May 2018 - Pharo-users - lists.pharo.org

On UDP broadcast

by Hilaire

Hi, I try to figure out this matter. I am just new to this domain so excuse me for the obvious the errors. To broadcast an IP, this seems to work: | socket | socket := Socket newUDP. socket setOption: 'SO_BROADCAST' value: true. 10 timesRepeat: [ Â Â Â socket sendUDPData: '10.7.2.1'Â toHost: #[255 255 255 255] port: 9999. Â Â Â (Delay forSeconds: 1) wait. Â Â Â Â ]. socket closeAndDestroy. Then I can listen from the shell: with: nc -ulk 9999 Now for the listener part, I wrote something like: | socket data | socket := Socket newUDP. socket connectTo: NetNameResolver loopBackAddress port: 9999. socket waitForConnectionFor: 2. [data := socket receiveDataTimeout: 5. data crLog] ensure: [ socket closeAndDestroy] But I got an error when connecting the socket, the debugger message is: "InvalidSocketStatusException: Socket status must Unconnected before opening a new connection" So far I don't see understand this error. Port 9999 is not in use, and running again after this error the broadcast code does not lead to an error. Any idea? Thanks Hilaire -- Dr. Geo http://drgeo.eu

May 20, 2018

Re: [Pharo-users] [Ann] OSSubprocess 1.0.0

by Guillermo Polito

Hi Sean On Fri, May 18, 2018 at 9:49 PM, Sean P. DeNigris <sean(a)clipperadams.com> wrote: > Guillermo Polito wrote > > If you have any issuesâ¦ > > IMHO the biggest issue is incompatibility with OSProcess. This seems not to > matter when one is loading Project A depending on OSSP in a clean image, > but > the second one tries to load Project A into an image where Project B > already > depends on OSP - KABOOM! Game over. > Well, I cannot say much about why this happens. I've seen it happening, but I try not to depend on projects using OSProcess in that case. Can we also say the same the other way around? If we have OSSubprocess loaded and I download a project using OSProcess, does it break the same? I understand that the incompatibilities bother, but putting all the fault in OSSubprocess and not in OSProcess seems not fair :). Maybe both should be modified to be compatible? Dunno... > On a more philosophical note, I never understood why OSSP was created in > the > first place since we have OSP; I cannot answer this, I'll let Mariano or somebody from the Pharo board on this one. > and especially why the API is different, > making switching more difficult. I found OSProcess API particularly bad. It's never clear to me whether to use OSProcess, PipeableSomething or CommandWhatever (I don't even remember the names of the things that **do work** and I have to look them every time). To be fair, to me even sometimes OSProcess is too verbose. Most people only want to do output := OSProcess executeCommand: 'ls'. Blocking. Recovering stdout. And that's all. So in that sense, I think that letting us move on and rethink the API is not bad at all... Then, we can think on providing some compatibility layer to help people in migrating. So, if anyone want to take action on this point... I'm sure there was a good reason to do > OSSP, but it might be helpful to clarify in the docs (so tradeoffs between > OSP and OSSP can be understood by prospective users). > Well from a technical point of view, if you want to choose from one or another today I'd say: - OSSP is written mostly in FFI, what means that it is easier to modify and ship. - I'm sure OSSP works: it has way more tests and we are using it for several projects ourselves. (Please notice I do not say that OSP does not work, I say I have no way to be sure that it works because tests do not run). So we are eating our own food: - we use them to run iceberg tests - pillar is using it to compile pdfs I've put myself quite some effort to have a working CI, with stress tests, 64bits. I've just tried to run OSP tests and they do not even run in Pharo because they use FileDirectory (and even latest version is updated to work on Cuis)... Having a compatibility layer to make such a project run on squeak, cuis and Pharo looks like a gigantic task for a project that seems so core to me. > > > > ----- > Cheers, > Sean > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

May 20, 2018

Re: [Pharo-users] [Pharo-dev] LibFFI/NB Cairo External Module Not Found debugging

by Ben Coman

I've not used this, just found it poking around... https://blogs.msdn.microsoft.com/junfeng/2006/11/20/debugging-loadlibrary-f… cheers -ben On 19 May 2018 at 19:37, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > Hi, > > some Windows users are repeatedly running into Pharo failing to load Cairo > library on Windows (see stack screenshot at the bottom). > > The problem is that I have no idea how to even start debugging this. > > Is there some documentation on how Pharo loads libraries via FFI on > Windows that I can start digging into? > > Note that the library is definitely present, as this happens only > occasionally -- it can be fixed by restarting PC. But I cannot reasonably > ask users to restart just because Pharo decided it doesn't feel like > loading a library. > > Any pointers / docs / ideas appreciated. > > Thanks, > Peter > > > >

May 20, 2018

LibFFI/NB Cairo External Module Not Found debugging

by Peter UhnÃ¡k

Hi, some Windows users are repeatedly running into Pharo failing to load Cairo library on Windows (see stack screenshot at the bottom). The problem is that I have no idea how to even start debugging this. Is there some documentation on how Pharo loads libraries via FFI on Windows that I can start digging into? Note that the library is definitely present, as this happens only occasionally -- it can be fixed by restarting PC. But I cannot reasonably ask users to restart just because Pharo decided it doesn't feel like loading a library. Any pointers / docs / ideas appreciated. Thanks, Peter

May 19, 2018

Re: [Pharo-users] [Errors] email on error?

