. It can go about configuring and assembling dependencies between various objects. We have plenty of BeanFactory interface implementations. The XmlBeanFactory class would be the most common BeanFactory interface implementation. This can allow everyone to express all the objects for the purpose of composing your application. It can also remove any further interdependencies between different application objects.
In comparison to Object-Oriented Programming (OOP), you can break down different applications into various object hierarchy. AOP can also break down various programs into different concerning aspects. Spring AOP module would allow everyone to implement aspects or concerns belonging to the Spring application that would allow everyone to implement various aspects and concerns belonging to the Spring AOP application. The aspects would be the regular Spring beans or various regular classes that are annotated using @Aspect annotation. All the aspects would help different transaction management as well as logging along with application failure monitoring.
We can utilize the Spring ORM module to access all the data from different application databases. It can provide different APIs to manipulate databases using Hibernate, JDO, and iBatis. While Spring ORM would be supporting DAO, this would provide you with a consistent way to build all the following DAOs-related ORM solutions:
With Web MVC module belonging to the Spring, you can implement the best MVC architecture to create Web apps. This can separate all the model and view components code of a Web application. Using Spring MVC, while you generate a request from a different browser, it would go on to the DispatcherServlet class (Front Controller). This would dispatch the controller request, which can be Abstract Wizardform Controller class or SimpleFormController class with different handler mappings.
When the Spring framework was introduced in 2004, there has been a significant major revision, such as Spring 2.0 provided XML namespaces and AspectJ support, Spring 2.5 provided annotation-driven configuration, Spring 3.0 provided a Java-based @Configuration model. The latest release of the spring framework is 4.0. it is released with the support for Java 8 and Java EE 7 technologies. Though you can still use Spring with an older version of java, the minimum requirement is restricted to Java SE 6. Spring 4.0 also supports Java EE 7 technologies, such as java message service (JMS) 2.0, java Persistence API (JPA) 2.1, Bean validation 1.1, servlet 3.1, and JCache. We can safely save that it has a long way to go and help you with enterprise app development solutions.
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