AbstractUserService.java

package com.feth.play.module.pa.service;

import com.feth.play.module.pa.PlayAuthenticate;
import com.feth.play.module.pa.user.AuthUser;
import play.Logger;

public abstract class AbstractUserService implements UserService {

    protected PlayAuthenticate auth;

    public AbstractUserService(PlayAuthenticate auth) {
        this.auth = auth;
        onStart();
    }

    protected void onStart() {
        if (this.auth.hasUserService()) {
            final String oldServiceClass = this.auth.getUserService().getClass().getName();

            Logger.warn("A user service was already registered - replacing the old one (" + oldServiceClass + ") with the new one (" + getClass().getName() + "), " +
                    "however this might hint to a configuration problem if this is a production environment.");
        }
        this.auth.setUserService(this);
    }

    @Override
    public AuthUser update(AuthUser knownUser) {
        // Default: just do nothing when user logs in again
        return knownUser;
    }
}