The system uses filters as a technology for many of its most important features, including Watchpoints and traffic regulation. Filters are reusable rules for isolating subsets of web traffic monitored by Watchpoints. You use them to evaluate individual objects and pages in real time as they are detected.
The other examples of using filter expressions include:
The following topics provide information and instructions for working with filters:
You can add filters to a Watchpoint in the following ways:
To filter a specific segment of traffic for a Watchpoint, you can use advanced queries with AND and OR conditions.
The result of any filter evaluation is a Boolean value (true or false) indicating whether an object or page satisfies the criteria that you specified for the filter.
As conditional statements, filters enable you to control the behavior of various features, basing the behavior on elements of the data itself (for example, storing objects if they have a certain host name).
Filters are based on BMC Real End User Experience Monitoring Software Edition grammar syntax, which supports the following concepts:
The system supports the following data types and collections:
You can use the following types of comparison:
Modifications that you make to the predefined filters are applied only to the current Watchpoint. They are not propagated into the Filter library. For the changes to be saved in the Filter library, you must edit the filter directly in the Filter library.
To view the available values for each field (for example, the list of exact countries, where your application was accessed from), use the Getting current traffic values from a filter reference list tab.