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mod.rs
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mod.rs
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const CHECKPOINT_PERIOD: usize = 8;
use std::fmt;
use std::ops::Range;
mod block;
mod skip_index;
mod skip_index_builder;
pub use self::skip_index::SkipIndex;
pub use self::skip_index_builder::SkipIndexBuilder;
use crate::DocId;
/// A checkpoint contains meta-information about
/// a block. Either a block of documents, or another block
/// of checkpoints.
///
/// All of the intervals here defined are semi-open.
/// The checkpoint describes that the block within the `byte_range`
/// and spans over the `doc_range`.
#[derive(Clone, Eq, PartialEq, Default)]
pub struct Checkpoint {
pub doc_range: Range<DocId>,
pub byte_range: Range<usize>,
}
impl Checkpoint {
pub(crate) fn follows(&self, other: &Checkpoint) -> bool {
(self.doc_range.start == other.doc_range.end)
&& (self.byte_range.start == other.byte_range.end)
}
}
impl fmt::Debug for Checkpoint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "(doc={:?}, bytes={:?})", self.doc_range, self.byte_range)
}
}
#[cfg(test)]
mod tests {
use std::io;
use proptest::strategy::{BoxedStrategy, Strategy};
use super::{SkipIndex, SkipIndexBuilder};
use crate::directory::OwnedBytes;
use crate::indexer::NoMergePolicy;
use crate::schema::{SchemaBuilder, STORED, TEXT};
use crate::store::index::Checkpoint;
use crate::{DocAddress, DocId, Index, Term};
#[test]
fn test_skip_index_empty() -> io::Result<()> {
let mut output: Vec<u8> = Vec::new();
let skip_index_builder: SkipIndexBuilder = SkipIndexBuilder::new();
skip_index_builder.serialize_into(&mut output)?;
let skip_index: SkipIndex = SkipIndex::open(OwnedBytes::new(output));
let mut skip_cursor = skip_index.checkpoints();
assert!(skip_cursor.next().is_none());
Ok(())
}
#[test]
fn test_skip_index_single_el() -> io::Result<()> {
let mut output: Vec<u8> = Vec::new();
let mut skip_index_builder: SkipIndexBuilder = SkipIndexBuilder::new();
let checkpoint = Checkpoint {
doc_range: 0..2,
byte_range: 0..3,
};
skip_index_builder.insert(checkpoint.clone());
skip_index_builder.serialize_into(&mut output)?;
let skip_index: SkipIndex = SkipIndex::open(OwnedBytes::new(output));
let mut skip_cursor = skip_index.checkpoints();
assert_eq!(skip_cursor.next(), Some(checkpoint));
assert_eq!(skip_cursor.next(), None);
Ok(())
}
#[test]
fn test_skip_index() -> io::Result<()> {
let mut output: Vec<u8> = Vec::new();
let checkpoints = vec![
Checkpoint {
doc_range: 0..3,
byte_range: 0..9,
},
Checkpoint {
doc_range: 3..4,
byte_range: 9..25,
},
Checkpoint {
doc_range: 4..6,
byte_range: 25..49,
},
Checkpoint {
doc_range: 6..8,
byte_range: 49..81,
},
Checkpoint {
doc_range: 8..10,
byte_range: 81..100,
},
];
let mut skip_index_builder: SkipIndexBuilder = SkipIndexBuilder::new();
for checkpoint in &checkpoints {
skip_index_builder.insert(checkpoint.clone());
}
skip_index_builder.serialize_into(&mut output)?;
let skip_index: SkipIndex = SkipIndex::open(OwnedBytes::new(output));
assert_eq!(
&skip_index.checkpoints().collect::<Vec<_>>()[..],
&checkpoints[..]
