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Re: Questions!



Hi,

Thanks for your reply.

To answer your question- I am working with Win 2000.

I had a few other questions:

1) Could you elaborate more on the connection pooling concept - I read your reply to Prashanth in which you said that ozone assigns a connection to a thread for each single request, but I am not clear how 10 actual connections are needed to serve 100 servlet threads?

2)What is the difference between the DxLib package and the java.util? Can we use either?

3)I am trying to design a prototype for a library information system. I was wondering what is the best way to creat a huge no. of objects? Can we use an array (like that used to add parts in AutoImpl in sample oo1) or a vector and store the objects in that? Will this create a space issue?

- On a related note, when I need to do a query, for instance, I need to locate a book I guess I can use the vector data structure. I know ozone doesn't use a  query language- but is there any other way to query objects? Should I use a XML file and use XPATH instead?

Any help would be appreciated!

Thanks
Jonaki

>>> Falko Braeutigam <falko@smb-tec.com> 03/06/01 02:33PM >>>
Jonaki, the address of the mail list is ozone-users@ozone-db.org ...

On Mon, 05 Mar 2001, Jonaki Ray wrote:
> Hi,
> I am sorry about that. Here is the mail again.
> 
> Thanks
> 
> Jonaki
> 
> Hi,
> 
> I just started reading about ozone and it seems really interesting. I have some basic newbie questions:
> 
> .I would like to subscribe to this list but the link on the web page ddoesn't seem to be working. Will this email be sufficient or do I need to send an email somewhere else as well?
Lars maintains the mail lists. Are there any problems, Lars?

> 
> . The opp command is working but seems to hang. For ex. if I give
> oopp CattellImpl I get
> CattellImpl:
> creating .\CattellImpl_Proxy.java ...
> update methods:
> trying to process Cattell.java... (Cattell.java)
> trying to process CattellImpl.ocd
> delete ("int")
> insert ("int")
> addParts ("int")
> connectParts ("int")
> compiling .\CattellImpl_Proxy.java
> compiler: javac
> 
> and then it seems to hang. If I wait long enough and terminate the process it seems to have compiled and created the proxy file. (I am working on Windows OS).
Since I don't work on win I don't have an idea whats going on. Did others
encounter this problem? 
What version do you use?

> 
> . I was working with the samples-oo1 and I noticed that
> aa) if I give the noGui option, it doesn't seem to take the commandline args.  I finally figured out that if I give the commandline arguments as -benchmark1 -size3 (and so on) and alter the 
> filterAndApplyArgs( String[] args) method in oo1BenchmarkApp.java ( in org/ozoneDB/tools) it works.
> the alteration is:
> benchmarkId = new Integer( args[i].substring[10] ) ).intValue(); and so on for the other args aswell.
Hmmm... nobody has been complaining about the win start scripts for a long time
now. Again, do other win users have problems?

> 
> b) if I don't give the -noGui option the applet starts but was giving a java.net error:"localhost:3333 not known".
> I found that in the method actionPerformed( ActionEvent e ) (same file as above) the line
> 
> String[] args = {-benchmark=" + test,..,"-host=" + server + ":" + port);  should not have the +port option since it reads the serverHost as localhost:3333 and not as localhost alone.
> 
> I wonder if anyone else had the same experience.
> 
> . Finally, I was wondering if there are other people who have just started
> wworking with ozone so that I could exchange these basic issues and questions
> with them? Most of the questions seem to be from people who have been working
> with ozone for a longer period:)
No problem. Send your questions to this list.


Falko
-- 
______________________________________________________________________
Falko Braeutigam                              mailto:falko@smb-tec.com 
SMB GmbH                                        http://www.smb-tec.com