July 2021 - Pharo-users - lists.pharo.org

Re: Error in Pharo 9's Spec UI Framework Demo

by Esteban Lorenzano

Hi Tau, The filter that was bundled with the list components is deprecated and should not be used. Instead, we provide another component with that functionality: SpFilteringListPresenter. Take a loot there and its examples. Esteban On Jul 25 2021, at 5:52 am, tau <tau(a)cedalion.info> wrote: > > In the Spec2 examples included with Pharo9, in the example for SpListPresenter, when I try to input text in the list filter, I get an error: the debug window says: "Instance of OrderedCollection did not understand #hasElementAt:". The example works correctly in Pharo8. > > Is there a workaround to make the example work?

July 25, 2021

Error in Pharo 9's Spec UI Framework Demo

by tau

In the Spec2 examples included with Pharo9, in the example for SpListPresenter, when I try to input text in the list filter, I get an error: the debug window says: "Instance of OrderedCollection did not understand #hasElementAt:". The example works correctly in Pharo8. Is there a workaround to make the example work?

July 25, 2021

The Greatest Contributors to Smalltalk since 1980

by horrido.hobbies＠gmail.com

Iâm looking for a list of individuals who have contributed greatly to the advancement of Smalltalk, post Xerox PARC period (1972-1980). By advancement, I donât only mean on a technical basis but on an educational or public awareness basis (this could include books, podcasts, talk circuit, video instruction, etc.). Any basis that has made Smalltalk a success in the marketplace (including commercialization). I posted this question on LinkedIn and got one useful response: the late James Robertson. My personal nomination is Kent Beck. Iâm not that familiar with the deep history of Smalltalk, so Iâm looking for more nominations. Thanks.

July 24, 2021

Re: How do I remove old classes?

by Clacton Server

Good thinking. I will check that out. Thank you. David > On 23 Jul 2021, at 16:34, Richard Sargent <richard.sargent(a)gemtalksystems.com> wrote: > > > > On Fri, Jul 23, 2021, 06:57 Clacton Server <david(a)totallyobjects.com <mailto:david@totallyobjects.com>> wrote: > I have been having an enduring problem with Pharo "disappearing" on any machine I try it on. In an effort to resolve that it isn't my code, I want to remove the Package that contains all my Seaside code so that I can install a minimal home page under Seaside. This will, at least exonerate my code. However, I have removed the offending package, executed Smalltalk cleanUp: true but I can still get into the old code. A debugger comes up when I try the old code and it shows "AnObsoleteCNWMeetingsGalleries(AnObsoleteCNWBasic)" so the code is still there and all the bots that have the address will still be calling it. How do I finally remove the code? > > I would venture that you previously registered the class as a Seaside handler/application/whatever and the registry holds the class despite it being removed from the Smalltalk global dictionary. > > If so, you would need to remove it from the registry. > > > David Pennington

July 23, 2021

Re: How do I remove old classes?

by Richard Sargent

On Fri, Jul 23, 2021, 06:57 Clacton Server <david(a)totallyobjects.com> wrote: > I have been having an enduring problem with Pharo "disappearing" on any > machine I try it on. In an effort to resolve that it isn't my code, I want > to remove the Package that contains all my Seaside code so that I can > install a minimal home page under Seaside. This will, at least exonerate my > code. However, I have removed the offending package, executed Smalltalk > cleanUp: true but I can still get into the old code. A debugger comes up > when I try the old code and it shows > "AnObsoleteCNWMeetingsGalleries(AnObsoleteCNWBasic)" so the code is still > there and all the bots that have the address will still be calling it. How > do I finally remove the code? > I would venture that you previously registered the class as a Seaside handler/application/whatever and the registry holds the class despite it being removed from the Smalltalk global dictionary. If so, you would need to remove it from the registry. > David Pennington

July 23, 2021

Re: How do I remove old classes?

