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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="Source of the Rust file `src/flow/src/adapter/worker.rs`."><title>worker.rs - source</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="../../../static.files/src-script-813739b1.js"></script><script defer src="../../../src-files.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 src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">flow/adapter/</div>worker.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="comment">// Copyright 2023 Greptime Team
<a href=#2 id=2 data-nosnippet>2</a>//
<a href=#3 id=3 data-nosnippet>3</a>// Licensed under the Apache License, Version 2.0 (the "License");
<a href=#4 id=4 data-nosnippet>4</a>// you may not use this file except in compliance with the License.
<a href=#5 id=5 data-nosnippet>5</a>// You may obtain a copy of the License at
<a href=#6 id=6 data-nosnippet>6</a>//
<a href=#7 id=7 data-nosnippet>7</a>// http://www.apache.org/licenses/LICENSE-2.0
<a href=#8 id=8 data-nosnippet>8</a>//
<a href=#9 id=9 data-nosnippet>9</a>// Unless required by applicable law or agreed to in writing, software
<a href=#10 id=10 data-nosnippet>10</a>// distributed under the License is distributed on an "AS IS" BASIS,
<a href=#11 id=11 data-nosnippet>11</a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a href=#12 id=12 data-nosnippet>12</a>// See the License for the specific language governing permissions and
<a href=#13 id=13 data-nosnippet>13</a>// limitations under the License.
<a href=#14 id=14 data-nosnippet>14</a>
<a href=#15 id=15 data-nosnippet>15</a></span><span class="doccomment">//! For single-thread flow worker
<a href=#16 id=16 data-nosnippet>16</a>
<a href=#17 id=17 data-nosnippet>17</a></span><span class="kw">use </span>std::collections::{BTreeMap, VecDeque};
<a href=#18 id=18 data-nosnippet>18</a><span class="kw">use </span>std::sync::Arc;
<a href=#19 id=19 data-nosnippet>19</a><span class="kw">use </span>std::sync::atomic::{AtomicBool, Ordering};
<a href=#20 id=20 data-nosnippet>20</a>
<a href=#21 id=21 data-nosnippet>21</a><span class="kw">use </span>common_telemetry::info;
<a href=#22 id=22 data-nosnippet>22</a><span class="kw">use </span>dfir_rs::scheduled::graph::Dfir;
<a href=#23 id=23 data-nosnippet>23</a><span class="kw">use </span>enum_as_inner::EnumAsInner;
<a href=#24 id=24 data-nosnippet>24</a><span class="kw">use </span>snafu::ensure;
<a href=#25 id=25 data-nosnippet>25</a><span class="kw">use </span>tokio::sync::{Mutex, broadcast, mpsc, oneshot};
<a href=#26 id=26 data-nosnippet>26</a>
<a href=#27 id=27 data-nosnippet>27</a><span class="kw">use </span><span class="kw">crate</span>::adapter::FlowId;
<a href=#28 id=28 data-nosnippet>28</a><span class="kw">use </span><span class="kw">crate</span>::compute::{Context, DataflowState, ErrCollector};
<a href=#29 id=29 data-nosnippet>29</a><span class="kw">use </span><span class="kw">crate</span>::error::{Error, FlowAlreadyExistSnafu, InternalSnafu, UnexpectedSnafu};
<a href=#30 id=30 data-nosnippet>30</a><span class="kw">use </span><span class="kw">crate</span>::expr::{Batch, GlobalId};
<a href=#31 id=31 data-nosnippet>31</a><span class="kw">use </span><span class="kw">crate</span>::plan::TypedPlan;
<a href=#32 id=32 data-nosnippet>32</a><span class="kw">use </span><span class="kw">crate</span>::repr::{<span class="self">self</span>, DiffRow};
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a><span class="kw">pub type </span>SharedBuf = Arc&lt;Mutex&lt;VecDeque&lt;DiffRow&gt;&gt;&gt;;
<a href=#35 id=35 data-nosnippet>35</a>
<a href=#36 id=36 data-nosnippet>36</a><span class="kw">type </span>ReqId = usize;
<a href=#37 id=37 data-nosnippet>37</a>
<a href=#38 id=38 data-nosnippet>38</a><span class="doccomment">/// Create both worker(`!Send`) and worker handle(`Send + Sync`)
<a href=#39 id=39 data-nosnippet>39</a></span><span class="kw">pub fn </span>create_worker&lt;<span class="lifetime">'a</span>&gt;() -&gt; (WorkerHandle, Worker&lt;<span class="lifetime">'a</span>&gt;) {
<a href=#40 id=40 data-nosnippet>40</a> <span class="kw">let </span>(itc_client, itc_server) = create_inter_thread_call();
<a href=#41 id=41 data-nosnippet>41</a> <span class="kw">let </span>worker_handle = WorkerHandle {
<a href=#42 id=42 data-nosnippet>42</a> itc_client,
<a href=#43 id=43 data-nosnippet>43</a> shutdown: AtomicBool::new(<span class="bool-val">false</span>),
<a href=#44 id=44 data-nosnippet>44</a> };
<a href=#45 id=45 data-nosnippet>45</a> <span class="kw">let </span>worker = Worker {
<a href=#46 id=46 data-nosnippet>46</a> task_states: BTreeMap::new(),
<a href=#47 id=47 data-nosnippet>47</a> itc_server: Arc::new(Mutex::new(itc_server)),
<a href=#48 id=48 data-nosnippet>48</a> };
<a href=#49 id=49 data-nosnippet>49</a> (worker_handle, worker)
<a href=#50 id=50 data-nosnippet>50</a>}
<a href=#51 id=51 data-nosnippet>51</a>
<a href=#52 id=52 data-nosnippet>52</a><span class="doccomment">/// ActiveDataflowState is a wrapper around `Dfir` and `DataflowState`
<a href=#53 id=53 data-nosnippet>53</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>ActiveDataflowState&lt;<span class="lifetime">'subgraph</span>&gt; {
<a href=#54 id=54 data-nosnippet>54</a> df: Dfir&lt;<span class="lifetime">'subgraph</span>&gt;,
<a href=#55 id=55 data-nosnippet>55</a> state: DataflowState,
<a href=#56 id=56 data-nosnippet>56</a> err_collector: ErrCollector,
<a href=#57 id=57 data-nosnippet>57</a>}
