01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.webbeans.component;
30:
31: import java.lang.ref.*;
32:
33: import com.caucho.config.*;
34: import com.caucho.loader.*;
35:
36: /**
37: * Waits for the close event and calls a destroy() method.
38: */
39: public class ComponentClose implements ClassLoaderListener {
40: private final WeakReference<Object> _ref;
41: private final ComponentImpl _comp;
42:
43: public ComponentClose(Object value, ComponentImpl comp) {
44: _comp = comp;
45: _ref = new WeakReference<Object>(value);
46: }
47:
48: /**
49: * Handles the case where a class loader is activated.
50: */
51: public void classLoaderInit(DynamicClassLoader loader) {
52: }
53:
54: /**
55: * Handles the case where a class loader is dropped.
56: */
57: public void classLoaderDestroy(DynamicClassLoader loader) {
58: Object obj = _ref.get();
59:
60: if (obj != null)
61: _comp.destroy(obj, new ConfigContext());
62: }
63:
64: public String toString() {
65: return getClass().getSimpleName() + "[" + _comp + "]";
66: }
67: }
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