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Consume updates in the order of insertion

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This commit is contained in:
Clément Renault
2019-10-07 15:00:28 +02:00
parent 487411340a
commit 0615c5c52d
2 changed files with 85 additions and 68 deletions
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21
meilidb-core/src/store/updates.rs
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@ -33,6 +33,23 @@ impl Updates {
Ok(Some((number, last_data)))
}
fn first_update_id<'a>(
&self,
reader: &'a impl rkv::Readable,
) -> Result<Option<(u64, Option<Value<'a>>)>, rkv::StoreError>
{
let mut iter = self.updates.iter_start(reader)?;
let (first_key, first_data) = match iter.next() {
Some(result) => result?,
None => return Ok(None),
};
let array = first_key.try_into().unwrap();
let number = u64::from_be_bytes(array);
Ok(Some((number, first_data)))
}
pub fn contains(
&self,
reader: &impl rkv::Readable,
@ -60,12 +77,12 @@ impl Updates {
Ok(last_update_id)
}
pub fn pop_back(
pub fn pop_front(
&self,
writer: &mut rkv::Writer,
) -> MResult<Option<(u64, Update)>>
{
let (last_id, last_data) = match self.last_update_id(writer)? {
let (last_id, last_data) = match self.first_update_id(writer)? {
Some(entry) => entry,
None => return Ok(None),
};