<a href=#58 id=58 data-nosnippet>58</a>
<a href=#59 id=59 data-nosnippet>59</a><span class="kw">impl </span>std::fmt::Debug <span class="kw">for </span>ActiveDataflowState&lt;<span class="lifetime">'_</span>&gt; {
<a href=#60 id=60 data-nosnippet>60</a> <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>std::fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; std::fmt::Result {
<a href=#61 id=61 data-nosnippet>61</a> f.debug_struct(<span class="string">"ActiveDataflowState"</span>)
<a href=#62 id=62 data-nosnippet>62</a> .field(<span class="string">"df"</span>, <span class="kw-2">&amp;</span><span class="string">"&lt;Dfir&gt;"</span>)
<a href=#63 id=63 data-nosnippet>63</a> .field(<span class="string">"state"</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.state)
<a href=#64 id=64 data-nosnippet>64</a> .field(<span class="string">"err_collector"</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.err_collector)
<a href=#65 id=65 data-nosnippet>65</a> .finish()
<a href=#66 id=66 data-nosnippet>66</a> }
<a href=#67 id=67 data-nosnippet>67</a>}
<a href=#68 id=68 data-nosnippet>68</a>
<a href=#69 id=69 data-nosnippet>69</a><span class="kw">impl </span>Default <span class="kw">for </span>ActiveDataflowState&lt;<span class="lifetime">'_</span>&gt; {
<a href=#70 id=70 data-nosnippet>70</a> <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
<a href=#71 id=71 data-nosnippet>71</a> ActiveDataflowState {
<a href=#72 id=72 data-nosnippet>72</a> df: Dfir::new(),
<a href=#73 id=73 data-nosnippet>73</a> state: DataflowState::default(),
<a href=#74 id=74 data-nosnippet>74</a> err_collector: ErrCollector::default(),
<a href=#75 id=75 data-nosnippet>75</a> }
<a href=#76 id=76 data-nosnippet>76</a> }
<a href=#77 id=77 data-nosnippet>77</a>}
<a href=#78 id=78 data-nosnippet>78</a>
<a href=#79 id=79 data-nosnippet>79</a><span class="kw">impl</span>&lt;<span class="lifetime">'subgraph</span>&gt; ActiveDataflowState&lt;<span class="lifetime">'subgraph</span>&gt; {
<a href=#80 id=80 data-nosnippet>80</a> <span class="doccomment">/// Create a new render context, assigned with given global id
<a href=#81 id=81 data-nosnippet>81</a> </span><span class="kw">pub fn </span>new_ctx&lt;<span class="lifetime">'ctx</span>&gt;(<span class="kw-2">&amp;</span><span class="lifetime">'ctx </span><span class="kw-2">mut </span><span class="self">self</span>, global_id: GlobalId) -&gt; Context&lt;<span class="lifetime">'ctx</span>, <span class="lifetime">'subgraph</span>&gt;
<a href=#82 id=82 data-nosnippet>82</a> <span class="kw">where
<a href=#83 id=83 data-nosnippet>83</a> </span><span class="lifetime">'subgraph</span>: <span class="lifetime">'ctx</span>,
<a href=#84 id=84 data-nosnippet>84</a> {
<a href=#85 id=85 data-nosnippet>85</a> Context {
<a href=#86 id=86 data-nosnippet>86</a> id: global_id,
<a href=#87 id=87 data-nosnippet>87</a> df: <span class="kw-2">&amp;mut </span><span class="self">self</span>.df,
<a href=#88 id=88 data-nosnippet>88</a> compute_state: <span class="kw-2">&amp;mut </span><span class="self">self</span>.state,
<a href=#89 id=89 data-nosnippet>89</a> err_collector: <span class="self">self</span>.err_collector.clone(),
<a href=#90 id=90 data-nosnippet>90</a> input_collection: Default::default(),
<a href=#91 id=91 data-nosnippet>91</a> local_scope: Default::default(),
<a href=#92 id=92 data-nosnippet>92</a> input_collection_batch: Default::default(),
<a href=#93 id=93 data-nosnippet>93</a> local_scope_batch: Default::default(),
<a href=#94 id=94 data-nosnippet>94</a> }
<a href=#95 id=95 data-nosnippet>95</a> }
<a href=#96 id=96 data-nosnippet>96</a>
<a href=#97 id=97 data-nosnippet>97</a> <span class="kw">pub fn </span>set_current_ts(<span class="kw-2">&amp;mut </span><span class="self">self</span>, ts: repr::Timestamp) {
<a href=#98 id=98 data-nosnippet>98</a> <span class="self">self</span>.state.set_current_ts(ts);
<a href=#99 id=99 data-nosnippet>99</a> }
<a href=#100 id=100 data-nosnippet>100</a>
<a href=#101 id=101 data-nosnippet>101</a> <span class="kw">pub fn </span>set_last_exec_time(<span class="kw-2">&amp;mut </span><span class="self">self</span>, ts: repr::Timestamp) {
<a href=#102 id=102 data-nosnippet>102</a> <span class="self">self</span>.state.set_last_exec_time(ts);
<a href=#103 id=103 data-nosnippet>103</a> }
<a href=#104 id=104 data-nosnippet>104</a>
<a href=#105 id=105 data-nosnippet>105</a> <span class="doccomment">/// Run all available subgraph
<a href=#106 id=106 data-nosnippet>106</a> ///
<a href=#107 id=107 data-nosnippet>107</a> /// return true if any subgraph actually executed
<a href=#108 id=108 data-nosnippet>108</a> </span><span class="kw">pub fn </span>run_available(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; bool {
<a href=#109 id=109 data-nosnippet>109</a> <span class="self">self</span>.state.run_available_with_schedule(<span class="kw-2">&amp;mut </span><span class="self">self</span>.df)
<a href=#110 id=110 data-nosnippet>110</a> }
<a href=#111 id=111 data-nosnippet>111</a>}
<a href=#112 id=112 data-nosnippet>112</a>
<a href=#113 id=113 data-nosnippet>113</a><span class="attr">#[derive(Debug)]
<a href=#114 id=114 data-nosnippet>114</a></span><span class="kw">pub struct </span>WorkerHandle {
<a href=#115 id=115 data-nosnippet>115</a> itc_client: InterThreadCallClient,
<a href=#116 id=116 data-nosnippet>116</a> shutdown: AtomicBool,
<a href=#117 id=117 data-nosnippet>117</a>}
<a href=#118 id=118 data-nosnippet>118</a>
