To configure a broker to use a JDBC database, you set JDBC-related properties in the broker’s instance configuration file and create the appropriate database schema. The Message Queue Database Manager utility (imqdbmgr) uses your JDBC driver and the broker configuration properties to create the schema and manage the database. You can also use the Database Manager to delete corrupted tables from the database or if you want to use a different database as a data store. See Database Manager Utility for more information.
If you use an embedded database, it is best to create it under the following directory:
If an embedded database is not protected by a user name and password, it is probably protected by file system permissions. To ensure that the database is readable and writable by the broker, the user who runs the broker should be the same user who created the embedded database using the imqdbmgr command.
Set JDBC-related properties in the broker’s instance configuration file.
The relevant properties are discussed, with examples, in JDBC-Based Persistence Properties and listed in full in Table 17–7. In particular, you must specify a JDBC-based data store by setting the broker’s imq.persist.store property to jdbc.
Place a copy of, or a symbolic link to, your JDBC driver’s .jar file in the Message Queue external resource files directory, depending on how Message Queue was installed (see Appendix A, Distribution-Specific Locations of Message Queue Data):
IPS packages: IMQ_HOME/lib/ext
Solaris SVR4 packages: /usr/share/lib/imq/ext
Linux RPM packages: /opt/sun/mq/share/lib/ext
For example, if you are using HADB on an IPS package-based installation, the following command copies the driver’s .jar file to the appropriate location:
cp /opt/SUNWhadb/4/lib/hadbjdbc4.jar IMQ_HOME/lib/ext
The following command creates a symbolic link instead:
ln -s /opt/SUNWhadb/4/lib/hadbjdbc4.jar IMQ_HOME/lib/ext
Create the database schema needed for Message Queue persistence.
Use the imqdbmgr create all command (for an embedded database) or the imqdbmgr create tbl command (for an external database); see Database Manager Utility.
You can display information about a JDBC-based data store using the Database Manager utility (imqdbmgr) as follows:
Change to the directory where the Database Manager utility resides, depending on how Message Queue was installed:
IPS packages: cd IMQ_HOME/bin
Solaris SVR4 packages: cd /usr/bin
Linux RPM packages: cd /opt/sun/mq/bin
Enter the imqdbmgr command:
The output should resemble the following
dbmgr query [04/Oct/2005:15:30:20 PDT] Using plugged-in persistent store: version=400 brokerid=Mozart1756 database connection url=jdbc:oracle:thin:@Xhome:1521:mqdb database user=scott Running in standalone mode. Database tables have already been created.