CODEWITHSUNDEEP
javaspringspring-annotations
Steve
Steve

Reputation: 4695

Set common variable in Spring Configuration

I have a Java Spring Configuration class like this. I want to set a variable that several of my beans depend on, turn it into a bean, and use it as a dependency. How can I make the setVariable() method happen first? I'm converting my code from Guice, where this variable was being set in the overridden 'Configuration' method. Does Spring have something like that?

@Configuration
class SpringConfiguration{
    String variable;

    public void setVariable(){
        variable = System.getenv("whatever")
    }

    @Bean
public void variable(){
    return variable;
}

    @Bean
    public void myService(){
        return new MyService(variable);
    }

    @Bean
    public void myService2(){
        return new MyService2(variable);
    }

Upvotes: 2

Views: 565

Answers (1)

Mouad EL Fakir
Mouad EL Fakir

Reputation: 3759

You can do something like this :

@Configuration
class SpringConfiguration {

    @Bean(name="variable")
    public String geVariable() {
        return System.getenv("whatever");
    }

    @Bean
    @DependsOn("variable")
    public MyService getMyService() {
        return new MyService(geVariable());
    }

    @Bean
    @DependsOn("variable")
    public MyService2 getMyService2() {
        return new MyService2(geVariable());
    }
}

Like that you can insure that variable will be initialized before service1 and service2, note that DependsOn in this case is just for clarification purposes.

Upvotes: 3

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