<a href=#119 id=119 data-nosnippet>119</a><span class="kw">impl </span>WorkerHandle {
<a href=#120 id=120 data-nosnippet>120</a> <span class="doccomment">/// create task, return task id
<a href=#121 id=121 data-nosnippet>121</a> </span><span class="kw">pub async fn </span>create_flow(<span class="kw-2">&amp;</span><span class="self">self</span>, create_reqs: Request) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;FlowId&gt;, Error&gt; {
<a href=#122 id=122 data-nosnippet>122</a> <span class="macro">ensure!</span>(
<a href=#123 id=123 data-nosnippet>123</a> <span class="macro">matches!</span>(create_reqs, Request::Create { .. }),
<a href=#124 id=124 data-nosnippet>124</a> InternalSnafu {
<a href=#125 id=125 data-nosnippet>125</a> reason: <span class="macro">format!</span>(
<a href=#126 id=126 data-nosnippet>126</a> <span class="string">"Flow Node/Worker itc failed, expect Request::Create, found {create_reqs:?}"
<a href=#127 id=127 data-nosnippet>127</a> </span>),
<a href=#128 id=128 data-nosnippet>128</a> }
<a href=#129 id=129 data-nosnippet>129</a> );
<a href=#130 id=130 data-nosnippet>130</a>
<a href=#131 id=131 data-nosnippet>131</a> <span class="kw">let </span>ret = <span class="self">self</span>.itc_client.call_with_resp(create_reqs).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#132 id=132 data-nosnippet>132</a> ret.into_create().map_err(|ret| {
<a href=#133 id=133 data-nosnippet>133</a> InternalSnafu {
<a href=#134 id=134 data-nosnippet>134</a> reason: <span class="macro">format!</span>(
<a href=#135 id=135 data-nosnippet>135</a> <span class="string">"Flow Node/Worker itc failed, expect Response::Create, found {ret:?}"
<a href=#136 id=136 data-nosnippet>136</a> </span>),
<a href=#137 id=137 data-nosnippet>137</a> }
<a href=#138 id=138 data-nosnippet>138</a> .build()
<a href=#139 id=139 data-nosnippet>139</a> })<span class="question-mark">?
<a href=#140 id=140 data-nosnippet>140</a> </span>}
<a href=#141 id=141 data-nosnippet>141</a>
<a href=#142 id=142 data-nosnippet>142</a> <span class="doccomment">/// remove task, return task id
<a href=#143 id=143 data-nosnippet>143</a> </span><span class="kw">pub async fn </span>remove_flow(<span class="kw-2">&amp;</span><span class="self">self</span>, flow_id: FlowId) -&gt; <span class="prelude-ty">Result</span>&lt;bool, Error&gt; {
<a href=#144 id=144 data-nosnippet>144</a> <span class="kw">let </span>req = Request::Remove { flow_id };
<a href=#145 id=145 data-nosnippet>145</a>
<a href=#146 id=146 data-nosnippet>146</a> <span class="kw">let </span>ret = <span class="self">self</span>.itc_client.call_with_resp(req).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#147 id=147 data-nosnippet>147</a>
<a href=#148 id=148 data-nosnippet>148</a> ret.into_remove().map_err(|ret| {
<a href=#149 id=149 data-nosnippet>149</a> InternalSnafu {
<a href=#150 id=150 data-nosnippet>150</a> reason: <span class="macro">format!</span>(<span class="string">"Flow Node/Worker failed, expect Response::Remove, found {ret:?}"</span>),
<a href=#151 id=151 data-nosnippet>151</a> }
<a href=#152 id=152 data-nosnippet>152</a> .build()
<a href=#153 id=153 data-nosnippet>153</a> })
<a href=#154 id=154 data-nosnippet>154</a> }
<a href=#155 id=155 data-nosnippet>155</a>
<a href=#156 id=156 data-nosnippet>156</a> <span class="doccomment">/// trigger running the worker, will not block, and will run the worker parallelly
<a href=#157 id=157 data-nosnippet>157</a> ///
<a href=#158 id=158 data-nosnippet>158</a> /// will set the current timestamp to `now` for all dataflows before running them
<a href=#159 id=159 data-nosnippet>159</a> ///
<a href=#160 id=160 data-nosnippet>160</a> /// `blocking` indicate whether it will wait til all dataflows are finished computing if true or
<a href=#161 id=161 data-nosnippet>161</a> /// just start computing and return immediately if false
<a href=#162 id=162 data-nosnippet>162</a> ///
<a href=#163 id=163 data-nosnippet>163</a> /// the returned error is unrecoverable, and the worker should be shutdown/rebooted
<a href=#164 id=164 data-nosnippet>164</a> </span><span class="kw">pub async fn </span>run_available(<span class="kw-2">&amp;</span><span class="self">self</span>, now: repr::Timestamp, blocking: bool) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<a href=#165 id=165 data-nosnippet>165</a> <span class="macro">common_telemetry::trace!</span>(<span class="string">"Running available with blocking={}"</span>, blocking);
<a href=#166 id=166 data-nosnippet>166</a> <span class="kw">if </span>blocking {
<a href=#167 id=167 data-nosnippet>167</a> <span class="kw">let </span>resp = <span class="self">self
<a href=#168 id=168 data-nosnippet>168</a> </span>.itc_client
<a href=#169 id=169 data-nosnippet>169</a> .call_with_resp(Request::RunAvail { now, blocking })
<a href=#170 id=170 data-nosnippet>170</a> .<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#171 id=171 data-nosnippet>171</a> <span class="macro">common_telemetry::trace!</span>(<span class="string">"Running available with response={:?}"</span>, resp);
<a href=#172 id=172 data-nosnippet>172</a> <span class="prelude-val">Ok</span>(())
<a href=#173 id=173 data-nosnippet>173</a> } <span class="kw">else </span>{
<a href=#174 id=174 data-nosnippet>174</a> <span class="self">self</span>.itc_client
<a href=#175 id=175 data-nosnippet>175</a> .call_no_resp(Request::RunAvail { now, blocking })
<a href=#176 id=176 data-nosnippet>176</a> }
