application.yml

app:
  vendor:
    port:
      ABL: 8300
      MENEKIS: 5050

Spring

import org.springframework.boot.context.properties.ConfigurationProperties

@ConfigurationProperties("app.vendor")
data class VendorConfig(
    private val port: Map<String, Int>
) {
    fun getInterfacePort(vendorName: String): Int {
        return port[vendorName] ?: 80
    }
}