In this article, we are activity to appraise Telosys, a cipher bearing tool. We will do that by talking with its author, Laurent Guerin. This will accord us the achievability to apprentice additionally about his angle on cipher bearing and what its users accept able by appliance Telosys.
Code bearing is the simplest and best acclimated address in model-driven development. We use a antecedent of information, a anatomy of model, and we amalgamate it with some arrangement to admission a generated artifact, for example, code.
Personally, I accede cipher bearing as a advantageous entry-level footfall into added avant-garde techniques. Because of this, I anticipate that it is actual important to actualize simple cipher bearing platforms that lower the admission barriers for new users.
As a community, we appetite to move as abounding developers as attainable from autograph repetitive cipher to attractive for smarter solutions. If we accomplish cipher generators attainable and able we will “save” abounding developers and accompany them on the model-driven development and accent engineering side.
So accessible and ample cipher generators like Telosys are acutely admired to the accent engineering community.
This is why I anticipate it can be actual absorbing to babble with Laurent. He, as the columnist of Telosys, is in a abundant position to explain to us what problems bodies try to break appliance cipher bearing and what is accordant to them.
I’m a chief adviser with 30 years of acquaintance in software development and architecture. I’ve formed in altered IT casework companies like Steria, T-Systems, [and] Sogeti Consulting. In my career, I accept captivated altered positions: developer, activity manager, software architect, expert, addition leader, [and] consultant. I’m amorous about software engineering, DevOps, software craftsmanship, and cipher generation. I’m additionally a part-time abecedary at Nantes University.
Telosys is a “lightweight cipher generator,” I beggarly a “pragmatic tool.” I created this cipher architect to accommodate developers a simple and easy-to-use tool. Telosys is advised to be accessible by anybody in any blazon of situation. It allows [devleopers] to accomplish any affectionate of language, so it is a cipher architect adjustable to all types of projects. Moreover, all the apparatus are chargeless and accessible source.
For added information, you can appointment the website.
Appliance Telosys from the command band
A few years ago, I noticed that developers spent a lot of time coding repetitive and arid portions of code. This is a accepted botheration that we appointment on all types of projects behindhand of the development language. This is abnormally accurate during the startup phases of a project.
So, I aboriginal formed on the factorization of the all-encompassing cipher by creating frameworks and libraries to abbreviate the aggregate of cipher to address manually. But there are still abounding apparatus with a repetitive anatomy that charge be created manually by the developers (screens, controllers, DAO, assemblage tests, etc.).
Only cipher bearing can abate this workload. But the “classic” accoutrement (MDA tools, etc.) are usually absolutely abundant and circuitous to use (most of them crave UML models) and therefore, it is not assisting to use them for baby or average projects.
So, I started autograph a cipher architect that does not crave a UML archetypal and that can be calmly acclimated by developers either in an IDE or with a simple command line.
The aboriginal use of the alpha adaptation of Telosys accustomed my aggregation to accomplish the absolute chain band of a Java web appliance in 2 canicule instead of the originally estimated 52 days., which encouraged me to abide my assignment and that is how Telosys was born.
First, Telosys was created by developers for developers. It aloof aims to be businesslike and efficient.
The apperception and development are absolute by some basal principles:
So Telosys can be advised as a appropriate tool. It’s not a cardinal best with a big appulse on projects organization.
You can install it, use it, and annul it whenever you want. Of course, you can additionally use it from the alpha to the end of the activity and capitalize on the models and templates, it’s up to you.
Some users aloof accomplish cipher appliance absolute templates. Others accept created their own templates library and are consistently advance it.
A user has replaced a proprietary and big-ticket cipher architect with Telosys to accomplish his C# web applications.
Another uses Telosys for microservices deployed in the billow with Docker.
Sometimes Telosys is additionally acclimated to apprentice a new language. For example, if you apperceive how to actualize a REST backend in Java and you admiration how to do it in Python, aloof install the Python templates and accomplish the code.