<a href=#177 id=177 data-nosnippet>177</a> }
<a href=#178 id=178 data-nosnippet>178</a>
<a href=#179 id=179 data-nosnippet>179</a> <span class="kw">pub async fn </span>contains_flow(<span class="kw-2">&amp;</span><span class="self">self</span>, flow_id: FlowId) -&gt; <span class="prelude-ty">Result</span>&lt;bool, Error&gt; {
<a href=#180 id=180 data-nosnippet>180</a> <span class="kw">let </span>req = Request::ContainTask { flow_id };
<a href=#181 id=181 data-nosnippet>181</a> <span class="kw">let </span>ret = <span class="self">self</span>.itc_client.call_with_resp(req).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#182 id=182 data-nosnippet>182</a>
<a href=#183 id=183 data-nosnippet>183</a> ret.into_contain_task().map_err(|ret| {
<a href=#184 id=184 data-nosnippet>184</a> InternalSnafu {
<a href=#185 id=185 data-nosnippet>185</a> reason: <span class="macro">format!</span>(
<a href=#186 id=186 data-nosnippet>186</a> <span class="string">"Flow Node/Worker itc failed, expect Response::ContainTask, found {ret:?}"
<a href=#187 id=187 data-nosnippet>187</a> </span>),
<a href=#188 id=188 data-nosnippet>188</a> }
<a href=#189 id=189 data-nosnippet>189</a> .build()
<a href=#190 id=190 data-nosnippet>190</a> })
<a href=#191 id=191 data-nosnippet>191</a> }
<a href=#192 id=192 data-nosnippet>192</a>
<a href=#193 id=193 data-nosnippet>193</a> <span class="doccomment">/// shutdown the worker
<a href=#194 id=194 data-nosnippet>194</a> </span><span class="kw">pub fn </span>shutdown(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<a href=#195 id=195 data-nosnippet>195</a> <span class="kw">if </span>!<span class="self">self</span>.shutdown.fetch_or(<span class="bool-val">true</span>, Ordering::SeqCst) {
<a href=#196 id=196 data-nosnippet>196</a> <span class="self">self</span>.itc_client.call_no_resp(Request::Shutdown)
<a href=#197 id=197 data-nosnippet>197</a> } <span class="kw">else </span>{
<a href=#198 id=198 data-nosnippet>198</a> UnexpectedSnafu {
<a href=#199 id=199 data-nosnippet>199</a> reason: <span class="string">"Worker already shutdown"</span>,
<a href=#200 id=200 data-nosnippet>200</a> }
<a href=#201 id=201 data-nosnippet>201</a> .fail()
<a href=#202 id=202 data-nosnippet>202</a> }
<a href=#203 id=203 data-nosnippet>203</a> }
<a href=#204 id=204 data-nosnippet>204</a>
<a href=#205 id=205 data-nosnippet>205</a> <span class="kw">pub async fn </span>get_state_size(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;BTreeMap&lt;FlowId, usize&gt;, Error&gt; {
<a href=#206 id=206 data-nosnippet>206</a> <span class="kw">let </span>ret = <span class="self">self
<a href=#207 id=207 data-nosnippet>207</a> </span>.itc_client
<a href=#208 id=208 data-nosnippet>208</a> .call_with_resp(Request::QueryStateSize)
<a href=#209 id=209 data-nosnippet>209</a> .<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#210 id=210 data-nosnippet>210</a> ret.into_query_state_size().map_err(|ret| {
<a href=#211 id=211 data-nosnippet>211</a> InternalSnafu {
<a href=#212 id=212 data-nosnippet>212</a> reason: <span class="macro">format!</span>(
<a href=#213 id=213 data-nosnippet>213</a> <span class="string">"Flow Node/Worker itc failed, expect Response::QueryStateSize, found {ret:?}"
<a href=#214 id=214 data-nosnippet>214</a> </span>),
<a href=#215 id=215 data-nosnippet>215</a> }
<a href=#216 id=216 data-nosnippet>216</a> .build()
<a href=#217 id=217 data-nosnippet>217</a> })
<a href=#218 id=218 data-nosnippet>218</a> }
<a href=#219 id=219 data-nosnippet>219</a>
<a href=#220 id=220 data-nosnippet>220</a> <span class="kw">pub async fn </span>get_last_exec_time_map(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;BTreeMap&lt;FlowId, i64&gt;, Error&gt; {
<a href=#221 id=221 data-nosnippet>221</a> <span class="kw">let </span>ret = <span class="self">self
<a href=#222 id=222 data-nosnippet>222</a> </span>.itc_client
<a href=#223 id=223 data-nosnippet>223</a> .call_with_resp(Request::QueryLastExecTimeMap)
<a href=#224 id=224 data-nosnippet>224</a> .<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#225 id=225 data-nosnippet>225</a> ret.into_query_last_exec_time_map().map_err(|ret| {
<a href=#226 id=226 data-nosnippet>226</a> InternalSnafu {
<a href=#227 id=227 data-nosnippet>227</a> reason: <span class="macro">format!</span>(
<a href=#228 id=228 data-nosnippet>228</a> <span class="string">"Flow Node/Worker get_last_exec_time_map failed, expect Response::QueryLastExecTimeMap, found {ret:?}"
<a href=#229 id=229 data-nosnippet>229</a> </span>),
<a href=#230 id=230 data-nosnippet>230</a> }
<a href=#231 id=231 data-nosnippet>231</a> .build()
<a href=#232 id=232 data-nosnippet>232</a> })
<a href=#233 id=233 data-nosnippet>233</a> }
<a href=#234 id=234 data-nosnippet>234</a>}
<a href=#235 id=235 data-nosnippet>235</a>
<a href=#236 id=236 data-nosnippet>236</a><span class="kw">impl </span>Drop <span class="kw">for </span>WorkerHandle {
<a href=#237 id=237 data-nosnippet>237</a> <span class="kw">fn </span>drop(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<a href=#238 id=238 data-nosnippet>238</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(ret) = <span class="self">self</span>.shutdown() {
<a href=#239 id=239 data-nosnippet>239</a> <span class="macro">common_telemetry::error!</span>(
<a href=#240 id=240 data-nosnippet>240</a> ret;
<a href=#241 id=241 data-nosnippet>241</a> <span class="string">"While dropping Worker Handle, failed to shutdown worker, worker might be in inconsistent state."
