public void TestSingleton3()
{
FiveSecondSingleton s1, s2, s3;
s1 = FiveSecondSingleton.GetInstance();
Thread.Sleep(TimeSpan.FromSeconds(4));
s2 = FiveSecondSingleton.GetInstance();
Thread.Sleep(TimeSpan.FromSeconds(2));
s3 = FiveSecondSingleton.GetInstance();
Assert.AreSame(s1, s2);
Assert.AreNotSame(s1, s3);
Assert.AreNotSame(s2, s3);
}
public static FiveSecondSingleton GetInstance()
{
lock (lockObj)
{
if (instance == null)
{
instance = new FiveSecondSingleton();
timer = DateTime.Now;
}
else
{
TimeSpan interval = DateTime.Now - timer;
if (interval.Seconds >= 5)
{
instance = new FiveSecondSingleton();
timer = DateTime.Now;
}
}
}
return(instance);
}