EventRule Element (ADF)

Provides the definition of a single subscription event rule.

Syntax

<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	EventRules Element (ADF)
Child elements	RuleName Element for EventRule (ADF) Action Element for EventRule (ADF) OR ConditionAction Element (ADF) ActionTimeout Element for EventRule (ADF) EventClassName Element for EventRule (ADF)

Remarks

An EventRule element can contain either an Action element or a ConditionAction element, not both.

Example

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 &lt;= E.StockPrice
    AND S.StockTriggerPrice &gt; 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>

See Also

Reference

Application Definition File Reference

Other Resources

Defining Event Rules
Updating Instances and Applications

Help and Information

Getting SQL Server 2005 Assistance