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From Richard Schilling <rschill...@cognitiongroup.biz>
Subject Re: greetings and question about data stores
Date Sat, 04 Aug 2007 17:46:31 GMT
Looking some more this morning, I also found the source code repository 
for netbeans b-tree implementation:


And lo and behold, I also found an old CORBA module I didn't know 
existed.  This is going to get interesting.... :-)


Craig L Russell wrote:
> Hi Richard,
> Sorry about that. The FOStore implementation had just a bit of 
> documentation which I've tried to locate for you but can't seem to find 
> just now. When I find it I'll post it on the JDO site and put a link here.
> Craig
> On Aug 3, 2007, at 11:07 PM, Richard Schilling wrote:
>> Here is the posting I had way back in March of 2006, which didn't get 
>> much response - if any at all:
>> http://www.webservertalk.com/archive383-2006-3-1437593.html
>> Never did find out the answers to these questions, but this explains 
>> what I'm up to.
>> After just looking, I find this on the netbeans site:
>> http://mdr.netbeans.org/architecture.html#persistence
>> This explains MDR, the use of b-tree (which the JDO reference 
>> implementation uses) in much more detail than I saw in the past.
>> FYI.
>> Cheers!
>> Richard Schilling
>> Craig L Russell wrote:
>>> Hi Richard,
>>> The fostore project at Apache JDO is an implementation that you could 
>>> study for insights as to how the various components interact. There's 
>>> a separation of an abstract StoreManager responsible for storing data 
>>> to a specific datastore, a StateManager responsible for managing the 
>>> state of individual instances, and a PersistenceManager whose API is 
>>> pretty much defined in the JDO specification.
>>> Regards,
>>> Craig
>>> On Jul 31, 2007, at 3:23 PM, Richard Schilling wrote:
>>>> I did realize that the JDO API and the model in the apache code was 
>>>> just the implementation of the spec.  What I'm after is to make sure 
>>>> I understand what parts of the API (which interfaces) are used by a 
>>>> specific implementation to cause classes to be committed to the data 
>>>> store.  It looks like the transactions defined in the spec serve 
>>>> this purpose, but there's so much information I can't be sure.
>>>> Thanks ... still getting my head around the JDO spec - I've even 
>>>> read the JDO book which I have.
>>>> Cheers.
>>>> Richard
>>>> Matthew T. Adams wrote:
>>>>> Hi Richard,
>>>>> Apache JDO is the home of the JDO API (the interface & class files

>>>>> of the
>>>>> specification) & TCK (the code that tests whether a JDO 
>>>>> implementation is
>>>>> compliant with the specification); none of the code here actually 
>>>>> writes to
>>>>> a database*.  The reference implementation for JDO 2.0 is JPOX
>>>>> (www.jpox.org) -- it is an implementation of the JDO 2.0 API.  
>>>>> There are
>>>>> also many other implementations of JDO out there.
>>>>> HTH,
>>>>> Matthew
>>>>> *:  There is a legacy reference implementation called FOStore 
>>>>> (pronounced
>>>>> like "foster") that was used as the JDO 1.0, but I don't think 
>>>>> that's used
>>>>> much anymore.  Others can comment on that.
>>>>> -----Original Message-----
>>>>> From: Richard Schilling [mailto:rschilling@cognitiongroup.biz] 
>>>>> Sent: Tuesday, July 31, 2007 10:22 AM
>>>>> To: jdo-dev@db.apache.org
>>>>> Subject: greetings and question about data stores
>>>>> Greetings.  This is my first post to the list.
>>>>> I would like to know about the code base itself.  There is not any 
>>>>> documentation that discusses the structure of the code itself and 
>>>>> how the software interacts with the data store.
>>>>> Can any one tell me what source code files actually contain the 
>>>>> code that writes to the data store?
>>>>> Thanks!
>>>>> Richard Schilling
>>> Craig Russell
>>> Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
>>> 408 276-5638 mailto:Craig.Russell@sun.com
>>> P.S. A good JDO? O, Gasp!
> Craig Russell
> Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
> 408 276-5638 mailto:Craig.Russell@sun.com
> P.S. A good JDO? O, Gasp!

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