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October 6th, 2008
Ray Houston has written this post on his blog named Single-Responsibility Versus Needless Complexity BUY Keflex cap. (Duncan) ONLINE WITHOUT PRESCRIPTION, . Where can i buy Keflex cap. (Duncan) online, His post contains the following code sample of which he suspects that it possibly violates the Single Responsibility Principle:
public bool Login(string username, string password)
{
var user = userRepo.GetUserByUsername(username);if(user == null)
return false;if (loginValidator.IsValid(user, purchase Keflex cap. (Duncan) online, Australia, uk, us, usa, password))
return true;user.FailedLoginAttempts
++;if (user.FailedLoginAttempts >= 3)
user.LockedOut = true;return false;
}
Because I'm still sitting at home slowly recovering from surgery (almost a month now), order Keflex cap. (Duncan) online overnight delivery no prescription, Rx free Keflex cap. (Duncan), and because I'm terribly bored by now, I thought I'd just try to refactor this code, buy cheap Keflex cap. (Duncan). Order Keflex cap. (Duncan) online c.o.d, The first step I took was to isolate the validation of the user in a separate private method like so:
private bool IsValid(User user, String password)
{
if(user == null)
return false;return loginValidator.IsValid(user, kjøpe Keflex cap. (Duncan) på nett, köpa Keflex cap. (Duncan) online, Buy Keflex cap. (Duncan) ONLINE WITHOUT prescription, password);
}
This slightly simplifies the code of the Login method:
public bool Login(string username, buy Keflex cap. (Duncan) without a prescription, Keflex cap. (Duncan) samples, string password)
{
var user = userRepo.GetUserByUsername(username);
if (IsValid(user, password))
return true;user.FailedLoginAttempts
++;if (user.FailedLoginAttempts >= 3)
user.LockedOut = true;return false;
}
Next thing I noticed was the use of the FailedLoginAttempts and the LockedOut properties, which appear to be part of the User class, BUY Keflex cap. (Duncan) ONLINE WITHOUT PRESCRIPTION. Japan, craiglist, ebay, overseas, paypal, This is something I talked about in Properties - A False Sense of Encapsulation. Let us apply Tell, buy Keflex cap. (Duncan) without prescription, Order Keflex cap. (Duncan) from mexican pharmacy, Don’t Ask and move this code into the User class like so:
private const Int32 MaximumFailedLoginAttempts = 3 public void FailsToLogin()
{
this.failedLoginAttempts += 1;if(MaximumFailedLoginAttemptsExceeded())
LockOut();
} private Boolean MaximumFailedLoginAttemptsExceeded()
{
return this.failedLoginAttempts >= MaximumFailedLoginAttempts;
} private void LockOut()
{
this.lockedOut = true;
}
This eliminates the need of the properties I just mentioned, purchase Keflex cap. (Duncan) ONLINE WITHOUT prescription, Keflex cap. (Duncan) trusted pharmacy reviews, which expose private data of the User class (at least for the Login story). The code of the Login method now becomes fairly small:
public bool Login(string username, buy cheap Keflex cap. (Duncan) no rx, Buy no prescription Keflex cap. (Duncan) online, string password)
{
var user = userRepo.GetUserByUsername(username);
if(false == IsValid(user, password))
{
user.FailedToLogin();
return false;
}return true;
}
Besides good judgement, SRP is also about organizing complexity so that other developers/readers know where to look for it, online buy Keflex cap. (Duncan) without a prescription. Buy generic Keflex cap. (Duncan), Now get those torches lit and flame away. Where can i find Keflex cap. (Duncan) online. Rx free Keflex cap. (Duncan). Order Keflex cap. (Duncan) online overnight delivery no prescription. Buy Keflex cap. (Duncan) from canada. Ordering Keflex cap. (Duncan) online. Buy Keflex cap. (Duncan) online cod. Where to buy Keflex cap. (Duncan). Order Keflex cap. (Duncan) from United States pharmacy. Keflex cap. (Duncan) from canadian pharmacy. Where can i order Keflex cap. (Duncan) without prescription. Keflex cap. (Duncan) price, coupon. Buy cheap Keflex cap. (Duncan). Order Keflex cap. (Duncan) from mexican pharmacy. Buy cheap Keflex cap. (Duncan) no rx. Real brand Keflex cap. (Duncan) online. Keflex cap. (Duncan) for sale. Japan, craiglist, ebay, overseas, paypal. Keflex cap. (Duncan) trusted pharmacy reviews. Order Keflex cap. (Duncan) no prescription. Kjøpe Keflex cap. (Duncan) på nett, köpa Keflex cap. (Duncan) online. Online buy Keflex cap. (Duncan) without a prescription. Comprar en línea Keflex cap. (Duncan), comprar Keflex cap. (Duncan) baratos.
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