Magma August 2006

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[BUG]MaObjectFiler>>open
by Steve Moffitt 15 Aug '06

15 Aug '06

Hi Chris That was what I was wondering -- expected behavior. Thanks for the help. Steve

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[BUG]MaObjectFiler>>open
by Steve Moffitt 15 Aug '06

15 Aug '06

Hi -- I started having a significant ( 20 sec ) delay after my image has opened til it even begins to respond to any user input. I was using 3.8-6665 as image and Unix 3-7-7 as VM. I tried using another vm and got this walkback. It appears that on startup it is trying to open the repository. Finishing the session I did myMagmaSession disconnect; closeRepository. Is there some way to prevent this ? Used MagmaServerLoader17 in new image and it repeated this behaviour -- help. thanks Steve 15 August 2006 9:44:41 am VM: Mac OS - a SmalltalkImage Image: Squeak3.8 [latest update: #6665] SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir Macintosh HD:Users:brendamoffitt:Desktop:Larry:Squeak:Squeak3.8 Trusted Dir Macintosh HD:Users:brendamoffitt:Desktop:Larry:Squeak:Squeak3.8 Untrusted Dir Macintosh HD:Users:brendamoffitt:Library:Preferences:Squeak:Internet:My Squeak MaObjectFiler>>open Receiver: a MaObjectFiler Arguments and temporary variables: Receiver's instance variables: directory: UnixFileDirectory on '/myRepository' file: nil preMadeObjectBuffer: a MaObjectBuffer oid : **invalid** classId : **invalid*...etc... filePositionIndex: nil usedByteArrays: #(a ByteArray(0) a ByteArray(0 0) a ByteArray(0 0 0) a ByteArra...etc... primitiveAttributeAddressesMap: a Dictionary('anchorOid'->43->64 'booleanFlags'...etc... MaObjectFiler class>>open: Receiver: MaObjectFiler Arguments and temporary variables: aFileDirectory: UnixFileDirectory on '/myRepository' Receiver's instance variables: superclass: MaObject methodDict: a MethodDictionary(#anchorOid->a CompiledMethod (3055) #anchorOid:-...etc... format: 142 instanceVariables: #('directory' 'file' 'preMadeObjectBuffer' 'filePositionInde...etc... organization: ('accessing' anchorOid classDefinitionsOid dataFileName definitio...etc... subclasses: nil name: #MaObjectFiler classPool: nil sharedPools: nil environment: a SystemDictionary(lots of globals) category: nil MaObjectRepository>>open: Receiver: a MaObjectRepository Arguments and temporary variables: aFileDirectory: UnixFileDirectory on '/myRepository' Receiver's instance variables: transactionLog: a MaTransactionLog sessions: a Dictionary() filer: nil repositoryController: a MagmaRepositoryController largeCollectionManagers: a Dictionary() systemReadStrategy: nil nextOid: nil recoveryManager: nil commitGuard: a Monitor applyProcess: nil wantsToClose: nil MaObjectRepository class>>open:controller: Receiver: MaObjectRepository Arguments and temporary variables: aFileDirectory: UnixFileDirectory on '/myRepository' aMaRepositoryController: a MagmaRepositoryController Receiver's instance variables: superclass: MaObject methodDict: a MethodDictionary(#abortTransactionFor:->a CompiledMethod (2379) #...etc... format: 152 instanceVariables: #('transactionLog' 'sessions' 'filer' 'repositoryController'...etc... organization: ('client-requests' abortTransactionFor: fractionLoaded: getTrunkF...etc... subclasses: nil name: #MaObjectRepository classPool: a Dictionary(#RunningTestCases->false #SimulateOutage- >false ) sharedPools: nil environment: a SystemDictionary(lots of globals) category: nil --- The full stack --- MaObjectFiler>>open MaObjectFiler class>>open: MaObjectRepository>>open: MaObjectRepository class>>open:controller: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MagmaRepositoryController>>privateOpen: [] in MagmaRepositoryController>>open {[self privateOpen: directory]} BlockContext>>on:do: MagmaRepositoryController>>open MagmaRepositoryController>>ensureOpen [] in MagmaRepositoryController class>>startUp: {[each ensureOpen]} BlockContext>>on:do: [] in MagmaRepositoryController class>>startUp: {[[each ensureOpen] on: MagmaNotification do: [:noti | Transcript cr;...]} BlockContext>>on:do: [] in MagmaRepositoryController class>>startUp: {[:each | [[each ensureOpen] on: MagmaNotification do: [:noti | Trans...]} Set>>do: MagmaRepositoryController class>>startUp: MagmaSession class>>startUp: [] in SystemDictionary>>send:toClassesNamedIn:with: {[:name | class := self at: name ifAbsent: []. class ifNil: [remo...]} OrderedCollection>>do: SystemDictionary>>send:toClassesNamedIn:with: SystemDictionary>>processStartUpList: SmalltalkImage>>snapshot:andQuit:embedded: SmalltalkImage>>snapshot:andQuit: TheWorldMenu>>saveAndQuit TheWorldMenu>>doMenuItem:with: [] in MenuItemMorph>>invokeWithEvent: {[(selArgCount := selector numArgs) = 0 ifTrue: [target perform: selector] ...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: MenuItemMorph>>invokeWithEvent: MenuItemMorph>>mouseUp: MenuItemMorph>>handleMouseUp: MouseButtonEvent>>sentTo: MenuItemMorph(Morph)>>handleEvent: MorphicEventDispatcher>>dispatchDefault:with: ...etc...

