Question about n:1 relation

Hi,
I have a question. If I have two persistence classes (say A and B)with n:1
relation. The B class has a collection that should contain all the
instances of A class that reference the B class instance. The question is:
If I create the instance of B class and then create n classes of the A
class, do I have to explicitly set the created collection of those n
classes to the instance of B or the creation of those n classes
referencing B and making them persistent is enough, i.e. that relation is
bidirectional automatically ?
(Forgive me if I missed something in this issue.)
Regards,
Anton

Hello Anton,
The way your instances refers to one another is purely a Java issue, while
the way it is made persistent is a JDO issue.
As a Java developper, you have to set-up the associations between you A
and B instances. This is implementation details. You may use existing
classes which helps you manage such an bi-directionnal association.
As soon as your java objects refers to one another, if class A and B are
persistent capable, you just have to make the B instance persistent, so
that, all A instances it refers to, will be persistent too. This is called
persistence by reachability.
Hope this clears any doubt.
Cheers,
Patrick Guillot
Versant France S.A.
Anton Kommar wrote:
Hi,
I have a question. If I have two persistence classes (say A and B)with n:1
relation. The B class has a collection that should contain all the
instances of A class that reference the B class instance. The question is:
If I create the instance of B class and then create n classes of the A
class, do I have to explicitly set the created collection of those n
classes to the instance of B or the creation of those n classes
referencing B and making them persistent is enough, i.e. that relation is
bidirectional automatically ?
(Forgive me if I missed something in this issue.)
Regards,
Anton

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Hello everybody,
SQL> SELECT * FROM v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL>
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VARIABLE mysid NUMBER
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http://docs.oracle.com/cd/E11882_01/server.112/e25513/dynviews_3016.htm#REFRN30223]
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9babjv8yq8ru3
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This was precisely what I did
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thanks in advance,
Regards,
Dariyoosh

>
and also v$session page, yet I didn't find anything indicating that SERVEROUTPUT should be switched off whenever views such as v$sql, v$session
are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
Hi Dariyoosh,
SET SERVEROUTPUT ON has the effect of executing dbms_output.get_lines after each and every statement. Not only related to system view.
Here below what Tom Kyte is explaining in this page:
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Al

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The POA-QF seems to be steadily working away and making progress at reducing the number of unindexed messages. However, I have questions about what I am seeing and what more I can do:
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If I want to use my secondary POA-QF to rebuild a user's index from scratch, does the main POA have to be offline and the user out of GWise? That is, Does the QF process require exclusive access in order to rebuild indexes from scratch?
Thanks for any thoughts or suggestions.
Peter Smick

pgsmick wrote:
> 1. Is the progress I am seeing real progress? For example I have a user with
> over 100,000 messages to be indexed and every time I check the logs, the count
> drops by about 500 messages per hourly QF cycle. I assume that if I just let
> it keep running, it will eventually get caught up and fixed. Not only with
> this user, but with all the others as well. Will my patience (and theirs) be
> rewarded? Are there any gotchas I need to prepare for?
Set this switch for this indexing POA - /qflevel=999 - this will index
everything in one run. It will take a long time, but with no qflevel switch you
are indeed only indexing 500 messages at a time, and if the user has that much
mail, it might never really catch up.
>
> 2. One user has recently had virtually all of her messages successfully moved
> to archive. I can see them in the Archive, and do not see them in the online
> account. However, now over a week later, QF still shows >130,000 items still
> left to index for that user. The POA-QF is making slow, steady progress
> reducing that number, but why is this user's QF count still so high? Does it
> just need more time, or is there something amiss for this user?
>
This is odd, because really the index count should drop to nothing, but with the
above switch this might get resolved as well.
> 3. I may want to rebuild indexes for single users from scratch. I have seen
> the TID 3105742 which tells how to do this: Essentially you turn off mail
> delivery functions, and make some other switch changes to dedicate the POA to
> indexing for just a single user, and then you let the POA rebuild the indexes.
> The implication of that scenario is that the POA is now enjoying exclusive
> access to the user's databases.
Not really - the POA is not enjoying exclusive access to the user's database,
the indexer is just avoiding an attempt to index anything else.
> If I want to use my secondary POA-QF to rebuild a user's index from scratch,
> does the main POA have to be offline and the user out of GWise? That is, Does
> the QF process require exclusive access in order to rebuild indexes from
> scratch?
No - QF never requires exclusive access. That said, you may find that an
extremely vigorous QF can cause slowdowns for the user.
Danita
Novell Knowledge Partner
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Re: Questions about Plan structure

