How do i send json payload to endpoint and fill in header variable "key" in wso2 MI?

Question

In WSO2 MI i have sequence that every 5 minutes reads from DB and logs what it got , i need send these data (in JSON format) and fill in header with "key" (some text and numbers) to endpoint. After successful sending (POST) i need to update what i sent so it will not be sent again (updating column sent from null to 1)

i use integration studio for this project

i am unsure how call mediator works (i am junior in wso2 mi), i am pretty sure that call is the way how to achieve it but in almost every example i saw there was no sending payload just calling GET and working with response

Answer 1

You can use the PayloadFactory Mediator to create the payload. Then use the property mediator or the Header Mediator to set a Transport Header. Finally, use a Call Mediator to send to message to the Endpoint. After the call mediator, you can check the response and do whatever you need.

<property name="Authorization" expression="$ctx:something" scope="transport" />

OR

<header name="Accept" value="image/jpeg" scope="transport"/>

PL Factory

<payloadFactory media-type="json">
    <format>{"newValue" : "$1"}</format>
    <args>
       <arg evaluator="xml" expression="$ctx:someProperty">
    </args>
 </payloadFactory>

Call Mediator

<call>
    <endpoint>
       <http method="post" uri-template="http://localhost:8080/MockService1"/>
    </endpoint>
</call>