ITDevCon 2017 Spring Edition

Yes, we did it!

As we anticipated at the last ITDevCon in Rome (oct 2016) in 2017 we organized another appointment with ITDevCon, called Spring Edition. The Spring Edition is shorter than the classic edition and it is only in italian language, but offers the usual high-level contents that the ITDevCon brand usually does.

Many users recognize ITDevCon as a “different” conference – it is more business oriented, more practical and more authoritative than many other conferences out there. We are glad of these opinions and we’ll do our best to mantain this situation. So, this year we want to test a different format and timing. To keep things simple, we organized the spring edition only in italian language (that’s it, all the speeches are in italian). Don’t be afraid, the standard ITDevCon conference will remain of 2 days in october/november timeframe and with the usual format and languages!

In this spring edition I’ll talk about the following topics (in italian):

 

I miei speech per ITDevCon 2017 Spring Edition

DelphiMVCFramework 3.0: l’evoluzione della specie!
Dopo oltre 7 anni di sviluppo ininterrotto DelphiMVCFramework è arrivato alla versione 3.0 ed è uno dei framework RESTful più popolari del mercato. Oltre ad avere nuove caratteristiche, la versione 3.0 si distingue per una serie di refactoring e componentizzazioni che la rendono più snella, veloce, potente ed estendibile. Inoltre, dmvcframework 3.0 aggiunge il supporto per Linux e per la serializatione automatica personalizzata. Anche solo ricompilando un progetto 2.x avrai un importante miglioramento delle performance. In questo talk vedremo cosa c’è di nuovo nella 3.0, tutti i cambiamenti rispetto alla 2.x e come sviluppare soluzioni dmvcframework per Linux. Se già conosci dmvcframework, o anche se vuoi conoscere uno dei framework RESTful per Delphi più popolari, non puoi perdere questo talk.

Delphi per Linux… ma per davvero! Segnali, servizi e daemon
Scrivere un’applicazione console che esponga un servizio TCP o che esegua altre operazioni in background sembra facile. Scriverla correttamente e secondo le best practices tipiche di Linux potrebbe non esserlo. Per chi viene da Windows la conoscenza di alcuni aspetti tipicamente Linux potrebbero fare la differenza tra un software professionale e uno che “da me funziona”. Ad esempio: come gestire i segnali Unix? Come gestire la concorrenza tra segnali? I miei interrupt software sono rientranti? Come far partire un daemon al boot? come farlo ripartire da command line? Come gestire il cambio della configurazione e il restart? Se il daemon dovesse andare in crash, come posso farlo ripartire in automatico? Come definisco le dipendenze tra daemon? In questo speech molto denso di informazioni daremo risposta a tutte queste domande con esempi su Ubuntu Linux scrivendo servizi per systemd (lo standard de facto per sistemi Linux moderni).

Trasforma un database relazionale in un vero decision support system con Elasticsearch
Quando la struttura dei dati è complessa, non strutturata o i dati da ricercare diventano tanti, il database relazionale non è più lo strumento adatto a gestirli in maniera efficiente. Anche il sistema più semplice genera dati non strutturati come log, testi descrittivi, campi “note” e altro. Ostinarsi ad utilizzare un database relazionale in uno scenario del genere è assolutamente controproducente e può comportare problemi di usabilità e performance per gli utenti finali. Tenere traccia dei dati non strutturati non è sufficiente a dargli un senso e a renderli una buona base per un DSS (decision support system). Ancora una volta, usare un database relazionale è una soluzione miope, antiquata e inefficiente al problema. ElasticSearch permette di dare un senso ai dati non strutturati, e/o non omogenei, in maniera efficace ed efficiente. In questo talk vedremo cosa è ElasticSearch e perché potrebbe aver senso integrarlo nella propria soluzione software. La possibilità di affiancare ElasticSearch ad un sistema esistente senza stravolgerne l’architettura attuale, rende la scelta di ElasticSearch vantaggiosa e indolore.

E’ possibile acquistare i biglietti per la conferenza direttamente dal sito.

