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Java > Open Source Codes > org > jboss > aop > instrument > HotSwapper


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.aop.instrument;
23
24 /**
25  * HotSwapper represents a class capable of hot swapping code.
26  * Every hot swap technique to be applied at JBoss AOP must implement this interface.
27  * @author Flavia Rainone
28  */
29 public interface HotSwapper
30 {
31    /**
32     * This method register class byte codes changes.
33     * Every time the implementation of a class has to be hot swapped,
34     * this method must called.
35     * When the client is done registering all the bytecode changes,
36     * it must call <code>hotSwap</code> in order to perform the hot swap
37     * of the registered changes.
38     * @param clazz the class whose byte codes will be hot swapped.
39     * @param classCode the new byte codes of <code>clazz</code>.
40     * @see hotSwap
41     */
42    void registerChange(Class JavaDoc clazz, byte[] classCode);
43    
44    /**
45     * Performs the hot swap of classes previously registered through
46     * <code>registerChange</code> method.
47     * @see register
48     */
49    void hotSwap();
50 }
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