As you can see, the uses are actual varied.
Eclipse plugins development is not actual easy. Abnormally back you charge to actualize altered affectionate of beheld apparatus like editors, views, backdrop editors, advice pages, etc.
To be able you charge adept abounding concepts and APIs:
and so on.
But already aggregate works it’s actual adequate to use Telosys with Eclipse, abnormally for templates bundles creation.
Eclipse has been called because at the alpha of the activity it was the most-used IDE. At the actual alpha (7 years ago) the aboriginal adaptation of the architect was anchored in an Eclipse plugin and anon accompanying with the archetypal editor.
Now, the basal apparatus are acutely alone from the GUI. The appearance are callable appliance an API, so it is attainable to accommodate the architect into any Java application.
Telosys can additionally be acclimated with Beheld Antecedent Cipher and Atom in affiliation the command band tool. Some extensions accept been created for these IDE to accommodate specialized editors for Telosys files.
I anticipate that it would be nice to accept a Telosys plugin for all the Jetbrains IDE (IntelliJ, PyCharm, PHPStorm, GoLand, etc) but appropriate now I don’t accept abundant time to assignment on that. Maybe aing year.
Appliance Telosys with the Eclipse plugin
Code bearing is actual advantageous to accommodate a accepted anatomy for developers. If anybody starts the development by cipher bearing you can be abiding that the abject is constant for all the aggregation and the cipher has a satisfactory affection (respect of the standards, comments, assemblage tests, etc.).
Of course, addition above point is productivity. You can decidedly abate the workload during the antecedent accomplish of apparatus creation. The added entities you manage, the added time you can advance in creating templates.
Code bearing can additionally be acclimated to bound aftermath activating mock-ups of an application. Again the cipher can again be reused in accepted development cycles.
A “scaffolding” access based on an absolute database is additionally actual efficient. I’ve acclimated it abounding times, for new projects or for migrations from a accent to addition one.
I appraisal that in 80-90% of the cases I don’t charge round-trip cipher generation.
Very about it’s not so accessible to use round-trip cipher bearing for the developers because they charge accumulate in apperception what the architect can or cannot do in the code. Moreover, it has an appulse on the antecedent cipher because it requires to administer markers.
I’ve apparent all kinds of companies use cipher generation. But about alone big companies are able to put in abode abundant tools. These companies usually accept abundant processes and the agency to administer them. But this blazon of accoutrement (complex to set up and to use) are sometimes alone because they ultimately apathetic bottomward the development (it’s a shame).
Reactive or Agile companies about charge simpler and lighter tools.
So, the after-effects are mixed. It depends on the context. Cipher bearing is not acceptable for all situations. The amount of ambience up accoutrement is sometimes underestimated. And back you accept a apparatus you should not try to accomplish everything; you accept to apperceive back to stop.
As every cipher generator, Telosys merges the templates with abstracts stored in memory.
This abstracts is mainly the entities managed by the project. All entities are authentic in a “lightweight model” that can be a “database model” or a “DSL model.”
Telosys models are explained on the website, on this page.
A database archetypal is created automatically by Telosys appliance a relational database as the source. In this case, the database action is acclimated as the aboriginal model, anniversary table is advised as an entity, and the relationships are authentic by the adopted keys.
This affectionate of archetypal is stored in a distinct XML file. It can be customized by the user if some changes are appropriate to acclimate the model.
In the case you appetite to actualize a archetypal from scratch, you can use a DSL model. In this case, anniversary commodity is authentic in a argument file. Telosys has its own syntax to ascertain an commodity (see the DSL syntax reference).
So, in summary, Telosys uses XML and argument files with specialized editors to facilitate the models edition.
The archetypal loaded in anamnesis is a “generic model,” an absorption of the accurate models. So, in the aing it will be attainable to use any affectionate of antecedent that can bout with this “generic model.”
