DateTime Comparision

[ajs]

I have a process that verifies that a server is running. If the server
stops responding I send an email to a support person.

Now I want to add a downtime indicator so that my code does not send
mail if the sever has a scheduled downtime say, Sunday at 23:00 for 4
hrs.

Is there an easy way to see if the current time is within that window?

Thanks
AJS

[ajs]

One other thing to note is that the downtime window is weekly "Every
Sunday at 23:00 for 4hrs". So I don't have a specific day/month/year.
ajs wrote:

I have a process that verifies that a server is running. If the server
stops responding I send an email to a support person.

Now I want to add a downtime indicator so that my code does not send
mail if the sever has a scheduled downtime say, Sunday at 23:00 for 4
hrs.

Is there an easy way to see if the current time is within that window?

Thanks
AJS

[Saad Rehmani]

DateTime overloads the >, <, ==, !=, +, - operators

I have a process that verifies that a server is running. If the server
stops responding I send an email to a support person.

Now I want to add a downtime indicator so that my code does not send
mail if the sever has a scheduled downtime say, Sunday at 23:00 for 4
hrs.

Is there an easy way to see if the current time is within that window?

Thanks
AJS

[james.curran]

DateTime time = DateTime.Now;
if (time.DayOfWeek == DayOfWeek.Sunday && time.Hour == 23) ||
(time.DayOfWeek == DayOfWeek.Monday && time.Hour < 3)
{

But you probably want a more extendable solution.

I speent awy too long on this:

public class Downtime
{
private TimeSpan StartOffset;
private TimeSpan Duration;
public Downtime(TimeSpan off, TimeSpan dur)
{
StartOffset = off;
Duration = dur;
}
public bool TestTime(DateTime StartOfWeek, DateTime time)
{
DateTime dtDowntimeStart = StartOfWeek + StartOffset;
TimeSpan range = time - dtDowntimeStart;

return (range > TimeSpan.Zero && range < Duration);
}
}

To use:
public static void Main()
{
Downtime d1 = new Downtime(new TimeSpan(1, 16, 30, 0),
new TimeSpan(0, 4, 0, 0));
DateTime StartOfWeek = new DateTime(2006, 6, 11);
DateTime time = DateTime.Now;
if (d1.TestTime(StartOfWeek, time))
{
Console.WriteLine("Yes");
}
}

This first parameter to the Downtime constructor is the offset of the
beginning of the downtime from midnight Sunday morning (eg, the one
there is for Monday at 4:30PM)
The second parameter is the duration.

StartOfWeek is the date of the sunday of the current week.

ajs wrote:

I have a process that verifies that a server is running. If the server
stops responding I send an email to a support person.

Now I want to add a downtime indicator so that my code does not send
mail if the sever has a scheduled downtime say, Sunday at 23:00 for 4
hrs.

Is there an easy way to see if the current time is within that window?

Thanks
AJS

[ajs]

Thanks for the reply,

I used an Idea from your code to solve my problem. There is one one
issue that your code didn't account for.

What if the downtime was on a Saturday at 11:00pm for 4 hrs, If I read
your code correctly, if I check for a down time just 2 hours later
(Sunday at 1:00 am) this would not show that I am currently in a down
time.

What I did was I took the downtime Saturday at 11:00pm and created a
LastWeek, ThisWeek and NextWeek DateTime Values. This gave me a 3 week
span of time to cover the overlaps.

Then I compared Now to each of the downtime values. So if any of them
are within the duration value, then I am in a window.

Of course this assumes a downtime of less than 1 week.

AJS

ja**********@gmail.com wrote:

DateTime time = DateTime.Now;
if (time.DayOfWeek == DayOfWeek.Sunday && time.Hour == 23) ||
(time.DayOfWeek == DayOfWeek.Monday && time.Hour < 3)
{

But you probably want a more extendable solution.

