Is there way to build variable value based on another variable value in application.yaml?

Question

Let's say I have following application.yaml:

my:
  key1: key1Value
  key2: key2Value
  key3: key1 + _ + key2

It is an attemp to assign the property my.key3="key1Value_key2Value"

But it doesn't work.

Is there way in spring-boot to have such kind of references in application.yml ?

Answer 1

You can use property placeholders in the application.yaml as follows:

my:
  key1: key1Value
  key2: key2Value
  key3: ${my.key1}_${my.key2}