Ci vediamo a Roma!

DT

ANN: DelphiMVCFramework 3.0 beta

In the last months some of the great 9 DelphiMVCFramework contributors from all over the world, have worked hard to release the version 3.0. Now it is ready to be tested!

dmvcframework

DelphiMVCFramework is one of the most popular RESTful framework for Delphi, so any change has been accurately considered and also its impact on the current 2.x projects has been take in consideration. There are a lot of new core features that will make even more easy to work on (and with) your beloved RESTful framework. Also, all these changes will make the framework even more flexible regarding the serializators even for custom types (yes, now you can register your custom serializer for your data types). Also, JSON is no more the only “built-in” supported format. Well, now JSON is the only format, but now is really easy to add to the serializers registry a brand new serializer which serialize in XML, YAML, BSON, CSV etc. The serializers are recicled between requests to get the maximum performances.

Considering that some often-used methods have been removed or refactored, we tracked all the breacking changes in a document, so that you can evaluate the impact that the new version may have on your projects.

Here the content of the document as it is today (the latest version is available here).

DelphiMVCFramework 3.0.0 breaking changes

  • RenderListAsProperty has been removed from TMVCController. You can set such kind of specialized serializations in your custom base controller.
  • RenderJSONArrayAsProperty has been removed from TMVCController. You can set such kind of specialized serializations in your custom base controller.
  • Render has been removed from TMVCController (was deprecated).
  • Render(TJSONValue) has been removed from TMVCController (use Render(TObject)).
  • Trying to deserialize a TJSONNull the target instance will not be freed anymore (consistency with serialize).
  • Context.Request.BodyAsJSONObject dosen’t exist any more. Use BodyAs or the following pattern to migrate.
JSON := TJSONObject.ParseJSONValue(Context.Request.Body) as TJSONObject;
try
  if not Assigned(JSON) then
    raise EMVCException.Create('Invalid JSON');
  // do something here
finally
  JSON.Free;
end;
  • TMVCConfigKey moved to unit MVCFramework.Commons.
  • TMVCMimeType was renamed to TMVCMediaType.
  • TMVCController.Render (no parameter method) do not exist anymore. If the return is a ResponseStream, use the RenderResponseStream.
  • TMVCController.PushJSONToView was renamed to PushToView and Removed SystemJSON dependency, use the ToJSON method if necessary.

As you can see, the breaking changes are very few and there are very low probabilities that will require you more than 10 minutes to fix them even in a big DelphiMVCFramework 2.x project. I did it for our biggest projects, and 10 minutes are largely over-estimated.

Beta Tests

For the next weeks/months the 3.0 beta version will be available for testing. If no major bugs will be found, the 3.0 will be merged in the main branch.

To test the 3.0 beta version you have to checkout the “pluggable_mapper” branch (clone the repo if you didn’t already, and then checkout the “pluggable_mapper” branch).

You can go back to the 2.1.6 (carbon) when you finished the test. There is no reason to be afraid about the changes. They are really in the deep layers and should not affect the “normal” services.

Happy testing!

Community

Considering all the help requests coming from the users (and the fact that facebook is not permitted in some companies) we at bit Time Professionals (the company which lead the development of DelphiMVCFramework and other open source Delphi projects) decided to create a specific community and leave the facebook group only for announces and polls.

Some of bit Time Professionals Open Source Projects
Some of bit Time Professionals Open Source Projects

So, if you need help about DelphiMVCFramework, LoggerPro, Delphi Redis Client, columbusegg4delphi, Delphi Event Bus, Delphi STOMP client, you can go to the bit Time Professionals Community and ask there. If you want to support the projects or you need fast responses, you can also subscribe to the “professional support” group (with a very low fee) and your requests will get priority upon the other by our engineers (which likely wrote 80% of the framework code). When possibile, the support team will send you a specific sample written specifically to show you how to solve your problem. The “professional” groups will be available soon. If you are interested about prices or other things related to the professional support, ask to professionals(at)bittime(dot)it.

Currently is just started, go to subscribe now!

 

DT