public void ZeroMinBackoff()
{
RetryPolicy retryPolicy = RetryPolicyFactory.GetRetryPolicy <SqlDatabaseTransientErrorDetectionStrategy>("ZeroMinBackoff");
int execCount = 0;
try
{
retryPolicy.ExecuteAction(() =>
{
execCount++;
throw new TimeoutException("Forced Exception");
});
}
catch (TimeoutException ex)
{
Assert.AreEqual("Forced Exception", ex.Message);
}
Assert.AreEqual <int>(4, execCount, "The action was not executed the expected amount of times");
}
public void DefaultRetryPolicyIsNoRetry()
{
int count = 0;
RetryPolicy connPolicy = RetryPolicyFactory.GetRetryPolicy <MockErrorDetectionStrategy>();
try
{
connPolicy.ExecuteAction(() =>
{
count++;
throw new ApplicationException();
});
}
catch (ApplicationException)
{
Assert.AreEqual(1, count);
}
catch (Exception)
{
Assert.Fail();
}
}
[Ignore] // REVIEW
public void ZeroRetryCount()
{
RetryPolicy retryPolicy = RetryPolicyFactory.GetRetryPolicy <SqlDatabaseTransientErrorDetectionStrategy>("ZeroRetryCount");
int execCount = 0;
double totalDuration = 0;
retryPolicy.Retrying += (sender, args) => totalDuration += args.Delay.TotalMilliseconds;
try
{
retryPolicy.ExecuteAction(() =>
{
execCount++;
throw new TimeoutException("Forced Exception");
});
}
catch (TimeoutException ex)
{
Assert.AreEqual("Forced Exception", ex.Message);
}
Assert.AreEqual <int>(1, execCount, "The action was not executed the expected amount of times");
Assert.AreEqual(0, totalDuration, "Unexpected duration of retry block");
}
protected override void Act()
{
this.retryPolicy = RetryPolicyFactory.GetRetryPolicy <AlwaysTransientErrorDetectionStrategy>("other");
}
private void ExecuteQueryButton_Click(object sender, EventArgs e)
{
int productId, attempts;
if (!int.TryParse(this.ProductId.Text, out productId))
{
this.Log("Invalid product id " + this.ProductId.Text);
}
if (!int.TryParse(this.Attempts.Text, out attempts))
{
this.Log("Invalid attempts " + this.Attempts.Text);
}
var sessionId = Guid.NewGuid().ToString();
try
{
this.ExecuteQueryButton.Enabled = false;
Application.UseWaitCursor = true;
this.ClearLog();
using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ProductsSampleDB"].ConnectionString))
{
connection.Open();
var command = new SqlCommand("dbo.GetProductDetails", connection)
{
CommandType = CommandType.StoredProcedure
};
// Add the input parameters
command.Parameters.AddWithValue("@ProductID", productId);
command.Parameters.AddWithValue("@SessionID", sessionId);
command.Parameters.AddWithValue("@NumberOfTriesBeforeSucceeding", attempts);
var policy = RetryPolicyFactory.GetRetryPolicy <HolSqlTransientErrorDetectionStrategy>("HOL Strategy");
policy.Retrying += (s, a) =>
this.Log(string.Format(CultureInfo.CurrentCulture,
"Retry attempt {1} delay {2}: {0}",
a.LastException.Message,
a.CurrentRetryCount,
a.Delay
)
);
// Execute the command
policy.ExecuteAction(
() =>
{
using (var reader = command.ExecuteReader())
{
// For each record
while (reader.Read())
{
// Log the result
this.Log(string.Format("Product name : {0} ", reader["ProductName"]));
}
}
});
}
}
catch (Exception ex)
{
this.Log(string.Format(CultureInfo.CurrentCulture, "Exception has occurred: {0}", ex.Message));
}
finally
{
this.ResetUi();
}
}
public void ExceptionIsThrownWhenRetryStrategyIsNotDefinedInConfiguration()
{
RetryPolicyFactory.GetRetryPolicy <MockErrorDetectionStrategy>(retryStrategyName: "someinstancewhichdoesnotexist");
}