October 2014 - Pharo-users - lists.pharo.org

Starting a pool of worker images using command line parameters

by Esteban A. Maringolo

tl;dr version: I'd like to be able to do something like $PATH/app/pharo-vm/pharo --nodisplay app.image st setup-worker.st --port 8091 and: $PATH/app/pharo-vm/pharo --nodisplay app.image st setup-worker.st --port 8092 etc. Do I have to define a subclass of STCommandLineHandler? How can I capture the --port argument? For what I saw, only "boolean" parameters can be defined (--quit, --save, etc, without arguments). It is, no getopts compatibility. Long version: For my apps I have a pool of worker images with Zinc+Seaside behind an nginx proxy. Each "upstream" (aka "worker") server, is started by supervisord, using a separate startup smalltalk script, where the only thing I change is the port of ZnZincServerAdaptor to start on a different port. The rest is identical. The startup is something like: $PATH/app/pharo-vm/pharo --nodisplay app.image st setup-worker1.st and for worker2: $PATH/app/pharo-vm/pharo --nodisplay app.image st setup-worker2.st and for worker3: $PATH/app/pharo-vm/pharo --nodisplay app.image st setup-worker3.st etc. Is there a better way to perform this without having to copy setup-worker1.st to setup-workerN.st for each worker image? How do you manage this? Regards, Esteban A. Maringolo

Oct. 23, 2014

Re: [Pharo-users] Thanks.

by kilon alios

I assume here you mean that Smalltalk emphasises on the existence of the IDE and the close integration of the IDE with the language. I will say yes you are correct. In other languages the IDE is simply not there, so the language cannot rely on it the same way Smalltalk relies on its own IDE. But then it also depends. Smalltalk and Pharo are dynamic languages but so are Python , Ruby, Javascript and much more. Even static type languages have integrated some type of dynamism. So the differnces are not as massive as you may assume. For example Ruby is actually very close to Smalltalk. So language wise Smalltalk does not really offer anything out of the ordinary. But yes the close integration with the IDE and live coding itself set Pharo and Smalltalk apart from all other languages. Now if you imply that you need to understand many methods in Pharo because the methods are small, generally that is not the case. As a matter of fact Pharo is quite small system, Python, Java , Ruby , Javascript they come with tons more libraries and code. But you dont need to understand all these things. You learn as much you need to move to the next step, as much you need to write the next line of code. At least that is how I work. So dont try to figure out Pharo structure just yet, start with very small tasks, very simple problems , concetrate only on one line of code and then go back to learning as much you need to code the next line and continue in this loop. Dont waste your time with reading chapters or prining out code and tying to understand diagrams and complex structures. Trust me its a waste of time, because in a month you will forget all that. This is not how our brain works. The brain wants small chunks, small things to learn, one step of time and always code. Dont stop coding. Practice is everything. So yes dont care about learning many functions, stick to only a few of them, do small tasks and you will be fine. Pharo is easy to learn anyway. On Thu, Oct 23, 2014 at 8:18 PM, Hans Schueren <werbung(a)hans-schueren.de> wrote: > Thank you Kion Alios ! > > As a beginner of smalltalk i have realized two things. > > 1. The main view in smalltalk language is on the " Programming System" ( > functions of the Pharo system at all ) > > You could say : " Open the IDE - check the functions for many days : > then start to write Objects with minimal code" > > > > 2. In other languages the main view is on the "Syntax and code structure > only" ( the systems IDE is minimal styled ) > > You could say : " Open the IDE - check the function for one day : and > start to write code for many days " > > > > > My next aim is to write a simple program from a practical task. a storage > program for items > > The only information are " what the worker in the company would do with > the items ". > > > Therfore i try to make a FLOW CHART with an additional software tool to > see the whole Tasks in one view. > > Then i add the Object names and class names that are corresponding to that > tasks ( same name as real ). > > I would see in practice if this flow chart is a good method for overview. > ( Brainstorming - Flowchart ). > > > > > I dont care of the many functions of the system at this beginning point. > > Just make ONE simple program , and compile it to an .exe to check on > another PC. > > > > Regards > > Hans > > > > > > > > > > > > > > > > > > > > > >

Oct. 23, 2014

Thanks.