<a href=#242 id=242 data-nosnippet>242</a> </span>);
<a href=#243 id=243 data-nosnippet>243</a> } <span class="kw">else </span>{
<a href=#244 id=244 data-nosnippet>244</a> <span class="macro">info!</span>(<span class="string">"Flow Worker shutdown due to Worker Handle dropped."</span>)
<a href=#245 id=245 data-nosnippet>245</a> }
<a href=#246 id=246 data-nosnippet>246</a> }
<a href=#247 id=247 data-nosnippet>247</a>}
<a href=#248 id=248 data-nosnippet>248</a>
<a href=#249 id=249 data-nosnippet>249</a><span class="doccomment">/// The actual worker that does the work and contain active state
<a href=#250 id=250 data-nosnippet>250</a></span><span class="attr">#[derive(Debug)]
<a href=#251 id=251 data-nosnippet>251</a></span><span class="kw">pub struct </span>Worker&lt;<span class="lifetime">'subgraph</span>&gt; {
<a href=#252 id=252 data-nosnippet>252</a> <span class="doccomment">/// Task states
<a href=#253 id=253 data-nosnippet>253</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) task_states: BTreeMap&lt;FlowId, ActiveDataflowState&lt;<span class="lifetime">'subgraph</span>&gt;&gt;,
<a href=#254 id=254 data-nosnippet>254</a> itc_server: Arc&lt;Mutex&lt;InterThreadCallServer&gt;&gt;,
<a href=#255 id=255 data-nosnippet>255</a>}
<a href=#256 id=256 data-nosnippet>256</a>
<a href=#257 id=257 data-nosnippet>257</a><span class="kw">impl</span>&lt;<span class="lifetime">'s</span>&gt; Worker&lt;<span class="lifetime">'s</span>&gt; {
<a href=#258 id=258 data-nosnippet>258</a> <span class="attr">#[allow(clippy::too_many_arguments)]
<a href=#259 id=259 data-nosnippet>259</a> </span><span class="kw">pub fn </span>create_flow(
<a href=#260 id=260 data-nosnippet>260</a> <span class="kw-2">&amp;mut </span><span class="self">self</span>,
<a href=#261 id=261 data-nosnippet>261</a> flow_id: FlowId,
<a href=#262 id=262 data-nosnippet>262</a> plan: TypedPlan,
<a href=#263 id=263 data-nosnippet>263</a> sink_id: GlobalId,
<a href=#264 id=264 data-nosnippet>264</a> sink_sender: mpsc::UnboundedSender&lt;Batch&gt;,
<a href=#265 id=265 data-nosnippet>265</a> source_ids: <span class="kw-2">&amp;</span>[GlobalId],
<a href=#266 id=266 data-nosnippet>266</a> src_recvs: Vec&lt;broadcast::Receiver&lt;Batch&gt;&gt;,
<a href=#267 id=267 data-nosnippet>267</a> <span class="comment">// TODO(discord9): set expire duration for all arrangement and compare to sys timestamp instead
<a href=#268 id=268 data-nosnippet>268</a> </span>expire_after: <span class="prelude-ty">Option</span>&lt;repr::Duration&gt;,
<a href=#269 id=269 data-nosnippet>269</a> or_replace: bool,
<a href=#270 id=270 data-nosnippet>270</a> create_if_not_exists: bool,
<a href=#271 id=271 data-nosnippet>271</a> err_collector: ErrCollector,
<a href=#272 id=272 data-nosnippet>272</a> ) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;FlowId&gt;, Error&gt; {
<a href=#273 id=273 data-nosnippet>273</a> <span class="kw">let </span>already_exist = <span class="self">self</span>.task_states.contains_key(<span class="kw-2">&amp;</span>flow_id);
<a href=#274 id=274 data-nosnippet>274</a> <span class="kw">match </span>(create_if_not_exists, or_replace, already_exist) {
<a href=#275 id=275 data-nosnippet>275</a> <span class="comment">// if replace, ignore that old flow exists
<a href=#276 id=276 data-nosnippet>276</a> </span>(<span class="kw">_</span>, <span class="bool-val">true</span>, <span class="bool-val">true</span>) =&gt; {
<a href=#277 id=277 data-nosnippet>277</a> <span class="macro">info!</span>(<span class="string">"Replacing flow with id={}"</span>, flow_id);
<a href=#278 id=278 data-nosnippet>278</a> }
<a href=#279 id=279 data-nosnippet>279</a> (<span class="bool-val">false</span>, <span class="bool-val">false</span>, <span class="bool-val">true</span>) =&gt; FlowAlreadyExistSnafu { id: flow_id }.fail()<span class="question-mark">?</span>,
<a href=#280 id=280 data-nosnippet>280</a> <span class="comment">// already exists, and not replace, return None
<a href=#281 id=281 data-nosnippet>281</a> </span>(<span class="bool-val">true</span>, <span class="bool-val">false</span>, <span class="bool-val">true</span>) =&gt; {
<a href=#282 id=282 data-nosnippet>282</a> <span class="macro">info!</span>(<span class="string">"Flow with id={} already exists, do nothing"</span>, flow_id);
<a href=#283 id=283 data-nosnippet>283</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>);
<a href=#284 id=284 data-nosnippet>284</a> }
<a href=#285 id=285 data-nosnippet>285</a> <span class="comment">// continue as normal
<a href=#286 id=286 data-nosnippet>286</a> </span>(<span class="kw">_</span>, <span class="kw">_</span>, <span class="bool-val">false</span>) =&gt; (),
<a href=#287 id=287 data-nosnippet>287</a> }
<a href=#288 id=288 data-nosnippet>288</a>
<a href=#289 id=289 data-nosnippet>289</a> <span class="kw">let </span><span class="kw-2">mut </span>cur_task_state = ActiveDataflowState::&lt;<span class="lifetime">'s</span>&gt; {
<a href=#290 id=290 data-nosnippet>290</a> err_collector,
<a href=#291 id=291 data-nosnippet>291</a> ..Default::default()
<a href=#292 id=292 data-nosnippet>292</a> };
<a href=#293 id=293 data-nosnippet>293</a> cur_task_state.state.set_expire_after(expire_after);
