My overall goal is to validate the response sent by different APIs and forwarded response as request to my API.
and using a discriminator to identify TYPE of object, validate against its raml data type.
Have doubt in How to validate JSON against RAML Datatype?
I found some info on parsing RAML datatype, in last comment here, https://help.mulesoft.com/s/question/0D52T00004mXXa4SAG/how-to-validate-json-object-using-a-raml-datatype
If can explain last comment in detail or some other alternative.
Attaching both RAML file using discriminator and flow.
#%RAML 1.0 Fragment
version: v1
title: My API With Types
types:
Person:
type: object
discriminator: kind
properties:
name: string
kind: string
Employee:
type: Person
discriminatorValue: employee # override default
properties:
employeeId: number
User:
type: Person
discriminatorValue: user # override default
properties:
userId: string
/schema-val:
post:
#description: Retrieve a list of all the users
body:
application/json:
type: Person
responses:
200:
body:
description: http status and message OK
text/html: success
400:
body:
description: error message
text/html: error
Flow xml-
<?xml version="1.0" encoding="UTF-8"?>
<mule
xmlns:ee="http://www.mulesoft.org/schema/mule/ee/core"
xmlns:http="http://www.mulesoft.org/schema/mule/http"
xmlns="http://www.mulesoft.org/schema/mule/core"
xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/ee/core http://www.mulesoft.org/schema/mule/ee/core/current/mule-ee.xsd">
<http:listener-config name="HTTP_Listener_config" doc:name="HTTP Listener config" doc:id="4f571302-95d5-4f0c-a320-e78b01823709" >
<http:listener-connection host="0.0.0.0" port="8081" />
</http:listener-config>
<flow name="responsevalidationFlow" doc:id="88c44a1d-eff1-4f9d-b688-6933579553da" >
<http:listener doc:name="Listener" doc:id="c8826a0f-fa70-4714-a751-2eb5a54d2f09" allowedMethods="POST" path="/schema-val" config-ref="HTTP_Listener_config"/>
<set-payload value="#payload" doc:name="Set Payload" doc:id="794b25c3-301b-4082-a309-72adcc7ed25f" />
<logger level="INFO" doc:name="Logger" doc:id="62cac08d-3fd2-491d-bbfd-2a1888635b87" message="#payload"/>
<ee:transform doc:name="Transform Message" doc:id="83d88fcc-657b-42f6-987f-87578728abf2" >
<ee:message >
<ee:set-payload >
<![CDATA[%dw 2.0
output application/java
---
{
name: payload.name,
kind: payload.kind,
employeeId: payload.employeeId,
userId: payload.userId
}]]>
</ee:set-payload>
</ee:message>
</ee:transform>
<logger level="INFO" doc:name="Logger" doc:id="69fb1f31-6fc1-4904-bbb4-9c0f9cf35722" message="#payload"/>
<set-variable value="#payload.kind" doc:name="Set Variable" doc:id="9958d86f-cd2e-4e9f-aa5c-a6efab3ed8ae" variableName="kind"/>
<choice doc:name="Choice" doc:id="b186199b-0a0a-41ad-8353-d377054a9e33" >
<when expression="#vars.kind=='employee'">
<logger level="INFO" doc:name="Logger" doc:id="e75961d3-001c-421e-aaf4-1f04dd6a01a1" message='"in employee"'/>
</when>
<when expression="#vars.kind=='user'">
<logger level="INFO" doc:name="Logger" doc:id="23ce14a9-94c1-4af3-b047-607dda35ce36" message='"in user"'/>
</when>
<otherwise >
<logger level="INFO" doc:name="Logger" doc:id="aa5471ed-5944-4c72-8628-93b83cc0e31d" message='"in default"'/>
</otherwise>
</choice>
</flow>
</mule>
Expected Output
When I hit http://localhost:8081/schema-val with below payloads
{ "name": "fred", "kind": "employee", "employeeId": "e123" }
{ "name": "barney", "kind": "user", "userId": "u999" }
Then the flow should throw error if employeeId is not a number maybe, that is invalid request.