J2ee architecture in java

JEE or J2EE Design Patterns J2EE design patterns are built for the developing the Enterprise Web-based Applications. In J2EE , there are mainly three types of design patterns, which are further divided into their sub-parts: 1. Presentation Layer Design Pattern • • • View Helper Pattern • Composite View Pattern 2. Business Layer Design Pattern • Business Delegate Pattern • Service Locator Pattern • Session Facade Pattern • Transfer Object Pattern 3. Integration Layer Design Pattern • Data Access Object Pattern • Web Service Broker Pattern

• • • • • Introduction to Java Connector Architecture Introduction to Java Connector Architecture By Paul Jensen, OCI Principal Software Engineer May 2002 Introduction As a required element of the Java 2 Enterprise Edition (J2EE), the Java Connector Architecture (JCA) provides a standardized means to integrate with Enterprise Integration Systems (EIS). Such systems include: • Enterprise Resource Planning Systems – SAP, PeopleSoft, Baan • Transaction Monitors – CICS, Tuxedo • Database Management Systems – Oracle, Sybase Prior to the introduction of JCA, each EIS provided a proprietary solution for EIS/J2EE integration. This proved problematic in that each EIS driver required custom integration with each application server, restricting portability and increasing overall vendor effort. With the advent of JCA, drivers may be written to standard J2EE application server contracts, providing integration of transactions, security, and resource pooling. In addition, JCA defines optional client contracts to standardize access to record-based systems. These contracts, similar in nature to the JDBC APIs, may be utilized by J2EE components. Resource Adapters A JCA Resource Adapter serves as a software driver for an EI system. Resource Adapters may be utilized in a standalone manner (an unmanaged environment) or in a J2EE application server (a managed environment). The architecture of the managed environment is illustrated in Figure 1. Figure 1 As shown, the Resource Adapter supports 3 ...

Java EE 8 Technologies Technologies JSR Download Web Profile Java EE Platform Java Platform, Enterprise Edition 8 (Java EE 8) Web Application Technologies Java API for WebSocket 1.1 Java API for JSON Binding 1.0 Java API for JSON Processing 1.1 Java Servlet 4.0 JavaServer Faces 2.3 JavaServer Pages 2.3 Standard Tag Library for JavaServer Pages (JSTL) 1.2 Enterprise Application Technologies Batch Applications for the Java Platform 1.0 Concurrency Utilities for Java EE 1.0 Contexts and Dependency Injection for Java 2.0 Dependency Injection for Java 1.0 Bean Validation 2.0 Enterprise JavaBeans 3.2 Interceptors 1.2 Java EE Connector Architecture 1.7 Java Persistence 2.2 Common Annotations for the Java Platform 1.3 Java Message Service API 2.0 Java Transaction API (JTA) 1.2 JavaMail 1.6 Web Services Technologies Java API for RESTful Web Services (JAX-RS) 2.1 Implementing Enterprise Web Services 1.3 Web Services Metadata for the Java Platform 2.1 Java API for XML-Based RPC (JAX-RPC) 1.1 (Optional) Download spec Java API for XML Registries (JAXR) 1.0 (Optional) Management and Security Technologies Java EE Security API 1.0 Java Authentication Service Provider Interface for Containers 1.1 Java Authorization Contract for Containers 1.5 Java EE Application Deployment 1.2 (Optional) J2EE Management 1.1 Debugging Support for Other Languages 1.0 Java EE-related Specs in Java SE Java Management Extensions (JMX) 2.0 SOAP with Attachments API for Java (SAAJ) Specification 1.3 Streaming API...

This article’s main focus is to inform the readers about Java’s different versions and how are they different. First of all, let’s understand what Java is really about. Java is basically a general purpose, high level programming language, which is widely used for development of application softwares. • Simple, Object-oriented and familiar • Robust and Secure • Architecture-neutral and portable • High performance • Firstly java is compiled to bytecode, which then either compiled, or interpreted depending on mood of JIT. Some interesting facts about Java- • Java’s old name was OAK (because of the Oak tree growing outside developer’s house). • Coffee Mug was deployed as Java’s symbol, because the developers of Java drank and loved coffee. • It was originally developed by Sun Microsystems, but later bought by Oracle. • First major JDK (Java Development Kit) 1.0 was released on January 21, 1996. • Android, one of the most famous mobile OS, is based on Java.(Android SDK also uses Java) • Java has no concept of pointers unlike its predecessors. • “JAVA” has nothing to do with “JAVASCRIPT”, which is a scripting language, and not a programming language. • Java is still no. 2 development platform worldwide • There are currently 9 million Java developers, all around the globe. Now, let’s understand about different editions of Java platform- • J2SE(Java Platform, Standard Edition) Also known as Core Java, this is the most basic and standard version of Java.It’s the purest form of Java...

Java EE 8 continues to improve API and programming models needed for today's applications and adds features requested by our world-wide community. This release modernizes support for many industry standards and continues simplification of enterprise ready APIs. Enhancements include: • Java Servlet 4.0 API with HTTP/2 support • Enhanced JSON support including a new JSON binding API • A new REST Reactive Client API • Asynchronous CDI Events • A new portable Security API • Server-Sent Events support (Client & Server-side) • Support for Java SE 8 new capabilities (e.g. Date & Time API, Streams API, annotations enhancements) Java EE 8 builds on Java EE 7. The following JSRs are new or updated in Java EE 8: • • • • • • • • • • • • • Learn how new ease-of-use features in JMS 2.0 enable you to write fewer lines of code. Learn how to take advantage of new messaging features in JMS 2.0. Learn how to expose data from a database via a JAX-WS RESTful web service and how to consume the service in an HTML5 application. Java Champion Johan Vos shows you how to integrate WebSockets into your applications. Project Name Home Project Description GlassFIsh Server Open Source Edition Java EE Reference Implementation built in open source Project Open MQ High quality, enterprise ready messaging; open source and a community of developers and users. Project Jersey Jersey is the open source, production quality, JAX-RS (JSR 370) Reference Implementation for building RESTful Web services. Project Griz...

What is Java? Java is basically everywhere – from Java redefined the way we use a computer language and the evolution of What is J2EE? This was originally known as Java 2 Platform, Enterprise Edition, which was later changed to Java Platform, Enterprise Edition (Java EE). This is one of the three computing platforms released by Sun Microsystems which was later acquired by Oracle Corporation. The other two platforms are Java Standard Edition (Java SE) and Java Micro Edition (Java ME). J2EE is nothing but an extension of the Java SE based on the Java programming language used for developing and deploying web-based enterprise applications. It consists of a set of APIs, services, and protocols that provide the functionality to develop multi-tiered web-based applications. It includes several technologies that extend the functionality of the Java SE APIs, such as Servlets, Connectors, Enterprise JavaBeans, etc. It’s mainly used for applications which run on servers and accessible through browsers like Chrome, Firefox, etc. It’s also used for developing Difference between Java and J2EE Terminology of Java and J2EE Java is a tem given by Sun Microsystems to refer to the Java Standard Edition (Java SE). It’s a widely used programming language which derives much of its syntax from C and C++ with fewer implementation dependencies. J2EE, originally known as Java Enterprise Edition (Java EE), is a collection of Java APIs owned by Oracle Corporation used to write server-side enterprise ...