# Receiving JSON From a Non-Spring Application
Spring AMQP applications communicating over AMQP using JSON add type information to message headers to enable the receiving application to convert the JSON to a class instance.
This sample demonstrates techniques to use for such conversion when the sending application is not a Spring app or if you wish to convert to a different type when receiving messages.
- Inferred type from `@RabbitListener` methods
- Parameterized types in template `receiveAndConvert()` methods
- `ClassMapper` id mapping configuration with a legacy POJO listener.
It is a Spring Boot application and can be run with normal boot run methods, e.g.: `./mvnw spring-boot:run`
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