I speent awy too long on this:

public class Downtime
{
private TimeSpan StartOffset;
private TimeSpan Duration;
public Downtime(TimeSpan off, TimeSpan dur)
{
StartOffset = off;
Duration = dur;
}
public bool TestTime(DateTime StartOfWeek, DateTime time)
{
DateTime dtDowntimeStart = StartOfWeek + StartOffset;
TimeSpan range = time - dtDowntimeStart;

return (range > TimeSpan.Zero && range < Duration);
}
}

To use:
public static void Main()
{
Downtime d1 = new Downtime(new TimeSpan(1, 16, 30, 0),
new TimeSpan(0, 4, 0, 0));
DateTime StartOfWeek = new DateTime(2006, 6, 11);
DateTime time = DateTime.Now;
if (d1.TestTime(StartOfWeek, time))
{
Console.WriteLine("Yes");
}
}

This first parameter to the Downtime constructor is the offset of the
beginning of the downtime from midnight Sunday morning (eg, the one
there is for Monday at 4:30PM)
The second parameter is the duration.

StartOfWeek is the date of the sunday of the current week.

ajs wrote:

I have a process that verifies that a server is running. If the server
stops responding I send an email to a support person.

Now I want to add a downtime indicator so that my code does not send
mail if the sever has a scheduled downtime say, Sunday at 23:00 for 4
hrs.

Is there an easy way to see if the current time is within that window?

Thanks
AJS

[james.curran]

ajs wrote:

There is one one
issue that your code didn't account for.
Nonsense.

What if the downtime was on a Saturday at 11:00pm for 4 hrs, If I read
your code correctly, if I check for a down time just 2 hours later
(Sunday at 1:00 am) this would not show that I am currently in a down
time.

Of course it will.

TimeSpan range = time - dtDowntimeStart;

time & dtDowntimeStart are full datetime objects, and so, range
will be a proper TimeSpan object, giving the difference in days, hours,
minutes etc.

Truth,
James

[ajs]

Try this;

Set the downtime offset to (6,23,30,0) this is a Saturday at 11:30pm
Set the duration to 4hrs.
Set the StartofWeek to 6/18/2006 a Sunday
Set the time to check to (2006,6,18,0,30,0) this is Sunday at 12:30am

So with these values the downtime is from Sat at 11:30pm to Sun at
3:30am.
Your code will return a "no" for anytime after midnight on Saturday,
because once a new week starts it places Saturday's offset at the end
of this new week. Remember you based your calculations from a beginning
of the week.

This is why you also need to check the previouse week in the
calculation. Easy enough just subtract 7 days and do the check again.
If either results are greater than zero and less than the duration then
we are in a downtime window.

I added a few line to your test,

public bool TestTime(DateTime StartOfWeek, DateTime time)
{
DateTime dtDowntimeStart = StartOfWeek + StartOffset;
TimeSpan ThisWeek = time - dtDowntimeStart;
DateTime dtDowntimeLastWeek =
dtDowntimeStart.Subtract(TimeSpan.FromDays(7));
TimeSpan LastWeek = time - dtDowntimeLastWeek;
if (ThisWeek >TimeSpan.Zero && ThisWeek < Duration){return (true);}
if (LastWeek > TimeSpan.Zero && LastWeek < Duration){return
(true);}
return (false);
}

Not Nonsense,

AJS

ja**********@gmail.com wrote:

ajs wrote:

There is one one
issue that your code didn't account for.

Nonsense.

What if the downtime was on a Saturday at 11:00pm for 4 hrs, If I read
your code correctly, if I check for a down time just 2 hours later
(Sunday at 1:00 am) this would not show that I am currently in a down
time.

Of course it will.

TimeSpan range = time - dtDowntimeStart;

time & dtDowntimeStart are full datetime objects, and so, range
will be a proper TimeSpan object, giving the difference in days, hours,
minutes etc.

Truth,
James

[james.curran]

I see your point. Sorry about doubting you.

ajs wrote:

Try this;

Set the downtime offset to (6,23,30,0) this is a Saturday at 11:30pm
Set the duration to 4hrs.
Set the StartofWeek to 6/18/2006 a Sunday
Set the time to check to (2006,6,18,0,30,0) this is Sunday at 12:30am

[ajs]

No problem, Your code helped me figure out a few things.

-AJS

ja**********@gmail.com wrote:

I see your point. Sorry about doubting you.

ajs wrote:

Try this;

Set the downtime offset to (6,23,30,0) this is a Saturday at 11:30pm
Set the duration to 4hrs.
Set the StartofWeek to 6/18/2006 a Sunday
Set the time to check to (2006,6,18,0,30,0) this is Sunday at 12:30am