by Hans Schueren

Thank you Kion Alios ! As a beginner of smalltalk i have realized two things. 1. The main view in smalltalk language is on the " Programming System" ( functions of the Pharo system at all ) You could say : " Open the IDE - check the functions for many days : then start to write Objects with minimal code" 2. In other languages the main view is on the "Syntax and code structure only" ( the systems IDE is minimal styled ) You could say : " Open the IDE - check the function for one day : and start to write code for many days " My next aim is to write a simple program from a practical task. a storage program for items The only information are " what the worker in the company would do with the items ". Therfore i try to make a FLOW CHART with an additional software tool to see the whole Tasks in one view. Then i add the Object names and class names that are corresponding to that tasks ( same name as real ). I would see in practice if this flow chart is a good method for overview. ( Brainstorming - Flowchart ). I dont care of the many functions of the system at this beginning point. Just make ONE simple program , and compile it to an .exe to check on another PC. Regards Hans

Oct. 23, 2014

Re: [Pharo-users] [squeak-dev] Using libraries in FFI

by Eliot Miranda

Hi Wolfgang, On Thu, Oct 23, 2014 at 8:59 AM, Wolfgang Eder <edw(a)generalmagic.at> wrote: > hi, > shouldnât there be quotes here like such: > > LD_LIBRARY_PATH="$PLUGINS:$SVMLLP:${LD_LIBRARY_PATH}" exec "$BIN/squeak" > "$@â > yes, thanks! > > cheers wolfgang > > Am 23.10.2014 um 17:49 schrieb Eliot Miranda <eliot.miranda(a)gmail.com>: > > LD_LIBRARY_PATH=$PLUGINS:$SVMLLP:${LD_LIBRARY_PATH} exec "$BIN/squeak" "$@" > > > > > > > -- best, Eliot

Oct. 23, 2014

Re: [Pharo-users] [squeak-dev] Using libraries in FFI

by Eliot Miranda

On Thu, Oct 23, 2014 at 8:46 AM, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > Hi Annick, > > On Wed, Oct 22, 2014 at 5:45 AM, Annick Fron <list(a)afceurope.com> wrote: > >> Hi Eliot, >> >> My problem is not with the VM, my problem is with my own library >> that I connect to through FFI. >> I know where the libraries are ! >> >> I have tried to add them in /etc/ld.so.conf.d , that does not work. >> I have tried export LD_LIBRARY_PATH, but somehow it erases some libraries >> needed by pharo. >> > > But if you use the script I include with my VMs it won't erase. It > extends LD_LIBRARY_PATH. Find an example attached. > Here's the operative line (the last one). PLUGINS is the directory containing VM plugins, SVMLLP is "Smalltalk VM LD_LIBRARY_PATH" and specifies the directories containing the C libraries the VM depends on (C library, libuuid, etc). LD_LIBRARY_PATH=$PLUGINS:$SVMLLP:${LD_LIBRARY_PATH} exec "$BIN/squeak" "$@" > > > >> I have done sudo ldconfig ... >> >> In fact I have one library that depends from another one. >> In FFI I call one method which calls another method in the other library. >> I have tried to create symbolics links in the directory â¦ >> I have checked that nm gives the right symbol with the right type .. >> >> So I have no idea what to try now ! >> >> Annick >> >> Le 22 oct. 2014 Ã 12:46, Eliot Miranda <eliot.miranda(a)gmail.com> a Ã©crit >> : >> >> > Hi Annick, >> > >> > LD_LIBRARY_PATH should be set to point to the relevant directories, >> but this can be tricky as there is a lot if variation across Linux distros >> as to where libraries are kept. The squeak script that comes with the Cog >> VMs extends LD_LIBRARY_PATH, so if you know where your libraries are you >> can use the script to find the other libraries the VM needs (c library and >> plugins). >> > >> > Eliot (phone) >> > >> > On Oct 22, 2014, at 2:55 AM, Annick Fron <list(a)afceurope.com> wrote: >> > >> >> Hi, >> >> >> >> I am using a module in FFI which depends on a large library letâs say >> 10 dynamic .so files in a directory. >> >> How is it possible to use this library without making all symbolic >> links ? >> >> >> >> Annick >> > >> >> >> > > > -- > best, > Eliot > -- best, Eliot

