barcode 128 generator vb.net Benefits of Bean Pooling in an EJB Container in Java

Maker QR Code 2d barcode in Java Benefits of Bean Pooling in an EJB Container

Benefits of Bean Pooling in an EJB Container
QR Code ISO/IEC18004 Reader In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
Generate Quick Response Code In Java
Using Barcode encoder for Java Control to generate, create QR Code 2d barcode image in Java applications.
The benefit of passivation is that it allows the EJB container to make the best possible use of server resources by passivating a bean to free up resources and then reactivating it when resources are available. Note that a session bean can be passivated only between transactions, and not within a transaction.
QR Code Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Barcode Generator In Java
Using Barcode creator for Java Control to generate, create bar code image in Java applications.
Explain How the Enterprise JavaBeans Container Does Life Cycle Management
Bar Code Recognizer In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
QR Code ISO/IEC18004 Generator In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
CERTIFICATION OBJECTIVE 7.11
QR Code JIS X 0510 Generation In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
QR Code Creation In VS .NET
Using Barcode generation for VS .NET Control to generate, create QR-Code image in Visual Studio .NET applications.
Explain How the Enterprise JavaBeans Container Does Life Cycle Management and Has the Capability to Increase Scalability
Quick Response Code Creator In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
Drawing Barcode In Java
Using Barcode generation for Java Control to generate, create barcode image in Java applications.
Here, we review the life cycle of EJBs. We also describe their deployment, which is determined by the deployment descriptors settings.
Draw Data Matrix 2d Barcode In Java
Using Barcode generation for Java Control to generate, create Data Matrix image in Java applications.
Creating Bar Code In Java
Using Barcode drawer for Java Control to generate, create barcode image in Java applications.
The Life Cycle of an EJB
USS Code 93 Creator In Java
Using Barcode creator for Java Control to generate, create USD-3 image in Java applications.
Creating UCC - 12 In Java
Using Barcode encoder for BIRT reports Control to generate, create EAN128 image in BIRT applications.
Detailed documentation describing the life cycle of an EJB can be found in the EJB specifications on the Sun web site and is illustrated in Figure 7-10. The following list provides a general description of the life cycle states of an EJB session bean: 1. The client locates the bean s home reference using the JNDI services provided by the application server. 2. The JNDI service returns a home interface reference to the client. 3. The client uses the home interface reference to call the home.create() method. In response, the home object then creates an EJBObject. A new instance of the code in the bean class is also instantiated by the newInstance() method. 4. The new instance of the bean class, called a session bean, is allocated a session context. 5. The home object passes a reference to the EJBObject in the container to the client s remote interface. 6. The client s remote interface is now able to invoke methods on the EJBObject in the container. This EJBObject will pass these method calls to the session bean. 7. The session bean returns a result to the EJBObject, which in turn returns it to the client s remote interface.
Bar Code Recognizer In VS .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Decode EAN / UCC - 13 In C#
Using Barcode decoder for .NET Control to read, scan read, scan image in VS .NET applications.
7: Enterprise JavaBeans and the EJB Container Model
Generating Barcode In None
Using Barcode generator for Online Control to generate, create bar code image in Online applications.
Barcode Printer In Java
Using Barcode printer for BIRT Control to generate, create barcode image in BIRT applications.
FIGURE 7-10
GTIN - 13 Creator In .NET
Using Barcode maker for .NET Control to generate, create EAN13 image in VS .NET applications.
ECC200 Scanner In Visual C#
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
Life cycle for an EJB session bean
How the EJB Container Manages Life Cycle and How This Allows for Increased Scalability
Here are the steps that the container takes to manage the life cycle of an entity bean: 1. The container populates the free pool with a working set of bean instances. 2. A client calls the create() method on a home object. 3. The home object obtains a bean instance from the free pool. 4. The home object forwards the create() arguments (if any) to the ejbCreate() method on the bean class. 5. The bean class inserts a row into the table in the database. 6. The bean class returns the primary key of the row to the home object. 7. The container creates an EJBObject for the bean class and sets its primary key. 8. The home object invokes the ejbPostCreate() method on the bean class to finish the initialization process now that the EJBObject can be referenced, because it now exists. 9. The home object returns the remote reference to the EJBObject back to the client.
Explain How the Enterprise JavaBeans Container Does Life Cycle Management
10. The client can now invoke the business methods on the bean class (via the remote reference) that have been defined as available. 11. When the client is finished, the container moves the bean back to the free pool list after calling ejbPassivate (for an entity bean). Note that a substantial overhead is incurred when instantiating bean instances. Scalability within the EJB container environment is increased by preinstantiating a pool of bean instances (bean pool) and allowing them to be quickly utilized by clients.
Deployment
When an EJB application is ready to be deployed to an EJB container, the desired beans and deployment information must be placed in a JAR file. The deployment information that is also placed in this JAR file is contained in an XML file called a deployment descriptor.
Deployment Descriptors As mentioned earlier, the deployment descriptor is an XML file containing elements that specify how to create and maintain EJB components and how to establish runtime service settings. The deployment descriptor contains settings that are not to be hard-coded inside EJB components. These settings tell the EJB container how to manage and control EJB components and can be set at application assembly time or at application deployment time. Two basic types of elements are contained inside the deployment descriptor file:
Copyright © OnBarcode.com . All rights reserved.