July 2017 - Pharo-users - lists.pharo.org

Peristence with SandStone or Voyage -> Bypassing the saving of a variable.

by sergio ruiz

So, I tried using mongo voyage for persistence of my Models, and when trying to the SsStateMachine, Mongo Voyager had problems figuring out what to do with my state machine..Â So, it occurred to me.. the state machine really does nothing but guide the order through its journey. By the time the order is complete, the state machine is irrelevant.. and there is no chance that the state machine will ever be relevant..Â So, my question is..Â Is there any way to mark a variable (like statemachine) as âdo not persistâ?Â This would solve all my problems.. Thanks! ---- peace, sergio photographer, journalist, visionary Public Key:Â http://bit.ly/29z9fG0 #BitMessageÂ BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

July 13, 2017

Re: [Pharo-users] Using SandstoneDB for persistance. Getting error.

by sergio ruiz

What is happening is that when the StateMachine gets set up in order initialization, the guarded condition is set.. when you pass a MessageSend to it, it just evaluates to the value of that message send on initialization.. When you pass a block to it, the block is evaluated every time the call is made.. On July 13, 2017 at 10:46:21 AM, Denis Kudriashov (dionisiydk(a)gmail.com) wrote: Try to debug what happens when you pass message send instead of block. Maybe StateMachine code perform some explicit check isBlockClosure. ---- peace, sergio photographer, journalist, visionary Public Key:Â http://bit.ly/29z9fG0 #BitMessageÂ BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

July 13, 2017

Re: [Pharo-users] Is there a 64bit minimal image for either 6.0 or 7.0?

by Tim Mackinnon

I think there is something wrong with the minimal image - but it looks like the following has nudged me a bit closer (rather inelegantly but I think the minimal images may need checking for errors): MCFileTreeRepository methods do: [ :m | m recompile ]. MCFileTreeStCypressReader methods do: [:m | m recompile ]. MCFileTreeAbstractReader methods do: [:m | m recompile ]. Tim > On 13 Jul 2017, at 18:18, Tim Mackinnon <tim(a)testit.works> wrote: > > Thinking about this a bit more - if the minimal image is too minimal, and I load in some required classes - do I need to force methods to recompile to pick up the now loaded classes? > > Is there an easy way to do that? > > Tim > >> On 13 Jul 2017, at 17:40, Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>> wrote: >> >> Hmmm - its very, very minimalâ¦ I am trying to load in my local code (checked out from git) with: >> >> Metacello new >> repository: 'filetree://../src <filetree://../src>'; >> baseline: 'Lambda'; >> load. >> >> However I get an error: MCFileTreeRepository>>repositoryProperties (STON is Undeclared) >> >> As Iâm guessing that STON is not in that minimal image - I have tried to load ConfigurationOfSton into the image first by doing: >> ./pharo Pharo.image config http://ss3.gemstone.com/ss/STON <http://ss3.gemstone.com/ss/STON> ConfigurationOfSton --install=stable â-save >> >> It looks like this does load it, however when I then run my commands to load my code into the new image with: >> ./pharo Pharo.image --no-default-preferences --save --quit st loadLocal.st <http://loadlocal.st/> >> (loadLocal.st <http://loadlocal.st/> has the Metacello expression I first mentioned) - I still seem to be getting an error as if STON is not in the image, >> E.g. >> UndefinedObject class>>fromStream: >> And PharoDebug has lines confirming this (pointing at the method #repositoryProperties): >> 27 MessageNotUnderstood(Exception)>>signal >> 28 UndefinedObject class(Object)>>doesNotUnderstand: #fromStream: >> 29 repositoryProperties >> repositoryProperties >> ifNil: [ >> >> At this point, I am having trouble loading this minimal image with a ui, but if I use the command line and use the âevalâ command line handler, and do something like: >> ./pharo Pharo.image eval "(Smalltalk at: #STONReader) class methods" >> {STONReader class>>#on:} >> It is showing me methods as if the class is there. Can anyone think of what I might be doing wrong? Or could try? >> >> Tim >> >>> On 13 Jul 2017, at 08:47, Pavel Krivanek <pavel.krivanek(a)gmail.com <mailto:pavel.krivanek@gmail.com>> wrote: >>> >>> For Pharo 6: https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess… <https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess…> >>> For Pharo 7: https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu… <https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu…> >>> >>> -- Pavel >>> >>> 2017-07-13 8:10 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: >>> That would be great. I'm keen to see if I can reproduce what Sven seemed to measure where he seemed to get image launch times down. >>> >>> Currently on Lambda I am seeing an avg 3.5s to return a simple result. >>> >>> I know that 700ms of this is the overhead of a nodejs shim (the golang Sparta project has reported this aspect). >>> >>> So I'm curious if a smaller image (& no sources) could get me into a sub 2s range) >>> >>> Tim >>> >>> Sent from my iPhone >>> >>> >>> >>> Sent from my iPhone >>> On 13 Jul 2017, at 06:51, Pavel Krivanek <pavel.krivanek(a)gmail.com <mailto:pavel.krivanek@gmail.com>> wrote: >>> >>>> Hi Tim, >>>> >>>> I will prepare jobs that will convert them to 64bits. >>>> >>>> -- Pavel >>>> >>>> 2017-07-12 23:14 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: >>>> Hi - I would like to try a minimal image on AWS lambda (so I need a 64 bit version). >>>> >>>> Is there a 64bit image for either 6.0 or 7.0 that is easy to download? >>>> >>>> I can see - http://get.pharo.org/60-minimal <http://get.pharo.org/60-minimal> but it doesnât say its 64 bit, so I assume its 32bit? >>>> >>>> Tim >>>> >>> >> >

