The Architect Enterprise Applications with Java EE course provides students with knowledge needed to develop robust architectures for enterprise Java. By taking this course, you'll understand how Enterprise Java applications developed using the architecture as a guideline can accommodate rapid change and. This Architect Enterprise Applications with Java EE training teaches you to develop architectures for enterprise Java applications using the Java Platform.
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This Architect Enterprise Applications with Java EE training teaches you how to develop robust architectures for enterprise Java applications. Learn how to use. Enterprise Architect for Java 2 Platform, Enterprise Edition exams. Java platform experts Cade and Roberts . Implementing Applications Using J2EE. Download PDF Architect; Developer; J2EE Developer; Java EE Developer The Architect Enterprise Applications with Java EE course teaches you how to.
The fact that the Java EE architecture provides configurable services means that application components within the same Java EE application can behave differently based on where they are deployed. For example, an enterprise bean can have security settings that allow it a certain level of access to database data in one production environment and another level of database access in another production environment.
The container also manages non-configurable services such as enterprise bean and servlet life cycles, database connection resource pooling, data persistence, and access to the Java EE platform APIs described in Java EE APIs. Although data persistence is a non-configurable service, the Java EE architecture lets you override container-managed persistence by including the appropriate code in your enterprise bean implementation when you want more control than the default container-managed persistence provides.
For example, you might use bean-managed persistence to implement your own finder search methods or to create a customized database cache. The Java EE components and container addressed in this tutorial are shown in Figure 5. Enterprise beans and their container run on the Java EE server. Web components and their container run on the Java EE server.
An application client container manages the execution of all application client components for one Java EE application. Application clients and their container run on the client machine. An applet container is the web browser and Java Plug-in combination running on the client machine.
A Java EE application is composed of one or more enterprise bean, web, or application client component modules. The final enterprise solution can use one Java EE application or be made up of two or more Java EE applications depending on design requirements A Java EE application and each of its modules has its own deployment descriptor.
An enterprise bean module deployment descriptor, for example, declares transaction attributes and security authorizations for an enterprise bean. Because deployment descriptor information is declarative, it can be changed without modifying the bean source code. At run time, the Java EE server reads the deployment descriptor and acts upon the component accordingly. Each application client JAR file contains its deployment descriptor, related files, and the. Each WAR file contains its deployment descriptor, related files, and the.
Using modules and EAR files makes it possible to assemble a number of different Java EE applications using some of the same components. Development Roles Reusable modules make it possible to divide the application development and deployment process into distinct roles so different people or companies can perform different parts of the process.
The first two roles involve downloading and installing the Java EE product and tools. Once software is downloadd and installed, Java EE components can be developed by application component providers, assembled by application assemblers, and deployed by application deployers.
In a large organization, each of these roles might be executed by different individuals or teams. This division of labor works because each of the earlier roles outputs a portable file that is the input for a subsequent role.
For example, in the application component development phase, an enterprise bean software developer delivers EJB JAR files. The different roles are not always executed by different people. If you work for a small company, for example, or if you are prototyping a sample application, you might perform the tasks in every phase.
Product providers are typically operating system, database system, application server, or web server vendors who implement the Java EE platform according to the Java 2 Platform, Enterprise Edition Specification.
Tool Provider The tool provider is the person or company who makes development, assembly, and packaging tools used by component providers, assemblers, and deployers.
Application Component Provider The application component provider is the company or person who creates web components, enterprise beans, applets, or application clients for use in Java EE applications.
Enterprise Bean Creation A software developer performs the following tasks to deliver an EJB JAR file that contains the enterprise bean: Writes and compiles the source code Specifies the deployment descriptor Bundles the. Writes and compiles the source code Specifies the deployment descriptor for the client Bundles the. The assembler or deployer can edit the deployment descriptor directly or use tools that correctly add XML tags according to interactive selections.
