Measuring memory footprint
by Arturo Frappe
Hello everyone.
I'm trying to measure persisted object's memory footprint, I've been
readed Dr. Heinz M. Kabutz's article on:
http://www.javaspecialists.eu/archive/Issue142.html
Using Kabutz's agent I'm creating a session object, and I measure it,
then I persist an existing object and I measure it, finally I
substract the difference.
I'm not sure about this, could you give me some pointers?
15 years, 4 months
Returned mail: see transcript for details
by The Post Office
The original message was received at Fri, 16 Oct 2009 17:10:55 +0700 from lists.jboss.org [66.0.93.38]
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15 years, 4 months
Welcome Sharath Reddy as new committer
by Emmanuel Bernard
Please welcome Sharath as new committer to the project.
He has handed me too many quality patches to apply, making me the
bottleneck. So I am stepping out of the way.
Specifically, he has been adding new long awaiting features on
Hibernate Annotations.
Welcome and thank you for your contribution! Oh and keep going ;)
Emmanuel
15 years, 4 months
hibernate/jpa for non-relational databases
by Tomasz Chodakowski
Hi,
I would like to get your opinion on providing Hibernate-backed JPA
implementation for non-relational storage.
Given rising popularity and variety of key-value stores and the fact
that often they provide subset of functionality found in relational
databases, it might make sense (especially for web-scale companies that
most likely will be using number of storage technologies) to leverage
Hibernate model for key-value stores. Perhaps only a subset of features
and subset of the querying capabilities.
As relations between entities in key-value stores are done on client
side, the possible implementation could include some form of relational
engine (similar to what Carbonado[1] and Oracle's DPL[2] do for
BerkeleyDB) to provide (partial) support for query language. Providing
caching, entity lifecycle management, validation and even transactions
should be rather easy as those are orthogonal concerns.
WDYT? Do you see Hibernate/JPA catering for scenarios that leverage
key-value stores? Do you see any major impediments either in Hibernate
implementation or JPA philosophy that would make such extension not
worth the effort?
Cheers,
Tomasz
ps: sample project along similar lines of thinking:
http://code.google.com/p/simplejpa/
[1] http://carbonado.sourceforge.net/
[2] http://www.oracle.com/database/berkeley-db/je/index.html
15 years, 4 months
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by The Post Office
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15 years, 4 months
Copyright notice
by Emmanuel Bernard
Here are a few guidelines on copyright notice.
When you touch an existing file or create a new one, set 2009 to the
copyright notice (no need to keep the previous year around).
Aside from that the correct copyright notice is as followed:
- notice Red Hat, Inc. and Red Hat, Inc. and/or its affiliates
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009, Red Hat, Inc. and/or its affiliates or third-
party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions
are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to
use, modify,
* copy, or redistribute it subject to the terms and conditions of
the GNU
* Lesser General Public License, as published by the Free Software
Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public
License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
15 years, 4 months