<a href=#294 id=294 data-nosnippet>294</a>
<a href=#295 id=295 data-nosnippet>295</a> {
<a href=#296 id=296 data-nosnippet>296</a> <span class="kw">let </span><span class="kw-2">mut </span>ctx = cur_task_state.new_ctx(sink_id);
<a href=#297 id=297 data-nosnippet>297</a> <span class="kw">for </span>(source_id, src_recv) <span class="kw">in </span>source_ids.iter().zip(src_recvs) {
<a href=#298 id=298 data-nosnippet>298</a> <span class="kw">let </span>bundle = ctx.render_source_batch(src_recv)<span class="question-mark">?</span>;
<a href=#299 id=299 data-nosnippet>299</a> ctx.insert_global_batch(<span class="kw-2">*</span>source_id, bundle);
<a href=#300 id=300 data-nosnippet>300</a> }
<a href=#301 id=301 data-nosnippet>301</a>
<a href=#302 id=302 data-nosnippet>302</a> <span class="kw">let </span>rendered = ctx.render_plan_batch(plan)<span class="question-mark">?</span>;
<a href=#303 id=303 data-nosnippet>303</a> ctx.render_unbounded_sink_batch(rendered, sink_sender);
<a href=#304 id=304 data-nosnippet>304</a> }
<a href=#305 id=305 data-nosnippet>305</a> <span class="self">self</span>.task_states.insert(flow_id, cur_task_state);
<a href=#306 id=306 data-nosnippet>306</a> <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(flow_id))
<a href=#307 id=307 data-nosnippet>307</a> }
<a href=#308 id=308 data-nosnippet>308</a>
<a href=#309 id=309 data-nosnippet>309</a> <span class="doccomment">/// remove task, return true if a task is removed
<a href=#310 id=310 data-nosnippet>310</a> </span><span class="kw">pub fn </span>remove_flow(<span class="kw-2">&amp;mut </span><span class="self">self</span>, flow_id: FlowId) -&gt; bool {
<a href=#311 id=311 data-nosnippet>311</a> <span class="self">self</span>.task_states.remove(<span class="kw-2">&amp;</span>flow_id).is_some()
<a href=#312 id=312 data-nosnippet>312</a> }
<a href=#313 id=313 data-nosnippet>313</a>
<a href=#314 id=314 data-nosnippet>314</a> <span class="doccomment">/// Run the worker, blocking, until shutdown signal is received
<a href=#315 id=315 data-nosnippet>315</a> </span><span class="kw">pub fn </span>run(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<a href=#316 id=316 data-nosnippet>316</a> <span class="kw">loop </span>{
<a href=#317 id=317 data-nosnippet>317</a> <span class="kw">let </span>(req, ret_tx) = <span class="kw">if let </span><span class="prelude-val">Some</span>(ret) = <span class="self">self</span>.itc_server.blocking_lock().blocking_recv() {
<a href=#318 id=318 data-nosnippet>318</a> ret
<a href=#319 id=319 data-nosnippet>319</a> } <span class="kw">else </span>{
<a href=#320 id=320 data-nosnippet>320</a> <span class="macro">common_telemetry::error!</span>(
<a href=#321 id=321 data-nosnippet>321</a> <span class="string">"Worker's itc server has been closed unexpectedly, shutting down worker now."
<a href=#322 id=322 data-nosnippet>322</a> </span>);
<a href=#323 id=323 data-nosnippet>323</a> <span class="kw">break</span>;
<a href=#324 id=324 data-nosnippet>324</a> };
<a href=#325 id=325 data-nosnippet>325</a>
<a href=#326 id=326 data-nosnippet>326</a> <span class="kw">let </span>ret = <span class="self">self</span>.handle_req(req);
<a href=#327 id=327 data-nosnippet>327</a> <span class="kw">match </span>(ret, ret_tx) {
<a href=#328 id=328 data-nosnippet>328</a> (<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(resp)), <span class="prelude-val">Some</span>(ret_tx)) =&gt; {
<a href=#329 id=329 data-nosnippet>329</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(err) = ret_tx.send(resp) {
<a href=#330 id=330 data-nosnippet>330</a> <span class="macro">common_telemetry::error!</span>(
<a href=#331 id=331 data-nosnippet>331</a> err;
<a href=#332 id=332 data-nosnippet>332</a> <span class="string">"Result receiver is dropped, can't send result"
<a href=#333 id=333 data-nosnippet>333</a> </span>);
<a href=#334 id=334 data-nosnippet>334</a> };
<a href=#335 id=335 data-nosnippet>335</a> }
<a href=#336 id=336 data-nosnippet>336</a> (<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), <span class="prelude-val">None</span>) =&gt; <span class="kw">continue</span>,
<a href=#337 id=337 data-nosnippet>337</a> (<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(resp)), <span class="prelude-val">None</span>) =&gt; {
<a href=#338 id=338 data-nosnippet>338</a> <span class="macro">common_telemetry::error!</span>(
<a href=#339 id=339 data-nosnippet>339</a> <span class="string">"Expect no result for current request, but found {resp:?}"
<a href=#340 id=340 data-nosnippet>340</a> </span>)
<a href=#341 id=341 data-nosnippet>341</a> }
<a href=#342 id=342 data-nosnippet>342</a> (<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), <span class="prelude-val">Some</span>(<span class="kw">_</span>)) =&gt; {
<a href=#343 id=343 data-nosnippet>343</a> <span class="macro">common_telemetry::error!</span>(<span class="string">"Expect result for current request, but found nothing"</span>)
<a href=#344 id=344 data-nosnippet>344</a> }
<a href=#345 id=345 data-nosnippet>345</a> (<span class="prelude-val">Err</span>(()), <span class="kw">_</span>) =&gt; {
