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When a change to the status of an object is to be performed (that is, when the current and desired status of the object do not match and all prerequisites are satisfied), Control-O/COSMOS needs to select the appropriate Control-O rule to perform the actions that bring the object to its desired status. These rules are referred to as Method rules. Information that indicates which Method rule is appropriate for performing the desired change to an object is stored in Method databases.
Each row in a Method database defines a method. A method consists of the particular type of change and the Method rule that can bring about the change. Each row (method) lists an object, object class, current status, desired status, and the name of the Method rule that is used to affect the desired change.
For example, a row in a Method database may indicate that the method defined in the row is used for modifying an object named CICSTEST with a current status of DOWN and a desired status of UP. When invoked, the Method rule specified in this row performs actions that bring the object to a status of UP.
Multiple Method databases can be defined.
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