Triggering an Event using multiple patterns

You can define multiple patterns that you use to set up rules for triggering the XMLIN Event. A rule can be an AND or OR statement, or a combination of both. For example:

Pattern1 OR (Pattern2 AND Pattern3)

Valid characters for the pattern IDs in a rule

A-Z

a-z

0-9

_ (underscore)

. (dot)

To create a rule

1	In the Message view, select the Message node. The Message properties are displayed in the Properties view.

2	In the Rule field, enter the rule.

Example 8

Pizzas and drinks

The patterns pizzas and drinks match the elements <pizzas> and <drinks> in the sample below.

...

<pizzas>

  <pizza>Calzone</pizza>

  <pizza>Primavera</pizza>

</pizzas>

<drinks>

  <drink>Manhattan</drink>

</drinks>

...

Rule 1:

pizzas AND drinks

The StreamServer scans the input and finds a match in <pizzas>. The StreamServer continues to scan the input and finds a match in <drinks>. The rule is fulfilled, and the Event is triggered. The Event is triggered once in this scenario.

Rule 2:

pizzas OR drinks

The StreamServer scans the input and finds a match in <pizzas>. The rule is fulfilled, and the Event is triggered. The StreamServer continues to scan the input and finds a match in <drinks>. The rule is fulfilled, and the Event is triggered once more. The Event is triggered twice in this scenario.