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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());
}
}
}
}