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<!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="utilities for managing state of dataflow execution"><title>flow::utils - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="flow" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Module utils</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../flow/index.html">flow</a><span class="version">1.0.0-beta.4</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module utils</a></h2><h3><a href="#structs">Module Items</a></h3><ul class="block"><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#functions" title="Functions">Functions</a></li><li><a href="#types" title="Type Aliases">Type Aliases</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="../index.html">In crate flow</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">flow</a></div><h1>Module <span>utils</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/flow/utils.rs.html#15-1041">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>utilities for managing state of dataflow execution</p>
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</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.ArrangeHandler.html" title="struct flow::utils::ArrangeHandler">Arrange<wbr>Handler</a></dt><dd>A handler to the inner Arrangement, can be cloned and shared, useful for query it’s inner state</dd><dt><a class="struct" href="struct.Arrangement.html" title="struct flow::utils::Arrangement">Arrangement</a></dt><dd>A shared state of key-value pair for various state in dataflow execution.</dd><dt><a class="struct" href="struct.KeyExpiryManager.html" title="struct flow::utils::KeyExpiryManager">KeyExpiry<wbr>Manager</a></dt><dd>Determine when should a key expire according to it’s event timestamp in key.</dd><dt><a class="struct" href="struct.SizeReportSender.html" title="struct flow::utils::SizeReportSender">Size<wbr>Report<wbr>Sender</a></dt></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.compact_diff_row.html" title="fn flow::utils::compact_diff_row">compact_<wbr>diff_<wbr>row</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.get_value_heap_size.html" title="fn flow::utils::get_value_heap_size">get_<wbr>value_<wbr>heap_<wbr>size</a></dt><dd>Get a estimate of heap size of a value</dd></dl><h2 id="types" class="section-header">Type Aliases<a href="#types" class="anchor">§</a></h2><dl class="item-table"><dt><a class="type" href="type.ArrangeReader.html" title="type flow::utils::ArrangeReader">Arrange<wbr>Reader</a></dt><dd>Simply a type alias for ReadGuard of Arrangement</dd><dt><a class="type" href="type.ArrangeWriter.html" title="type flow::utils::ArrangeWriter">Arrange<wbr>Writer</a></dt><dd>Simply a type alias for WriteGuard of Arrangement</dd><dt><a class="type" href="type.Batch.html" title="type flow::utils::Batch">Batch</a></dt><dd>A batch of updates, arranged by key</dd><dt><a class="type" href="type.Spine.html" title="type flow::utils::Spine">Spine</a></dt><dd>A spine of batches, arranged by timestamp
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TODO(discord9): consider internally index by key, value, and timestamp for faster lookup</dd><dt><a class="type" href="type.StateReportHandler.html" title="type flow::utils::StateReportHandler">State<wbr>Report<wbr>Handler</a></dt><dd>Handle the size report request, and send the report back</dd></dl></section></div></main></body></html> |