by Kasper Osterbye

Not knowing your specific usage, this tends to happen if you have an instance of class X, and then remove the class. To save the instance from going stale, Smalltalk has always made an Obsolete class. You can find the offending X instance by inspecting this: ReferenceFinder findAllPathsTo: X allInstances first This examines the first instance, you might want to print X allInstances size to see how big your issue is. Also, perhaps you need to force a garbage collect first: Smalltalk image garbageCollect Tracing the back-references can be a bit overwhelming the first times. For me the culprit has often been some global variable I thought I had under control. Best, Kasper > On 23 Jul 2021, at 15.56, Clacton Server <david(a)totallyobjects.com> wrote: > > I have been having an enduring problem with Pharo "disappearing" on any machine I try it on. In an effort to resolve that it isn't my code, I want to remove the Package that contains all my Seaside code so that I can install a minimal home page under Seaside. This will, at least exonerate my code. However, I have removed the offending package, executed Smalltalk cleanUp: true but I can still get into the old code. A debugger comes up when I try the old code and it shows "AnObsoleteCNWMeetingsGalleries(AnObsoleteCNWBasic)" so the code is still there and all the bots that have the address will still be calling it. How do I finally remove the code? > > David Pennington

July 23, 2021

How do I remove old classes?

by Clacton Server

I have been having an enduring problem with Pharo "disappearing" on any machine I try it on. In an effort to resolve that it isn't my code, I want to remove the Package that contains all my Seaside code so that I can install a minimal home page under Seaside. This will, at least exonerate my code. However, I have removed the offending package, executed Smalltalk cleanUp: true but I can still get into the old code. A debugger comes up when I try the old code and it shows "AnObsoleteCNWMeetingsGalleries(AnObsoleteCNWBasic)" so the code is still there and all the bots that have the address will still be calling it. How do I finally remove the code? David Pennington

July 23, 2021

[ANN] Buoy v6.1.0 [v6.1.0] released!

by Buenos Aires Smalltalk

July 23, 2021

Re: Pharo concurrency: select on socket or file IO

by vinref＠gmail.com

TaskIt is fantastic! I never realised this existed at all. This is exactly what I need. Thanks Pablo

July 22, 2021

Re: ZnServer on a cheap server: your experiences

by Esteban Maringolo

Yeap, not much more to add than what Sven said. What's important to mention is that they are really stable. I've been running Pharo servers in DO droplets of all sizes, without issues (some running for months), I only had to upscale one droplet to more memory, and it was because of a leak I introduced with PGSQL connections, otherwise, they're pretty lightweight for today's standards and a normal workload. I have deployments with nginx and Pharo images as upstreams, and I have one with Docker swarm and Traefik doing the load balancing among different Pharo workers and acting as the HTTPS endpoint. I'm removing this option though and moving back to nginx only. What I never tried was to host a docker container running Pharo, in some Docker hosting. It might be the best option as a quick start, but after doing the math, it's always more expensive than a Droplet. Best regards, Esteban A. Maringolo On Thu, Jul 22, 2021 at 3:21 AM Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > Hi Vince, > > That is certainly possible and works well. I would recommend an instance with 1GB RAM, that leaves you some headroom. > > Deploying web applications is of course a broad subject, much of the required knowledge is not Pharo specific, but needed anyway. > > The last chapter in the Pharo Enterprise book (https://books.pharo.org/enterprise-pharo/) is a good starting point (Deployment). But there are other and different approaches. > > A plain HTTP demo instance running on a DO instance can be found here: http://zn.stfx.eu/welcome > > For production use you should front with NGINX or something similar to add HTTPS. > > May people on this mailing list deploy Pharo server applications, we have tens of them in day to day production doing real work. > > Good luck on your journey, you know where to ask questions. > > Regards, > > Sven > > > On 22 Jul 2021, at 07:56, vinref(a)gmail.com wrote: > > > > Anyone here run a web app using plain ZnServer (or subclasses) on a cheap VPS (i.e., $10/month DO droplet or equivalent). What are your experiences?, suggestions. > > > > I am planning a web app with just plain ZnServer, SQLite3, ATS or equivalent. > > > > Thanks, Vince > >

July 22, 2021