How to read dynamic query parameter in ESB/APIM synapse.

Following way you will be able to get the dynamic parameters

For e.g

1. My api has the following url  http://xxxx8243/uridynamic/1

2. and i have added a GET resource(uri-template) to api  /add?*
that means there can be zero or many query parameters.

3. Now my get request takes following format

http://xxxx:8243/uridynamic/1/add?a=12&b=234

4. in the sequence you can read the value of ‘a‘ and ‘b‘ as using $url

if a and b is not present in the url value of SYMBOL and value of SYMBOL2 will have

null value.

<log level=”custom”>

            <property name=”SYMBOL” expression=”$url:a“></property>

            <property name=”SYMBOL2″ expression=”$url:c“></property>

 </log>