Before you start

These instructions are intended for users familiar with Tomcat and the database they are using. Examples using the H2 embedded database are included throughout to help beginners.

Unless you are using H2 embedded, you must have a database before creating a data source (see Mandatory: Create the databases).

For a list of supported databases, consult the platform support details available on the IBM® support site External link opens a new window or tab.

Before you start, take the following actions:

  1. Delete any previous decisioncenter, decisioncenter, and decisioncenter-api installations in the /temp and /webapps directories under the Tomcat directory <CATALINA_HOME>. This ensures that Tomcat recompiles the JavaServer Pages.

  2. Set CATALINA_HOME as an environment variable.

  3. Set JRE_HOME or JAVA_HOME as an environment variable.

After finishing the configuration, you can sign in to the Decision Center consoles, but there is no decision service project initially. You must publish one from Rule Designer.

Note: If you have projects created with a previous product version, refer to the Migrating topics to see if you need to migrate the Decision Center database schema.