Reply-To: "Duncan Kinnear" <[email protected]>
Q. if you have an Employee class with related EmployeeSubordinate and
EmployeeSalaryHistory classes, should these all be in the same plan?
A It is better to have them in the same plan.It depends on the design
you have
Q Why should the Managers be separated from their business classes?
A Managers are usually service objects which might require different
resources.
These managers when deployed might be required by several other
applications.
Seperating them as a different plan will help in just using one
installed partition to be
Used by different applications (refer about Reference Partition)
Q If you have the Database managers separate, what scope does each DB
manager cover?
A It is better to have the DB managers in user scope.
It depends on the numbers of users, u have for the system.
Since u are talking about 100 tables. It's a huge system.
It also depends on the user licenses u have for the backend.
Take care that u use proper load balancing of DB Managers for the
system.
Krishna CVSR
GoldStone Softech Inc
>
Hi there,
We are in the middle of designing the structure of a new system.
I have read/heard that it is best to break down the plans into the
following categories:
Business Classes
Managers/Services
Clients
I have a few questions about this structure:
Should related business classes be grouped together in Plans? E.g. if
you have an Employee class with related EmployeeSubordinate and
EmployeeSalaryHistory classes, should these all be in the same plan?
Why should the Managers be separated from their business classes?
E.g. if there is an EmployeeMgr service which deals with anything to do
with the Employee business class, why separate them in different
plans? If you need the manager to access the class, you will always
need both.
Some of the Forte documentation talks about "Policy" managers and
"Database" managers. How do the functions of these managers differ
for a simple CRUD (Create Read Update Delete) class?
If you have the Database managers separate, what scope does each
DB manager cover? I.e. do you have one for the entire database (over
100 tables in our case), or do you break it down by sub-system?
Thanks in advance for any answers.
Cheers,
Duncan Kinnear,
McCarthy and Associates, Email: [email protected]
PO Box 764, McLean Towers, Phone: +64 6 834 3360
Shakespeare Road, Napier, New Zealand. Fax: +64 6 834 3369
Providing Integrated Software to the Meat Processing Industry for over 10 years
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
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Get Your Private, Free Email at http://www.hotmail.com
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Reply-To: "Duncan Kinnear" <[email protected]>
Q. if you have an Employee class with related EmployeeSubordinate and
EmployeeSalaryHistory classes, should these all be in the same plan?
A It is better to have them in the same plan.It depends on the design
you have
Q Why should the Managers be separated from their business classes?
A Managers are usually service objects which might require different
resources.
These managers when deployed might be required by several other
applications.
Seperating them as a different plan will help in just using one
installed partition to be
Used by different applications (refer about Reference Partition)
Q If you have the Database managers separate, what scope does each DB
manager cover?
A It is better to have the DB managers in user scope.
It depends on the numbers of users, u have for the system.
Since u are talking about 100 tables. It's a huge system.
It also depends on the user licenses u have for the backend.
Take care that u use proper load balancing of DB Managers for the
system.
Krishna CVSR
GoldStone Softech Inc
>
Hi there,
We are in the middle of designing the structure of a new system.
I have read/heard that it is best to break down the plans into the
following categories:
Business Classes
Managers/Services
Clients
I have a few questions about this structure:
Should related business classes be grouped together in Plans? E.g. if
you have an Employee class with related EmployeeSubordinate and
EmployeeSalaryHistory classes, should these all be in the same plan?
Why should the Managers be separated from their business classes?
E.g. if there is an EmployeeMgr service which deals with anything to do
with the Employee business class, why separate them in different
plans? If you need the manager to access the class, you will always
need both.
Some of the Forte documentation talks about "Policy" managers and
"Database" managers. How do the functions of these managers differ
for a simple CRUD (Create Read Update Delete) class?
If you have the Database managers separate, what scope does each
DB manager cover? I.e. do you have one for the entire database (over
100 tables in our case), or do you break it down by sub-system?
Thanks in advance for any answers.
Cheers,
Duncan Kinnear,
McCarthy and Associates, Email: [email protected]
PO Box 764, McLean Towers, Phone: +64 6 834 3360
Shakespeare Road, Napier, New Zealand. Fax: +64 6 834 3369
Providing Integrated Software to the Meat Processing Industry for over 10 years
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>
Get Your Private, Free Email at http://www.hotmail.com
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>

