CODEWITHSUNDEEP
spring-boot
user3735178
user3735178

Reputation: 149

Use a Spring Boot @Value where a constant is required

When using Spring Boot, in a Java class marked @Service, I can pull in a configured value from an application.yml file ...

foo:
  bar:
    baz: value

... using @Value ...

@Value("${foo.bar.baz}")
private String fooBarBaz;

Is there a way to use a configured value where a constant is required?

@KafkaListener(topics = HERE)
public void listen(String message) {

If I substitute "${foo.bar.baz}" for HERE, that just puts the constant literal string there instead of reading from my application.yml file, right?

Upvotes: 0

Views: 2226

Answers (1)

zlandorf
zlandorf

Reputation: 1130

You can try using a SpEL expression such as:

@KafkaListener(topics = "#{${foo.bar.baz}}")
public void listen(String message) {

Cf: https://github.com/spring-projects/spring-kafka/issues/361#issuecomment-313200577

Upvotes: 2

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