February 2022 - Pharo-dev - lists.pharo.org

Sockets not working under heavy VM load?
by Pavel Krivanek Oct. 3, 2023

Oct. 3, 2023

Hi, we have some performance issues with Glorp over P3 and, after some investigation, I have a theory that could explain it. And I would like to know your opinion if it is correct. To reproduce this issue, you can try something easy. Just create a process with normal or higher priority that will try to read something from a socket. And, in parallel, do in a separate thread an operation that takes all the processor time for several seconds. ```` [ 5 seconds wait. Time now traceCr. ZnClient new url: 'https://www.google.com'; get. Time now traceCr. ] forkAt: 60. [1000 timesRepeat: [ 10000 factorial ] ] timeToRun ```` (you may try a different safe server address) The processes run in parallel until the time when the first process tries to obtain data from the socket. Then it hangs and waits until finishing of the second process. My theory is that the VM socket plugin is able to receive incoming data from the connection and save it into the buffer. In the meantime, the reading process is waiting on the socket semaphore. But it looks like the plugin is not able to release the semaphore while the VM is actually doing something. It needs to wait until the VM has nothing useful to do, and then it is finally able to release the semaphores so Pharo processes are resumed and can start to read. Is my theory right? Cheers, -- Pavel

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Recommendation for password encryption?
by Mariano Martinez Peck Sept. 30, 2022

Sept. 30, 2022

Hi guys. Some time ago I asked about the best way to encrypt a password. Some of the recommendations I got was: 1) Generally for passwords you do not write a decrypt method for security purposes (eg you do not want people to be able to reverse engineer the encrypted password easily) 2) put a little salt 3) There is http://www.squeaksource.com/Cryptography/PasswordHashingFFI 4) I should not decrypt password but instead I should compare both encrypted versions to see if they are equal. My scenario is the following. I need to store database passwords in text files. So I don't want to let them as plain text. And while I understand 4), I think it's a different scenario than mine. I know that some database driver may allow you to directly send the encrypted password. But still...I have another similar scenario in which I have to store a password and then send it (unencrypted)...so I kind of really need a bi-directional encryption. Now..I would try to avoid having an external library + FFI. Any ideas what is the best thing I can do? And how could I solve 1) if I want bidirectional like in my case? Thanks in advance, -- Mariano http://marianopeck.wordpress.com

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ESUG 2022 call for presentations & Call for student volunteers
by stephane ducasse April 23, 2022

April 23, 2022

ESUG 2022 Novisad Serbia 22. â 26.8. https://esug.github.io/2022-Conference/call2022.html You can support the ESUG conference in many different ways: Sponsor the conference. New sponsoring packages are described at http://www.esug.org/supportesug/becomeasponsor/ <http://www.esug.org/supportesug/becomeasponsor/> Submit a talk, a software or a paper to one of the events. See below. Attend the conference. We'd like to beat the previous record of attendance (170 people at Amsterdam 2008)! Students can get free registration and hosting if they enroll into the the Student Volunteers program. See below. <>Developers Forum: International Smalltalk Developers Conference We are looking for YOUR experience on using Smalltalk. You will have 30 min for presentations and 45 min for hands-on tutorials. The list of topics for the normal talks and tutorials includes, but is not limited to the following: XP practices, Development tools, Experience reports Model driven development, Web development, Team management Meta-Modeling, Security, New libraries & frameworks Educational material, Embedded systems and robotics SOA and Web services, Interaction with other programming languages <>Teaching Pearls and Show us Your Business New this year!!! We added two types of sessions in addition to the regular talks and show us your projects sessions. Show your business 10 min session (Get prepared!!) Teaching pearls : we want some session on how to teach some design aspects. We want your tip and tricks to teach Smalltalk or OOP. We expect to have several 10 to 15 min sessions aggregated. <>How to submit? Make a Pull Request here https://github.com/ESUG/esug.github.io/tree/source/2022-Conference/talks Or but only if you are not connected to the worldâ¦ send an email to stephane.ducasse(a)inria.fr Title: [ESUG 2022] Please follow the template below the email will be automatically processed! Name: Email: Abstract: Bio: Call for Student Volunteers Student volunteers help keep the conference running smoothly; in return, they have free accommodations, while still having most of the time to enjoy the conference. Pay attention: the places are limited so do not wait till the last minute to apply. Conference details: Send an email to stephane.ducasse at inria.fr and serge.stinckwich at gmail.com with: title: [ESUG 2022 Student] name, gender, university/school, country, email address short description of you and why you are interested in participating For which period is accommodation covered? Accommodation is covered from Sunday 21 August until Friday 26 August 2022 (including nights from Sunday to Monday and from Thursday to Friday). Students will be hosted in student rooms. ESUG additionally covers for the lunches during the week and one dinner. Duties include handling registration as people arrive at the conference, filling coffee machines, collecting presentation slides for ESUG right after the presentation is given, being present at an information desk to answer questions, and generally being helpful. Student volunteering makes the conference better, takes a fairly small amount of time and doesn't significantly interfere with enjoying and learning from the conference. Please Note, this role requires discipline and constant attention to all attendees. Information about hotel Student Volunteer rooms are booked at (to be announced). If you are student volunteer, do not book yourself, we have arranged the booking already!

