Using ENUM for Profile, but expecting a String

Question

I'm trying to use an Enum to define the different profiles my Spring application might use.

This is my enum Profiles.java

public enum Profiles {

    DEVELOPMENT("dev"),
    TEST("test"),
    PRODUCTION("prod");

    private final String code;

    private Profiles(String code) {
        this.code = code;
    }
}

I'm using it in a file to configure the properties place holders.

@Configuration
public class PropertyPlaceholderConfig {

    @Profile(Profiles.DEVELOPMENT)
    public static class DevelopmentConfig {
        @Bean
        public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() throws IOException {
            PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
            propertySourcesPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(Boolean.TRUE);
            propertySourcesPlaceholderConfigurer.setLocation(new ClassPathResource("props/application-dev.properties"));
            return propertySourcesPlaceholderConfigurer;
        }
    }

    @Profile(Profiles.TEST)
    public static class TestConfig {
        @Bean
        public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() throws IOException {
            PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
            propertySourcesPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(Boolean.TRUE);
            propertySourcesPlaceholderConfigurer.setLocation(new ClassPathResource("props/application-test.properties"));
            return propertySourcesPlaceholderConfigurer;
        }
    }

    @Profile(Profiles.PRODUCTION)
    public static class ProductionConfig {
        @Bean
        public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() throws IOException {
            PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
            propertySourcesPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(Boolean.TRUE);
            propertySourcesPlaceholderConfigurer.setLocation(new ClassPathResource("application-test.properties"));
            return propertySourcesPlaceholderConfigurer;
        }
    }
}

However it is complaining at @Profile that its getting incompatible types, got Profiles expected String. I feel like I'm missing something really silly.

What are \@Configuration, \@Profile and \@Bean? (ignore the extra \\) — user253751, Mar 23 '15 at 23:24
That is from Spring libraries to configure all the components of the Spring application using different profiles, so I can customize the components and configure depending on what mode the application is running in, dev, test, prod, etc. — jkratz55, Mar 23 '15 at 23:26

score 3 · Answer 1 · edited May 23 '17 at 12:16

I think this will NOT work. I tried it in Java 8 and compiler complains that "Attribute value must be a constant".

As explained here it can only be primitive or String.

Possible solution is:

@Profile(SpringProfiles.TEST)
public static class SpringProfiles {
    public static final String TEST = "test"; 

}

Even thought @Profile expects String[] this works - I guess there is some implicit conversion between String and String[].

score -1 · Accepted Answer · answered Mar 23 '15 at 23:29

-1

Profile expects a String array (implemented as varargs) as its argument

@Profile(Profiles.DEVELOPMENT.name())

answered Mar 23 '15 at 23:29

Reimeus

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Shouldn't the Enum resolve to "dev" since that is the value of Profiles.DEVELOPMENT? – jkratz55 Mar 23 '15 at 23:32
No `name` just returns the name of the enum name. If you want to return `dev` add a getter for the `code` field...:) – Reimeus Mar 23 '15 at 23:34
This will not work, you will get: Attribute value must be constant – Maciej Miklas Mar 28 '23 at 13:49
@MaciejMiklas you are correct. jkratz55 can you uncheck this answer and I will delete? – Reimeus Mar 28 '23 at 17:32

Using ENUM for Profile, but expecting a String

2 Answers2