WSO2 BPS - Sample Guide - IF
Sample Guide - IF
Table of Content
Shows how to use <if/> construct to implement where user need to verify a logical
condition.
- Log in into BPS server admin console.
- Under Business Processes -> Add BPEL.
- Upload the TestIf.zip , (all samples are located at our sample repository.)
- Under the Business Processes -> Processes.
- Under the WSDL details widget -> Create instance
<if><condition>number($tmpVar)=number(2)</condition>
<assign name="assignError">
<copy>
<from>
<literal>Worked</literal>
</from>
<to variable="myVar" part="TestPart"/>
</copy>
</assign>
<else>
<assign name="assignZut">
<copy>
<from>
<literal>Failed</literal>
</from>
<to variable="myVar" part="TestPart"/>
</copy>
</assign>
</else>
</if>
<condition/> inside <if/> is used to implement the logical condition.
Normally a XPath expression is used. <else/> is used to implement false case.
In the above example, value of tmpVar variable, is converted to a number and it's
checked against 2. <condition>number($tmpVar)=number(2)</condition>
Based on the tmpVar value, "TestPart" element value in myVar variable will be "Worked"
or "Failed".
Note - Apache ODE runtime has default support for http://www.w3.org/TR/xpath/, where
the number($var) is defined.
