All Examples

Enterprise JavaBean examples

• Basic EJB examples
  • examples.ejb.basic.beanManaged
  • examples.ejb.basic.containerManaged
  • examples.ejb.basic.statefulSession
  • examples.ejb.basic.statelessSession

• Extensions examples
  • examples.ejb.extensions.isModified
  • examples.ejb.extensions.isModifiedBeanManaged

• Sequence examples
  • examples.ejb.sequence.jdbc
  • examples.ejb.sequence.oracle

• Subclass example
  • examples.ejb.subclass.child
  • examples.ejb.subclass.parent

• Cluster examples
  • examples.cluster.ejb

• Jolt for WebLogic example
  • examples.jolt.ejb.bankapp

• WebLogic Enterprise Connectivity example
  • examples.wlec.ejb.simpapp

• Utilities examples
  • examples.ejb.utils.ListAll

quick guide to the examples

about these examples

These examples demonstrate different aspects of Enterprise JavaBeans. It's a good idea to run all of these examples before attempting to create your own Enterprise JavaBeans. They will show you the different steps involved.

The examples demonstrate:

• Package examples.ejb.basic.beanManaged
  • An entity EJBean with bean-managed JDBC persistence; the code in the EJBean directly accesses the data storage
  • Client examples include a single client, servlet and multi-threaded client

• Package examples.ejb.basic.containerManaged
  • An entity EJBean with container-managed JDBC persistence; the code in the EJBean never touches the data storage
  • Demonstration of using finder methods
  • Demonstration of using the EJB Deployment Wizard to deploy a bean
  • Client examples include a single client, servlet and multi-threaded client

• Package examples.ejb.basic.statefulSession
  • A stateful session EJBean

• Package examples.ejb.basic.statelessSession
  • A stateless session EJBean

• Package examples.ejb.extensions.isModified
• Package examples.ejb.extensions.isModifiedBeanManaged
  • Two entity beans demonstrating use of the WebLogic isModifiedMethod extension to the EJB 1.0 specification for optimizing calls to the underlying datastore.

• Package examples.ejb.sequence.jdbc
  • A entity EJBean that automatically generates its primary key in a scalable fashion
  • Demonstrates retrieving property values from the deployment descriptor at runtime

• Package examples.ejb.sequence.oracle
  • A stateless session EJBean that demonstrates using an Oracle sequence to generate unique IDs

• Package examples.ejb.subclass.child
  • A stateless session EJBean that demonstrates subclassing from one bean (ParentBean) to another (ChildBean) in the subclass example

• Package examples.ejb.subclass.parent
  • A stateless session EJBean used as a parent EJBean by the package examples.ejb.subclass.child in the subclass example

• Package examples.cluster.ejb
  • An EJBean that demonstrates calling EJBeans in WebLogic Clusters.

• Package examples.jolt.ejb.bankapp
  • A stateful session EJBean that calls a TUXEDO Server using Jolt for WebLogic

• Package examples.wlec.ejb.simpapp
  • A stateless session EJBean that accesses a CORBA object on a WebLogic Enterprise Server using WebLogic Enterprise Connectivity

• Package examples.ejb.utils.ListAll
  • A utility progrram that creates a list of all the EJBeans deployed on a Server.

Building and running the examples

1. Read the instructions for each example, found at the links above.

2. Set up your development environment as described in Setting your development environment.

3. Depending on the example, set up any special properties, such as database persistence.

4. Build each example, using the provided build scripts. We've provided instructions on using the build scripts. If you're using the scripts under Microsoft's SDK for Java, note the instructions on using the jar tool.

   Certain examples (subclass, cluster) build .jar files that contain multiple beans:

   • Subclass example combines both the parent and child beans into one .jar
   • Cluster example combines both the account and teller beans into one .jar

   Note that certain examples (extensions, child) depend on other beans being built first:

   • isModified and isModifiedBeanManaged examples depend on the containerManaged EJBean
   • Subclass child example depends on the parent EJBean

5. You can deploy each EJBean in one of two ways:
   • Permanently deploy the bean by adding its .jar file to the weblogic.ejb.deploy registration in the weblogic.properties file, then
   • start the WebLogic Server.
   or
   • Start the WebLogic Server, then
   • use the hot deploy feature of the WebLogic Console to deploy the .jar file. The bean's deployment will only last for that session of the Server.
   • If you build an example EJBean with the supplied build scripts and deploy it, you cannot run the build script again and redeploy the bean from the same .jar without getting an error. You need to build the bean to a new .jar file and redeploy from that second file.

   Note: If you're running under the Microsoft SDK for Java, you'll also need to add the path to the .jar to the CLASSPATH for your WebLogic Server.

6. Run the example following the instructions for the example.

there's more

Read more about EJB deployment in these Deployment Guides:

• Using the WebLogic EJB Deployment Wizard
• Using WebLogic Server hot deploy

Read more about building the EJB examples with our supplied scripts in Building Enterprise JavaBean examples.

Copyright © 1997-1999 BEA Systems, Inc. All rights reserved.

Last updated 09/22/1999