Skip to main content

Don't name your class "XXXManager"

How to you name your classes? How many classes you have in your current project named "Manager" and "Repository"? In the last period of time I saw a lot of classes named "Manager", so may that I begin to think that this is a suffix for any class that do some actions.
In this blog post I will talk about some suffixed that can be used when we need to name a class. First of all let why I don't like the "Manager" suffix? Because you cannot understand what the class do. Basically, "Manager" is so general that you can put almost anything there. When I read the name of the class I expect to understand what it does. For example a class with "Writer" suffix will tell me that this class is used to write data.
In the next part of the post I will enumerate some common suffix and when we can use them:
  • XXXFactory - Create objects
  • XXXWritter - Write data to a specific location
  • XXXReader - Read data from a specific location
  • XXXProtocol - Define a specific protocal
  • XXXConverter - A coverter that is used to convert from one type to another
  • XXXShepherd - Manage the lifetime of objects from creation to unload (delete)
  • XXXCoordinator - Coordinates a specific action or object
  • XXXBuilder - Is able to create new instances of objects
  • XXXContainer - A container of elements
  • XXXHandler - An handler for some a functionality
  • XXXController - Define a controller for an object
  • XXXEntity - Define an entity
  • XXXView - Define a view for a specific class.
  • XXXTarget
  • XXXSynchronizer
  • XXXBucket
  • XXXAttribute
  • XXXType
  • XXXEditor
  • XXXBase
  • XXXNode
  • XXXItem
  • XXXInfo
  • XXXHelper
  • XXXProvider
  • XXXException
  • XXXService (you can have the same problem as with Manager)
And so on...
There are so many ways how we suffix a class that we don't need to stuck only on one or two names. For example if you see "FooManager" will you be able to know that this class synchronize content with a remote server? If you name your class "FooSynchronizer" any programmer that will read the name of the class will know what it does.
In conclusion try don't stuck only one XXXManager and XXService. The "Clean Code" book is a good starting point.

Comments

  1. indeed: http://c2.com/cgi/wiki?DontNameClassesObjectManagerHandlerOrData :)

    ReplyDelete

Post a Comment

Popular posts from this blog

Windows Docker Containers can make WIN32 API calls, use COM and ASP.NET WebForms

After the last post , I received two interesting questions related to Docker and Windows. People were interested if we do Win32 API calls from a Docker container and if there is support for COM. WIN32 Support To test calls to WIN32 API, let’s try to populate SYSTEM_INFO class. [StructLayout(LayoutKind.Sequential)] public struct SYSTEM_INFO { public uint dwOemId; public uint dwPageSize; public uint lpMinimumApplicationAddress; public uint lpMaximumApplicationAddress; public uint dwActiveProcessorMask; public uint dwNumberOfProcessors; public uint dwProcessorType; public uint dwAllocationGranularity; public uint dwProcessorLevel; public uint dwProcessorRevision; } ... [DllImport("kernel32")] static extern void GetSystemInfo(ref SYSTEM_INFO pSI); ... SYSTEM_INFO pSI = new SYSTEM_INFO(...

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine: threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration: TeamCity .NET 4.51 EF 6.0.2 VS2013 It see...

Navigating Cloud Strategy after Azure Central US Region Outage

 Looking back, July 19, 2024, was challenging for customers using Microsoft Azure or Windows machines. Two major outages affected customers using CrowdStrike Falcon or Microsoft Azure computation resources in the Central US. These two outages affected many people and put many businesses on pause for a few hours or even days. The overlap of these two issues was a nightmare for travellers. In addition to blue screens in the airport terminals, they could not get additional information from the airport website, airline personnel, or the support line because they were affected by the outage in the Central US region or the CrowdStrike outage.   But what happened in reality? A faulty CrowdStrike update affected Windows computers globally, from airports and healthcare to small businesses, affecting over 8.5m computers. Even if the Falson Sensor software defect was identified and a fix deployed shortly after, the recovery took longer. In parallel with CrowdStrike, Microsoft provi...