Grails service using a method from another service

Question

I'm building a grails app and have come across an issue when trying to instatiate a service, in a different service. Both of the services use a method defined in the other eg.

class fooService{
    def barService
    barService.doIt()

    def getIt(){
    ...
    }
}

class barService{
    def fooService
    fooService.getIt()

    def doIt(){
    ...
    }
}

When I run the app and go to where the methods are used, it brings up this error;

Error creating bean with name 'fooService': 
org.springframework.beans.factory.FactoryBeanNotInitializedException: FactoryBean is 
not fully initialized yet

Is this something that cannot be done in grails? Or could anyone offer any advice?

Thanks

Answer 1

I've had similar issues in the past, but only when both services are transactional. If it's possible to make at least one of them non-transactional then it should work as-is. If that's not possible then the fallback is to do a kind of "late binding"

class FooService {
  def grailsApplication
  private getBarService() {
    grailsApplication.mainContext.barService
  }

  public methodThatUsesBarService() {
    barService.doSomething()
  }
}

This will look up barService in the app context at the point where it is used, rather than at the point where the FooService is created.