Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved


Chapter 4 Monitoring with Rulebases : Tests

Tests
The data source of a rule provides information about some condition on a managed node. After information is received, one or more tests are applied to evaluate it. Each sample of data from the data source is distributed to all tests in the rule. Each test uses the data to compute a true or false value which is used in determining when to trigger actions.
Evaluation intervals for a test depend on the type of data source used by the rule. Synchronous data sources return results to the agent at regularly scheduled intervals, where an asynchronous data source transmits data whenever it becomes available.
Test transitions, or changes between values of successive tests, can be one of four types: false to true, true to true, true to false, and false to false. By default, tests on synchronous data sources become true whenever the test expression is true, then become false the first time the test is false. Tests on asynchronous data sources, however, become false by default only after 15 minutes have passed since the last true evaluation.
Compound Tests
A compound test uses the same operators as a simple test, but allows you to combine multiple expressions using the logical operators AND, NOT, and OR. You can group expressions and insert operators in the compound test editor.
Advanced Test Features
A test can include the test expression (such as Processes > 10) and any extra conditions, such as counters, timers and additional tests. These advanced options add extra requirements for a test to evaluate as true or false.

Copyright © TIBCO Software Inc. All Rights Reserved
Copyright © TIBCO Software Inc. All Rights Reserved