);
Ok(())
}
fn offset_test(doc: DocId) -> usize {
(doc as usize) * (doc as usize)
}
#[test]
fn test_merge_store_with_stacking_reproducing_issue969() -> crate::Result<()> {
let mut schema_builder = SchemaBuilder::default();
let text = schema_builder.add_text_field("text", STORED | TEXT);
let body = schema_builder.add_text_field("body", STORED);
let schema = schema_builder.build();
let index = Index::create_in_ram(schema);
let mut index_writer = index.writer_for_tests()?;
index_writer.set_merge_policy(Box::new(NoMergePolicy));
let long_text: String = "abcdefghijklmnopqrstuvwxyz".repeat(1_000);
for _ in 0..20 {
index_writer.add_document(doc!(body=>long_text.clone()))?;
}
index_writer.commit()?;
index_writer.add_document(doc!(text=>"testb"))?;
for _ in 0..10 {
index_writer.add_document(doc!(text=>"testd", body=>long_text.clone()))?;
}
index_writer.commit()?;
index_writer.delete_term(Term::from_field_text(text, "testb"));
index_writer.commit()?;
let segment_ids = index.searchable_segment_ids()?;
index_writer.merge(&segment_ids).wait().unwrap();
let reader = index.reader()?;
let searcher = reader.searcher();
assert_eq!(searcher.num_docs(), 30);
for i in 0..searcher.num_docs() as u32 {
let _doc = searcher.doc(DocAddress::new(0u32, i))?;
}
Ok(())
}
#[test]
fn test_skip_index_long() -> io::Result<()> {
let mut output: Vec<u8> = Vec::new();
let checkpoints: Vec<Checkpoint> = (0..1000)
.map(|i| Checkpoint {
doc_range: i..(i + 1),
byte_range: offset_test(i)..offset_test(i + 1),
})
.collect();
let mut skip_index_builder = SkipIndexBuilder::new();
for checkpoint in &checkpoints {
skip_index_builder.insert(checkpoint.clone());
}
skip_index_builder.serialize_into(&mut output)?;
assert_eq!(output.len(), 4035);
let resulting_checkpoints: Vec<Checkpoint> = SkipIndex::open(OwnedBytes::new(output))
.checkpoints()
.collect();
assert_eq!(&resulting_checkpoints, &checkpoints);
Ok(())
}
fn integrate_delta(vals: Vec<usize>) -> Vec<usize> {
let mut output = Vec::with_capacity(vals.len() + 1);
output.push(0);
let mut prev = 0;
for val in vals {
let new_val = val + prev;
prev = new_val;
output.push(new_val);
}
output
}
// Generates a sequence of n valid checkpoints, with n < max_len.
fn monotonic_checkpoints(max_len: usize) -> BoxedStrategy<Vec<Checkpoint>> {
(0..max_len)
.prop_flat_map(move |len: usize| {
(
proptest::collection::vec(1usize..20, len as usize).prop_map(integrate_delta),
proptest::collection::vec(1usize..26, len as usize).prop_map(integrate_delta),
)
.prop_map(|(docs, offsets)| {
(0..docs.len() - 1)
.map(move |i| Checkpoint {
doc_range: docs[i] as DocId..docs[i + 1] as DocId,
byte_range: offsets[i]..offsets[i + 1],
})
.collect::<Vec<Checkpoint>>()
})
})
.boxed()
}
fn seek_manual<I: Iterator<Item = Checkpoint>>(
checkpoints: I,
target: DocId,
) -> Option<Checkpoint> {
checkpoints
.into_iter()
.find(|checkpoint| checkpoint.doc_range.end > target)
}
fn test_skip_index_aux(skip_index: SkipIndex, checkpoints: &[Checkpoint]) {
if let Some(last_checkpoint) = checkpoints.last() {
for doc in 0u32..last_checkpoint.doc_range.end {
let expected = seek_manual(skip_index.checkpoints(), doc);
assert_eq!(expected, skip_index.seek(doc), "Doc {}", doc);
}
assert!(skip_index.seek(last_checkpoint.doc_range.end).is_none());
}
}
use proptest::prelude::*;
proptest! {
#![proptest_config(ProptestConfig::with_cases(20))]
#[test]
fn test_proptest_skip(checkpoints in monotonic_checkpoints(100)) {
let mut skip_index_builder = SkipIndexBuilder::new();
for checkpoint in checkpoints.iter().cloned() {
skip_index_builder.insert(checkpoint);
}
let mut buffer = Vec::new();
skip_index_builder.serialize_into(&mut buffer).unwrap();
let skip_index = SkipIndex::open(OwnedBytes::new(buffer));
let iter_checkpoints: Vec<Checkpoint> = skip_index.checkpoints().collect();
assert_eq!(&checkpoints[..], &iter_checkpoints[..]);
test_skip_index_aux(skip_index, &checkpoints[..]);
}
}
}