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10.2. Integrate Derby with JBoss Fuse
Integrating Derby with Red Hat JBoss Fuse is a relatively simple procedure. All you need to do is to set a single Java system property, which specifies the location of the Derby system.
A Derby system is essentially the directory where all of Derby's data is stored. A Derby system can contain multiple database instances, where each database instance holds its data in a sub-directory of the Derby system directory.
derby.system.home Java system property
You are required to set one Java system property to configure the Derby system: the
derby.system.homeJava system property, which specifies the location of the Derby system directory.
Setting derby.system.home in the OSGi container
In order to integrate Derby with JBoss Fuse, you must set the
derby.system.homeproperty in the OSGi container. Under the JBoss Fuse install directory, open the
etc/system.propertiesfile using a text editor and add the following line:
Where DerbySystemDirectory is any convenient location for storing your Derby data files. After setting the
derby.system.homeproperty, any Derby database instances created in the OSGi container will share the same Derby system (that is, the database instances will store their data under the specified Derby system directory).