<a href=#346 id=346 data-nosnippet>346</a> <span class="kw">break</span>;
<a href=#347 id=347 data-nosnippet>347</a> }
<a href=#348 id=348 data-nosnippet>348</a> }
<a href=#349 id=349 data-nosnippet>349</a> }
<a href=#350 id=350 data-nosnippet>350</a> }
<a href=#351 id=351 data-nosnippet>351</a>
<a href=#352 id=352 data-nosnippet>352</a> <span class="doccomment">/// run with tick acquired from tick manager(usually means system time)
<a href=#353 id=353 data-nosnippet>353</a> /// TODO(discord9): better tick management
<a href=#354 id=354 data-nosnippet>354</a> </span><span class="kw">pub fn </span>run_tick(<span class="kw-2">&amp;mut </span><span class="self">self</span>, now: repr::Timestamp) {
<a href=#355 id=355 data-nosnippet>355</a> <span class="kw">for </span>(_flow_id, task_state) <span class="kw">in </span><span class="self">self</span>.task_states.iter_mut() {
<a href=#356 id=356 data-nosnippet>356</a> task_state.set_current_ts(now);
<a href=#357 id=357 data-nosnippet>357</a> task_state.set_last_exec_time(now);
<a href=#358 id=358 data-nosnippet>358</a> task_state.run_available();
<a href=#359 id=359 data-nosnippet>359</a> }
<a href=#360 id=360 data-nosnippet>360</a> }
<a href=#361 id=361 data-nosnippet>361</a> <span class="doccomment">/// handle request, return response if any, Err if receive shutdown signal
<a href=#362 id=362 data-nosnippet>362</a> ///
<a href=#363 id=363 data-nosnippet>363</a> /// return `Err(())` if receive shutdown request
<a href=#364 id=364 data-nosnippet>364</a> </span><span class="kw">fn </span>handle_req(<span class="kw-2">&amp;mut </span><span class="self">self</span>, req: Request) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;Response&gt;, ()&gt; {
<a href=#365 id=365 data-nosnippet>365</a> <span class="kw">let </span>ret = <span class="kw">match </span>req {
<a href=#366 id=366 data-nosnippet>366</a> Request::Create {
<a href=#367 id=367 data-nosnippet>367</a> flow_id,
<a href=#368 id=368 data-nosnippet>368</a> plan,
<a href=#369 id=369 data-nosnippet>369</a> sink_id,
<a href=#370 id=370 data-nosnippet>370</a> sink_sender,
<a href=#371 id=371 data-nosnippet>371</a> source_ids,
<a href=#372 id=372 data-nosnippet>372</a> src_recvs,
<a href=#373 id=373 data-nosnippet>373</a> expire_after,
<a href=#374 id=374 data-nosnippet>374</a> or_replace,
<a href=#375 id=375 data-nosnippet>375</a> create_if_not_exists,
<a href=#376 id=376 data-nosnippet>376</a> err_collector,
<a href=#377 id=377 data-nosnippet>377</a> } =&gt; {
<a href=#378 id=378 data-nosnippet>378</a> <span class="kw">let </span>task_create_result = <span class="self">self</span>.create_flow(
<a href=#379 id=379 data-nosnippet>379</a> flow_id,
<a href=#380 id=380 data-nosnippet>380</a> plan,
<a href=#381 id=381 data-nosnippet>381</a> sink_id,
<a href=#382 id=382 data-nosnippet>382</a> sink_sender,
<a href=#383 id=383 data-nosnippet>383</a> <span class="kw-2">&amp;</span>source_ids,
<a href=#384 id=384 data-nosnippet>384</a> src_recvs,
<a href=#385 id=385 data-nosnippet>385</a> expire_after,
<a href=#386 id=386 data-nosnippet>386</a> or_replace,
<a href=#387 id=387 data-nosnippet>387</a> create_if_not_exists,
<a href=#388 id=388 data-nosnippet>388</a> err_collector,
<a href=#389 id=389 data-nosnippet>389</a> );
<a href=#390 id=390 data-nosnippet>390</a> <span class="prelude-val">Some</span>(Response::Create {
<a href=#391 id=391 data-nosnippet>391</a> result: task_create_result,
<a href=#392 id=392 data-nosnippet>392</a> })
<a href=#393 id=393 data-nosnippet>393</a> }
<a href=#394 id=394 data-nosnippet>394</a> Request::Remove { flow_id } =&gt; {
<a href=#395 id=395 data-nosnippet>395</a> <span class="kw">let </span>ret = <span class="self">self</span>.remove_flow(flow_id);
<a href=#396 id=396 data-nosnippet>396</a> <span class="prelude-val">Some</span>(Response::Remove { result: ret })
<a href=#397 id=397 data-nosnippet>397</a> }
<a href=#398 id=398 data-nosnippet>398</a> Request::RunAvail { now, blocking } =&gt; {
<a href=#399 id=399 data-nosnippet>399</a> <span class="self">self</span>.run_tick(now);
<a href=#400 id=400 data-nosnippet>400</a> <span class="kw">if </span>blocking {
<a href=#401 id=401 data-nosnippet>401</a> <span class="prelude-val">Some</span>(Response::RunAvail)
<a href=#402 id=402 data-nosnippet>402</a> } <span class="kw">else </span>{
<a href=#403 id=403 data-nosnippet>403</a> <span class="prelude-val">None
<a href=#404 id=404 data-nosnippet>404</a> </span>}
<a href=#405 id=405 data-nosnippet>405</a> }
<a href=#406 id=406 data-nosnippet>406</a> Request::ContainTask { flow_id } =&gt; {
<a href=#407 id=407 data-nosnippet>407</a> <span class="kw">let </span>ret = <span class="self">self</span>.task_states.contains_key(<span class="kw-2">&amp;</span>flow_id);
<a href=#408 id=408 data-nosnippet>408</a> <span class="prelude-val">Some</span>(Response::ContainTask { result: ret })
<a href=#409 id=409 data-nosnippet>409</a> }
<a href=#410 id=410 data-nosnippet>410</a> Request::Shutdown =&gt; <span class="kw">return </span><span class="prelude-val">Err</span>(()),
<a href=#411 id=411 data-nosnippet>411</a> Request::QueryStateSize =&gt; {
