Hands-On Microservices with Kotlin

Defining request parameters

Now, we can improve our mapping by adding request variables that we can use to further understand the request, but first, let's create a new method in our controller to return a list of customers:

@RequestMapping(value = "/customers", method = arrayOf(RequestMethod.GET))fun getCustomers() = customers.map(Map.Entry<Int, Customer>::value).toList()

If we invoke this new URL http://localhost:8080/customers, in our microservice, we will get this result:

[{"id":1,"name":"Kotlin"},{"id":2,"name":"Spring"},{"id":3,"name":"Microservice"}]

We have just transformed our map of customers into a list, and outputted in a new method. But now if we need to filter our customer list, for example, by some part of the customer name, ...