EventRule Element (ADF)
Provides the definition of a single subscription event rule.
语法
<SubscriptionClasses>
<SubscriptionClass>
...
<EventRules>
<EventRule>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Required once or more per EventRules element. |
Updates |
Can be added and deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
RuleName Element for EventRule (ADF) Action Element for EventRule (ADF) OR |
备注
An EventRule element can contain either an Action element or a ConditionAction element, not both.
示例
The following example shows an EventRule element that uses an Action. 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.
<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>
请参阅
参考
Application Definition File Reference