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Re: refreshing an object
by Chris Muller 15 Aug '06

15 Aug '06

Normally, objects are only ever refreshed upon crossing a transaction boundary; begin and commit, at outer-most transaction-level only, and abort (which resets transaction level back to 0). There is one special situation _if you are not in a transaction_, where your view will be refreshed (via abort) automatically. It happens when you have not crossed a transaction boundary in a long time and other sessions have piled up lots of changes against your session (see #hasExcessiveNumberOfChallengers). In this case, for the health of the server, the client will perform an abort automatically, causing objects to be refrshed. If you are in a transaction and not ready to commit or abort.. I guess you're out of luck.. We probably need a "continue" like GemStone..?

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refreshing an object
by Brent Pinkney 15 Aug '06

15 Aug '06

Hi Chris, I wonder if you could shed some light on how to refresh an object which has already been materialised into an image. Concider a web application where a user has selected an object from a list and then opened another page with this object. Whilst the user is viewing the details of the object, another image has modified one or more objects reachable from this object (e.g instance varaibles or objects reachable from instnce variables). If the user now refreshed the web page, how do I releably and quite cheaply ensure that the newest values are displayed to the user ? Thanks Brent

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Magma +Seaside (was Qustion about validate: has:)
by Brent Pinkney 15 Aug '06

15 Aug '06

Hi Chris, Keith, > Magma + Seaside > Would you guys mind collaborating to be sure what we have is "one good > thing" and not "two separate pretty good almost-the-same things"? Sure - I did release a new 'Magma seaside' and sushi store changeset a few days ago which works with Chris's latest Magma release. I would welcome some feeback and collaboration on the seaside integration - there is a lot we still need to do (eg. shared sessions, preallocated sessions) that I would like for our own applications. PS, to answer a question from the list: I released the sushi store chages as a changeset as it only makes very minor changes to the Seaside demo and I wanted to emphasise that - changesets are often better at isolating a few changes than monticello IMO. A small changeset really shows how little effort it required to add Magma to an application. I would also like to invite all of us to use the mailing list more often - there arre other lurkers who might add be able to add something to our discussions. Cheers Brent

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Re: Qustion about validate: has:
by Chris Muller 12 Aug '06

12 Aug '06

> I must admit I care much for the implementation, I must admit I *don't* care much for the implementation, ...

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Qustion about validate: has:
by keith hodges 11 Aug '06

11 Aug '06

I found this code but I am wondering why not use #respondsTo: Keith ==== validate: className has: selector (Smalltalk hasClassNamed: className) ifFalse: [ "No validation needed" ^ self ]. ((Smalltalk at: className) basicNew perform: selector) ifFalse: [ MaObjectSerializationUserError signal: 'Need to implement ', selector, ' on ', className ] ____________________________________________________ Yahoo! Photos is now offering a quality print service from just 7p a photo. http://uk.photos.yahoo.com

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Re: Magma Tests
by Chris Muller 11 Aug '06

11 Aug '06

Greetings ernst, Those projects are part of the "3.7 Full" image. Magma runs a test where client2 purges those projects, client1 persists those projects in the database, then client2 materializes them. The 3.8 image did not include those projects, so the best and only thing it can do is open a warning like it does. The projects test is a great test and does work (or, did in 3.7, at least), but no one really uses Magma to persist Projects to my knowledge. A lockup will occur if you start the test cases with a Transcript open. This is not your fault, its a bug in 3.8 which causes Squeak to lock up when many displays are made to the Transcript from a background process. This problem did not happen in 3.7 but does in 3.8 for some reason. Therefore, before kicking off the test cases, be sure to: 1. Delete the "Magma", "Peer", and "compressed" folders (if they exist) from the testEnvironmentDirectory you specified from running prior tests. 2. Close any Transcript windows on the desktop. The test script will open a Transcript on the conductor image so that you may monitor the progress of the test. THEN run MagmaTestCase kickoff. I'm glad to see you running the test cases. Would you mind telling me what platform you're running them on? Thanks, Chris --- ernst <ernst(a)hisplace.net> wrote: > I am new to Magma (and Squeak) and have installed the tester > according to: > http://minnow.cc.gatech.edu/squeak/2657 > > Then I try to run tests according to: > http://minnow.cc.gatech.edu/squeak/2661 > MagmaTestCase kickoff > > A message says 'Building with Squeak' 'Fun with Morphic' 'Fun With > Music' are > missing. > Then a Transcript opens which freezes and does not show anything even > after an > hour. > Maybe it's the missing projects. I had no luck trying to find them > wit Squeak > Map or Monticello or on www.squeaksource.com > > Thanks for any help. > Ernst > _______________________________________________ > Magma mailing list > Magma(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/magma > > >

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Magma Tests
by ernst 10 Aug '06

10 Aug '06

I am new to Magma (and Squeak) and have installed the tester according to: http://minnow.cc.gatech.edu/squeak/2657 Then I try to run tests according to: http://minnow.cc.gatech.edu/squeak/2661 MagmaTestCase kickoff A message says 'Building with Squeak' 'Fun with Morphic' 'Fun With Music' are missing. Then a Transcript opens which freezes and does not show anything even after an hour. Maybe it's the missing projects. I had no luck trying to find them wit Squeak Map or Monticello or on www.squeaksource.com Thanks for any help. Ernst

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Upgrading legacy repositories
by Chris Muller 10 Aug '06

10 Aug '06

Sorry, I forgot to mention! Anyone who has legacy repositories from the pre-queries release posted yesterday will no longer be able to open them with the new version unless you run: MagmaRepositoryController upgrade5To6: fullyQualifiedPathString I tested this on an output repository from running full test suite of version 5 and was then able to open it and browse around in version 6. Of course, I would back up my database files before doing an upgrade even if it was Oracle.. - Chris

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Magma August 2006