RE: Fun with compound primary keys
Can someone explain this question to me? -Original Message- From: Tin Hoc Pt [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 10, 2000 1:25 PM To: Orion-Interest Subject: RE: Fun with compound primary keys mkgjfkgjfkgnjkjgfgrfg
RE: Fun with compound primary keys
I think it will become clearer when someone removes the gaffa tape from his mouth Something to do with EJB deployment is my guess. At 07:39 10/05/2001 -0500, you wrote: Can someone explain this question to me? -Original Message- From: Tin Hoc Pt [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 10, 2000 1:25 PM To: Orion-Interest Subject: RE: Fun with compound primary keys mkgjfkgjfkgnjkjgfgrfg -- Dan North Development Team - Cadrion Consulting Ltd - +44 (0)20 7440 9550 CONFIDENTIALITY This e-mail and any attachments are confidential and may also be privileged. If you are not the named recipient, please notify the sender immediately and do not disclose the contents to another person, use it for any purpose, or store or copy the information in any medium
RE: Fun with compound primary keys
Clearly this is a cryptography problem. I have applied advanced cryptographic techniques to this message (a character shifting algorythm, actually) and decoded the message as follows: CIPHERTEXT mkgjfkgjfkgnjkjgfgrfg PLAIN TEXT: omilhjilhjipljlihithi Obviously. --- Dan North [EMAIL PROTECTED] wrote: I think it will become clearer when someone removes the gaffa tape from his mouth Something to do with EJB deployment is my guess. At 07:39 10/05/2001 -0500, you wrote: Can someone explain this question to me? -Original Message- From: Tin Hoc Pt [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 10, 2000 1:25 PM To: Orion-Interest Subject: RE: Fun with compound primary keys mkgjfkgjfkgnjkjgfgrfg = - Mr Lauren Commons A person of moderate zeal __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
RE: Fun with compound primary keys
Yep, if you don't make things serializable you get null as a 'value'. That applies to return values crossing the wire as well :-). Note that, to prevent yourself from having more fun! FE On Tuesday, May 08, 2001 2:43 AM, Michael Jara [SMTP:[EMAIL PROTECTED]] wrote: It took me a while to figure this out, so I thought I'd post it. If you are using a compound primary key class in your CMP entity bean, and you forget to make it implement java.io.Serializable, Orion may do some really strange things. In my case, I have an entity bean which represents a many to many mapping of other entity beans, called TypeDescriptionPair. This entity bean's create method took two other entity beans as parameters, EventType and EventDescription. The create method would simply extract the primary key from each of these and store it. So, I was doing something like this to test the implementation: ... eventTypes[0] = eventTypeHome.create(0, eventType0); eventTypes[1] = eventTypeHome.create(1, eventType1); ... eventDescription[0] = eventTypeHome.create(0, eventDescription0); eventDescription[1] = eventTypeHome.create(1, eventDescription1); ... typeDescriptionPairHome.create(eventTypes[0], eventDescription[0]); typeDescriptionPairHome.create(eventTypes[1], eventDescription[1]); The very last statement would throw a CreateException, because all EventType and EventDescription remote objects had mysteriously been nullified! After hours of debugging, I realized that TypeDescriptionPairs primary key class did not implement java.io.Serializable. As soon as I added implements java.io.Serailzable to the primary key class, everything was magically fixed. Mike File: ATT3.html
RE: Fun with compound primary keys
There have been official comments on this list to the effect that unintuitive error messages should be considered bugs. You should file a bugzilla report :-) Jeff -Original Message- From: Michael Jara [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 09, 2001 9:36 AM To: Orion-Interest Subject: Re: Fun with compound primary keys Unfortunately, it wasn't quite that simple. Since I was using CMP, my ejbCreate was returning 'null' anyway. If Orion, internally somewhere, was trying to serialize the primary key class, you would expect that it would throw an exception or at least kill the entity bean on which it was performing operations. In my case, it was killing all references to the entity beans passed in as parameters! And it was doing so only after the first creation of the faulty entity bean (e.g. one was successfully created, the next one had problems.) This is, of course, not a bug in Orion. It's just counter-intuitive behavior which occurs when the bean developer (me) does something stupid. :) Mike - Original Message - From: Frank Eggink [EMAIL PROTECTED] To: Orion-Interest [EMAIL PROTECTED] Sent: Tuesday, May 08, 2001 2:20 PM Subject: RE: Fun with compound primary keys Yep, if you don't make things serializable you get null as a 'value'. That applies to return values crossing the wire as well :-). Note that, to prevent yourself from having more fun! FE On Tuesday, May 08, 2001 2:43 AM, Michael Jara [SMTP:[EMAIL PROTECTED]] wrote: It took me a while to figure this out, so I thought I'd post it. If you are using a compound primary key class in your CMP entity bean, and you forget to make it implement java.io.Serializable, Orion may do some really strange things. In my case, I have an entity bean which represents a many to many mapping of other entity beans, called TypeDescriptionPair. This entity bean's create method took two other entity beans as parameters, EventType and EventDescription. The create method would simply extract the primary key from each of these and store it. So, I was doing something like this to test the implementation: ... eventTypes[0] = eventTypeHome.create(0, eventType0); eventTypes[1] = eventTypeHome.create(1, eventType1); ... eventDescription[0] = eventTypeHome.create(0, eventDescription0); eventDescription[1] = eventTypeHome.create(1, eventDescription1); ... typeDescriptionPairHome.create(eventTypes[0], eventDescription[0]); typeDescriptionPairHome.create(eventTypes[1], eventDescription[1]); The very last statement would throw a CreateException, because all EventType and EventDescription remote objects had mysteriously been nullified! After hours of debugging, I realized that TypeDescriptionPairs primary key class did not implement java.io.Serializable. As soon as I added implements java.io.Serailzable to the primary key class, everything was magically fixed. Mike File: ATT3.html
RE: Fun with compound primary keys
mkgjfkgjfkgnjkjgfgrfg
