/**
* If a context {@link #isCancelled()} then return the cause of the cancellation or {@code null}
* if context was cancelled without a cause. If the context is not yet cancelled will always
* return {@code null}.
*
* <p>The cancellation cause is provided for informational purposes only and implementations
* should generally assume that it has already been handled and logged properly.
*/
@Nullable
public Throwable cancellationCause() {
if (parent == null || !cascadesCancellation) {
return null;
} else {
return parent.cancellationCause();
}
}
@Override
public void cancelled(Context context) {
if (Context.this instanceof CancellableContext) {
// Record cancellation with its cancellationCause.
((CancellableContext) Context.this).cancel(context.cancellationCause());
} else {
notifyAndClearListeners();
}
}
