How to use 'Choice Router' in Anypoint studio for this scenario? - mule

Question

I have used RAML file to generate flows through APIKit router. I have example.json for example response.
My RAML code is:
#%RAML 0.8
---
title: TestEmployee API
version: v1
/employee:
get:
queryParameters:
id:
enum: [1,2,3,4]
required: true
type: string
description: Employee id
name:
enum: [Charles,John,Neha,Shruti]
required: true
type: string
description: Employee_name
responses:
200:
body:
application/json:
example: !include example.json
JSON example response is :
[
{
"id": 1,
"name":"Charles",
"code": "C1ENU00",
"dateofjoining":"2019/06/24",
"domain":"ENU",
"address":"Hyderabad",
"phone": 9865458936,
"program": "WASE"
},
{
"id": 2,
"name":"John",
"code": "C2DIG00",
"dateofjoining":"2019/06/24",
"domain":"DIGITAL",
"address":"Chennai",
"phone": 9756359864,
"program": "ELITE"
}
I want to use a choice router to appropriately call flow when 'id' and 'name' matches. Like in query params if the user enters 'id=1&name=Charles' then only choice router would call main flow, else it should call default one. Initially, the payload is set to 'example JSON response' body. Please guide me achieving this.
Here are flows for reference.

Answer 1

Set the when expression attribute in your choice router to a Dataweave expression matching your use case. You can access queryParams by name using attributes.queryParams.YOUR-QUERY-PARAM-NAME syntax:
#[attributes.queryParams.id=='1' and attributes.queryParams.name=='Charles']
Then add a when scope for every route you need and an optional otherwise for a default route:
<choice>
<when
expression="#[attributes.queryParams.id=='1' and attributes.queryParams.name=='Charles']">
<flow-ref name="some-flow" />
</when>
<otherwise>
<flow-ref name="some-other-flow" />
</otherwise>
</choice>
For Mule 3 use:
#[message.inboundProperties.'http.query.params'.id == '1' && message.inboundProperties.'http.query.params'.name =='Charles']