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Update the iter_metas UpdateStore method

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Clément Renault 2020-10-19 13:56:32 +02:00
parent 65e32fecb1
commit 8bfa43f9a7
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1 changed files with 12 additions and 16 deletions
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28
src/update_store.rs
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@ -147,28 +147,24 @@ impl<M: 'static> UpdateStore<M> {
}
}
/// Iterate over the pending and the processed metas one after the other,
/// calling the user defined callback for each meta.
pub fn iter_meta<F>(&self, mut f: F) -> heed::Result<()>
/// Execute the user defined function with both meta-store iterators, the first
/// iterator is the *pending* meta one and the secind is the *processed* meta one.
pub fn iter_metas<F, T>(&self, mut f: F) -> heed::Result<T>
where
M: for<'a> Deserialize<'a>,
F: FnMut(u64, M),
F: for<'a> FnMut(
heed::RoIter<'a, OwnedType<BEU64>, SerdeJson<M>>,
heed::RoIter<'a, OwnedType<BEU64>, SerdeJson<M>>,
) -> heed::Result<T>,
{
let rtxn = self.env.read_txn()?;
// We iterate over the pending updates.
for result in self.pending_meta.iter(&rtxn)? {
let (key, meta) = result?;
(f)(key.get(), meta);
}
// We get both the pending and processed meta iterators.
let pending_iter = self.pending_meta.iter(&rtxn)?;
let processed_iter = self.processed_meta.iter(&rtxn)?;
// We iterate over the processed updates.
for result in self.processed_meta.iter(&rtxn)? {
let (key, meta) = result?;
(f)(key.get(), meta);
}
Ok(())
// We execute the user defined function with both iterators.
(f)(pending_iter, processed_iter)
}
/// Returns the update associated meta or `None` if the update deosn't exist.