UnifiedClassLoader3


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8     * under the terms of the GNU Lesser General Public License as
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14    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15    * Lesser General Public License for more details.
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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.mx.loading;
23  
24  import java.net.URL  ;
25  
26  /** An extension of UnifiedClassLoader that manages a thread based loading
27   * strategy to work around the locking problems associated with the VM
28   * initiated locking due to the synchronized loadClassInternal method of
29   * ClassLoader which cannot be overriden.
30  
31   * @author <a HREF="scott.stark@jboss.org">Scott Stark</a>
32   * @version $Revision: 37459 $
33  */
34  public class UnifiedClassLoader3 extends UnifiedClassLoader
35     implements UnifiedClassLoader3MBean
36  {
37     // Static --------------------------------------------------------
38  
39     // Attributes ----------------------------------------------------
40  
41     // Constructors --------------------------------------------------
42     /**
43      * Construct a <tt>UnifiedClassLoader</tt> without registering it to the
44      * classloader repository.
45      *
46      * @param url   the single URL to load classes from.
47      */
48     public UnifiedClassLoader3(URL   url)
49     {
50        this(url, null);
51     }
52     /**
53      * Construct a <tt>UnifiedClassLoader</tt> without registering it to the
54      * classloader repository.
55      *
56      * @param url   the single URL to load classes from.
57      * @param origURL the possibly null original URL from which url may
58      * be a local copy or nested jar.
59      */
60     public UnifiedClassLoader3(URL   url, URL   origURL)
61     {
62        super(url, origURL);
63     }
64  
65     /** Construct a UnifiedClassLoader and associate it with the given
66      * repository.
67      * @param url The single URL to load classes from.
68      * @param origURL the possibly null original URL from which url may
69      * be a local copy or nested jar.
70      * @param repository the repository this classloader delegates to
71      */
72     public UnifiedClassLoader3(URL   url, URL   origURL, LoaderRepository repository)
73     {
74        this(url, origURL);
75  
76        // set the repository reference
77        this.setRepository(repository);
78     }
79     /** Construct a UnifiedClassLoader and associate it with the given
80      * repository.
81      * @param url The single URL to load classes from.
82      * @param origURL the possibly null original URL from which url may
83      * be a local copy or nested jar.
84      * @param parent the parent class loader to use
85      * @param repository the repository this classloader delegates to
86      */
87     public UnifiedClassLoader3(URL   url, URL   origURL, ClassLoader   parent,
88           LoaderRepository repository)
89     {
90        super(url, origURL, parent);
91  
92        // set the repository reference
93        this.setRepository(repository);
94     }
95  
96     // Public --------------------------------------------------------
97  
98     /**
99     * Retruns a string representaion of this UCL.
100    */
101    public String   toString()
102    {
103       StringBuffer   tmp = new StringBuffer  (super.toString());
104       tmp.setCharAt(tmp.length()-1, ',');
105       tmp.append("addedOrder=");
106       tmp.append(getAddedOrder());
107       tmp.append('}');
108       return tmp.toString();
109    }
110 }
111
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