Skip to main content

#IF DEBUG can be replaces with Conditional attribute

Pe un proiect legacy la care am lucrat anul acesta apareau destul de conditia urmatoare:
#if DEBUG
     //Some code
#endif
Natura proiectului ne obliga sa avem astfel de cod. Problema era ca uneori noi compilam proiectul configurat pentru RELEASE, faceam modificari la cod si in RELEASE totul parea in ordine, dar pe masina de build, aveam erori de compilare, deoarece acesta compila in DEBUG.
Am descoperit zilele acestea un nou atribut care poate sa inlocuiasca aceasta conditie urata.
[Conditional("DEBUG")]
public static void DoSomething()
{
     //Some code
}
Metoda DoSomething o sa fie apelata doar in cazul proiectul este compilat in DEBUG mode.
Cand putem sa folosim aceast atribut?
  • se poate folosi doar in interiorul unei clase sau a unei structuri. Nu incercati sa il puneti pe metoda unei interfete, deoarece o sa dea eroare la compilare
  • metoda pe care o decorati cu acest atribut nu trebuie sa fie neaparat statica, dar nu are voie sa fie implementarea  unei metode din interfata
  • metoda nu trebuie sa fie marcata cu override, dar poate sa contina atributul virtual
  • valoarea returnata de aceasta metoda trebuie obligatoriu sa fie void
Singurul lucru care poate sa  fie confusing este urmatorul cod:
public class Car
{
     public Car()
     {
          DoSomething();
     }     
     [Conditional("DEBUG")]
     public void DoSomething()
    {
          //Some code.
    }    
}
Ce o sa se intample la compilare daca avem setat RELEASE? O sa avem o eroare de compilare? Se va mai apela  metoda noastra? Raspunsul este ca codul general de IL nu va include si apelul la metoda DoSomething() daca compilam pentru RELEASE.
Personal incerc sa evit sa folosesc aceste conditii, nu sunt foarte sanatoase. Dar daca lucram deja pe un proiect care contine conditii de tip #if DEBUG, pentru a refactoriza codul si a scapa de aceste conditii, primul pas este sa le scoatem ca si metode separate, decorate cu atributul Conditional.

Comments

  1. Fain - asa e implementat si Debug.Assert, de ex..

    De conditional compilation in general nu prea ai cum sa scapi cand codul contine metode proprii de logging sau profiling care trebuie sa se execute doar la debug, nu si in release..

    ReplyDelete
  2. Drept. Dar macar le putem tine frumos grupate. Urasc sa dau de cod care contine atat logica cat si tot felu de conditii de compilare.

    ReplyDelete
  3. Adevarul e ca in C#, care nu are un preprocessor adevarat precum C++, genul asta de directive e mult mai rar folosit..

    ReplyDelete

Post a Comment

Popular posts from this blog

Why Database Modernization Matters for AI

  When companies transition to the cloud, they typically begin with applications and virtual machines, which is often the easier part of the process. The actual complexity arises later when databases are moved. To save time and effort, cloud adoption is more of a cloud migration in an IaaS manner, fulfilling current, but not future needs. Even organisations that are already in the cloud find that their databases, although “migrated,” are not genuinely modernised. This disparity becomes particularly evident when they begin to explore AI technologies. Understanding Modernisation Beyond Migration Database modernisation is distinct from merely relocating an outdated database to Azure. It's about making your data layer ready for future needs, like automation, real-time analytics, and AI capabilities. AI needs high throughput, which can be achieved using native DB cloud capabilities. When your database runs in a traditional setup (even hosted in the cloud), in that case, you will enc...

Cloud Myths: Migrating to the cloud is quick and easy (Pill 2 of 5 / Cloud Pills)

The idea that migration to the cloud is simple, straightforward and rapid is a wrong assumption. It’s a common misconception of business stakeholders that generates delays, budget overruns and technical dept. A migration requires laborious planning, technical expertise and a rigorous process.  Migrations, especially cloud migrations, are not one-size-fits-all journeys. One of the most critical steps is under evaluation, under budget and under consideration. The evaluation phase, where existing infrastructure, applications, database, network and the end-to-end estate are evaluated and mapped to a cloud strategy, is crucial to ensure the success of cloud migration. Additional factors such as security, compliance, and system dependencies increase the complexity of cloud migration.  A misconception regarding lift-and-shits is that they are fast and cheap. Moving applications to the cloud without changes does not provide the capability to optimise costs and performance, leading to ...

Cloud Myths: Cloud is Cheaper (Pill 1 of 5 / Cloud Pills)

Cloud Myths: Cloud is Cheaper (Pill 1 of 5 / Cloud Pills) The idea that moving to the cloud reduces the costs is a common misconception. The cloud infrastructure provides flexibility, scalability, and better CAPEX, but it does not guarantee lower costs without proper optimisation and management of the cloud services and infrastructure. Idle and unused resources, overprovisioning, oversize databases, and unnecessary data transfer can increase running costs. The regional pricing mode, multi-cloud complexity, and cost variety add extra complexity to the cost function. Cloud adoption without a cost governance strategy can result in unexpected expenses. Improper usage, combined with a pay-as-you-go model, can result in a nightmare for business stakeholders who cannot track and manage the monthly costs. Cloud-native services such as AI services, managed databases, and analytics platforms are powerful, provide out-of-the-shelve capabilities, and increase business agility and innovation. H...