EventRules Element (ADF)
Provides a location for all of the subscription event rule definitions for one subscription class.
Syntax
<SubscriptionClasses>
<SubscriptionClass>
...
<EventRules>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Optional once per SubscriptionClass element. |
Updates |
Can be added and deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
Example
The following example shows an EventRules element and its child elements. The rule creates event-driven notifications, and also loads notification data into the StockSubscriptionChron table. It is executed whenever an event batch containing events of the StockEvents class is processed. This rule is permitted one minute to complete successfully.
<EventRules>
<EventRule>
<RuleName>StockSubscriptionEventRule</RuleName>
<Action>
-- Generate notifications from event and chronicle data
INSERT INTO StockNotifications
( SubscriberId, DeviceName, SubscriberLocale,
StockSymbol, StockPrice )
SELECT S.SubscriberId, S.DeviceName,
S.SubscriberLocale, E.StockSymbol, E.StockPrice
FROM StockSubscriptions S JOIN StockEvents E
ON S.StockSymbol = E.StockSymbol
JOIN StockEventChron C
ON S.StockSymbol = C.StockSymbol
WHERE S.StockTriggerPrice <= E.StockPrice
AND S.StockTriggerPrice > C.StockHighPrice
-- Update subscription chronicle
INSERT StockSubscriptionChron
(SubscriberId, StockSymbol, StockPrice)
SELECT S.SubscriberId, S.StockSymbol, E.StockPrice
FROM StockSubscriptions S JOIN StockEvents E
ON S.StockSymbol = E.StockSymbol
</Action>
<ActionTimeout>P0DT00H01M00S</ActionTimeout>
<EventClassName>StockEvents</EventClassName>
</EventRule>
</EventRules>
See Also
Reference
Application Definition File Reference
Other Resources
Defining Event Rules
Updating Instances and Applications