resourcepool.java

c3p0数据库连接池实现源码

/*
 * Distributed as part of c3p0 v.0.9.1-pre6
 *
 * Copyright (C) 2005 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <[e-mail]>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 2.1, as 
 * published by the Free Software Foundation.
 *
 * 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; see the file LICENSE.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */


package com.mchange.v2.resourcepool;

import com.mchange.v1.util.ClosableResource;

public interface ResourcePool extends ClosableResource
{
    // status in pool return values
    final static int KNOWN_AND_AVAILABLE   = 0;
    final static int KNOWN_AND_CHECKED_OUT = 1;
    final static int UNKNOWN_OR_PURGED     = -1;

    public Object checkoutResource()
	throws ResourcePoolException, InterruptedException;

    public Object checkoutResource( long timeout )
	throws TimeoutException, ResourcePoolException, InterruptedException;

    public void checkinResource( Object resc ) 
	throws ResourcePoolException;

    public void checkinAll()
	throws ResourcePoolException;

    public int statusInPool( Object resc )
	throws ResourcePoolException;

    /**
     * Marks a resource as broken. If the resource is checked in,
     * it will be destroyed immediately. Otherwise, it will be
     * destroyed on checkin.
     */
    public void markBroken( Object resc ) 
	throws ResourcePoolException;

    public int getMinPoolSize()
	throws ResourcePoolException;

    public int getMaxPoolSize()
	throws ResourcePoolException;

    public int getPoolSize()
	throws ResourcePoolException;

    public void setPoolSize(int size)
	throws ResourcePoolException;

    public int getAvailableCount()
	throws ResourcePoolException;

    public int getExcludedCount()
	throws ResourcePoolException;

    public int getAwaitingCheckinCount()
	throws ResourcePoolException;

    /**
     * Discards all resources managed by the pool
     * and reacquires new resources to populate the
     * pool. Current checked out resources will still
     * be valid, and should still be checked into the
     * pool (so the pool can destroy them).
     */
    public void resetPool()
	throws ResourcePoolException;

    public void close() 
	throws ResourcePoolException;

    public void close( boolean close_checked_out_resources ) 
	throws ResourcePoolException;

    public interface Manager
    {
	public Object acquireResource() throws Exception;
	public void   refurbishIdleResource(Object resc) throws Exception;
	public void   refurbishResourceOnCheckout(Object resc) throws Exception;
	public void   refurbishResourceOnCheckin(Object resc) throws Exception;
	public void   destroyResource(Object resc) throws Exception;
    }
}