/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2007, 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.as.ejb3.pool;

/**
 * A pool of stateless objects.
 * <p/>
 * A pool is linked to an object factory. How this link is established
 * is left beyond scope.
 *
 * @author <a href="mailto:carlo.dewolf@jboss.com">Carlo de Wolf</a>
 * @version $Revision: $
 */
public interface Pool<T> {
    /**
     * Discard an object. This will be called
     * in case of a system exception.
     *
     * @param obj the object
     */
    void discard(T obj);

    /**
     * Get an object from the pool. This will mark
     * the object as being in use.
     *
     * @return the object
     */
    T get();

    int getAvailableCount();

    int getCreateCount();

    int getCurrentSize();

    int getMaxSize();

    int getRemoveCount();

    /**
     * Release the object from use.
     *
     * @param obj the object
     */
    void release(T obj);

    void setMaxSize(int maxSize);

    /**
     * Start the pool.
     */
    void start();

    /**
     * Stop the pool.
     */
    void stop();
}