Tomcat, Connection Pooling, and MySQL

2003-10-03 Thread Steven Nakhla
Has anyone managed to setup Tomcat to use MySQL for database connection pooling?  I've 
found this document which gives information on it:
 
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html
 
However, when I try and run it I get messages about not being able to find the hsql 
driver class.  From searching on Google, it seems that this is a common error, but 
there are no solutions posted.
 
Has anyone managed to get it up and running successfully?  I'd really appreciate any 
advice!  Thanks!
 

Steve Nakhla
 
 


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Re: MySQL & mail servers

2003-04-01 Thread Steven Nakhla
Why?  Well, we have our reasons.  Particularly because
we want an efficient way to handle millions of
messages, plus the ability to search/manipulate/data
mine through them using specific applications.

SN


--- Jeremy Zawodny <[EMAIL PROTECTED]> wrote:
> On Tue, Apr 01, 2003 at 01:04:59PM -0800, Steven
> Nakhla wrote:
> >
> > Are there currently any open-source mail servers
> that utilize MySQL?
> 
> Yes, many.
> 
> > I know that there are some that will authenticate
> against accounts
> > stored in a MySQL database, but I am looking for a
> mail server that
> > actually stores the messages in the database.
> 
> Why, exactly?
> 
> Jeremy
> -- 
> Jeremy D. Zawodny |  Perl, Web, MySQL, Linux
> Magazine, Yahoo!
> <[EMAIL PROTECTED]>  |  http://jeremy.zawodny.com/
> 
> MySQL 4.0.8: up 57 days, processed 1,928,444,836
> queries (388/sec. avg)


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MySQL & mail servers

2003-04-01 Thread Steven Nakhla
Are there currently any open-source mail servers that
utilize MySQL?  I know that there are some that will
authenticate against accounts stored in a MySQL
database, but I am looking for a mail server that
actually stores the messages in the database.  

Ideally, I'd like to be able to setup an IMAP server
that stores everything via a MySQL backend.  Any
thoughts?  Recommendations?  Or is this not possible?

Steve Nakhla
[EMAIL PROTECTED]

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Application security advice

2003-02-20 Thread Steven Nakhla
I am writing an application that will store
information in a MySQL database.  I would like to
encrypt the data being stored in the database using
the AES_ENCRYPT/DECRYPT functions.  My question is,
how can I securely contain the password in memory
within the application?

For example, the application allows the user to login
using a username and password that will be stored in
the database.  I would like to use that password to
encrypt the information.  However, I would like the
user to be able to decrypt the information on the fly
as long as they are logged into the application.

I am worried, however, about storing the password in
memory.  How can I do this securely?  If my
application crashes, the password could be stored
within the core file.  

Can anyone provide advice on how to securely contain
the password in memory so that the information can be
decrypted and accessed transparently?


Steve Nakhla

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Re: Row value uniqueness?

2003-01-08 Thread Steven Nakhla
Aside from designating a row as a primary key, is
their any SQL syntax to force that entries within a
row are unique (such as a string value)?  Thanks!
 
Steve Nakhla


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Access control lists on rows?

2003-01-04 Thread Steven Nakhla
I know I can restrict a user's access to a table with
the GRANT command.  However, is there any way to
restrict a user's access to individual rows within a
table?  For example, if I were using a SQL table to
hold binary data (utilizing it like a filesystem, for
example) could I restrict a user from reading or
writing to or from certain rows within the table?  Has
anyone implemented something like this before and
could give me some insight?  Thanks much!


Steve Nakhla

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MySQL, OpenLDAP for Authentication

2002-12-09 Thread Steven Nakhla
I need to setup a Unix authentication scheme using
OpenLDAP with MySQL on the backend storing all of the
account data.  (Yes, I know that the folks behind
OpenLDAP don't recommend using SQL...We have our
reasons)  I've setup unixODBC so my LDAP server can at
least talk to my MySQL server.  Has anyone out there
done something similar?  Do you know how I can go
about storing the account information within the
database, etc.?  I'd really appreciate any insight you
can give.  Thanks!

Steve Nakhla

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MySQL and binary data

2002-11-04 Thread Steven Nakhla
I am using Qt 3.0.5's QSql database classes to store
information in a MySQL database.  MySQL is at version
3.23.49.  I am trying to store binary data into a
column marked as MEDIUMBLOB (or even LONGBLOB) but am
having difficulties.  Whenever I insert data that is
around 1 Megabyte in size, I get an error saying
"MySQL server has gone away".  It doesn't happen with
smaller data, and even if I change the column type to
LONGBLOB I still have this problem.  The data I am
trying to insert is an exectuable application,
although I have tried it with a normal text file and
have run into the same problems.  Can anyone shed some
light onto what could be causing this problem? 
Thanks!!

Steve Nakhla
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MySQL and OpenLDAP for Unix accounts

2002-10-29 Thread Steven Nakhla
I currently have an authentication server on my home
network setup to do LDAP authentication.  However, I
would like to modify the LDAP server to use MySQL to
store the information on the backend.  I know that
OpenLDAP supports SQL back-ends (I believe through
ODBC, but I could be wrong) but I can't find any
information on how to setup such a system.  Ideally, I
would eventually like to modify my Samba PDC to use
OpenLDAP (and, hence, MySQL as well).  Can anyone give
me any guidance on setting this up?  Can you point me
to any useful documentation?  I'd really appreciate
it!!

(Yes, I know that the folks at OpenLDAP recommend that
you not use SQL to store information for performance
reasons.  This is more for my own benefit, and is
strictly an educational exercise to get me more
familiar with MySQL)


Steve Nakhla
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Connection problems

2002-10-28 Thread Steven Nakhla
I recently installed Red Hat 7.3 on a box, and have
been having difficulty connecting to my MySQL server. 
I can connect locally.  That is, on the same machine
as the server.  However, if I try and connect from a
remote machine with the following command:

mysql -h  -p 

I get the following error message:

ERROR 2013: Lost connection to MySQL server during
query


I've poked around on the net and in the documentation,
but I can't find anything that explains this.  Aside
from creating a database and using the GRANT ALL
command on it to setup privileges, I haven't mucked
with the configuration at all.  I've tried
reinstalling the RPMs for MySQL and still no luck. 
Any idea what could be causing this?  How can I fix
it?  Thanks!!!


Steve Nakhla
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