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[array_walker] Read multiple array blocks at once

This commit is contained in:
Ming-Hung Tsai 2021-04-17 00:05:08 +08:00
parent c17559791f
commit 3279d8381b
1 changed files with 31 additions and 21 deletions
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52
src/pdata/array_walker.rs
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@ -53,29 +53,39 @@ impl<'a, V: Unpack + Copy> NodeVisitor<u64> for BlockValueVisitor<'a, V> {
let mut errs: Vec<BTreeError> = Vec::new();
// TODO: check index continuity
// FIXME: use IoEngine::read_many()
for (n, index) in keys.iter().enumerate() {
// FIXME: count read errors on its parent (BTreeError::IoError) or on its location
// (ArrayError::IoError)?
let b = self.engine.read(values[n]).map_err(|_| btree::io_err(&path));
if let Err(e) = b {
errs.push(e);
continue;
}
let b = b.unwrap();
path.push(values[n]);
match unpack_array_block::<V>(&path, b.get_data()) {
Ok(array_block) => {
if let Err(e) = self.array_visitor.visit(*index, array_block) {
self.array_errs.lock().unwrap().push(e);
}
},
Err(e) => {
self.array_errs.lock().unwrap().push(e);
match self.engine.read_many(values) {
Err(_) => {
// IO completely failed on all the child blocks
// FIXME: count read errors on its parent (BTreeError::IoError) or on its location
// (ArrayError::IoError)?
for (_i, _b) in values.iter().enumerate() {
errs.push(btree::io_err(&path)); // FIXME: add key_context
}
}
Ok(rblocks) => {
for (i, rb) in rblocks.into_iter().enumerate() {
match rb {
Err(_) => {
errs.push(btree::io_err(&path)); // FIXME: add key_context
},
Ok(b) => {
path.push(b.loc);
match unpack_array_block::<V>(&path, b.get_data()) {
Ok(array_block) => {
// FIXME: will the returned blocks be reordered?
if let Err(e) = self.array_visitor.visit(keys[i], array_block) {
self.array_errs.lock().unwrap().push(e);
}
},
Err(e) => {
self.array_errs.lock().unwrap().push(e);
}
}
path.pop();
},
}
}
}
path.pop();
}
// FIXME: duplicate to BTreeWalker::build_aggregrate()