You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@tomcat.apache.org by co...@locus.apache.org on 2000/11/22 01:21:25 UTC
cvs commit: jakarta-tomcat/src/share/org/apache/tomcat/util ObjectSerializer.java
costin 00/11/21 16:21:25
Modified: src/share/org/apache/tomcat/modules/session
SimpleSessionStore.java
src/share/org/apache/tomcat/session
StandardSessionInterceptor.java
Added: src/share/org/apache/tomcat/util ObjectSerializer.java
Removed: src/share/org/apache/tomcat/session SessionSerializer.java
Log:
Moved tomcat.session.SessionSerializer to tomcat.util.ObjectSerializer.
The class was cleaned of all tomcat session-specific code, can be used to
change the class loader of any serializable object.
It will be reuse in tomcat to fix reloading of Context attributes ( that are not
preserved right now), you can use it in any other application ( since it
has no dependencies on tomcat )
Revision Changes Path
1.3 +1 -1 jakarta-tomcat/src/share/org/apache/tomcat/modules/session/SimpleSessionStore.java
Index: SimpleSessionStore.java
===================================================================
RCS file: /home/cvs/jakarta-tomcat/src/share/org/apache/tomcat/modules/session/SimpleSessionStore.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- SimpleSessionStore.java 2000/11/22 00:09:59 1.2
+++ SimpleSessionStore.java 2000/11/22 00:21:24 1.3
@@ -204,7 +204,7 @@
// avoid accessing object's internals
// XXX PipeStream !?!
Hashtable orig= sM.getSessions();
- Object newS = SessionSerializer.doSerialization( newLoader, orig);
+ Object newS = ObjectSerializer.doSerialization( newLoader, orig);
sM.setSessions( (Hashtable)newS );
// Update the request session id
1.16 +1 -1 jakarta-tomcat/src/share/org/apache/tomcat/session/StandardSessionInterceptor.java
Index: StandardSessionInterceptor.java
===================================================================
RCS file: /home/cvs/jakarta-tomcat/src/share/org/apache/tomcat/session/StandardSessionInterceptor.java,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -r1.15 -r1.16
--- StandardSessionInterceptor.java 2000/11/21 00:31:14 1.15
+++ StandardSessionInterceptor.java 2000/11/22 00:21:25 1.16
@@ -190,7 +190,7 @@
// avoid accessing object's internals
// XXX PipeStream !?!
Hashtable orig= sM.getSessions();
- Object newS = SessionSerializer.doSerialization( newLoader, orig);
+ Object newS = ObjectSerializer.doSerialization( newLoader, orig);
sM.setSessions( (Hashtable)newS );
// Update the request session id
1.1 jakarta-tomcat/src/share/org/apache/tomcat/util/ObjectSerializer.java
Index: ObjectSerializer.java
===================================================================
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.tomcat.util;
import java.io.*;
import java.util.*;
// from tomcat.session.SessionSerializer
/**
* Helper for object reloading. Will change the classloader of a
* serializable object.
*
* Old comment: ( code works now for any object, not only HttpSession )
*
* This class manages the serialization of HttpSession object across
* classloader reloads. It does this by first getting a copy of the
* HttpSessions hashtable from the SessionManager and then using a
* special internal class ObjectInputStream that uses the newly created
* classloader to de-serialize the sessions. This class is called from
* within the Handler.handleReload() method. Much of this code
* is essentially the same as what I put into the Apache JServ release
* so it is pretty well tested. It also depends on having HttpSession
* implement the read/writeObject methods properly to only accept
* objects that are serializable.
*
* @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
* @author cmanolache@yahoo.com
*/
public final class ObjectSerializer
{
/**
This is the method that does the serialization.
*/
public static final Object doSerialization(ClassLoader cl,
Object sessions)
{
// get the hashtable of sessions
try {
// writes the session data out, but loses the contexts
// because they cannot be serialized
ByteArrayOutputStream b = new ByteArrayOutputStream();
ObjectOutputStream o = new ObjectOutputStream(b);
// write out the hashtable to the OOS
o.writeObject(sessions);
o.flush();
// create the streams to read the sessions back in from.
byte data[]=b.toByteArray();
ByteArrayInputStream bIn = new ByteArrayInputStream (data);
ObjectInputStream oOut= new ACLObjectInputStream(cl, bIn);
// unserialize the sessions
sessions = oOut.readObject();
return sessions;
} catch (Exception e) {
// log the error. there shouldn't be one here though.
// XXX We should call Logger.log - this is a problem, but
// it's better to have a bug ( writing to out instead of log)
// than adding dependencies to context.
System.out.println( "SessionSerializer: " + e );
}
return sessions;
}
/**
* When deserializing the sessions during a class
* loader reload, override the resolveClass() method
* so that it uses the AdaptiveClassLoader to deserialize
* the sessions. This has the benefit of allowing
* objects that are only within the ACL's classpath
* to be found and deserialized.
*/
private static final class ACLObjectInputStream extends ObjectInputStream {
ClassLoader loader;
ACLObjectInputStream(ClassLoader loader, InputStream bIn)
throws IOException
{
super(bIn);
this.loader=loader;
}
protected Class resolveClass(ObjectStreamClass v)
throws IOException, ClassNotFoundException
{
// use our new loader instead of the system loader
return loader.loadClass(v.getName());
}
}
}