| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package org.apache.catalina.cluster.session; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectStreamClass; |
| |
| /** |
| * Custom subclass of <code>ObjectInputStream</code> that loads from the |
| * class loader for this web application. This allows classes defined only |
| * with the web application to be found correctly. |
| * |
| * @@author Craig R. McClanahan |
| * @@author Bip Thelin |
| * @@version $Revision$, $Date$ |
| */ |
| |
| public final class ReplicationStream |
| extends ObjectInputStream { |
| |
| |
| /** |
| * The class loader we will use to resolve classes. |
| */ |
| private ClassLoader classLoader = null; |
| |
| /** |
| * Construct a new instance of CustomObjectInputStream |
| * |
| * @@param stream The input stream we will read from |
| * @@param classLoader The class loader used to instantiate objects |
| * |
| * @@exception IOException if an input/output error occurs |
| */ |
| public ReplicationStream(InputStream stream, |
| ClassLoader classLoader) |
| throws IOException { |
| |
| super(stream); |
| this.classLoader = classLoader; |
| } |
| |
| /** |
| * Load the local class equivalent of the specified stream class |
| * description, by using the class loader assigned to this Context. |
| * |
| * @@param classDesc Class description from the input stream |
| * |
| * @@exception ClassNotFoundException if this class cannot be found |
| * @@exception IOException if an input/output error occurs |
| */ |
| public Class resolveClass(ObjectStreamClass classDesc) |
| throws ClassNotFoundException, IOException { |
| String name = classDesc.getName(); |
| boolean tryRepFirst = name.startsWith("org.apache.catalina.cluster"); |
| try |
| { |
| if ( tryRepFirst ) return findReplicationClass(name); |
| else return findWebappClass(name); |
| } |
| catch ( Exception x ) |
| { |
| if ( tryRepFirst ) return findWebappClass(name); |
| else return findReplicationClass(name); |
| } |
| } |
| |
| public Class findReplicationClass(String name) |
| throws ClassNotFoundException, IOException { |
| return Class.forName(name, false, getClass().getClassLoader()); |
| } |
| |
| public Class findWebappClass(String name) |
| throws ClassNotFoundException, IOException { |
| return Class.forName(name, false, classLoader); |
| } |
| |
| |
| } |