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Fwd: ESUG 2022 call for presentations And Call for student volunteers
by stephane ducasse March 10, 2022

March 10, 2022

A reminderâ¦ S > Begin forwarded message: > > From: "stephane.ducasse(a)free.fr" <stephane.ducasse(a)free.fr> > Subject: ESUG 2022 call for presentations And Call for student volunteers > Date: 13 January 2022 at 13:23:44 CET > > ESUG 2022 > Serbia 22. â 26.8. > > You can support the ESUG conference in many different ways: > Sponsor the conference. New sponsoring packages are described at http://www.esug.org/supportesug/becomeasponsor/ <http://www.esug.org/supportesug/becomeasponsor/> > Submit a talk, a software or a paper to one of the events. See below. > Attend the conference. We'd like to beat the previous record of attendance (170 people at Amsterdam 2008)! > Students can get free registration and hosting if they enroll into the the Student Volunteers program. See below. > <>Developers Forum: International Smalltalk Developers Conference > > We are looking for YOUR experience on using Smalltalk. You will have 30 min for presentations and 45 min for hands-on tutorials. > The list of topics for the normal talks and tutorials includes, but is not limited to the following: > XP practices, Development tools, Experience reports > Model driven development, Web development, Team management > Meta-Modeling, Security, New libraries & frameworks > Educational material, Embedded systems and robotics > SOA and Web services, Interaction with other programming languages > <>Teaching Pearls and Show us Your Business > > New this year!!! We added two types of sessions in addition to the regular talks and show us your projects sessions. > Show your business 10 min session (Get prepared!!) > Teaching pearls : we want some session on how to teach some design aspects. We want your tip and tricks to teach Smalltalk or OOP. > We expect to have several 10 to 15 min sessions aggregated. > <>How to submit? > > Make a Pull Request here https://github.com/ESUG/esug.github.io/tree/source/2022-Conference/talks > > Or but only if you are not connected to the worldâ¦ send an email to stephane.ducasse(a)inria.fr > > Title: [ESUG 2022] Please follow the template below the email will be automatically processed! > Name: > Email: > Abstract: > Bio: > > Call for Student Volunteers > Student volunteers help keep the conference running smoothly; in return, they have free accommodations, while still having most of the time to enjoy the conference. > > Pay attention: the places are limited so do not wait till the last minute to apply. > > Conference details: > Send an email to stephane.ducasse at inria.fr and serge.stinckwich at gmail.com with: > > title: [ESUG 2022 Student] > name, gender, university/school, country, email address > short description of you and why you are interested in participating > For which period is accommodation covered? Accommodation is covered from Sunday 21 August until Friday 26 August 2022 (including nights from Sunday to Monday and from Thursday to Friday). Students will be hosted in student rooms. ESUG additionally covers for the lunches during the week and one dinner. > > Duties include handling registration as people arrive at the conference, filling coffee machines, collecting presentation slides for ESUG right after the presentation is given, being present at an information desk to answer questions, and generally being helpful. Student volunteering makes the conference better, takes a fairly small amount of time and doesn't significantly interfere with enjoying and learning from the conference. Please Note, this role requires discipline and constant attention to all attendees. > > Information about hotel > Student Volunteer rooms are booked at (to be announced). If you are student volunteer, do not book yourself, we have arranged the booking already! >

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Migration of ReferenceFinder
by pmissech March 1, 2022

March 1, 2022

Hello, I've migrated the small repository of Reference Finder to github: https://github.com/hogoww/ReferenceFinder/ from Smalltalk-hub. If someone is aware of another migration of the repository, licensing or others, please let me know. Pierre

