actors.SessionCleaner.java Source code

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Here is the source code for actors.SessionCleaner.java

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/*
 * Sentilab SARE: a Sentiment Analysis Research Environment
 * Copyright (C) 2013 Sabanci University Sentilab
 * http://sentilab.sabanciuniv.edu
 * 
 * This file is part of SARE.
 * 
 * SARE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * SARE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with SARE. If not, see <http://www.gnu.org/licenses/>.
 */

package actors;

import java.util.*;

import javax.persistence.*;

import org.apache.commons.lang3.time.DateUtils;

import play.*;

import models.web.*;
import models.web.WebSession.SessionStatus;

import com.avaje.ebean.*;

import controllers.base.*;

import edu.sabanciuniv.sentilab.sare.controllers.entitymanagers.*;
import edu.sabanciuniv.sentilab.sare.models.base.documentStore.PersistentDocumentStore;
import edu.sabanciuniv.sentilab.utils.UuidUtils;

import akka.actor.*;

public class SessionCleaner extends UntypedActor {

    private static int getTimeout() {
        Integer timeout = Play.application().configuration().getInt("application.session.timeout");
        return timeout == null ? 60 : timeout;
    }

    public static boolean clean(WebSession session, boolean timedout, boolean forceCleanup) {
        if (session == null) {
            return false;
        }

        Logger.info("deleting session " + UuidUtils.normalize(session.getId()));
        List<ProgressObserverToken> poTokens = ProgressObserverToken.find.where().eq("session", session).findList();
        for (ProgressObserverToken poToken : poTokens) {
            poToken.delete();
        }

        if (session.getStatus() == SessionStatus.ALIVE || forceCleanup) {
            session.setStatus(timedout ? SessionStatus.TIMEDOUT : SessionStatus.KILLED);
            session.update();

            // if the session is not authenticated, delete all stores owned.
            if (!SessionedAction.isAuthenticated(session)) {
                EntityManager em = SareTransactionalAction.createEntityManager();
                em.getTransaction().begin();

                // delete all owned stores.
                for (String uuid : new PersistentDocumentStoreController().getAllUuids(em,
                        UuidUtils.normalize(session.getId()))) {
                    Logger.info("deleting store " + uuid + " owned by " + UuidUtils.normalize(session.getId()));
                    PersistentDocumentStore store = em.find(PersistentDocumentStore.class, UuidUtils.toBytes(uuid));
                    if (store != null) {
                        em.remove(store);
                    }
                }

                em.getTransaction().commit();
                em.close();
            }
        }

        return true;
    }

    public static boolean clean(WebSession session, boolean timedout) {
        return clean(session, timedout, false);
    }

    public static boolean clean(WebSession session) {
        return clean(session, false);
    }

    public static boolean isSessionValid(WebSession session) {
        if (session == null) {
            return false;
        }

        return session.getStatus() == SessionStatus.IMMORTALIZED || (session.getStatus() == SessionStatus.ALIVE
                && session.getUpdated().after(DateUtils.addMinutes(new Date(), -getTimeout())));
    }

    @Override
    public void onReceive(Object message) throws Exception {
        try {
            Ebean.execute(new TxRunnable() {
                @Override
                public void run() {
                    Logger.info("cleaning sessions");

                    int timeout = getTimeout();
                    if (timeout != 0) {
                        // get all old sessions.
                        List<WebSession> oldSessions = WebSession.find.where().eq("status", SessionStatus.ALIVE)
                                .lt("updated", new Date(DateUtils.addMinutes(new Date(), -timeout).getTime()))
                                .findList();

                        // clean each.
                        for (WebSession session : oldSessions) {
                            clean(session, true);
                        }
                    }
                }
            });
        } catch (Throwable e) {
            Logger.error("error cleaning sessions", e);
        }
    }
}