| /* |
| * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//pool/src/java/org/apache/commons/pool/KeyedPoolableObjectFactory.java,v 1.1 2001/04/14 16:40:47 rwaldhoff Exp $ |
| * $Revision: 1.1 $ |
| * $Date: 2001/04/14 16:40:47 $ |
| * |
| * ==================================================================== |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 1999-2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Commons", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.commons.pool; |
| |
| /** |
| * A simple interface defining life-cycle methods for |
| * <tt>Object</tt>s to be used in a |
| * {@link KeyedObjectPool <tt>KeyedObjectPool</tt>}. |
| * <p> |
| * By contract, when an {@link KeyedObjectPool <tt>KeyedObjectPool</tt>} |
| * delegates to a <tt>KeyedPoolableObjectFactory</tt>, |
| * <ol> |
| * <li> |
| * {@link #makeObject(java.lang.Object) <tt>makeObject</tt>} is called whenever a new <tt>Object</tt> |
| * is needed. |
| * </li> |
| * <li> |
| * {@link #activateObject(java.lang.Object,java.lang.Object) <tt>activateObject</tt>} is invoked |
| * on every <tt>Object</tt> before it is returned from the |
| * {@link KeyedObjectPool <tt>KeyedObjectPool</tt>}. |
| * </li> |
| * <li> |
| * {@link #passivateObject(java.lang.Object,java.lang.Object) <tt>passivateObject</tt>} is invoked |
| * on every <tt>Object</tt> when it is returned to the |
| * {@link KeyedObjectPool <tt>KeyedObjectPool</tt>}. |
| * </li> |
| * <li> |
| * {@link #destroyObject(java.lang.Object,java.lang.Object) <tt>destroyObject</tt>} is invoked |
| * on every <tt>Object</tt> when it is being "dropped" from the |
| * {@link KeyedObjectPool <tt>KeyedObjectPool</tt>} (whether due to the response from |
| * {@link #validateObject(java.lang.Object,java.lang.Object) <tt>validateObject</tt>}, or |
| * for reasons specific to the {@link KeyedObjectPool <tt>KeyedObjectPool</tt>} implementation.) |
| * </li> |
| * <li> |
| * {@link #validateObject(java.lang.Object,java.lang.Object) <tt>validateObject</tt>} is invoked |
| * in an implementation-specific fashion to determine if an <tt>Object</tt> |
| * is still valid to be returned by the{@link KeyedObjectPool <tt>KeyedObjectPool</tt>}. |
| * It will only be invoked on an {@link #activateObject(java.lang.Object,java.lang.Object) "activated"} |
| * <tt>Object</tt>. |
| * </li> |
| * </ol> |
| * |
| * @author Rodney Waldhoff |
| * @version $Id: KeyedPoolableObjectFactory.java,v 1.1 2001/04/14 16:40:47 rwaldhoff Exp $ |
| * |
| * @see KeyedObjectPool |
| */ |
| public interface KeyedPoolableObjectFactory { |
| /** |
| * Create an Object that can be returned by the pool. |
| * @param key the key used when constructing the object |
| * @return an Object that can be returned by the pool. |
| */ |
| public abstract Object makeObject(Object key); |
| |
| /** |
| * Destroy an Object no longer needed by the pool. |
| * @param key the key used when selecting the object |
| * @param obj the Object to be destroyed |
| */ |
| public abstract void destroyObject(Object key, Object obj); |
| |
| /** |
| * Ensures that the Object is safe to be returned by the pool. |
| * Returns <tt>false</tt> if this object should be destroyed. |
| * @param key the key used when selecting the object |
| * @param obj the <tt>Object</tt> to be validated |
| * @return <tt>false</tt> if this <i>obj</i> is not valid and should |
| * be dropped from the pool, <tt>true</tt> otherwise. |
| */ |
| public abstract boolean validateObject(Object key, Object obj); |
| |
| /** |
| * Reinitialize an Object to be returned by the pool. |
| * @param key the key used when selecting the object |
| * @param obj the <tt>Object</tt> to be activated |
| */ |
| public abstract void activateObject(Object key, Object obj); |
| |
| /** |
| * Uninitialize an Object to be returned to the pool. |
| * @param key the key used when selecting the object |
| * @param obj the <tt>Object</tt> to be passivated |
| */ |
| public abstract void passivateObject(Object key, Object obj); |
| } |