Business JavaBeansTM Technology Introduction
For corporate developers, it is difficult to write distributed business applications and any other larger apps that they are faced with a common problem. If an application is distributed, or in multiple forms in the network, it must be a fully integrated product. If an application must be reliable and guaranteed to execute its business logic, its integration level must be further improved
Comprehensive study EJB 2.0
The new EJB 2.0 specification is more than just a new stage of issue, which has joined many striking changes, including some changes in the CMP component model and a new bean type, which will enhance your development application Flexibility and portability
Enterprise Bean Development
Now, from the following aspects, the development of Enterprise Bean is introduced: 1. Steps to develop EJBs Second, how to use JBuilder
Explanation of EJB
BEAN is an abbreviation of Enterprise Java Bean, a bean plays a role of an application material. She contains a Functional Interface, a Life-Cycle Interface, and a category of a business method that does what it supports it.
State Enterprise JavaBeans
Under the Trend of Component-Base and N-Tier, the stateless object plays an important role. The Stateless article is a product that combines both OO and Transaction Service. OO technology emphasizes flexibility (Reusability), Reusability, and Distribution, Transaction Service technology emphasizes efficiency (SCALABILITY)
EJB core technology and its application
The full name of EJB is Enterprise Java Bean. It is a commercial application component technology in Java. The role EJB component structure in the EJB structure is component-based distributed computing structure, which is components in a distributed application.
What is different from the javabean and EJB?
You may now use Javabean, but you still don't understand it. If you have a browser that supports Java, there is no limit on using JavaBean on your desktop. The web page that can be used as part of the small application. You will soon interact with Javabean as a visual part of your browser, then those JavaBean will be with the EJB interface on the server.
ENTERPRISE JAVABeans Components
This article outlines Enterprise JavaBeans (EJB) technology, designed to make readers quickly understand the basic concepts. Part 1 describes the history and certain goals, advantages and techniques of EJB technology. For the sake of simplicity, there is a choice to tell some key elements of EJB technology.
ENTERPRISE JAVABEANS Components Two
The second part of this article describes the role of Java interfaces and classes required to create Enterprise JavaBean components. In addition to coding the Bean class itself, EJB developers must also define a local interface and a remote interface for bean.
ENTERPRISE JAVABEANS Components Three
Part 3 of this article describes the deployment procedures of Enterprise JavaBeans components, and deployment is not just installed because it usually involves code generation. Deployment also uses a special deployment descriptor file that supports the parameters that control the enterprise-level bean behavior (such as a bean requires transactions). This feature of bean deployed supports the illustrative of Bean behavior, and the program-specific EJB objective.
Make full use of EJB to make the mobile work group strong
If your company has rely on using multiple layers of business Java applications, then you may be more close to wireless technology than imagination. By describing a sample application, AASHISH PATIL shows you how to connect your existing enterprise Java infrastructure to Wi-Fi in the wireless network. Use existing EJBs, modified servlets, and new WML and WMLScript pages that make this process generate a leap in-depth discussion EJB new message driver assembly
We can use MessageDriveNbean (Message Drive Components) to perform asynchronous messaging in an enterprise-class application
Step step by JBuilder5 development EJB
Enterprise Java Beans (EJB) 1.1 Specifications formally define a component model of the Java server, as well as the programming interface of the application server. This type of component established by developers is called Enterprise Beans, which includes business logic.
12 strokes that enhance EJB performance
Enterprise JavaBeans (EJB) is a widely used service-side component architecture based on J2EE platform, which can be used to quickly develop flexible, reusable, portable to the task-critical to each middleware platform. Enterprise application
One of the EJB series tutorial
First of all, I am not familiar with JB4 (JBuilder4), IAS41 (Inprise Application Server) and VBJ411 (Visibroker For Java), but I have read some English document configuration and test, I wrote this, I maybe it Everyone is a bit used
EJB series of tutorials
First, establish a project file ---> new project project name is: HelloWorld Select a root directory of the project, root path, for example
EJB series of tutorials
Events in Session Beans are usually performed for the tasks and processes set by the client. It only exists in the process of customer connection, it can also be said that Session Beans reflects the client of EJB Server, which is usually serving the client.
