forked from Deuxfleurs/garage
Implement missing handler for read_range
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b4e96bdcf0
commit
29a1e94f23
1 changed files with 36 additions and 0 deletions
36
src/table.rs
36
src/table.rs
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@ -388,6 +388,10 @@ impl<F: TableSchema + 'static> Table<F> {
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let value = self.handle_read_entry(&key, &sort_key)?;
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Ok(TableRPC::ReadEntryResponse(value))
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}
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TableRPC::ReadRange(key, begin_sort_key, filter, limit) => {
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let values = self.handle_read_range(&key, &begin_sort_key, &filter, limit)?;
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Ok(TableRPC::Update(values))
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}
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TableRPC::Update(pairs) => {
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self.handle_update(pairs).await?;
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Ok(TableRPC::Ok)
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@ -412,6 +416,38 @@ impl<F: TableSchema + 'static> Table<F> {
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}
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}
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fn handle_read_range(
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&self,
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p: &F::P,
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s: &F::S,
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filter: &Option<F::Filter>,
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limit: usize,
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) -> Result<Vec<Arc<ByteBuf>>, Error> {
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let partition_hash = p.hash();
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let first_key = self.tree_key(p, s);
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let mut ret = vec![];
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for item in self.store.range(first_key..) {
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let (key, value) = item?;
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if &key[..32] != partition_hash.as_slice() {
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break;
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}
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let keep = match filter {
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None => true,
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Some(f) => {
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let entry = rmp_serde::decode::from_read_ref::<_, F::E>(value.as_ref())?;
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F::matches_filter(&entry, f)
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}
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};
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if keep {
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ret.push(Arc::new(ByteBuf::from(value.as_ref())));
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}
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if ret.len() >= limit {
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break;
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}
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}
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Ok(ret)
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}
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pub async fn handle_update(
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self: &Arc<Self>,
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mut entries: Vec<Arc<ByteBuf>>,
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