Apache Camel: Validate RESTful JSON input based on databse base content - apache-camel

Question

Summary
A RESTful POST request POST /request/{requestName}
POST /request/CreateProduct
{
"Code": 4711,
"Name": "My product"
}
is to be validated:
if the given ${header.requestName} has a corresponding row in the
database and
if the provided parameters match the requestName
according to another table in the database, specifially if all required params are present and have the correct data type
Current route sample config
restConfiguration().component("netty4-http").port(8080).bindingMode(RestBindingMode.json);
rest("request/{requestName}").post()
.consumes("application/json; charset=UTF-8")
.produces("application/json; charset=UTF-8")
.to("direct:newRequest");
from("direct:newRequest").transform().simple("Received request: ${header.requestName}, Body: ${in.body}");
DB tables (MariaDB) to validate against
Table: request
id | name
------------------
1 | CreateProduct
2 | UpdateProduct
3 | DeleteProduct
Table: request_parameter
id | name | type
-------------------
1 | Code | INT
2 | Name | STRING
2 | Price | INT
Table request_to_parameter
request | paramater | required
------------------------------
1 | 1 | 1
1 | 2 | 1
1 | 3 | 0
Question
Is this possible with pure Camel? Or should I implement my own helper function? How to I include my own custom function in a Camel route?

Answer 1

You can implement a customer processor as described here:
http://camel.apache.org/processor.html
With the Exchange object you have access to header and body and can extract the necessary information to validate.