July 13, 2017

Re: [Pharo-users] Is there a 64bit minimal image for either 6.0 or 7.0?

by Tim Mackinnon

Thinking about this a bit more - if the minimal image is too minimal, and I load in some required classes - do I need to force methods to recompile to pick up the now loaded classes? Is there an easy way to do that? Tim > On 13 Jul 2017, at 17:40, Tim Mackinnon <tim(a)testit.works> wrote: > > Hmmm - its very, very minimalâ¦ I am trying to load in my local code (checked out from git) with: > > Metacello new > repository: 'filetree://../src <filetree://../src>'; > baseline: 'Lambda'; > load. > > However I get an error: MCFileTreeRepository>>repositoryProperties (STON is Undeclared) > > As Iâm guessing that STON is not in that minimal image - I have tried to load ConfigurationOfSton into the image first by doing: > ./pharo Pharo.image config http://ss3.gemstone.com/ss/STON <http://ss3.gemstone.com/ss/STON> ConfigurationOfSton --install=stable â-save > > It looks like this does load it, however when I then run my commands to load my code into the new image with: > ./pharo Pharo.image --no-default-preferences --save --quit st loadLocal.st <http://loadlocal.st/> > (loadLocal.st <http://loadlocal.st/> has the Metacello expression I first mentioned) - I still seem to be getting an error as if STON is not in the image, > E.g. > UndefinedObject class>>fromStream: > And PharoDebug has lines confirming this (pointing at the method #repositoryProperties): > 27 MessageNotUnderstood(Exception)>>signal > 28 UndefinedObject class(Object)>>doesNotUnderstand: #fromStream: > 29 repositoryProperties > repositoryProperties > ifNil: [ > > At this point, I am having trouble loading this minimal image with a ui, but if I use the command line and use the âevalâ command line handler, and do something like: > ./pharo Pharo.image eval "(Smalltalk at: #STONReader) class methods" > {STONReader class>>#on:} > It is showing me methods as if the class is there. Can anyone think of what I might be doing wrong? Or could try? > > Tim > >> On 13 Jul 2017, at 08:47, Pavel Krivanek <pavel.krivanek(a)gmail.com <mailto:pavel.krivanek@gmail.com>> wrote: >> >> For Pharo 6: https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess… <https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess…> >> For Pharo 7: https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu… <https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu…> >> >> -- Pavel >> >> 2017-07-13 8:10 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: >> That would be great. I'm keen to see if I can reproduce what Sven seemed to measure where he seemed to get image launch times down. >> >> Currently on Lambda I am seeing an avg 3.5s to return a simple result. >> >> I know that 700ms of this is the overhead of a nodejs shim (the golang Sparta project has reported this aspect). >> >> So I'm curious if a smaller image (& no sources) could get me into a sub 2s range) >> >> Tim >> >> Sent from my iPhone >> >> >> >> Sent from my iPhone >> On 13 Jul 2017, at 06:51, Pavel Krivanek <pavel.krivanek(a)gmail.com <mailto:pavel.krivanek@gmail.com>> wrote: >> >>> Hi Tim, >>> >>> I will prepare jobs that will convert them to 64bits. >>> >>> -- Pavel >>> >>> 2017-07-12 23:14 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: >>> Hi - I would like to try a minimal image on AWS lambda (so I need a 64 bit version). >>> >>> Is there a 64bit image for either 6.0 or 7.0 that is easy to download? >>> >>> I can see - http://get.pharo.org/60-minimal <http://get.pharo.org/60-minimal> but it doesnât say its 64 bit, so I assume its 32bit? >>> >>> Tim >>> >> >

