[Dev] Sending POST request to ESB with optional parameters

[Elilmatha Sivanesan]

I'm trying to create a eventbrite connector for WSO2 ESB. After creating
the connector I have added the connector to ESB. Then I want to test it. My
file look like this

<?xml version="1.0" encoding="UTF-8"?>
<template name="eventAttendees" xmlns="http://ws.apache.org/ns/synapse";>
    <parameter name="EventID" description="Full-text search query string." />


    <parameter name="status" description="status" />
    <parameter name="changedSince" description="changed_since." />
    <parameter name="expand" description=" expand." />
    <parameter name="parameters" description=" parameters." />

    <sequence>
        <property name="uri.var.EventID" expression="$func:EventID" />
        <property name="uri.var.accessToken" expression="$func:accessToken" />

        <property name="uri.var.status" expression="$func:status" />
        <property name="uri.var.changed_since"
expression="$func:changed_since" />
        <property name="uri.var.expand" expression="$func:expand" />

        <property name="eventbrite.parameters" value=""/>

          <filter
               xpath="get-property('uri.var.status') = '' or
not(string(get-    property('uri.var.status')))" >
             <then>
                <property name="uri.var.status" value=""/>
            </then>
             <else>
                <property name="eventbrite.parameters"
expression="fn:concat(get-property('eventbrite.parameters'),
            '&amp;status=', get-property('uri.var.status'))"/>
            </else>
        </filter>

        <filter
            xpath="get-property('uri.var.changed_since') = '' or
not(string(get-property('uri.var.changed_since')))" >
            <then>
                <property name="uri.var.changed_since" value=""/>
            </then>
            <else>
                <property name="eventbrite.parameters"
expression="fn:concat(get-property('eventbrite.parameters'),
            '&amp;changed_since=', get-property('uri.var.changed_since'))"/>
             </else>
         </filter>

         <filter
            xpath="get-property('uri.var.expand') = '' or
not(string(get-   property('uri.var.expand')))" >
             <then>
                <property name="uri.var.expand" value=""/>
            </then>
                <else>
                 <property name="eventbrite.parameters"
expression="fn:concat(get-property('eventbrite.parameters'),
            '&amp;expand=', get-property('uri.var.expand'))"/>
             </else>
         </filter>

        <property name="uri.var.parameters"
expression="get-property('eventbrite.parameters')" />
        <call>

             <endpoint>
                <http method="get"

uri-template="https://www.eventbriteapi.com/v3/events/{uri.var.EventID}/attendees/?{uri.var.parameters}&amp;token={uri.var.eventbrite.accessToken}";
/>
             </endpoint>
        </call>
    </sequence>
</template>


After I have configured a custom proxy service within the ESB like this:

 <?xml version="1.0" encoding="UTF-8"?>
      <proxy xmlns="http://ws.apache.org/ns/synapse";
       name="eventAttendees"
       transports="https,http"
       statistics="disable"
       trace="disable"
       startOnLoad="true">
    <target>
        <inSequence>
          <event_brite.init>
             <accessToken>NDYKPVXF2E36W57EB5B2</accessToken>
          </event_brite.init>
         <property name="EventID" expression="json-eval($.EventID)"/>
         <property name="status" expression="json-eval($.status)"/>
         <property name="changed_since"
expression="json-eval($.changed_since)"/>
         <property name="expand" expression="json-eval($.expand)"/>
         <event_brite.eventAttendees>
            <EventID>{$ctx:EventID}</EventID>
            <status>{$ctx:status}</status>
            <changed_since>{$ctx:changed_since}</changed_since>
            <expand>{$ctx:expand}</expand>
            </event_brite.eventAttendees>
            <respond/>
         </inSequence>
        <outSequence>
        <log/>
         <send/>
      </outSequence>
     </target>
   <description/>
</proxy>



then whn i test it in postman
http://elilmathas-MacBook-Pro.local:8280/services/eventAttendees
<http://elilmathas-macbook-pro.local:8280/services/eventAttendees> with
parameters

{"EventID":"12792941031","status":"Attending", }

it works ,But the out put i get gives all the vales ie if i give the
parameters as

{"EventID":"12792941031","status":"Not_Attending", }

i get the same out put which i got for the first one IT IS NOT FILTERED.
What can be the problem?

-- 
*S.Elilmatha*
Associative Software Engineer,

WSO2 Inc.; http://wso2.com
lean.enterprise.middleware

Mobile 0779842221.

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