Tomcatでのダイナミックプロキシの使用について

2005/03/14 14:23:16 org.apache.catalina.session.StandardManager start
致命的: 永続記憶装置からセッションをロード中の例外です
java.lang.ClassNotFoundException: jp.overdose.buggle.beans.UserBean
	at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:854)
	at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:721)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:219)
	at java.io.ObjectInputStream.resolveProxyClass(ObjectInputStream.java:630)
	at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1469)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1432)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
	at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1342)
	at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:885)
	at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:416)
	at org.apache.catalina.session.StandardManager.load(StandardManager.java:343)
	at org.apache.catalina.session.StandardManager.start(StandardManager.java:657)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4294)
	at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3043)
	at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:4658)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1619)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1628)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1628)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1608)
	at java.lang.Thread.run(Thread.java:534)

/*
 * 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.util;

import java.io.InputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.lang.reflect.Proxy;

/**
 * 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: 1.3 $, $Date: 2004/02/27 14:58:50 $
 */

public final class CustomObjectInputStream 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 CustomObjectInputStream(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 {
		return Class.forName(classDesc.getName(), false, classLoader);
	}

	/**
	 * このメソッドを追加
	 */
	protected Class resolveProxyClass(String[] interfaces) throws IOException,
			ClassNotFoundException {
		try {
			return super.resolveProxyClass(interfaces);
		} catch (ClassNotFoundException e) {
			Class[] classObjs = new Class[interfaces.length];
			for (int i = 0; i < interfaces.length; i++) {
				Class cl = Class.forName(interfaces[i], false, classLoader);
				classObjs[i] = cl;
			}
			try {
				return Proxy.getProxyClass(classLoader, classObjs);
			} catch (IllegalArgumentException ex) {
				throw new ClassNotFoundException(null, ex);
			}
		}
	}
}