Squiring steps of progressive session beans (1)
Session bean represents a session between the customer's application and the EJB container. Session Bean is usually commercial logic and interacts with Entity Beans to perform specific operations. However, the session bean does not have to use Entity Bean. If needed, it can communicate directly with the database
Squiring steps of progressive session bean (2)
Enterprise Javabean is not very accustomed to you not run it, but configure it. Depending on the container used, create a JAR file with a packaging tool, including EJB classes, XML configuration description files and Helper classes
Squiring steps of progressive session bean (three)
From a programming point of view, creating a stateless session bean is as simple as creating status. In addition to modifying a setting in the configuration tool, only one thing is different in the initial design phase of the bean, and the stateless session bean does not remember anything between the method call, and any messages needed by the bean must be obtained by the client.
Squiring steps in progressive session bean (four)
In the EJB specification, there are some restrictions and requirements for Session Beans. These restrictions indicate which beans must do, which are unable to do, and some methods and interfaces that Beans must implement.
Square progressive session bean (5)
The main purpose of the HelloWorldSession example is to help you be familiar with the overall structure of a session bean. Now you are familiar with the structure of the session bean, you can write a more practical bean's introduction to several major EJB Container
After Sun officially launched the EJB specification, a large response has caused a lot of companies and developers. It is very simple to mark the Java development enterprise application system. Many companies have launched or are intending to EJB products. EJB has become a research focus of Java technology
Introduction to Enterprise JavaBeans
You should now be familiar with the entire EJB architecture and its main components. This section describes these components more detail and explains their runtime. Home interface EJB library uses Enterprise Bean client to create its instance through its HOME interface
Introduction to Enterprise JavaBeans
EJB is not a product. It is a specification of the Java server-side service framework, software vendors implement the EJB server based on it. Application developers can focus on supporting the business logic required to apply, without having to worry about the implementation of the surrounding framework.
Introduction to Enterprise JavaBeans
Session Bean is an Enterprise Bean that creates and connects to the client through Home Interface. Session bean instance is generally shared with other clients
Introduction to Enterprise Javabeans
The entity bean is used to represent the underlying object. The most commonly used entity bean represents data in the relational library. A simple entity bean can define a record representative of the database table, that is, every instance represents a special record.
Enterprise JavaBeans Introduction
Internal and external exchange of entity beans should now take a look at the javax.ejb.entityBean interface. Public interface javax.ejb.entityBean Extends EnterpriseBean
Introduction to Enterprise Javabeans
EJB's transaction model is similar to OTS. In fact, CORBA-compatible EJB servers must provide an OTS compatible transaction service. Understanding how OTS works helps to understand the work of transactions in EJB
Introduction to Enterprise Javabeans
If a BEAN's transaction is controlled to TX_Bean_Managed, this bean can access the transaction service. This control can only be applied to the entire bean when transaction control is applied to a single method. Bean access to transaction services cannot only work for a certain method.
EJB entry of the code life learning
Today, we finally started our EJB road. I will take you a little bit of learning EJB development, use, and subordinates in the application system. For a Java developer, EJB is a small gateway
EJB entry of the code Life Academy (2)
This lecture us will talk about the Class file part of the compiled compilation to the J2EE system. For EJB, it does not directly put the file one by one into the server, must be packaged into .ear files can be stored in the server.
EJB entry of the code Life Academy (3)
In the previous talk, we put EJB to the J2EE server through Application Deployment Tool. I think everyone wants to use a client program to call it.
Develop EJB (on)
Now, from the following aspects, the development of Enterprise Bean is now introduced: Developing the main key steps for EJB. How to use JBuilder.
Development EJB (below)
EJBHOME base class: Each home interface extends the javax.eb.ejbhome interface. The following code shows the definition of the javax.ejb.ejbhome interface
EJB overview (on)
This section includes the main content: EJB architecture: The architecture of EJB technology is introduced. Why use EJB containers
EJB overview (below)
Enterprise Beans Provider: Beans providers are experts in the application. For example: Beans providers may be an expert in financial or telecommunications. Beans providers provide business methods for business Tasks, Enterprise Javabean, ENTERPRISE JAVABEAN
Enterprise JavaBean has a large design naming convention. Such a programming architecture has a certain limit. In this case, although there is no application, it provides a virtual application for EJB servers and containers.
Write Enterprise Bean clients (on)
Enterprise JavaBean customers are a separate application, or a servlet, or an applet, still or another Enterprise Javabean. In any case, customers should use an Enterprise Javabean to do the following things.
Write Enterprise Bean's client (below)
The handle is another method used to reference Enterprise Beans. The handle is equivalent to a longer pointer of Bean. You can get your handle from the Remote interface. Once you have a handle, you can write it into a file or other persistent memory.
