org.ow2.bonita.runtime.event.GetEventCouples Maven / Gradle / Ivy

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/**
 * Copyright (C) 2012 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library 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 Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA  02110-1301, USA.
 **/
package org.ow2.bonita.runtime.event;

import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.ow2.bonita.env.Environment;
import org.ow2.bonita.services.EventService;
import org.ow2.bonita.util.Command;
import org.ow2.bonita.util.EnvTool;

/**
 * 
 * @author Matthieu Chaffotte
 * 
 */
public class GetEventCouples implements Command> {

  private static final long serialVersionUID = -3820361512043859834L;

  static final Logger LOG = Logger.getLogger(GetEventCouples.class.getName());

  @Override
  public Set execute(final Environment environment) throws Exception {
    final Set usedIncomings = new HashSet();
    final Set usedOutgoings = new HashSet();
    final EventService eventService = EnvTool.getEventService();
    final List couples = eventService.getCorrelationKeyMessageEventCouples();
    if (couples.isEmpty()) {
      return Collections.emptySet();
    }
    final Set result = new HashSet();
    for (final EventCouple couple : couples) {
      final IncomingEventInstance incoming = couple.getIncoming();
      final OutgoingEventInstance outgoing = couple.getOutgoing();
      final long incomingId = incoming.getId();
      final long outgoingId = outgoing.getId();
      if (!usedIncomings.contains(incomingId) && !usedOutgoings.contains(outgoingId)) {
        usedIncomings.add(incomingId);
        usedOutgoings.add(outgoingId);
        incoming.lock();
        outgoing.lock();
        result.add(new EventCoupleId(incomingId, outgoingId));
      }
    }
    if (LOG.isLoggable(Level.INFO)) {
      LOG.info("Correlation event matcher: New event couples to execute: " + result.toString());
    }
    return result;
  }

}