/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2010, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.modcluster.config.impl;

import org.jboss.modcluster.config.SessionDrainingStrategy;
import org.jboss.modcluster.container.Context;

/**
 * @author Paul Ferraro
 */
public enum SessionDrainingStrategyEnum implements SessionDrainingStrategy {
    /** Drain sessions only if the target context is non-distributable, i.e. its sessions are not replicated */
    DEFAULT(null),
    /** Always drain sessions */
    ALWAYS(Boolean.TRUE),
    /** Never drain sessions */
    NEVER(Boolean.FALSE);

    private final Boolean drainSessions;

    SessionDrainingStrategyEnum(Boolean drainSessions) {
        this.drainSessions = drainSessions;
    }

    /**
     * @see SessionDrainingStrategy#isEnabled(org.jboss.modcluster.container.Context)
     */
    @Override
    public boolean isEnabled(Context context) {
        return (this.drainSessions != null) ? this.drainSessions : !context.isDistributable();
    }
}
