Hibernate optimist locking code snippet #6

snippet.groovy

// Transactional service method
void addComment(Photo photo, String text) {
    def comment = new PhotoComment(text: text)
    comment.save()
    photo.addToComments(comment)        
}

// Asynchronous Quartz Job method
void uploadPhoto(Photo p) {
    // do something with S3
    // …
    photo.url = newUrl  
}