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[ANN] Fuel 5.0.0
by Max Leske March 1, 2022

March 1, 2022

Hi everyone, I'm happy to announce Fuel version 5.0.0 today. The changes to 4.0.0 aren't huge but I've had to adjust the format once more. 5.0.0 comes with full support for stateful traits, i.e. traits with instance variables. You can find the release notes here: https://theseion.github.io/Fuel/releases/5.0.0/. Cheers, Max (on behalf of the Fuel team)

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[ANN] Pharo Oracle Call Interface
by Sven Van Caekenberghe Feb. 27, 2022

Feb. 27, 2022

Hi, Pharo Oracle Call Interface (https://github.com/Ironirc/Pharo-Oracle-Call-Interface) is a new project that is currently under development. It was started and implemented by Ivo Roefs. This library allows you to connect to an Oracle SQL RDBMS from Pharo (versions 8 and up). It provides a binding with Oracle's OCI (also known as the Oracle Call Interface) using FFI. Usage Once correctly installed on your local computer, you use OciClient to interact with the Oracle database: | client rows | client := OciClient new environmentString: 'pharotst202112_medium'; username: 'SCOTT'; password: 'TIGER'; yourself. rows := client query: 'SELECT * FROM emp'. client close. rows. Installation To install this library you clone the repository and load BaselineOfPharoOracleCallInterface. This can be done using the Iceberg UI tools or with the following script: Metacello new baseline: 'PharoOracleCallInterface'; repository: 'github://Ironirc/Pharo-Oracle-Call-Interface:main/'; load. You have to make sure that the Pharo VM can access/load the necessary native library for your client side OS platform. The easiest way to get started is using Oracle Instant Client and an Oracle Cloud account. You also have to set up and configure access, contact your DBA for help. Status This project is new and currently under development. It should not be used for production applications. Basic queries are working on 32 and 64 bit Windows and 64 bit macOS. We are looking for collaborators, fellow developers who can help. Ivo & Sven

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Talents - VM Crash on P9 after Fuel Materialization
by sean＠clipperadams.com Feb. 26, 2022

Feb. 26, 2022

After serializing and then materializing an object with a talent, the trait's instVar seems to have disappeared from the inspector, although the print string looks like that of a Talented object. If you send a getter for a talented ivar, Pharo crashes. Not sure if this is a Talents problem or a Fuel problem (or both). More details and reproducible steps here: [https://github.com/tesonep/pharo-talents/issues/11]( https://github.com/tesonep/pharo-talents/issues/11 " https://github.com/tesonep/pharo-talents/issues/11") Anyone have some insight?\ \ I reported on Jan 7, but maybe more eyeballs here. Iâve been eager to give Talents a real try, but use Fuel extensively, so this is a blocking issue for me.

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PTerm - Can't Find FFI Library on M1 Mac on P9
by sean＠clipperadams.com Feb. 26, 2022

Feb. 26, 2022

The really cool PTerm in-image terminal emulator works for me in P8 but not on P9. I recently upgraded to an M1 Mac, so Iâm trying to isolate whether ARM is the cause of the problem. Can someone try to reproduce the issue described here: [https://github.com/lxsang/PTerm/issues/20](https://github.com/lxsang/PTerm/… "https://github.com/lxsang/PTerm/issues/20") TIA, s

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Problem with Pharo 10 in GitHub Action CI using SmalltalkCI
by Sven Van Caekenberghe Feb. 22, 2022

Feb. 22, 2022

Hi, I just tried to enable Pharo64-10 (not Pharo64-10.0 but that is probably another issue) in a GitHub Action CI using SmalltalkCI. https://github.com/svenvc/ston/blob/master/.github/workflows/CI.yml https://github.com/svenvc/ston/runs/5286121566?check_suite_focus=true This fails with NotFound: [ :cl | cl isPlatformCompatible ] not found in OrderedCollection OrderedCollection(Collection)>>errorNotFound: [self errorNotFound: aBlock] in OrderedCollection(Collection)>>detect: in Block: [self errorNotFound: aBlock] OrderedCollection(Collection)>>detect:ifFound:ifNone: OrderedCollection(Collection)>>detect:ifNone: OrderedCollection(Collection)>>detect: SmalltalkCI class>>platformClass ... Does anyone have any idea ? I seem to remember there were some issue with Metacello attributes, but maybe that is not related. Sven PS: I could try with other repositories but that will probably give the same result. Only Zinc does run with Pharo 10, last build a day ago. I can't spot the difference.

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