Source Code Cross Referenced for UnifiedClassLoader3.java in  » EJB-Server-JBoss-4.2.1 » jmx » org » jboss » mx » loading » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » jmx » org.jboss.mx.loading 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package org.jboss.mx.loading;
023:
024:        import java.net.URL;
025:
026:        /** An extension of UnifiedClassLoader that manages a thread based loading
027:         * strategy to work around the locking problems associated with the VM
028:         * initiated locking due to the synchronized loadClassInternal method of
029:         * ClassLoader which cannot be overriden.
030:
031:         * @author <a href="scott.stark@jboss.org">Scott Stark</a>
032:         * @version $Revision: 57200 $
033:         */
034:        public class UnifiedClassLoader3 extends UnifiedClassLoader implements 
035:                UnifiedClassLoader3MBean {
036:            // Static --------------------------------------------------------
037:
038:            // Attributes ----------------------------------------------------
039:
040:            // Constructors --------------------------------------------------
041:            /**
042:             * Construct a <tt>UnifiedClassLoader</tt> without registering it to the
043:             * classloader repository.
044:             *
045:             * @param url   the single URL to load classes from.
046:             */
047:            public UnifiedClassLoader3(URL url) {
048:                this (url, null);
049:            }
050:
051:            /**
052:             * Construct a <tt>UnifiedClassLoader</tt> without registering it to the
053:             * classloader repository.
054:             *
055:             * @param url   the single URL to load classes from.
056:             * @param origURL the possibly null original URL from which url may
057:             * be a local copy or nested jar.
058:             */
059:            public UnifiedClassLoader3(URL url, URL origURL) {
060:                super (url, origURL);
061:            }
062:
063:            /** Construct a UnifiedClassLoader and associate it with the given
064:             * repository.
065:             * @param url The single URL to load classes from.
066:             * @param origURL the possibly null original URL from which url may
067:             * be a local copy or nested jar.
068:             * @param repository the repository this classloader delegates to
069:             */
070:            public UnifiedClassLoader3(URL url, URL origURL,
071:                    LoaderRepository repository) {
072:                this (url, origURL);
073:
074:                // set the repository reference
075:                this .setRepository(repository);
076:            }
077:
078:            /** Construct a UnifiedClassLoader and associate it with the given
079:             * repository.
080:             * @param url The single URL to load classes from.
081:             * @param origURL the possibly null original URL from which url may
082:             * be a local copy or nested jar.
083:             * @param parent the parent class loader to use
084:             * @param repository the repository this classloader delegates to
085:             */
086:            public UnifiedClassLoader3(URL url, URL origURL,
087:                    ClassLoader parent, LoaderRepository repository) {
088:                super (url, origURL, parent);
089:
090:                // set the repository reference
091:                this .setRepository(repository);
092:            }
093:
094:            // Public --------------------------------------------------------
095:
096:            /**
097:             * Retruns a string representaion of this UCL.
098:             */
099:            public String toString() {
100:                StringBuffer tmp = new StringBuffer(super .toString());
101:                tmp.setCharAt(tmp.length() - 1, ',');
102:                tmp.append("addedOrder=");
103:                tmp.append(getAddedOrder());
104:                tmp.append('}');
105:                return tmp.toString();
106:            }
107:        }
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