The document discusses using the Parse Template component in Mule to load a template file containing MEL expressions into the payload. It provides examples of using values from the payload, flow variables, and inbound properties in the template. It then gives an example of using a parse template to load an external file and populate fields in it with values from the Mule message before setting it as the payload.

1. Ankit Lawaniya

2. The Parse Template component loads a file into the Mule payload.The
'Parse Template' transformer parses a template file that can contain
MEL expressions and places the resulting string into the message
payload.We can use the payload,flowVars and inboundproperties in
the template to create the dynamic content.

3. Use Case 1:
 When we want to prepare the payload to be used by the Web
Service Consumer or for a SOAP request.
Use Case 2 :
 When we want to create a template for emailing.
Use Case 3 :
 There are other scenarions where it can be useful , such as
returning HTML to a client from an HTTP transport.We can load
an HTML file into the payload that includes embedded MEL.
Samples of MEL that we can define in template.
#[message.inboundProperties.'http.query.params'.name]
#[flowVars.syn_accountNumber]
#[payload[0]['order_no']]

4. Let’s walk through how to use JSON Schema validator in Mule
application.
In this example we are receiving the order through HTTP call from the
end user , We are using a parse template to load a file from an external
location – a file which, behaving as a template, expects values for
"order number" ,"Order Description" and "order provisioning date"
.The parse template extracts info from the Mule message variables to
insert as values into the template and set the resulting contents as the
message payload.

8. Request:
[
{
"order_no" : "199",
"order_description" : "PostpaidOrder",
"provisioning_date" : "28/07/2017"
}
]