July 13, 2017

Re: [Pharo-users] Is there a 64bit minimal image for either 6.0 or 7.0?

by Tim Mackinnon

Hmmm - its very, very minimalâ¦ I am trying to load in my local code (checked out from git) with: Metacello new repository: 'filetree://../src'; baseline: 'Lambda'; load. However I get an error: MCFileTreeRepository>>repositoryProperties (STON is Undeclared) As Iâm guessing that STON is not in that minimal image - I have tried to load ConfigurationOfSton into the image first by doing: ./pharo Pharo.image config http://ss3.gemstone.com/ss/STON ConfigurationOfSton --install=stable â-save It looks like this does load it, however when I then run my commands to load my code into the new image with: ./pharo Pharo.image --no-default-preferences --save --quit st loadLocal.st <http://loadlocal.st/> (loadLocal.st <http://loadlocal.st/> has the Metacello expression I first mentioned) - I still seem to be getting an error as if STON is not in the image, E.g. UndefinedObject class>>fromStream: And PharoDebug has lines confirming this (pointing at the method #repositoryProperties): 27 MessageNotUnderstood(Exception)>>signal 28 UndefinedObject class(Object)>>doesNotUnderstand: #fromStream: 29 repositoryProperties repositoryProperties ifNil: [ At this point, I am having trouble loading this minimal image with a ui, but if I use the command line and use the âevalâ command line handler, and do something like: ./pharo Pharo.image eval "(Smalltalk at: #STONReader) class methods" {STONReader class>>#on:} It is showing me methods as if the class is there. Can anyone think of what I might be doing wrong? Or could try? Tim > On 13 Jul 2017, at 08:47, Pavel Krivanek <pavel.krivanek(a)gmail.com> wrote: > > For Pharo 6: https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess… <https://ci.inria.fr/pharo/job/Pharo-6.0-Update-Step-3.2-Minimal/lastSuccess…> > For Pharo 7: https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu… <https://ci.inria.fr/pharo/view/7.0/job/70-Bootstrap-32bit-Conversion/lastSu…> > > -- Pavel > > 2017-07-13 8:10 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: > That would be great. I'm keen to see if I can reproduce what Sven seemed to measure where he seemed to get image launch times down. > > Currently on Lambda I am seeing an avg 3.5s to return a simple result. > > I know that 700ms of this is the overhead of a nodejs shim (the golang Sparta project has reported this aspect). > > So I'm curious if a smaller image (& no sources) could get me into a sub 2s range) > > Tim > > Sent from my iPhone > > > > Sent from my iPhone > On 13 Jul 2017, at 06:51, Pavel Krivanek <pavel.krivanek(a)gmail.com <mailto:pavel.krivanek@gmail.com>> wrote: > >> Hi Tim, >> >> I will prepare jobs that will convert them to 64bits. >> >> -- Pavel >> >> 2017-07-12 23:14 GMT+02:00 Tim Mackinnon <tim(a)testit.works <mailto:tim@testit.works>>: >> Hi - I would like to try a minimal image on AWS lambda (so I need a 64 bit version). >> >> Is there a 64bit image for either 6.0 or 7.0 that is easy to download? >> >> I can see - http://get.pharo.org/60-minimal <http://get.pharo.org/60-minimal> but it doesnât say its 64 bit, so I assume its 32bit? >> >> Tim >> >

