What is J2EE architecture?
J2EE Architecture is made up of three tier, such as the client tier that is used as an interactive medium for the end user or the client & consists of web clients and application clients, the middle tier that is used for defining logical functioning units & consist of web components and EJB components, and the …
How many layers are there in J2EE architecture?
J2EE architecture has various layers working in unison. These include the client, presentation, business logic and data access layer. The client tier acts as the interaction point between the client and the application. The presentation layer is where an interface is generated dynamically using different components.
What are the three types of J2EE?
J2EE defines four types of modules:
- Application Client Module.
- WEB Module.
- Enterprise JavaBeans Module.
- Resource Adapter Module.
What are J2EE concepts?
J2EE (Java 2 Platform Enterprise Edition) is a platform-independent environment used for configuring web-based enterprise applications. It contains several API, protocols, and run time environment for the development of network-based web services.
What is Java EE architecture?
Java EE is a structured application with a separate client, business, and Enterprise layers. It is mostly used to develop APIs for Desktop Applications like antivirus software, game, etc. It is mainly used for developing web applications. Suitable for beginning Java developers.
What is J2EE and its components?
J2EE applications are made up of components such as JavaServer Pages (JSP), Java servlets, and Enterprise JavaBeans (EJB) modules. These components enable software developers to build large-scale, distributed applications.
What are the four components of J2EE application?
What are the four parts of J2EE?
The four J2EE application components are: Client tier, Web tier, business tier and enterprise information system (EIS) tier.
What is J2EE used for?
The J2EE platform provides choices for graphical user interfaces across a company’s intranet or on the World Wide Web. Clients can run on desktops, laptops, PDAs, cell phones, and other devices. Pure client-side user interfaces can use standard HTML and Java applets.
What are the types of system architecture in Java EE?
The AS Java system consists of three logical layers: Java Enterprise Runtime – comprises low-level subsystems that provide functions such as class loading, cluster communication, persistent configuration data management, and so on.
What is the difference between J2EE and Java EE?
The correct short name is “Java EE” When the enterprise Java platform was first introduced, it was called “Java 2 Platform, Enterprise Edition”, with the abbreviation “J2EE”.
What all technologies are included in the J2EE architecture?
2.2 The J2EE Components
- Enterprise JavaBeans (EJB)
- Java Servlets.
- JavaServer Pages (JSP)
- Java Naming Directory Interface (JNDI)
- Java Database Connectivity (JDBC)
- Java Message Service (JMS)
- Java Transaction API (JTA)
- Java API for XML (JAXP)
What are the components of J2EE?
Why is it called J2EE?
What is the architecture of a J2EE server?
J2EE provides many architectural choices. J2EE also offers many component types (such as servlets, EJBs, JSP pages, and servlet filters), and J2EE application servers provide many additional services. While this array of options enables us to design the best solution for each problem, it also poses dangers.
Are You a pure J2EE architect or developer?
J2EE architects and developers are, after all, employed to deliver cost-effective solutions that meet or exceed requirements, not to write “pure” J2EE applications. Let’s consider some typical issues that may force us to use vendor-specific extensions:
How does the J2EE architect control the EIS tier?
The J2EE architect’s control over the design and deployment of the EIS tier will vary depending on the nature of the project (green field or integration of existing services). If the project involves the integration of existing services, the EIS tier resources may impact on the implementation of the middle tier.
What is command design pattern in J2EE?
In J2EE web applications, the Command design pattern promotes clean connectivity between web tier and middle tier through non web-specific command objects.