public void CheckConcurrentModificationException()
{
ConcurrentModificationException concurrentModificationException = null;
Category originalCategory = this.errorsFixture.CategoryFixture.CreateCategory();
//update it, then it has a newer version
Category updatedCategory = this.errorsFixture.CategoryFixture.UpdateCategorySetRandomKey(originalCategory);
// then if we try to update the original category it will throw ConCurrentModification Exception
try
{
this.errorsFixture.CategoryFixture.UpdateCategorySetRandomKey(originalCategory);
}
catch (Exception ex)
{
if (ex is AggregateException && ex.InnerException is ConcurrentModificationException exception)
{
concurrentModificationException = exception;
}
}
this.errorsFixture.CategoryFixture.CategoriesToDelete.Add(updatedCategory);
Assert.NotNull(concurrentModificationException);
Assert.Single(concurrentModificationException.ErrorResponse.Errors);
Assert.IsType <ConcurrentModificationError>(concurrentModificationException.ErrorResponse.Errors[0]);
Assert.Equal(concurrentModificationException.GetCurrentVersion(), updatedCategory.Version);
}
public override void Run()
{
while (runThread)
{
try
{
UserGroupInformation.GetCurrentUser().GetCredentials();
}
catch (ConcurrentModificationException cme)
{
this.cme = cme;
Runtime.PrintStackTrace(cme);
runThread = false;
}
catch (IOException ex)
{
Runtime.PrintStackTrace(ex);
}
}
}
/// <summary>
/// Translate certain "special" classes of exception to classes that can be passed through the service boundary.
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
private static bool TranslateException(ref Exception e)
{
// special handling of EntityVersionException
// assume all such exceptions occured because of concurrent modifications
// wrap in ConcurrentModificationException will be used in the fault contract
if (e is EntityVersionException)
{
e = new ConcurrentModificationException(e.Message);
return(true);
}
// special handling of EntityValidationException
// convert to RequestValidationException
if (e is EntityValidationException)
{
e = new RequestValidationException(e.Message);
return(true);
}
return(false);
}