Legality questions about Home Sharing

I have some legality questions about Apple's Home Sharing technology.
As I understand it, you can share (that is, copy it from one computer to another) your music, movies, applications and other iTunes-managed files amongst five computers. The only 'trick' is that each computer must have an iTunes Store account and must be logged in in order for it to work.
My question concerns the copying aspect and the legality of it. For content that was purchased through the iTunes Store I can see how Home Sharing can provide a limitation on content sharing, since all of the machines would need to be connected to Apple's servers in order for the validation process to happen. But what about content that was added to iTunes through other means, e.g., ripping my own CDs or converting my DVDs? These items can still be copied via Home Sharing and as there's no DRM on them there's no way they can be protected against "illegal" or "unauthorized" use.
It was my understanding that if I gave a copy of a song to someone else, that's illegal. Apple's Home Sharing technology seems to facilitate this action. If I rip a CD or DVD into iTunes and someone copies it out, isn't that making an illegal copy? Can I be held liable for distribution of content?
And how far does this extend? If I live in a house with four unrelated people, are they legally (?) allowed to copy music and media amongst each another? Is there a perceived or actual difference between using Home Sharing to copy a movie versus, say, using a USB flash drive? And what if one of them moves out? Am I legally obligated to go through that person's hard drive and remove content that they copied from me before they leave the building?
Does Home Sharing somehow retroactively change the copyright application on a given CD or DVD? Most of my CDs and DVDs contain notices and warnings against distributing copies. Can these warnings now be ignored, or at least amended with "...unless you're using iTunes Home Sharing" at the ends of them?
I am not trying to stir up a hornet's nest here. I'm only trying to better understand the legal issues surrounding Home Sharing and particularly how they relate to unprotected content. It seems very contradictory that the RIAA and MPAA would be fighting so hard against peer-to-peer services like BitTorrent and Gnutella while apparently allowing peer-to-peer services through iTunes Home Sharing.
Furthermore, I also understand that the intention of this system was to allow families who are living together to have common access to all of the "household" music, but my issues aren't about this. I envision, for example, a college dorm building where there's several hundred people living together on the same network subnet, and all of them have Home Sharing enabled and everyone is copying thousands and thousands of songs to/from one another. Is this now legal?
Any insights would be appreciated. Thanks.

If I rip a CD or DVD into iTunes and someone copies it out, isn't that making an illegal copy?
RIPping of commercial, encrypted DVDs (most of them) is illegal to begin with. Or rather, breaking the encryption on a DVD is illegal and in order to RIP the DVD, you must break the encryption. SO you have already "broken the law" by having a copy on your computer.
Most of my CDs and DVDs contain notices and warnings against distributing copies.
Most of your DVDs have a notice about even simply making a copy, not only distributing copies.
Much of your post has been cussed and discussed by many, many people (lawyers, corporations, organizations, individuals, etc.) and no one has come (or likely ever will come) to a complete agreement.
Generally, "sharing" in the same house hold amongst family members seems to be okay. Outside the same household/family is almost always not okay.
I envision, for example, a college dorm building where there's several hundred people living together on the same network subnet, and all of them have Home Sharing enabled and everyone is copying thousands and thousands of songs to/from one another. Is this now legal?
No.
This is exactly what Napster was and why they were sued & shut down.
I imagine Apple lawyers have done their homework as well as consulted with the labels to discuss these exact issues.
And it's called "Home Sharing" to indicate that it is not "Dorm Sharing" or "Workplace Sharing", or even simply "Library Sharing"etc. even though it may be possible to use it in other places than the Home.
Users on other computers need to know your iTunes ID and password to enable it Home Sharing. Likely this is how Apple got the lables to be okay with it.
Are you gonna give (and get) dozens/hundreds/thousands/any other users your iTunesID & password?
You can contact Apple Legal here -> http://www.apple.com/legal

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Ah well... thanks for the quick answer
Message was edited by: Guðlogi

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