Preface
RulePoint
RulePoint Concepts
- RulePoint Concepts Overview
- Understanding RulePoint Entities
Using RulePoint
RulePoint Objects
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- State of RulePoint Objects
Working with Topics
Working with Connections
Working with Sources
Working with Responders
Working with Responses
Working with Watchlists
Working with Analytics
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- Copying an Analytic
- Editing an Analytic
- Deleting an Analytic
- Viewing Related Objects
- Predefined Analytics
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- Predefined Operators
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- Using the distinct, group by, and ummatched Filters
DRQL
Working with Rules
Working with Alerts
Setting Access Controls
Troubleshooting RulePoint Issues
Connecting to an Ultra Messaging Application
Creating an Ultra Messaging JMS Source

User Guide

6.1.2
- 6.2
- 6.1

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Specifying Event Set Behavior

When selecting topics, you can specify an event set behavior to describe how you want RulePoint to dispose of events after they have participated in the activation of a rule.

The following event set behaviors are available and are listed in priority order:

removeAll. Evaluate each event once and then remove all participating events from future evaluation. This is the default value. You can use the removeAll behavior if you do not want to specify another behavior in the rule.

removeOldest. Remove the oldest participating event from future evaluation.

removeNone. Keep all participating events and use them in future evaluation.

removePrevious. Remove all previous events and keep only the latest event in future evaluation

You would change the default behavior if you want to reevaluate the prior events along with new events.

For example, the events E1, E2, and E3 activate the following rule:

WHEN 3 stock WITH symbol = "XYZ"

Event ID	Time stamp
E1	10:14am
E2	10:20am
E3	10:30am

Based on which behavior that you specify, the events are either removed or kept for future rule evaluation as shown in the following table:

Event Set Behavior	Events Removed after Activation	Event Remaining after Activation
remove all	E1, E2, E3	-
remove oldest	E1	E2, E3
remove none	-	E1, E2, E3
remove previous	E1, E2	E3

You can specify a different behavior for each topic in a rule. To do so, place the topic name or topic alias in parentheses after the appropriate behavior. For example, in the following rule, the DailyStockInfo topic generates events with historical statistics for stocks:

WHEN 1 stock, 1 DailyStockInfo with sum(stock.price) as x >10 then response remove all(stock), none(DailyStockInfo)

If you create a rule that compares current stock events with historical stock events, you might want to remove all stock events but keep all DailyStockInfo events.

If you use more than one behavior with one topic, the behavior with the higher priority takes precedence.

You can define the same event set behavior using topic aliases:

WHEN 1 stock s, 1 DailyStockInfo d WITH sum(s.price) as x >10 then response remove all(s) and none(d)

You also can specify one behavior for multiple topics at the same time. To do so, place the comma separated topic aliases in parentheses after the behavior as shown in the following rule:

WHEN 1 stock s, 1 dailystockinfo d WITH sum(s.price)>10 then response remove none(s,d)

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Table of Contents

User Guide

User Guide

Specifying Event Set Behavior

Specifying Event Set Behavior