Hands-On Microservices with Kotlin

Creating a customer service

We can add a new service to handle our customers, so let's create a CustomerService interface:

package com.microservices.chapter4interface CustomerService {  fun getCustomer(id: Int) : Customer?  fun searchCustomers(nameFilter: String): List<Customer>}

Then, we can create our service implementing the interface, CustomerServiceImpl:

package com.microservices.chapter4import com.microservices.chapter4.Customer.Telephoneimport org.springframework.stereotype.Componentimport java.util.concurrent.ConcurrentHashMap@Componentclass CustomerServiceImpl : CustomerService {  companion object {    val initialCustomers = arrayOf(Customer(1, "Kotlin"),        Customer(2, "Spring"),        Customer(3, "Microservice", Telephone("+44", "7123456789" ...