Enrich Json with new elements not working for me .Please guide

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Enrich Json with new elements not working for me .Please guide.

Input request :

 {
        "id" : "1",     
        "make" : "NAHB"
    }

I created wso2 flow named eg1.xml . I am trying to enrich the incoming json request with new element "name"

processing xml: (eg1.xml)

 <?xml version="1.0" encoding="UTF-8"?>
    <api context="/eg1" name="eg1" xmlns="http://ws.apache.org/ns/synapse">
        <resource methods="POST GET" uri-template="/hi">
            <inSequence>
                <log level="full"/>
                <log level="custom">
                    <property expression="//jsonObject" name="msg1"/>
                </log>
                <enrich description="">
                    <source clone="true" type="inline">
                        <name xmlns="">Home</name>
                    </source>
                    <target action="child" xpath="//jsonObject"/>
                </enrich>
                <log level="custom">
                    <property expression="//jsonObject" name="msg2"/>
                </log>
                <log level="full"/>
                <respond/>
            </inSequence>
            <outSequence/>
            <faultSequence/>
        </resource>
    </api>

current output :

 {
        "id" : "1",     
        "make" : "NAHB"
    }

Desired output :

 {
        "id" : "1",     
        "make" : "NAHB"
        "name" : "Home"
    }

logger output :

Logger1 output(log level full) : LogMediator To: /eg1/hi, MessageID: urn:uuid:2f627daf-ac9c-4492-84ea-2736670724e8, Direction: request, Payload: 

   {
        "id": "1",
        "make": "NAHB"
    }

Logger2 output : LogMediator msg1 = 

 <jsonObject>
        <id>1</id>
        <make>NAHB</make>
    </jsonObject>

Logger3 output : LogMediator msg2 = 

 <jsonObject>
        <id>1</id>
        <make>NAHB</make>
        <name>Home</name>
    </jsonObject>

Logger4 output(log level full) : LogMediator To: /eg1/hi, MessageID: urn:uuid:2f627daf-ac9c-4492-84ea-2736670724e8, Direction: request, Payload:

{ "id": "1", "make": "NAHB" }

Postman output :

 {
        "id": "1",
        "make": "NAHB"
    }

Regards, Aditya

wso2-esb wso2
2 Answers

you have 3 ways to do it:

  1. Enrich mediator: as described in the other answers

  2. Payload Factory mediator: will require adding all the parameters in the arguments unless the new element will be in a separate sub element

  3. Script mediator:

                 <script language="js">
             <![CDATA[
                 var payload = mc.getProperty('payloadProperty'); // if original json is in property. If received as payload use: mc.getPayloadJSON();
                var json =  JSON.parse(payload);
                 var newElement = mc.getProperty('newElement'); // get the value of the new element
                 json.newElementName = newElement; // define it (newElementName not present in the json in the original payload
                 mc.setPayloadJSON(json); // put the result back as payload. Optional: read it in a property as done below if needed, otherwise just call the next service
            ]]>
        </script>
        <property expression="json-eval($)" name="json" scope="default" type="STRING"/>
user_82941180
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