Pierce Ng wrote:
On Wed, Aug 02, 2017 at 11:30:27AM +0200, Herby Vojčík wrote:
Hm, I though that once I open a session it does actually connect on
demand (it has Login, system and all the information for it). Does
it actually mean that if I want to stay connected I must do `session
login` before each `session inUnitOfWorkDo:`?
No.
Great.
As written above, I thought glorp manages this kind of reconnection
itself. If not, can someone point me to the some example where this
is managed? I am asking because in Glorp book I did not find
anything about this (I have read it).
If used with Seaside, typically when a Seaside session is started, your
application's custom subclass of WASession starts a database session, be it for
Glorp, some other OODB, good olde SQL, etc. From Sven's Reddit.st:
RedditSession>>glorpSession
glorpSession ifNil: [ glorpSession := self newGlorpSession ].
Yeah, I ended up with this. And planning to set it to nil on each image
loading (not sure how, yet, I don't want to register a class as a
handler, but I'll manage, I hope).
glorpSession accessor isLoggedIn
ifFalse: [ glorpSession accessor login ].
Looking at state of the art code:
DatabaseAccessor >> login
| |
self loginIfError: [:ex |
ex pass].
"Just to help avoid confusion if someone thinks they're getting a login
object back from this"
^nil.
GlorpSession >> isLoggedIn
^accessor isLoggedIn
GlorpSession >> login
self isLoggedIn ifTrue: [^nil].
^self loginIfError: [:ex | ex pass]
GlorpSession >> loginIfError: aBlock
| result |
result := self accessor loginIfError: aBlock.
system platform characterEncoding: accessor encoding.
^result
it seems this `... ifFalse: ...` is in fact the same thing as
`glorpSession login` (yes, it does set an encoding, but otherwise, it's
the same, isn't it)?
Doesn't this counter the previous "no", in fact? If I do all operations
via `self glorpSession doSomething`, then it actually does `glorpSession
login` before each action...
^ glorpSession
See the senders of #glorpSession.
Also read the chapters of HPI's Seaside tutorial on tasks& sessions, and
persistence.
http://www.hpi.uni-potsdam.de/hirschfeld/seaside/tutorial
1. Link does not load.
2. I am doing it with ZnServer, no Seaside there.
Pierce
Thanks, Herby
