// If 1) reload flag is set to true and 2) OnLoadException handler is not set,
// all exceptions raised during OnReload() will be ignored.
private async Task LoadAsync(bool reload, bool preFetch = false)
{
// Wait for any already running load operations to complete before starting another.
// This can happen if the framework calls Load before the pre-fetch completes.
await Lock.WaitAsync().ConfigureAwait(false);
try
{
// Check if the Data has been prefetched. If this is a reload,
// ignore pre-fetched data. We only prefetch during initialization.
if (DataHasBeenPreFetched && !reload)
{
return;
}
var newData = await SystemsManagerProcessor.GetDataAsync().ConfigureAwait(false) ?? new Dictionary <string, string>();
if (!Data.EquivalentTo(newData))
{
Data = newData;
OnReload();
}
}
catch (Exception ex)
{
if (Source.Optional)
{
return;
}
var ignoreException = reload;
if (Source.OnLoadException != null)
{
var exceptionContext = new SystemsManagerExceptionContext
{
Provider = this,
Exception = ex,
Reload = reload
};
Source.OnLoadException(exceptionContext);
ignoreException = exceptionContext.Ignore;
}
if (!ignoreException)
{
throw;
}
}
finally
{
// Always reset the flag and release the lock
DataHasBeenPreFetched = preFetch;
Lock.Release();
}
}
// If 1) reload flag is set to true and 2) OnLoadException handler is not set,
// all exceptions raised during OnReload() will be ignored.
private async Task LoadAsync(bool reload)
{
try
{
var newData = await SystemsManagerProcessor.GetDataAsync().ConfigureAwait(false) ?? new Dictionary <string, string>();
if (!Data.EquivalentTo(newData))
{
Data = newData;
OnReload();
}
}
catch (Exception ex)
{
if (Source.Optional)
{
return;
}
var ignoreException = reload;
if (Source.OnLoadException != null)
{
var exceptionContext = new SystemsManagerExceptionContext
{
Provider = this,
Exception = ex,
Reload = reload
};
Source.OnLoadException(exceptionContext);
ignoreException = exceptionContext.Ignore;
}
if (!ignoreException)
{
throw;
}
}
}