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Community Member
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Hello,
I would like to make two new "aspects" which are very connected with exceptions handling.
First one would be good for UI scenario, when I want to allow a user to decide repeat or stop the action in case of exception. The code might look like this
bool repeat = false;
do
{
try
{
// itself code
ExportLoop(ExportSettings);
}
// different catches, block OnException(MethodExecutionEventArgs eventArgs)
catch (System.Data.SqlClient.SqlException ex)
{
if (MessageBox.Show("An error ocured, try again?", "Error", MessageBoxButtons.YesNo) == DialogResult.Yes)
repeat = true;
else
repeat = false;
}
} while (repeat);
It seems to me like a new FlowBehavior.Repeat, am I rigth?
The second scenario is for tasks (e.g. network access) which are supposed to repeat X times with Y delay when they are not succesfull. E.g. server is not found, try it for 5 times with 1 second delay.
int delay = 1000; // ms
int left = 5;
while (left>0)
{
try
{
// itself code
ExportLoop(ExportSettings);
repeat = 0;
}
// different catches, block OnException(MethodExecutionEventArgs eventArgs)
catch (System.Data.SqlClient.SqlException ex)
{
repeat--;
Thread.Sleep(delay); // not sure it is the best way how to delay thread
}
}
Is there already any way how to do it with PostSharp right know? How? I haven't look into PostSharp.Core yet. I assume I can't to connect On Entry and On Exit handlers together like (pseudocode):
On Entry (...)
{/*int delay = 1000; int left = 5;do{ */}
On Exit (...)
{/*}while (left>=0);*/}
Is it possible to include it into PostSharp? I can, of course, contribute on it, with testing for example.
Provided code is just an idea, it is not tested.
Jirka Nouza
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Gael Fraiteur
SharpCrafters
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Jirko,
Thank you for your suggestion.
It's a good idea to add the "Repeat" flow behavior.
I would advise to use OnMethodInvocationAspect to implement it using current features.
-gael
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