Now with adaptation 3.0, its affidavit and specialized editors, any developer is able to adapt absolute templates or to actualize new ones.
This has been absolute on abounding projects with altered akin of developers. Anniversary time a developer is free afterwards about one day of use.
Not yet, but back adaptation 3, the DSL archetypal is now the advertence archetypal for Telosys and I anticipate that one day it will be all-important to catechumen a altered affectionate of antecedent to this model. For example, XMI could be the third blazon of archetypal for Telosys and conceivably it would be simpler to catechumen the XMI antecedent to a Telosys DSL archetypal than to actualize a new accomplishing of the all-encompassing model.
I accept been an Accessible Antecedent adherent for over 20 years. So, for me it’s obvious. I never absurd creating a apparatus that is not accessible source. I appetite to allotment aggregate with users including the antecedent code. I would like the affiliation to abound and to accommodate new annual to abide the apparatus improvement.
Yes, back the absolution of adaptation 3.0 Telosys is added and added downloaded and I accept abounding questions by email, via the appointment or via GitHub.
There are additionally absorbing suggestions, new ideas, new expectations, etc.
To date, the Web is the capital agent to advance information.
The advice on Telosys is absolutely recent; I waited for the absolution of adaptation 3.0 (a above version) to alpha publishing accessories and documentation. But some users accept followed the activity back the aboriginal version.
The Telosys website is now the capital admission point to ascertain the tool. There are additionally some videos on YouTube, a forum, a Twitter account, a LinkedIn group, etc. GitHub is the advertence for the antecedent cipher and it additionally hosts some wikis. A few months ago addition has created a “Telosys” tag on StackOverflow, so you can now ask your questions on this absurd site.
And sometimes I accord presentations with demos in abstruse meetups, developers groups or universities. Do not alternate to acquaintance me if you appetite a presentation.
No, currently it is not planned.
There are altered means to accede cipher generation. As far as I’m concerned, I took the aisle of advantage and lightness. This access accustomed me to actualize a businesslike architect which completes the set of absolute accoutrement like classical MDA tools.
And aing cipher bearing from the developer’s angle is for me the best absorbing aspect. Programming is a ability and it’s a difficult job. It is actual affective to actualize accoutrement that will advice developers to assignment bigger and faster. But it’s not aloof a catechism of productivity, and absolutely not an attack to abate the role of the developer. Generators do not alter developers! A apparatus cannot anticipate instead of the developer, it can alone carbon N times what a developer has advised beforehand. It aloof frees up time to amusement the absorbing genitalia of the development, the apparatus with absolute amount added.
It’s actual agitative to architecture a “developer accompaniment tool” and there are consistently improvements to be added to the tool. It’s like the Grail quest, it’s an amaranthine story.
There’s an commodity about Telosys on the blog “Modeling Languages” which can be interesting: “Telosys: The Concept of a Lightweight Archetypal for Code-Generation.”
And added about all books or accessories that accord with software craftsmanship, apple-pie code, low code, etc.
For example, a book that aggressive me: The Businesslike Programmer by Andrew Hunt & David Thomas. This book contains a lot of abundant annual apropos software development and decidedly some capacity like “Domain Languages,” “The Power of Plain Text,” “Code Generators,” and my admired one “Code Generators Needn’t Be Complex!”
Yes, I apperceive Obeo and added decidedly 2 of its creators (Etienne and Stephane).
I additionally apperceive Jordi, I accept discussed with him sometimes back he was in Nantes.
Indeed, there are abounding bodies in Nantes who assignment about MDD/MDE.
Just a little bulletin for the readers: if you’re absorbed in cipher bearing with pragmatic/lightweight accoutrement and if you’d like to allotment annual about it do not alternate to acquaintance me via my Twitter annual aloof accelerate a mail at [email protected]
A big acknowledge you to Laurent for this account and his assignment on Telosys!
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