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Large API Change in the Directory API. (#901)

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Tantivy used to assume that all files could be somehow memory mapped. After this change, Directory return a `FileSlice` that can be reduced and eventually read into an `OwnedBytes` object. Long and blocking io operation are still required by they do not span over the entire file.
This commit is contained in:
Paul Masurel
2020-10-08 16:36:51 +09:00
committed by GitHub
parent 579e3d1ed8
commit c23a03ad81
58 changed files with 1497 additions and 1117 deletions
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8
examples/iterating_docs_and_positions.rs
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@@ -45,7 +45,7 @@ fn main() -> tantivy::Result<()> {
// Inverted index stands for the combination of
// - the term dictionary
// - the inverted lists associated to each terms and their positions
let inverted_index = segment_reader.inverted_index(title);
let inverted_index = segment_reader.inverted_index(title)?;
// A `Term` is a text token associated with a field.
// Let's go through all docs containing the term `title:the` and access their position
@@ -58,7 +58,7 @@ fn main() -> tantivy::Result<()> {
// If you don't need all this information, you may get better performance by decompressing less
// information.
if let Some(mut segment_postings) =
inverted_index.read_postings(&term_the, IndexRecordOption::WithFreqsAndPositions)
inverted_index.read_postings(&term_the, IndexRecordOption::WithFreqsAndPositions)?
{
// this buffer will be used to request for positions
let mut positions: Vec<u32> = Vec::with_capacity(100);
@@ -106,7 +106,7 @@ fn main() -> tantivy::Result<()> {
// Inverted index stands for the combination of
// - the term dictionary
// - the inverted lists associated to each terms and their positions
let inverted_index = segment_reader.inverted_index(title);
let inverted_index = segment_reader.inverted_index(title)?;
// This segment posting object is like a cursor over the documents matching the term.
// The `IndexRecordOption` arguments tells tantivy we will be interested in both term frequencies
@@ -115,7 +115,7 @@ fn main() -> tantivy::Result<()> {
// If you don't need all this information, you may get better performance by decompressing less
// information.
if let Some(mut block_segment_postings) =
inverted_index.read_block_postings(&term_the, IndexRecordOption::Basic)
inverted_index.read_block_postings(&term_the, IndexRecordOption::Basic)?
{
loop {
let docs = block_segment_postings.docs();