Enterprise JavaBeans Samples

Enterprise JavaBeans (EJB) is an architecture for component-based distributed computing by Sun Microsystems. The Enterprise JavaBeans (EJB) section contains a series of samples applications describing how to build and deploy applications in Oracle9i Containers for J2EE (OC4J).

EJB 3.0 Samples and HowTo's
Learn a variety of EJB 3.0 coding techniques in this extensive library of HowTo's.
See Samples

EJB Sample Application [01-Nov-2003]
This sample application demonstrates the EJB capabilities of Oracle Application Server.
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EJB QL Sample Application [11-Aug-2003]
Redhat Linux Certified
With the help of a 'Credit Card Accounts System' scenario, this application illustrates Date extensions to EJB-QL in OC4J. The application also illustrates a wide range of EJB QL queries as well as ejbSelect methods with EJB-QL..
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Source: InvokeEJB, UserAccountBean

OC4J-JMS Chat Sample Application [28-Aug-2003]
Redhat Linux Certified
With the help of a Chat scenario, this sample application demonstrates how to use and configure in-memory queues with OC4J JMS. The sample application also demonstrates the use of Message Driven Beans.
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Source

Message-Driven Beans with Oracle JMS [28-Apr-2003]
This sample demonstrates a simple Message-Driven Bean which is configured to receive messages via Oracle JMS from the Oracle Advanced Queueing messaging provider.
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Hotel Reservation System using EJB and Oracle Advanced Queuing [03-Feb-2003]
Oracle Advanced Queuing allows applications to function in a non-blocking manner thereby increasing the performance and for building loosely coupled applications. This sample implements a Hotel Reservation System using the above mentioned technologies.
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Hotel Reservation System using EJB [23-Dec-2002]
The application implements an EJB component, HotelSystemBean which is used by the client applications, to perform hotel reservation and enquiry on all the hotels in the System.
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EJB - Java Stored Procedure Communication [23-Dec-2002]
This sample shows how to communicate with a Java Stored Procedure running on the database from an EJB running on OracleAS.
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EJB Transactions [23-Dec-2002]
This sample illustrates an EJB transaction (bean-managed) that spans two database schemas by using Database Links to reference the second schema. This sample also demonstrates how to handle transactions using server side Java Transaction Service (JTS).
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Hotel Reservation System using BC4J [23-Dec-2002]
This sample implements Hotel Reservation System using Oracle BC4J .
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EJB and Clients
This sample shows how to wrap an Entity Bean with a Session Bean and add simple business rules. It also shows how to build various clients (Servlet, Swing, and command line) to access the remote EJB.
Note: This sample workspace contain a SQL script for installing the Sample schemas HR and OE. It is a prerequisite to run the sample. Download(ZIP, 81 KB) Readme
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Active Components for J2EE - Coordinating Long Running, Asychronous Application Interactions
This sample demonstrates Active Containers for J2EE (AC4J) capability to implement long-running, asynchronous interactions between loosely-coupled applications. In this demo a client makes an asynchronous call to a PurchaseOrder service. The PurchaseOrder service processes the client's request by creating a new Order Entity Bean and by executing two parallel, asynchronous requests to the Inventory service and Credit service in order to validate the order request. After that it makes an asynchronous call to the client, providing it with the PO number resulting from the previous step. Once the PurchaseOrder service receives confirmation from the other two services, it completes processing of the order request originally made by the client. During the order processing, the client can actively monitor the status of his order request based on the PO number send to him by the PurchaseOrder service. See the install note in the JAR file for installation instructions.
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