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WebLogic Server 6.0 Code Examples, BEA Systems, Inc. |
See:
Description
Interface Summary | |
Account | The methods in this interface are the public face of AccountBean. |
AccountHome | This interface is the home interface for the EJBean AccountBean. |
Class Summary | |
AccountBean | AccountBean is an EntityBean. |
Client | This class demonstrates calling an entity EJBean. |
Servlet | This servlet is a program similar to that in the Client example. |
Exception Summary | |
ProcessingErrorException | ProcessingErrorException is thrown if the caller attempts to withdraw more than a certain preset limit from the account. |
This example is a package that demonstrates an Enterprise JavaBean. The example is an entity EJBean called AccountBean.
The example demonstrates:
The Servlet runs in a similar fashion to the Client example. Call the servlet using an appropriate URL as described in the servlet directions. See Run the example for sample servlet output.
To get the most out of this example, first read through the source code files.
As you'll use a database for the persistent storage of the entity EJBean, you'll need to set it up. Note that the persistent storage is completely invisible to the client; the actual storage is handled by the EJBean directly and not the container.
This example is shipped "pre-built"; you can either run it as shipped, or build the example and run it to test that you are able to successfully build and run EJBeans.
These three sections cover what to do:
We provide separate build scripts for Windows NT and UNIX:
These scripts build the example and place the files in the correct locations in your WebLogic Server distribution:
Running the build script places the EJB in /config/examples/applications, where it automatically deploys once the server is started. If you are already running the server and build another EJB, it is automatically placed in this directory and instantly deployed.
Additional information on using the build scripts is found in Building Enterprise JavaBean examples
A list of deployed EJBs displays.
This example contains a pre-configured servlet running in a browser called examplesWebApp.
With database persistence, each instance of an EJBean is written to a row in a table. The table (ejbAccounts) must be created and exist in the database before the example is run. If you are using the evaluation copy of Cloudscape that is included with WebLogic, this table has already been created in the "demo" database. If you're using a database other than Cloudscape, you'll need to create the table in your database using an appropriate SQL statement such as
"create table ejbAccounts (id varchar(15), bal float, type varchar(15))"
For your convenience, a sample connection pool, called demoPool is included with this example. You can use this connection pool with any of the EJB examples.
You'll need to:
# In the left pane, expand the Services node and choose JDBC.
# Click Connections Pool and then demoPool to display the configuration information in the right pane.
# Click the Connections tab and review the attribute settings to make sure that they are correct.
In particular, make sure that the URL and Driver Classname attributes are set for the correct database. This example connection pool is pre-configured for Cloudscape. For other databases, you will need to set an appropriate url and driver, such as
URL=jdbc:weblogic:oracle,\ DriverName=weblogic.jdbc.oci.Driver,\
In this example, the fileRealm for the access control list (ACL) is pre-configured to allow access for everyone.
If you need more information about how to use connection pools, read Programming WebLogic JDBC.
$ java examples.ejb.basic.beanManaged.Client "t3://WebLogicURL:Port"
where:
Beginning beanManaged.Client... Trying to find account with id: ID: 0 Trying to find account with id: ID: 1 Trying to find account with id: ID: 2 Trying to find account with id: ID: 3 Trying to find account with id: ID: 4 Trying to find account with id: ID: 5 Trying to find account with id: ID: 6 Trying to find account with id: ID: 7 Trying to find account with id: ID: 8 Trying to find account with id: ID: 9 Trying to find account with id: ID: 10 Trying to find account with id: ID: 11 Trying to find account with id: ID: 12 Trying to find account with id: ID: 13 Trying to find account with id: ID: 14 Trying to find account with id: ID: 15 Trying to find account with id: ID: 16 Trying to find account with id: ID: 17 Trying to find account with id: ID: 18 Trying to find account with id: ID: 19 Account: :ID: 0 has a balance of 0.0 Account: :ID: 1 has a balance of 1000.0 Account: :ID: 2 has a balance of 2000.0 Account: :ID: 3 has a balance of 3000.0 Account: :ID: 4 has a balance of 4000.0 Account: :ID: 5 has a balance of 5000.0 Account: :ID: 6 has a balance of 6000.0 Account: :ID: 7 has a balance of 7000.0 Account: :ID: 8 has a balance of 8000.0 Account: :ID: 9 has a balance of 9000.0 Account: :ID: 10 has a balance of 10000.0 Account: :ID: 11 has a balance of 11000.0 Account: :ID: 12 has a balance of 12000.0 Account: :ID: 13 has a balance of 13000.0 Account: :ID: 14 has a balance of 14000.0 Account: :ID: 15 has a balance of 15000.0 Account: :ID: 16 has a balance of 16000.0 Account: :ID: 17 has a balance of 17000.0 Account: :ID: 18 has a balance of 18000.0 Account: :ID: 19 has a balance of 19000.0 Querying for accounts with a balance greater than 5000.0... Account ID: 6; balance is $6000.0 Account ID: 7; balance is $7000.0 Account ID: 8; balance is $8000.0 Account ID: 9; balance is $9000.0 Account ID: 10; balance is $10000.0 Account ID: 11; balance is $11000.0 Account ID: 12; balance is $12000.0 Account ID: 13; balance is $13000.0 Account ID: 14; balance is $14000.0 Account ID: 15; balance is $15000.0 Account ID: 16; balance is $16000.0 Account ID: 17; balance is $17000.0 Account ID: 18; balance is $18000.0 Account ID: 19; balance is $19000.0 Removing beans... End beanManaged.Client...
Using user user1 and password user1Password Looking up account 10020... Did not find 10020 Account 10020 being created; opening balance is $3000.0 Part A: Depositing $100.0 Current balance is $3100.0 Withdrawing amount greater than current balance. Expecting an exception... Received expected Processing Error: examples.ejb.basic.beanManaged.ProcessingErrorException: Request to withdraw $3110.0 more than balance 3100.0 in account 10020 Part B: Creating 5 new accounts... Created account: 9543031558300; balance is $0.0 Created account: 9543031558301; balance is $100.0 Created account: 9543031558302; balance is $200.0 Created account: 9543031558303; balance is $300.0 Created account: 9543031558304; balance is $400.0 5 accounts successfully created Querying for accounts with a balance greater than 200.0... Account 10020; balance is $3100.0 Account 9543031558303; balance is $300.0 Account 9543031558304; balance is $400.0 Removing accounts just created... Removed account: 9543031558300 Removed account: 9543031558301 Removed account: 9543031558302 Removed account: 9543031558303 Removed account: 9543031558304 End beanManaged.Servlet...
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Documentation is available at http://e-docs.bea.com/wls/docs60 |