Specifies the deployment descriptor for the Java EE application. Application Deployer and Administrator The deployer and administrator is the company or person who configures and deploys the Java EE application, administers the computing and networking infrastructure where Java EE applications run, and oversees the runtime environment.
Duties include such things as setting transaction controls, security attributes, and specifying connections to databases. During configuration, the deployer follows instructions supplied by the application component provider to resolve external dependencies, specify security settings, and assign transaction attributes. During installation, the deployer moves the application components to the server, and generates the container-specific classes and interfaces.
Configures the Java EE application for the operational environment by modifying the deployment descriptor of the Java EE application. Web Server The web server provides services to one or more web containers.
For example, a web container typically relies on a web server to provide HTTP message handling. A Java EE implementation is not required to support a particular type of web server, which means the web server supported by different Java EE products can vary.
Database Access The relational database provides persistent storage for application data. A Java EE implementation is not required to support a particular type of database which means the database supported by different Java EE products can vary. Enterprise JavaBeans Technology 2. You can think of an enterprise bean as a building block that can be used alone or with other enterprise beans to execute business logic on the Java EE server. There are three kinds of enterprise beans: session beans, entity beans, and message-driven beans as described in Business Components.
The EJB container handles this for you. JDBC 2. You use the JDBC API in an enterprise bean when you override the default container-managed persistence or have a session bean access the database. With container-managed persistence, database access operations are handled by the container and your enterprise bean implementation contains no JDBC code or SQL commands. Java Servlet Technology 2. A servlet class extends the capabilities of servers that host applications accessed by way of a request-response programming model.
Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers. It enables distributed communication that is loosely coupled, reliable, and asynchronous. The Java EE architecture provides a default auto commit to handle transaction commits and roll backs. An auto commit means any other applications viewing data will see the updated data after each database read or write operation.
However, if your application performs two separate database access operations that depend on each other, you will want to use the JTA API to demarcate where the entire transaction including both operations begins, rolls back, and commits. The JavaMail API has two parts: an application-level interface used by the application components to send mail, and a service provider interface.
Architect Enterprise Applications with Java EE (D68136GC20)
It provides standard services to determine the type of an arbitrary piece of data, encapsulate access to it, discover the operations available on it, and create the appropriate JavaBean component to perform those operations. Programs and tools can generate XML files that other programs and tools can read and handle.
For example, a Java EE application can use XML to produce reports, and different companies that receive the reports can handle the data in a way that best suits their needs. Training courses about the cloud stack for IT professionals and end users. Course Objectives Make good use of Java EE component technologies to solve typical problems in system architecture Derive software systems using techniques outlined in the Java EE Blueprint and solutions defined in the Java EE Patterns Address quality-of-service requirements in a cost-effective manner using engineering trade-off techniques Describe the role of the architect and the products an architect delivers List and describe typical problems associated with large-scale enterprise systems.
Introduction to the Java EE Architecture
Learn To: Identify non-functional requirements NFRs and describe common problems and solutions. Translate business requirements into an architecture. How to weigh choices in architecting the client, web, business, integration and data tiers. Apply various evaluation criteria to choosing architectural elements and patterns, tools, servers and frameworks. Classroom Training Modality: Click on the location to go directly to the booking page Schedule.
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Java EE: Overview
Download PDF.Product providers are typically operating system, database system, application server, or web server vendors who implement the Java EE platform according to the Java 2 Platform, Enterprise Edition Specification.
This means application logic is divided into components according to function, and the various application components that make up a Java EE application are installed on different machines depending on which tier in the multitiered Java EE environment the application component belongs. Three-tiered applications that run in this way extend the standard two-tiered client and server model by placing a multithreaded application server between the client application and back-end storage.
Java EE Architecture Normally, thin-client multitiered applications are hard to write because they involve many lines of intricate code to handle transaction and state management, multithreading, resource pooling, and other complex low-level details. Also, creating web services or highly scalable logic components is simplified through the use of the Enterprise JavaBeans EJB specification.