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Posted to jdo-user@db.apache.org by "ozvena@gmail.com" <oz...@gmail.com> on 2009/05/19 23:34:51 UTC
PersistenceManagerFactory configuration for flat-file database
Hello,
I can't find any information about how to configure
PersistenceManagerFactory for flat-file database.
Your help is appreciated!
Re: PersistenceManagerFactory configuration for flat-file database
Posted by David Ezzio <da...@ezzio.us>.
Hi Ozvena,
I think you'll find that HSQL also store it data in human readable
format for some table types. If that satisfies your needs, then
DataNucleus will definitely do the job for you as I believe it supports
HSQL.
Cheers,
David
ozvena@gmail.com wrote:
> Hi Matthew,
>
> I am not using any flat-file DB. It is a new application I am developing.
> The size of the database can range from few entries to few dozen of entries.
> Each entry represents 3 strings. I want flat-file DB as it is user readable
> and can be changed/edited by hand if needed.
>
> I will look at DataNucleus to see if it supports plain simple flat-file DB.
>
> Thank you!
> Ozvena
>
>
>
> On Tue, May 19, 2009 at 5:04 PM, Matthew Adams <ma...@matthewadams.me>wrote:
>
>> Hi ozvena,
>>
>> In order for you to use a flat-file database, you need to find a JDO
>> vendor that supports one. First off, what kind of flat-file database
>> are you using? I imagine a likely JDO candidate is DataNucleus, the
>> JDO reference implementation. If it doesn't support whatever you're
>> using for a flat-file database, you can write a plug-in to support it.
>> I haven't dug deeply, but you might consider DataNucleus over db4o.
>>
>> HTH,
>> Matthew
>>
>> On Tue, May 19, 2009 at 2:34 PM, ozvena@gmail.com <oz...@gmail.com>
>> wrote:
>>> Hello,
>>>
>>> I can't find any information about how to configure
>>> PersistenceManagerFactory for flat-file database.
>>>
>>> Your help is appreciated!
>>>
>>
>>
>> --
>> mailto:matthew@matthewadams.me
>> skype:matthewadams12
>> yahoo:matthewadams
>> aol:matthewadams12
>> google-talk:matthewadams12@gmail.com<go...@gmail.com>
>> msn:matthew@matthewadams.me
>> http://matthewadams.me
>> http://www.linkedin.com/in/matthewadams
>>
>
Re: PersistenceManagerFactory configuration for flat-file database
Posted by Andy Jefferson <an...@datanucleus.org>.
> I will look at DataNucleus to see if it supports plain simple flat-file DB.
I dunno what is "simple flat file DB", and don't really like the idea of
inventing our own DB (there must be enough DB's around already :-) ), so if
we reuse existing ones there are, at least,
* HSQLDB option that David already mentioned,
* ODF (the ISO document format used by OpenOffice/KOffice) which is basically
XML so is user-editable.
* XML itself
* JSON - also user-editable
These options are all supported by DataNucleus
--
Andy (DataNucleus - http://www.datanucleus.org)
Re: PersistenceManagerFactory configuration for flat-file database
Posted by "ozvena@gmail.com" <oz...@gmail.com>.
Hi Matthew,
I am not using any flat-file DB. It is a new application I am developing.
The size of the database can range from few entries to few dozen of entries.
Each entry represents 3 strings. I want flat-file DB as it is user readable
and can be changed/edited by hand if needed.
I will look at DataNucleus to see if it supports plain simple flat-file DB.
Thank you!
Ozvena
On Tue, May 19, 2009 at 5:04 PM, Matthew Adams <ma...@matthewadams.me>wrote:
> Hi ozvena,
>
> In order for you to use a flat-file database, you need to find a JDO
> vendor that supports one. First off, what kind of flat-file database
> are you using? I imagine a likely JDO candidate is DataNucleus, the
> JDO reference implementation. If it doesn't support whatever you're
> using for a flat-file database, you can write a plug-in to support it.
> I haven't dug deeply, but you might consider DataNucleus over db4o.
>
> HTH,
> Matthew
>
> On Tue, May 19, 2009 at 2:34 PM, ozvena@gmail.com <oz...@gmail.com>
> wrote:
> > Hello,
> >
> > I can't find any information about how to configure
> > PersistenceManagerFactory for flat-file database.
> >
> > Your help is appreciated!
> >
>
>
>
> --
> mailto:matthew@matthewadams.me
> skype:matthewadams12
> yahoo:matthewadams
> aol:matthewadams12
> google-talk:matthewadams12@gmail.com<go...@gmail.com>
> msn:matthew@matthewadams.me
> http://matthewadams.me
> http://www.linkedin.com/in/matthewadams
>
Re: PersistenceManagerFactory configuration for flat-file database
Posted by Matthew Adams <ma...@matthewadams.me>.
Hi ozvena,
In order for you to use a flat-file database, you need to find a JDO
vendor that supports one. First off, what kind of flat-file database
are you using? I imagine a likely JDO candidate is DataNucleus, the
JDO reference implementation. If it doesn't support whatever you're
using for a flat-file database, you can write a plug-in to support it.
I haven't dug deeply, but you might consider DataNucleus over db4o.
HTH,
Matthew
On Tue, May 19, 2009 at 2:34 PM, ozvena@gmail.com <oz...@gmail.com> wrote:
> Hello,
>
> I can't find any information about how to configure
> PersistenceManagerFactory for flat-file database.
>
> Your help is appreciated!
>
--
mailto:matthew@matthewadams.me
skype:matthewadams12
yahoo:matthewadams
aol:matthewadams12
google-talk:matthewadams12@gmail.com
msn:matthew@matthewadams.me
http://matthewadams.me
http://www.linkedin.com/in/matthewadams