Binding using POJOs

Note however you can just as easily write:

Binding JSON POJOs

@Controller("/people")
public class PersonController {
    Map<String, Person> inMemoryDatastore = new ConcurrentHashMap<>();
    @Post
    public HttpResponse<Person> save(@Body Person person) {
        inMemoryDatastore.put(person.getFirstName(), person);
        return HttpResponse.created(person);
    }
}

Binding JSON POJOs

@Controller("/people")
class PersonController {
    ConcurrentHashMap<String, Person> inMemoryDatastore = [:]
    @Post
    HttpResponse<Person> save(@Body Person person) {
        inMemoryDatastore.put(person.getFirstName(), person)
        HttpResponse.created(person)
    }
}

Binding JSON POJOs

@Controller("/people")
class PersonController {
    internal var inMemoryDatastore: MutableMap<String, Person> = ConcurrentHashMap()
    @Post
    fun save(@Body person: Person): HttpResponse<Person> {
        inMemoryDatastore[person.firstName] = person
        return HttpResponse.created(person)
    }
}

Micronaut will only execute your method once the data has been read in a non-blocking manner.