org.obm.imap.archive.FutureSchedulerBusClient.java Source code

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Here is the source code for org.obm.imap.archive.FutureSchedulerBusClient.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Copyright (C) 2014  Linagora
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version, provided you comply with the Additional Terms applicable for OBM
 * software by Linagora pursuant to Section 7 of the GNU Affero General Public
 * License, subsections (b), (c), and (e), pursuant to which you must notably (i)
 * retain the displaying by the interactive user interfaces of the OBM, Free
 * Communication by Linagora? Logo with the You are using the Open Source and
 * free version of OBM developed and supported by Linagora. Contribute to OBM R&D
 * by subscribing to an Enterprise offer !? infobox, (ii) retain all hypertext
 * links between OBM and obm.org, between Linagora and linagora.com, as well as
 * between the expression Enterprise offer? and pro.obm.org, and (iii) refrain
 * from infringing Linagora intellectual property rights over its trademarks and
 * commercial brands. Other Additional Terms apply, see
 * <http://www.linagora.com/licenses/> for more details.
 * 
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License and
 * its applicable Additional Terms for OBM along with this program. If not, see
 * <http://www.gnu.org/licenses/> for the GNU Affero General   Public License
 * version 3 and <http://www.linagora.com/licenses/> for the Additional Terms
 * applicable to the OBM software.
 * ***** END LICENSE BLOCK ***** */

package org.obm.imap.archive;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import org.obm.annotations.transactional.Transactional;
import org.obm.imap.archive.scheduling.ArchiveSchedulerBus;
import org.obm.imap.archive.scheduling.ArchiveSchedulerBus.Events.TaskStatusChanged;

import com.google.common.base.Throwables;
import com.google.common.collect.Queues;
import com.google.common.eventbus.Subscribe;
import com.google.inject.Inject;
import com.google.inject.Singleton;

@Singleton
public class FutureSchedulerBusClient implements ArchiveSchedulerBus.Client {

    private final ArrayBlockingQueue<TaskStatusChanged> events;

    @Inject
    FutureSchedulerBusClient() {
        events = Queues.newArrayBlockingQueue(10);
    }

    @Subscribe
    @Transactional
    public void onTreatmentStateChange(TaskStatusChanged event) {
        try {
            events.put(event);
        } catch (InterruptedException e) {
            e.printStackTrace();
            Throwables.propagate(e);
        }
    }

    public TaskStatusChanged next(int timeout, TimeUnit unit) throws Exception {
        TaskStatusChanged event = events.poll(timeout, unit);
        if (event == null) {
            throw new TimeoutException();
        }
        return event;
    }

}