To create connections between an application and a relational database, the application
server uses the driver implementation classes that are encapsulated by the Java™ Database Connectivity (JDBC) provider.
Before you begin
Each JDBC provider is essentially an object that represents vendor-specific JDBC driver
classes to the application server, for establishing access to that particular vendor database. JDBC
providers are prerequisites for data sources, which supply applications with the physical
connections to a database. Consult the JDBC provider
table to identify the appropriate JDBC provider for your database and application
requirements.
About this task
Configure at least one JDBC provider for each database server that you plan to use at a
particular scope within your application server environment.
Procedure
- Open the administrative console.
- Click .
- Select the scope at which applications can use the JDBC provider.
The scope
that you select becomes the scope of any data source that you associate with this provider. You can
choose a cell, node, cluster, or server. For more information about scope and how it can affect
resources, see the administrative scope settings.
- Click New.
This action causes the Create a
new JDBC Provider wizard to launch.
- Use the first drop-down list to select the database type of the JDBC provider that you
must create.
The User-Defined option: Select
User-Defined
for your database type if you encounter either of the following scenarios:
- You do not see your database type.
- You cannot select the JDBC provider type that you need in the next step.
The user-defined selection triggers the wizard panel to display your provider type as a
user-defined JDBC provider, and your implementation type as user-defined. Consult your database
documentation for the JDBC driver class files, data source properties, and so on, that are required
for your user-defined provider. You must supply this information about the next two panels:
- database class path
- database-specific properties
- Select your JDBC provider type if it is displayed in the second drop-down list.
Select Show Deprecated to trigger the display of both current and
deprecated providers. If you cannot find your provider in this expanded list, then select
User-Defined from the previous list of database types.
- From the third drop-down list, select the implementation type that is necessary for your
application.
If your application does not require that connections support two-phase
commit transactions, choose
Connection Pool Data Source. Choose
XA
Data Source, however, if your application requires connections that support two-phase
commit transactions. Applications that use this data source configuration have the benefit of
container-managed transaction recovery.
After you select an implementation type, the wizard fills
the name and the description fields for your JDBC provider. You can type different values for these
fields; they exist for administrative purposes only.
- Click Next to see the Enter database class path
information wizard panel.
- In the class path field, type the full path location of the database JDBC driver class
files.
Your class path information becomes the value of the WebSphere® environment variable that is displayed on this panel, in the
form of ${
DATABASE_JDBC_DRIVER_PATH}. The application server uses the variable to define your
JDBC provider; this practice eliminates the must specify static JDBC class paths for individual
applications. Remember that if you do not provide the full, correct JDBC driver class path for the
variable, your data source ultimately fails. If the field already displays a fully qualified class
path, you can accept that variable definition by completing the rest of this wizard panel and
clicking
Next.
Note: The application server supports
multiple versions of the selected JDBC driver for the DataDirect ConnectJDBC type 4 driver for MS
SQL Server. Each version of the JDBC driver has a unique class path. Select the appropriate version
of the JDBC driver so the class path is populated correctly.
- Use the Native library path field to specify additional class files that your JDBC
driver might require to function properly on your application server platform. Type the full
directory path name of these class files.
Avoid trouble: If you are using an Oracle OCI driver as your JDBC
provider, you must specify the path to where the native libraries are stored. If you do not specify
a native library path, the first time you try to connect using this provider, class loader errors
occur.
- Click Next to see a summary of your JDBC provider
settings.
- Click Finish if you are satisfied with the JDBC provider
configuration.
You now see the JDBC provider collection panel, which displays your
new JDBC provider in a table along with other providers that are configured for the same
scope.
What to do next
The next step is to create a data source to associate with your JDBC provider. For detailed
information, see the topic on configuring a data source using the administrative console.
Remember: If you modify configuration of a JDBC provider, like the class path, native library
path, or custom properties, click OK and then restart every application server within the
scope of that JDBC provider. Otherwise, the new configuration does not work and you receive data
source failure messages.