Preparing a WebHook in Fn
The Fn Project works best with functions written in Java. When calling a function, the framework would be able to automatically transform the body of the request as a parameter of the entrypoint method. In the following example, the JSON from the request will be converted into a string for the handleRequest method, the entrypoint method of this Fn function:
public Object handleRequest(String body) {
if (body == null || body.isEmpty()) {
body = "{}";
}
Input input;
try {
val mapper = new ObjectMapper();
input = mapper.readValue(body, Input.class);
} catch (IOException e) {
return new Error(e.getMessage());
}
if (input == null) {
return new Error(body);
}
/* process the rest of business logic */
}Here's the list of data transfer object (DTO) classes to properly encode and decode Parse's WebHook messages inside an Fn function. With help from Project Lombok and Jackson, we can dramatically...
