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grailsgroovyserviceapplication-lifecycle

Best way for a Grails Service class to detect application shutdown?

I have a Grails service class that needs to do some cleanup when my Tomcat application server is shut down.

I don't see anything in the Grails docs about a service.stop() or destroy() method, or a way to implement any sort of application lifecycle listener.

What's the best way to do this?

Thanks!

Solution

  • You have a couple of options

    Make your service implement org.springframework.beans.factory.DisposableBean

    class MyService implements org.springframework.beans.factory.DisposableBean {

    void destroy() throws Exception {

    }
}

    Or use an annotation

    class MyService {

    @PreDestroy
    private void cleanUp() throws Exception {

    }
 }

    IMO, the annotation option is preferable, because you can give your destructor method a more meaningful name than destroy and your classes public API doesn't expose the Spring dependency