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Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler...
Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler Any unhandled OperationCanceledException will cause the promise cancelation
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r187:dd4a3590f9c6 ref20160224
r187:dd4a3590f9c6 ref20160224
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ActionTaskBase.cs
53 lines | 1.6 KiB | text/x-csharp | CSharpLexer
/ Implab / ActionTaskBase.cs
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using System;
namespace Implab {
public class ActionTaskBase : AbstractTask {
readonly Action<Exception> m_cancel;
readonly Action<Exception> m_error;
protected ActionTaskBase( Action<Exception> error, Action<Exception> cancel, bool autoCancellable) {
m_error = error;
m_cancel = cancel;
if (autoCancellable)
CancellationRequested(CancelOperation);
}
public void Reject(Exception error) {
Safe.ArgumentNotNull(error, "error");
if (LockCancelation())
HandleErrorInternal(error);
}
public override void CancelOperation(Exception reason) {
if (LockCancelation())
HandleCancelInternal(reason);
}
protected void HandleErrorInternal(Exception error) {
if (m_error != null) {
try {
m_error(error);
SetResult();
} catch(Exception err) {
SetErrorInternal(err);
}
} else {
SetErrorInternal(error);
}
}
protected void HandleCancelInternal(Exception error) {
if (m_cancel != null) {
try {
m_cancel(error);
SetResult();
} catch(Exception err) {
HandleErrorInternal(err);
}
} else {
HandleErrorInternal(error ?? new OperationCanceledException());
}
}
}
}