Instance vs Static + Option

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QAIX > .Net Development > Instance vs Static + Option 17 May 2008 23:57:33

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Instance vs Static + Option
Brady Kelly 17 May 2008 23:57:33
	I am busy with a new ConfigHelper class, and can't seem to decide on which approach to take. The class is responsible for adjusting the config table in two databases, control and test. My dilemma is whether I make ConfigHelper a static class, and tell it which database to access for each task, or use instance methods and have one instance for each database. =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Davy J 9 May 2008 14:06:38 [ permanent link ]
	I've been using a proxy pattern for stuff like this, I tried using Spring.Net to do it, but what a nightmare to configure for just one or two objects. here's a quick and dirty example hth. Davy J public interface ISettings { object ReadValue(string name); void WriteValue(string name, object value); } /// <summary> /// Public class that is used to read the settings from, not there is no real implementation in this class /// it serves as a proxy class. /// </summary> public class Settings : ISettings { private ISettings proxy; #region ISettings Members private void CheckProxy() { if (proxy == null) { switch (Properties.Settings.Default.CodeVersion) { case "DEBUG": this.proxy = new TestSettings(); return; default: this.proxy = new LiveSettings(); return; } } } public object ReadValue(string name) { CheckProxy(); return proxy.ReadValue(name); } public void WriteValue(string name, object value) { CheckProxy(); proxy.WriteValue(name,object); } #endregion } /// <summary> /// Application class. /// </summary> public class DemoClass { //We create a new class and don't worry about what we will be attacking. private Settings settings = new Settings(); private string connectionString = string.Empty; public DemoClass() { //We get a connection string from the class. connectionString = (string)settings.ReadValue("ConnectionString"); } } =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Peter Obiefuna 9 May 2008 18:44:03 [ permanent link ]
	I would write one static helper class and pass the control/test value as a parameter. public static string SayHello(string message, Environment environment){ if (environment == Environment.Control){ return string.Format("Hello {0} from Control", message); } return string.Format("Hello {0} from Test", message); } -------------------------------------------------- From: "Brady Kelly" <brady@CHASESOFTWARE.CO.ZA> Sent: Wednesday, May 07, 2008 6:39 AM To: <DOTNET-CLR@DISCUSS.DEVELOP.COM> Subject: [DOTNET-CLR] Instance vs Static + Option I am busy with a new ConfigHelper class, and can't seem to decide on which approach to take. The class is responsible for adjusting the config table in two databases, control and test. My dilemma is whether I make ConfigHelper a static class, and tell it which database to access for each task, or use instance methods and have one instance for each database. =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Nick Robinson 16 May 2008 23:38:14 [ permanent link ]
	There isnt enough context to go off, but I would personally prefer an instance over statics. I have found that as soon as I even hint at the word "helper" it polarizes my subsequent thoughts on how to design something. Rarely in my experience do I see a helper without statics (a recent project was more helper than anything else), so as soon as I use the term, I immediately think it will probably have statics. Nick. -----Original Message----- From: brady@chasesoftware.co.za Sent: Wed, 7 May 2008 14:39:36 +0200 To: dotnet-clr@discuss.develop.com Subject: [DOTNET-CLR] Instance vs Static + Option I am busy with a new ConfigHelper class, and can't seem to decide on which approach to take. The class is responsible for adjusting the config table in two databases, control and test. My dilemma is whether I make ConfigHelper a static class, and tell it which database to access for each task, or use instance methods and have one instance for each database. =================================== This list is hosted by DevelopMentor. http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Brady Kelly 17 May 2008 13:35:58 [ permanent link ]
	There isnt enough context to go off, but I would personally prefer an instance over statics. I have found that as soon as I even hint at the word "helper" it polarizes my subsequent thoughts on how to design something. Rarely in my experience do I see a helper without statics (a recent project was more helper than anything else), so as soon as I use the term, I immediately think it will probably have statics. Nick. Maybe Provider would me more apt than helper then. Provider sounds more dedicated. =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Nick Robinson 17 May 2008 17:20:38 [ permanent link ]
	You mean something like ConfigProvider? Does this class provide CRUD style behaviour onto a "config table", or does it do something very specific with a config table? I dont know whether Provider is the right term, but the fact it makes the class feel more dedicated is good. Of course, it could still be a helper, and thats ok. Nick. -----Original Message----- From: brady@chasesoftware.co.za Sent: Sat, 17 May 2008 11:35:58 +0200 To: dotnet-clr@discuss.develop.com Subject: Re: [DOTNET-CLR] Instance vs Static + Option There isnt enough context to go off, but I would personally prefer an instance over statics. I have found that as soon as I even hint at the word "helper" it polarizes my subsequent thoughts on how to design something. Rarely in my experience do I see a helper without statics (a recent project was more helper than anything else), so as soon as I use the term, I immediately think it will probably have statics. Nick. Maybe Provider would me more apt than helper then. Provider sounds more dedicated. =================================== This list is hosted by DevelopMentor. http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com ____________________________________________________________ Receive Notifications of Incoming Messages Easily monitor multiple email accounts & access them with a click. Visit http://www.inbox.com/notifier and check it out! =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Brady Kelly 17 May 2008 17:42:43 [ permanent link ]
	You mean something like ConfigProvider? Does this class provide CRUD style behaviour onto a "config table", or does it do something very specific with a config table? I dont know whether Provider is the right term, but the fact it makes the class feel more dedicated is good. Of course, it could still be a helper, and thats ok. Nick. It provides an application layer maybe one up from CRUD, where it performs sets of CRUD operations on a config table, and other operations, as required for certain tasks. E.g. If I call SetAccountingPackage, it may set fields in the config table to select that accounting package, create an export directory for that accounting package, and set another field in the table to point to that directory. =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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Nick Robinson 17 May 2008 23:57:33 [ permanent link ]
	Right, that sounds like a lot of important behaviour, so back to the original question about Helper, that role feels like you lose an important class. -----Original Message----- From: brady@chasesoftware.co.za Sent: Sat, 17 May 2008 15:42:43 +0200 To: dotnet-clr@discuss.develop.com Subject: Re: [DOTNET-CLR] Instance vs Static + Option You mean something like ConfigProvider? Does this class provide CRUD style behaviour onto a "config table", or does it do something very specific with a config table? I dont know whether Provider is the right term, but the fact it makes the class feel more dedicated is good. Of course, it could still be a helper, and thats ok. Nick. It provides an application layer maybe one up from CRUD, where it performs sets of CRUD operations on a config table, and other operations, as required for certain tasks. E.g. If I call SetAccountingPackage, it may set fields in the config table to select that accounting package, create an export directory for that accounting package, and set another field in the table to point to that directory. =================================== This list is hosted by DevelopMentor. http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
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QAIX > .Net Development > Instance vs Static + Option 17 May 2008 23:57:33

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Instance vs Static + Option

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