| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/tantivy-65d0bbbddbbd5d02/433372d/src/indexer/merge_operation.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>merge_operation.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../tantivy/index.html"><div class="logo-container"> |
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| </pre><pre class="rust"><code><span class="kw">use </span>std::collections::HashSet; |
| <span class="kw">use </span>std::ops::Deref; |
| |
| <span class="kw">use crate</span>::{Inventory, Opstamp, SegmentId, TrackedObject}; |
| |
| <span class="attribute">#[derive(Default)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>MergeOperationInventory(Inventory<InnerMergeOperation>); |
| |
| <span class="kw">impl </span>Deref <span class="kw">for </span>MergeOperationInventory { |
| <span class="kw">type </span>Target = Inventory<InnerMergeOperation>; |
| |
| <span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="self">Self</span>::Target { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>MergeOperationInventory { |
| <span class="kw">pub fn </span>segment_in_merge(<span class="kw-2">&</span><span class="self">self</span>) -> HashSet<SegmentId> { |
| <span class="kw">let </span><span class="kw-2">mut </span>segment_in_merge = HashSet::default(); |
| <span class="kw">for </span>merge_op <span class="kw">in </span><span class="self">self</span>.list() { |
| <span class="kw">for </span><span class="kw-2">&</span>segment_id <span class="kw">in </span><span class="kw-2">&</span>merge_op.segment_ids { |
| segment_in_merge.insert(segment_id); |
| } |
| } |
| segment_in_merge |
| } |
| } |
| |
| <span class="doccomment">/// A `MergeOperation` has two roles. |
| /// It carries all of the information required to describe a merge: |
| /// - `target_opstamp` is the opstamp up to which we want to consume the |
| /// delete queue and reflect their deletes. |
| /// - `segment_ids` is the list of segment to be merged. |
| /// |
| /// The second role is to ensure keep track of the fact that these |
| /// segments are in merge and avoid starting a merge operation that |
| /// may conflict with this one. |
| /// |
| /// This works by tracking merge operations. When considering computing |
| /// merge candidates, we simply list tracked merge operations and remove |
| /// their segments from possible merge candidates. |
| </span><span class="kw">pub struct </span>MergeOperation { |
| inner: TrackedObject<InnerMergeOperation>, |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>InnerMergeOperation { |
| target_opstamp: Opstamp, |
| segment_ids: Vec<SegmentId>, |
| } |
| |
| <span class="kw">impl </span>MergeOperation { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new( |
| inventory: <span class="kw-2">&</span>MergeOperationInventory, |
| target_opstamp: Opstamp, |
| segment_ids: Vec<SegmentId>, |
| ) -> MergeOperation { |
| <span class="kw">let </span>inner_merge_operation = InnerMergeOperation { |
| target_opstamp, |
| segment_ids, |
| }; |
| MergeOperation { |
| inner: inventory.track(inner_merge_operation), |
| } |
| } |
| |
| <span class="kw">pub fn </span>target_opstamp(<span class="kw-2">&</span><span class="self">self</span>) -> Opstamp { |
| <span class="self">self</span>.inner.target_opstamp |
| } |
| |
| <span class="kw">pub fn </span>segment_ids(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[SegmentId] { |
| <span class="kw-2">&</span><span class="self">self</span>.inner.segment_ids[..] |
| } |
| } |
| </code></pre></div> |
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