Oct. 23, 2014

Re: [Pharo-users] [squeak-dev] Using libraries in FFI

by Eliot Miranda

Hi Annick, On Wed, Oct 22, 2014 at 5:45 AM, Annick Fron <list(a)afceurope.com> wrote: > Hi Eliot, > > My problem is not with the VM, my problem is with my own library > that I connect to through FFI. > I know where the libraries are ! > > I have tried to add them in /etc/ld.so.conf.d , that does not work. > I have tried export LD_LIBRARY_PATH, but somehow it erases some libraries > needed by pharo. > But if you use the script I include with my VMs it won't erase. It extends LD_LIBRARY_PATH. Find an example attached. > I have done sudo ldconfig ... > > In fact I have one library that depends from another one. > In FFI I call one method which calls another method in the other library. > I have tried to create symbolics links in the directory â¦ > I have checked that nm gives the right symbol with the right type .. > > So I have no idea what to try now ! > > Annick > > Le 22 oct. 2014 Ã 12:46, Eliot Miranda <eliot.miranda(a)gmail.com> a Ã©crit : > > > Hi Annick, > > > > LD_LIBRARY_PATH should be set to point to the relevant directories, > but this can be tricky as there is a lot if variation across Linux distros > as to where libraries are kept. The squeak script that comes with the Cog > VMs extends LD_LIBRARY_PATH, so if you know where your libraries are you > can use the script to find the other libraries the VM needs (c library and > plugins). > > > > Eliot (phone) > > > > On Oct 22, 2014, at 2:55 AM, Annick Fron <list(a)afceurope.com> wrote: > > > >> Hi, > >> > >> I am using a module in FFI which depends on a large library letâs say > 10 dynamic .so files in a directory. > >> How is it possible to use this library without making all symbolic > links ? > >> > >> Annick > > > > > -- best, Eliot

Oct. 23, 2014

Re: [Pharo-users] Athens do not work on Image 40316+

by Alexandre Bergel

Hi Jan! I can have a look next beginning of next week (not earlier sorry). In the meantime, you can use the Moose image. It is pretty stable. Cheers, Alexandre > Le 23-10-2014 Ã 3:50, Jan BlizniÄenko <bliznjan(a)fit.cvut.cz> a Ã©crit : > > Nicolai Hess wrote >> I think you can skip the first part: "ConfigurationOfAthens loadVersion: >> '2.0'." >> because Athens is already in the image and the version on smalltalkhub is >> not >> uptodate with the one in the image. > > I've never did the step one because of that reason. > Just as I said, to reproduce just download clean image, run Gofer it package > Athens-Tutorial, run AthensTutorial new openWithSpec, press "next" arrow, > press "do it", that's all. Then this error appears. Or you can download > Roassal 2 and open Roassal examples, same error. Or our project based on > Roassal. > On linux there is a little different error, but both are somehow similar > (something about nativeboost, athens, cairo, etc.) > > > > -- > View this message in context: http://forum.world.st/Athens-do-not-work-on-Image-40316-tp4786099p4786136.h… > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >

Oct. 23, 2014

Re: [Pharo-users] Athens do not work on Image 40316+

by Jan B.

Nicolai Hess wrote > Never give up! > > Be sure you have a valid PharoV30.sources file. Of course, sources file! It worked perfectly without it for few months (since I started using Pharo 4), so I completely forgot it even exists. You solved my problem, thanks a lot! Jan -- View this message in context: http://forum.world.st/Athens-do-not-work-on-Image-40316-tp4786099p4786192.h… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Oct. 23, 2014

Re: [Pharo-users] move a method

by [CH] Aliaksei Syrel

Hi, Does drag and drop not work for you? That's how I usually move methods between classes if I need to. Just press on the method name in the list and drag it to another class. (Works in Moose, should also work in Pharo). Cheers, Alex On Oct 23, 2014 11:45 AM, "Hans Schueren" <werbung(a)hans-schueren.de> wrote: > Good morning fellows , > > i want to move a method in a different class. > > Therefore i can see two options in the Package Browser. (context menue of > method) > > 1. move to trait (e) > > 2. move to package. > > > The option one is ok. But i only can see there the message : "New Trait" > > No existing classes and protocolls to choose. > > > Normally i klick MOVE and then i type the location in with > Classname>Protokollname > > Want to move it to an existing protocol from a class. > > > How can i do that. > > > Thanks. > > > Hans > >

Oct. 23, 2014

Re: [Pharo-users] move a method

by kilon alios

I see no move to trait, I am assuming you talk about system browser , system browser has no means to move methods. At least not in menus. Move to package is for the class. I usually just copy paste the method and then remove it from the original. Of course if you want to move more than one then it would be better to just subclass the class. I dont like the menus of System Browser they are not context sensitive. We need to fix this at some point. Trait is basically a method that can be shared amongst many classes, so you dont want to mess with traits just yet. On Thu, Oct 23, 2014 at 12:45 PM, Hans Schueren <werbung(a)hans-schueren.de> wrote: > Good morning fellows , > > i want to move a method in a different class. > > Therefore i can see two options in the Package Browser. (context menue of > method) > > 1. move to trait (e) > > 2. move to package. > > > The option one is ok. But i only can see there the message : "New Trait" > > No existing classes and protocolls to choose. > > > Normally i klick MOVE and then i type the location in with > Classname>Protokollname > > Want to move it to an existing protocol from a class. > > > How can i do that. > > > Thanks. > > > Hans > >

Oct. 23, 2014