by Peter UhnÃ¡k

On Fri, May 18, 2018 at 9:12 PM, Tim Mackinnon <tim(a)testit.works> wrote: Equally you could perhaps trap something in Pharo and write out a fuel file > to an s3 bucket - with s3 you can then trigger an event and they have tools > you can use to alert and or email I do this too -- fuel is really simple to use, and S3 can be as simple as a single PUT request (unless you want some constraints like content type and size limiting). I use combination of Sentry + S3: sentry contains the stack and bunch of other metadata, and I save fuel files to S3 named accordingly to the same sentry event... that way there's no mess in files. For self-setup, you can copy how ShoreLine operates to see how to hook it up to Pharo (some other tips are here http://forum.world.st/global-exception-handler-mechanism-td5065563.html#a50… , but I didn't yet have time to properly investigate them ) Peter

May 18, 2018

Re: [Pharo-users] How to LAN feature

by Hilaire

Oh, forget about my request, I miss some of the important comments in your package. I should have enought to play with it. Le 18/05/2018 Ã 11:33, Hilaire a Ã©critÂ : > > As I have very limited knowledge on network stuff, to get started, do > you have simple example code to show how to use your package? -- Dr. Geo http://drgeo.eu

May 18, 2018

Re: [Pharo-users] [Ann] OSSubprocess 1.0.0

by Sean P. DeNigris

Guillermo Polito wrote > If you have any issuesâ¦ IMHO the biggest issue is incompatibility with OSProcess. This seems not to matter when one is loading Project A depending on OSSP in a clean image, but the second one tries to load Project A into an image where Project B already depends on OSP - KABOOM! Game over. On a more philosophical note, I never understood why OSSP was created in the first place since we have OSP; and especially why the API is different, making switching more difficult. I'm sure there was a good reason to do OSSP, but it might be helpful to clarify in the docs (so tradeoffs between OSP and OSSP can be understood by prospective users). ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 18, 2018

Re: [Pharo-users] [Errors] email on error?

by Tim Mackinnon

Rather than email you could possibly hook in something like datadog or Pingdom if you expose some metric - to get a timely alert. Equally you could perhaps trap something in Pharo and write out a fuel file to an s3 bucket - with s3 you can then trigger an event and they have tools you can use to alert and or email (Ive not tried this - other than write to an s3 bucket - but I saw an AWS presentation on all there cloud tools and it looked straight forward) . Tim Sent from my iPhone > On 18 May 2018, at 18:33, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > Hi Sergio, > > I highly recommend using a more sophisticated solution such as Sentry ( https://github.com/peteruhnak/pharo-sentry , https://peteruhnak.github.io/pharo-sentry/ ). > > If you want something really simple, then ShoreLine can be of assistance (assuming you use Pharo 6; it was removed in P7) > You can enable automatic reporting in settings, and if you want to send email instead of a API request, then look at (and change) SlReporter>>send: > > But I have to strongly discourage you from using simple stack traces in mail... it is a nightmare to manage; especially if you have multiple servers/versions/errors occur in a loop, etc. > (I've tried using SL for about 2 months, and I've failed miserably. That's why I wrote pharo-sentry). > > Peter > >> On Fri, May 18, 2018 at 5:51 PM, sergio ruiz <sergio.rrd(a)gmail.com> wrote: >> Is there a way to send an email on an error or exception? >> >> I have an app that runs live on a remote server, and I am finding that every now and then, the server will lock up, and I wonât know whatâs going on with it. >> >> Currently, i pull the image and run it local, but an email with a stack trace would be SUPER helpful. >> >> Thanks! >> >> >> >> ---- >> peace, >> sergio >> photographer, journalist, visionary >> >> Public Key: http://bit.ly/29z9fG0 >> #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV >> http://www.codeandmusic.com >> http://www.twitter.com/sergio_101 >> http://www.facebook.com/sergio101 >

May 18, 2018

UK Smalltalk User Group meeting - Monday May 21st

by Giovanni Corriga

The next meeting of the UK Smalltalk User Group Meeting will be on Monday, 21st May. We'll meet at our now usual venue The City Pride ( http://www.cityprideclerkenwell.co.uk/ ) at 7pm. For this monthâs meeting, weâll do a session of bug hunting: fix a few things in our favourite Smalltalk frameworks and tools. If you'd like to join us, you can just show up at the pub. You can also sign up in advance at the meeting's Meetup page: http://www.uksmalltalk.org/2018/05/bug-hunting-monday-may-25th.html . See you there!

May 18, 2018

Re: [Pharo-users] [Errors] email on error?

by Peter UhnÃ¡k

Hi Sergio, I highly recommend using a more sophisticated solution such as Sentry ( https://github.com/peteruhnak/pharo-sentry , https://peteruhnak.github.io/pharo-sentry/ ). If you want something really simple, then ShoreLine can be of assistance (assuming you use Pharo 6; it was removed in P7) You can enable automatic reporting in settings, and if you want to send email instead of a API request, then look at (and change) SlReporter>>send: But I have to strongly discourage you from using simple stack traces in mail... it is a nightmare to manage; especially if you have multiple servers/versions/errors occur in a loop, etc. (I've tried using SL for about 2 months, and I've failed miserably. That's why I wrote pharo-sentry). Peter On Fri, May 18, 2018 at 5:51 PM, sergio ruiz <sergio.rrd(a)gmail.com> wrote: > Is there a way to send an email on an error or exception? > > I have an app that runs live on a remote server, and I am finding that > every now and then, the server will lock up, and I wonât know whatâs going > on with it. > > Currently, i pull the image and run it local, but an email with a stack > trace would be SUPER helpful. > > Thanks! > > > > ---- > peace, > sergio > photographer, journalist, visionary > > Public Key: http://bit.ly/29z9fG0 > #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV > http://www.codeandmusic.com > http://www.twitter.com/sergio_101 > http://www.facebook.com/sergio101 >

May 18, 2018