private void TailPinned(object sender, TailPinnedEventArgs e)
{
Debug.WriteLine($"Log {this.logFileBase}: tail pinned! Suggested that we advance base to {e.TargetSequenceNumber.Identifier()}");
}
void HandleTailPinned()
{
TailPinnedEventArgs args;
SequenceNumber targetLsn;
targetLsn = new SequenceNumber(this.notification.Lsn);
args = new TailPinnedEventArgs(targetLsn);
EventHandler<TailPinnedEventArgs> handler;
handler = this.InternalTailPinned;
if (handler != null)
{
try
{
handler(this, args);
}
#pragma warning suppress 56500 // This is a callback exception
catch (Exception e)
{
try
{
int errorCode = Marshal.GetHRForException(e);
UnsafeNativeMethods.LogTailAdvanceFailure(this.logStore.Handle, errorCode);
}
#pragma warning suppress 56500 // We will be terminating the process with any exception in this call
catch (Exception exception)
{
// If LogTailAdvanceFailure fails, there's nothing we can do to recover.
// If we keep executing, the log's tail will be pinned forever.
// CLFS will never know that we have finished with its notification.
DiagnosticUtility.InvokeFinalHandler(exception);
}
if (Fx.IsFatal(e))
throw;
}
}
else
{
// User hasn't subscribed to TailPinnned. If RetryAppend is true, IO.Log will register for
// notification and invoke CLFS policy to handle LogFull Condition.
// IO.Log must report to CLFS that the log tail cannot be advanced. CLFS expects either
// base to be advanced or report the failure else it will hang waiting for the outcome.
//
try
{
UnsafeNativeMethods.LogTailAdvanceFailure(this.logStore.Handle, 0);
}
#pragma warning suppress 56500 // We will be terminating the process with any exception in this call
catch (Exception exception)
{
// If LogTailAdvanceFailure fails, there's nothing we can do to recover.
// If we keep executing, the log's tail will be pinned forever.
// CLFS will never know that we have finished with its notification.
DiagnosticUtility.InvokeFinalHandler(exception);
}
}
}
void HandleTailPinned()
{
TailPinnedEventArgs args;
SequenceNumber targetLsn;
targetLsn = new SequenceNumber(this.notification.Lsn);
args = new TailPinnedEventArgs(targetLsn);
EventHandler <TailPinnedEventArgs> handler;
handler = this.InternalTailPinned;
if (handler != null)
{
try
{
handler(this, args);
}
#pragma warning suppress 56500 // This is a callback exception
catch (Exception e)
{
try
{
int errorCode = Marshal.GetHRForException(e);
UnsafeNativeMethods.LogTailAdvanceFailure(this.logStore.Handle, errorCode);
}
#pragma warning suppress 56500 // We will be terminating the process with any exception in this call
catch (Exception exception)
{
// If LogTailAdvanceFailure fails, there's nothing we can do to recover.
// If we keep executing, the log's tail will be pinned forever.
// CLFS will never know that we have finished with its notification.
DiagnosticUtility.InvokeFinalHandler(exception);
}
if (Fx.IsFatal(e))
{
throw;
}
}
}
else
{
// User hasn't subscribed to TailPinnned. If RetryAppend is true, IO.Log will register for
// notification and invoke CLFS policy to handle LogFull Condition.
// IO.Log must report to CLFS that the log tail cannot be advanced. CLFS expects either
// base to be advanced or report the failure else it will hang waiting for the outcome.
//
try
{
UnsafeNativeMethods.LogTailAdvanceFailure(this.logStore.Handle, 0);
}
#pragma warning suppress 56500 // We will be terminating the process with any exception in this call
catch (Exception exception)
{
// If LogTailAdvanceFailure fails, there's nothing we can do to recover.
// If we keep executing, the log's tail will be pinned forever.
// CLFS will never know that we have finished with its notification.
DiagnosticUtility.InvokeFinalHandler(exception);
}
}
}
