|By Troy Holmes||
|July 23, 2003 12:00 AM EDT||
During a recent EAI project, it came to my attention that it is difficult to find documentation on the topic of installing Oracle into WebSphere Studio Application Developer (WSAD) and WebSphere Application Server (WAS) 5.0. This article will attempt to expedite the search for this information by discussing both installation processes.
Step 1: Install Oracle
The first step is to install the Oracle drivers and the tnsnames.ora file into our system. To do this, install the Oracle client onto the machine that contains WSAD by following the instructions provided by Oracle. For simplicity's sake, this article assumes use of the defaults provided by the Oracle installation wizard.
Step 2: Set Up the Default User Password
This is part of the new J2C security configuration and it is located on the Security tab. In this section, we will create a user ID and password and assign it to an alias ID. This alias is required in Step 5.
-User ID: The Oracle-defined user ID
-Password: The password for the Oracle user
-Description: Default Oracle user
Step 3: Create a Server and Configuration
WSAD uses an embedded server to test development code. To use this server we must first create a new server and configuration. Create a new server by selecting New -> Other -> Server/Configuration from the menu.
On the first screen enter Test Server as the server name and select Test Environment as the server type. Use the default port of 9080 and click on the Finish button. This will create a new server and configuration in the Server Configuration screen located in the lower panel of WSAD.
Step 4: Add the JDBC Driver
This step will link the Oracle driver we installed in Step 1 to the newly created server/configuration.
Step 5: Add the Data Source
The data source is where we assign the JNDI name and alias users.
Step 6: Edit the Resource
The only required field in the Resources screen is the URL. This field is used by the server to look up the tnsnames.ora file and find the port to the database. Select the URL and make the following modification.
The URL format is jdbc:oracle:thin: @xxx.xxx.xxx.xxx:1521:dbalias. This URL is broken into four sections delimited by colons. The URL is defined as follows:
- Provider type
- Oracle host IP address
- Oracle listener port
- Oracle database name
Figure 1 is an example of the completed data source.
Now that we've configured our WSAD environment, we can proceed to testing. This can be completed in six steps:
1. Create a new Web project.
2. Copy the servlet code from Listing 1 into your new Web project. Modify the table name and column name in the servlet code to match the table and columns in your database.
3. Modify the user ID and password to match your database.
4. Modify your web.xml to initialize the servlet on startup.
5. Publish the project to the server/ configuration we created earlier.
6. Start the server.
If successful, the server console will now display the output of our table.
The Admin Console is now run through the Deployment Manager. We will not go into detail on this process, as that is out of scope for this article. However, it is important to understand that all configuration management is handled via the Deployment Manager. If you would like more information on this topic, refer to the IBM Redbook (SG24-6195-00), titled "IBM WebSphere Version 5.0 System Management and Configuration."
Step 1: Install Oracle
We must install the Oracle drivers on each application server. The Oracle driver is a server resource and the Deployment Manager does not manage it. To do this, install the Oracle client onto the machine that contains WAS by following the instructions provided by Oracle. As before, use the defaults provided by the Oracle installation wizard.
Step 2: Create the J2C Default User ID and Password
Now we need to set up our alias, which will be required in Step 5.
-User ID: The user ID that you have set up in Oracle
-Password: The password that you have set up in Oracle for the user ID above
-Description: Default Oracle user
Step 3: Add the JDBC Driver
Step 4: Add the Data Source
Step 5: Add the Resource
Step 6: Create the JDBC Driver Environment Variable
The final step is to create an environment variable that enables WAS to access the JDBC driver.
Now that we have configured our WAS environment, we need to test our configuration. This can be completed in six easy steps:
1. Create a new Web project.
2. Copy the servlet code as before into your new Web project. Modify the table name and column name in the servlet code to match the table and columns in your database.
3. Modify your web.xml to initialize the servlet on startup.
4. Create a WAR file wrapping the servlet code for deployment.
5. Install the WAR file into WAS as a new enterprise application.
6. Start the application.
If we were successful, the log files of your server console should display our table information.
|Pallavi 09/15/04 02:04:49 PM EDT|
Very good article. I had lots of problems with Oracle and WSAD connectivity. This article helped me to solve all the problems!
|Jesse Aalberg 07/31/03 08:47:00 PM EDT|
You think this is an obscure topic, try finding some info on using Oracle 9i JDBC OCI driver! FWIW, the KEY difference when using this driver is the DataSource URL. It must be jdbc:oracle:oci:@ , where is the entry in your tnsnames.ora file.
I've spent so much time trying to get this to work, and have only recently accomplished it. Just thought I'd share.
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