The Java EE, currently known as Jakarta EE, is a programming model with an application framework that provides a set of standard APIs for developing and deploying Java applications and web services for enterprises and companies.
Java EE greatly simplifies development by removing much of the boilerplate code, that is needed in other languages. This reduces development time, increases developer productivity and increases quality of the resulting code.
Some enterprises prefer Java EE because it is a standardized open-source environment that is used across industries. The Java EE specifications describe the core aspects of an application server, which include security, transaction management, messaging, persistence, and web services. The framework has components that are typically used in most Java Enterprise Applications, which helps to speed up development process by ensuring consistency in the codebase across the application tiers.
Java EE is a multi-tiered system that is well-suited for enterprise applications. Built upon Java SE, Java EE has a structured application, having three separate tiers for Client, Business and Web. But what does each tier offer? Read ahead to find out.
Web Tier
The web tier of Java EE is where your servlets and JSPs live. It is built on top of Java’s Servlet API which simplifies programming by providing a framework for writing web applications in the Java language. It is also responsible for providing web services to clients via HTTP requests over TCP/IP networks. Web services are an emerging model for web-based Internet applications that use SOAP, XML and HTTP as communication protocols simultaneously.
Client Tier
The client tier handles all the communication between the client and the server. The client-server model is an application architecture that divides the user interface (the “client”) from the data processing (the “server”), exposing each to a different set of technologies. It acts on behalf of the user and sends requests to the server. The server processes these requests and responds to the client. It also provides an abstraction for end users to use or access data from any data source or service that can be accessed from within Java EE.
This tier of Java EE consists of all classes and interfaces in the Javax (now known as Jakarta) package, which provides basic functionality for constructing web pages, accessing databases, sending email, JSP pages, servlets and applets, etc.
Business Tier
The business tier is for large enterprise applications, such as Enterprise Resource Planning (ERP) systems. It provides a way to interface with backend systems like SAP, Oracle and SQL Server through open standards like ODBC and JDBC. The business tier includes the Enterprise Java Beans (EJB) components, now known as Enterprise Jakarta Beans (EJB). It is also known as the application server, where it contains all your enterprise’s code as well as other services such as transactions, persistence, security, etc.
The business tier of JAVA EE consists of all classes in the Javax (now known as Jakarta) enterprise package and organization package. This layer contains application components such as servlets, web service endpoints, message-driven beans, etc.
Java EE is a platform for developing and deploying enterprise applications, based on the Java programming language. It was developed to simplify the development of “enterprise” applications, which are typically used for business-critical systems, by providing a comprehensive set of libraries that allow developers to build robust and secure full-featured applications. However, to develop long-lasting, robust applications, it requires expertise of experienced developers and IT support, just like Saransh Inc.
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