when using @Value spring annotation, is it possible to leverage some sort of string interpolation?

Question

Can I do something like this?

private final static String myVar = "health.xyz.throughput";

@Value("${{myVar}:10}")   // doesn't work of course
private Integer healthThroughput;

Essentially myVar key is getting used elsewhere so wanted to see if it can be moved to a constant?

Related: https://stackoverflow.com/questions/10636201/java-annotations-values-provided-in-dynamic-manner — Hulk, Apr 20 '23 at 04:51

score 1 · Accepted Answer · answered Apr 20 '23 at 05:50

Yes its possible:

  private static final String myVar = "health.xyz.throughput";

  @Value("${" + myVar + ":10}")
  private Integer healthThroughput;

Also you can use:

  private static final String myVar = "${health.xyz.throughput:10}";

  @Value(myVar)
  private Integer healthThroughput;

1 Answers1