July 13, 2017

Seamless - send collections by value

by Petr Fischer

Hello, I am testing Seamless project (https://github.com/dionisiydk/Seamless) but I did not understand one thing: I have (for example) a Person class in my server and client image. Person class implements: Person>>sseamlessDefaultTransferStrategy ^SeamlessTransferStrategy defaultByValue so all Person instances are serialized from server to client image. Good. But when I have server method, for example, getPersons, that returns a collection (OrderedCollection) of Person instances, this collection is passed by reference (or not?). OrderedCollection inherits transfer strategy from Object, which is "by reference". So in client image, when I iterate this collection, too many (thousands) requests occurs. How to manage only this specific collection (returned from getPersons) to pass by value from server to client (to be completely serialized and copied to the client image), so when I iterate this collection in client image to avoid additional network requests (proxying)? Thanks! pf

July 13, 2017

Re: [Pharo-users] Using SandstoneDB for persistance. Getting error.

by sergio ruiz

Hmm.. let me try that.. I think it might be wiser at this point to find a more suitable persistence model. i was just looking for something that would work for a week or so until i needed to make this production ready..Â looking at how this project is moving now (itâs done, and ready to start doing real world work).. i think i just need to settle on what is going to be the final production datastore and set that up.. thanks! On July 13, 2017 at 10:46:21 AM, Denis Kudriashov (dionisiydk(a)gmail.com) wrote: Try to debug what happens when you pass message send instead of block. Maybe StateMachine code perform some explicit check isBlockClosure. ---- peace, sergio photographer, journalist, visionary Public Key:Â http://bit.ly/29z9fG0 #BitMessageÂ BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

July 13, 2017

Re: [Pharo-users] Using SandstoneDB for persistance. Getting error.

by Denis Kudriashov

2017-07-13 14:44 GMT+02:00 sergio ruiz <sergio.rrd(a)gmail.com>: > I tried this.. but what happens when i change this to message sends (it > does save) is that the state machine no longer works. The reason for this > being that when he state machine is initialized, itâs initialized with the > result of the message send, I think this needs to be a block so that it is > evaluate as the state machine moves through state.. Try to debug what happens when you pass message send instead of block. Maybe StateMachine code perform some explicit check isBlockClosure.

July 13, 2017

Re: [Pharo-users] Using SandstoneDB for persistance. Getting error.

by sergio ruiz

Okay, got it.. I tried this.. but what happens when i change this to message sends (it does save) is that the state machine no longer works. The reason for this being that when he state machine is initialized, itâs initialized with the result of the message send, I think this needs to be a block so that it is evaluate as the state machine moves through state.. I think i am gonna take a quick look at Magma.. and see if this will suit my needs.. Thanks! On July 11, 2017 at 2:53:35 PM, Ramon Leon (ramon.leon(a)allresnet.com) wrote: machine as part of the Order; SandstoneDb doesn't support saving blocks.Â I'd try what Dennis Suggested and store message sends rather than blocksÂ for the guarded method, then it might save fine. Inspect the stateÂ machine, any use of blocks has to be removed/changed to message sends inÂ ---- peace, sergio photographer, journalist, visionary Public Key:Â http://bit.ly/29z9fG0 #BitMessageÂ BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

July 13, 2017

Little challenge: Best way to read stream and count line returns

by Cyril Ferlicot

Hello everyone, I often needs to read some streams these days and to get some infos related to the lines returns for example. Because of the CRLF it is a little complicated sometimes. I have an example of code here: | lfShouldBeCounted char count remaining | lfShouldBeCounted := false. remaining := 0. count := 0. stream position: startPos. [ stream position = endPos ] whileFalse: [ "13 is a CR, 10 a LF" (char := stream next asInteger) = 13 ifTrue: [ count := count + 1. remaining := 0. lfShouldBeCounted := false ] ifFalse: [ char = 10 ifTrue: [ lfShouldBeCounted ifTrue: [ count := count + 1. remaining := 0 ] ifFalse: [ lfShouldBeCounted := true ] ] ifFalse: [ remaining := remaining + 1 ] ] ] With this example I know how many lines where passed between the startPos and the endPos in a stream. I also know how many char there is between the last line return and the endPos. I wanted to know if you had a better way to do that? The way need to be as performant than this snippet. I know some people here can produce a snippet more readable and easier to maintain :) -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

July 13, 2017