SessionUser.java

package io.lumify.web;

import com.google.inject.Inject;
import io.lumify.core.bootstrap.InjectHelper;
import io.lumify.core.model.user.UserRepository;
import io.lumify.core.model.user.UserSessionCounterRepository;
import io.lumify.core.model.workQueue.WorkQueueRepository;
import io.lumify.core.user.User;
import io.lumify.core.util.LumifyLogger;
import io.lumify.core.util.LumifyLoggerFactory;
import io.lumify.web.clientapi.model.UserStatus;

import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import java.io.Serializable;

public class SessionUser implements HttpSessionBindingListener, Serializable {
    private static final long serialVersionUID = -4886360466524045992L;
    private static final LumifyLogger LOGGER = LumifyLoggerFactory.getLogger(SessionUser.class);
    private String userId;

    public SessionUser(String userId) {
        this.userId = userId;
    }

    public String getUserId() {
        return userId;
    }

    @Override
    public void valueBound(HttpSessionBindingEvent event) {
        // do nothing
    }

    @Override
    public void valueUnbound(HttpSessionBindingEvent event) {

        try {
            UserSessionCounterRepository userSessionCounterRepository = InjectHelper.getInstance(UserSessionCounterRepository.class);
            WorkQueueRepository workQueueRepository = InjectHelper.getInstance(WorkQueueRepository.class);

            int sessionCount = userSessionCounterRepository.decrementAndGet(userId);
            if (sessionCount < 1) {
                UserStatus status = UserStatus.OFFLINE;
                LOGGER.info("setting userId %s status to %s", userId, status);
                UserRepository userRepository = InjectHelper.getInstance(UserRepository.class);
                User user = userRepository.setStatus(userId, status);
                workQueueRepository.pushUserStatusChange(user, status);
            } else {
                workQueueRepository.pushSessionExpiration(userId, event.getSession().getId());
            }
        } catch (Exception ex) {
            LOGGER.error("exception while unbinding user session for userId:%s", userId, ex);
        }
    }
}