(Quick Reference)

userExists(identity)

Available in Controllers, Domains, Taglibs and Services

This method returns true if the specified user identity is recognized as a valid user by the current security provider.

The implementation of this method is provided by the security provider you have installed.

If a provide does not implement ACLs this will return true.

Usage

class MessagesService {
    void findUserMessages(String user) {
        if (userExists(user)) {
            …
        }
    }
    …
}

Name	Description
identity	The user id of the user. What this is depends on the provider you are using