Set common variable in Spring Configuration

Question

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);
    }

Possible duplicate of [How to call a method after bean initialization is complete?](http://stackoverflow.com/questions/1088550/how-to-call-a-method-after-bean-initialization-is-complete) — Jeremy, Mar 04 '17 at 22:59

score 3 · Accepted Answer · answered Mar 04 '17 at 23:06

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.

Set common variable in Spring Configuration

1 Answers1