<a href=#412 id=412 data-nosnippet>412</a> <span class="kw">let </span><span class="kw-2">mut </span>ret = BTreeMap::new();
<a href=#413 id=413 data-nosnippet>413</a> <span class="kw">for </span>(flow_id, task_state) <span class="kw">in </span><span class="self">self</span>.task_states.iter() {
<a href=#414 id=414 data-nosnippet>414</a> ret.insert(<span class="kw-2">*</span>flow_id, task_state.state.get_state_size());
<a href=#415 id=415 data-nosnippet>415</a> }
<a href=#416 id=416 data-nosnippet>416</a> <span class="prelude-val">Some</span>(Response::QueryStateSize { result: ret })
<a href=#417 id=417 data-nosnippet>417</a> }
<a href=#418 id=418 data-nosnippet>418</a> Request::QueryLastExecTimeMap =&gt; {
<a href=#419 id=419 data-nosnippet>419</a> <span class="kw">let </span><span class="kw-2">mut </span>ret = BTreeMap::new();
<a href=#420 id=420 data-nosnippet>420</a> <span class="kw">for </span>(flow_id, task_state) <span class="kw">in </span><span class="self">self</span>.task_states.iter() {
<a href=#421 id=421 data-nosnippet>421</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(last_exec_time) = task_state.state.last_exec_time() {
<a href=#422 id=422 data-nosnippet>422</a> ret.insert(<span class="kw-2">*</span>flow_id, last_exec_time);
<a href=#423 id=423 data-nosnippet>423</a> }
<a href=#424 id=424 data-nosnippet>424</a> }
<a href=#425 id=425 data-nosnippet>425</a> <span class="prelude-val">Some</span>(Response::QueryLastExecTimeMap { result: ret })
<a href=#426 id=426 data-nosnippet>426</a> }
<a href=#427 id=427 data-nosnippet>427</a> };
<a href=#428 id=428 data-nosnippet>428</a> <span class="prelude-val">Ok</span>(ret)
<a href=#429 id=429 data-nosnippet>429</a> }
<a href=#430 id=430 data-nosnippet>430</a>}
<a href=#431 id=431 data-nosnippet>431</a>
<a href=#432 id=432 data-nosnippet>432</a><span class="attr">#[derive(Debug, EnumAsInner)]
<a href=#433 id=433 data-nosnippet>433</a></span><span class="kw">pub enum </span>Request {
<a href=#434 id=434 data-nosnippet>434</a> Create {
<a href=#435 id=435 data-nosnippet>435</a> flow_id: FlowId,
<a href=#436 id=436 data-nosnippet>436</a> plan: TypedPlan,
<a href=#437 id=437 data-nosnippet>437</a> sink_id: GlobalId,
<a href=#438 id=438 data-nosnippet>438</a> sink_sender: mpsc::UnboundedSender&lt;Batch&gt;,
<a href=#439 id=439 data-nosnippet>439</a> source_ids: Vec&lt;GlobalId&gt;,
<a href=#440 id=440 data-nosnippet>440</a> src_recvs: Vec&lt;broadcast::Receiver&lt;Batch&gt;&gt;,
<a href=#441 id=441 data-nosnippet>441</a> expire_after: <span class="prelude-ty">Option</span>&lt;repr::Duration&gt;,
<a href=#442 id=442 data-nosnippet>442</a> or_replace: bool,
<a href=#443 id=443 data-nosnippet>443</a> create_if_not_exists: bool,
<a href=#444 id=444 data-nosnippet>444</a> err_collector: ErrCollector,
<a href=#445 id=445 data-nosnippet>445</a> },
<a href=#446 id=446 data-nosnippet>446</a> Remove {
<a href=#447 id=447 data-nosnippet>447</a> flow_id: FlowId,
<a href=#448 id=448 data-nosnippet>448</a> },
<a href=#449 id=449 data-nosnippet>449</a> <span class="doccomment">/// Trigger the worker to run, useful after input buffer is full
<a href=#450 id=450 data-nosnippet>450</a> </span>RunAvail {
<a href=#451 id=451 data-nosnippet>451</a> now: repr::Timestamp,
<a href=#452 id=452 data-nosnippet>452</a> blocking: bool,
<a href=#453 id=453 data-nosnippet>453</a> },
<a href=#454 id=454 data-nosnippet>454</a> ContainTask {
<a href=#455 id=455 data-nosnippet>455</a> flow_id: FlowId,
<a href=#456 id=456 data-nosnippet>456</a> },
<a href=#457 id=457 data-nosnippet>457</a> Shutdown,
<a href=#458 id=458 data-nosnippet>458</a> QueryStateSize,
<a href=#459 id=459 data-nosnippet>459</a> QueryLastExecTimeMap,
<a href=#460 id=460 data-nosnippet>460</a>}
<a href=#461 id=461 data-nosnippet>461</a>
<a href=#462 id=462 data-nosnippet>462</a><span class="attr">#[derive(Debug, EnumAsInner)]
<a href=#463 id=463 data-nosnippet>463</a></span><span class="kw">enum </span>Response {
<a href=#464 id=464 data-nosnippet>464</a> Create {
<a href=#465 id=465 data-nosnippet>465</a> result: <span class="prelude-ty">Result</span>&lt;<span class="prelude-ty">Option</span>&lt;FlowId&gt;, Error&gt;,
<a href=#466 id=466 data-nosnippet>466</a> <span class="comment">// TODO(discord9): add flow err_collector
<a href=#467 id=467 data-nosnippet>467</a> </span>},
<a href=#468 id=468 data-nosnippet>468</a> Remove {
<a href=#469 id=469 data-nosnippet>469</a> result: bool,
<a href=#470 id=470 data-nosnippet>470</a> },
<a href=#471 id=471 data-nosnippet>471</a> ContainTask {
<a href=#472 id=472 data-nosnippet>472</a> result: bool,
<a href=#473 id=473 data-nosnippet>473</a> },
<a href=#474 id=474 data-nosnippet>474</a> RunAvail,
<a href=#475 id=475 data-nosnippet>475</a> QueryStateSize {
<a href=#476 id=476 data-nosnippet>476</a> <span class="doccomment">/// each flow tasks' state size
<a href=#477 id=477 data-nosnippet>477</a> </span>result: BTreeMap&lt;FlowId, usize&gt;,
<a href=#478 id=478 data-nosnippet>478</a> },
<a href=#479 id=479 data-nosnippet>479</a> QueryLastExecTimeMap {
<a href=#480 id=480 data-nosnippet>480</a> <span class="doccomment">/// each flow tasks' last execution time
<a href=#481 id=481 data-nosnippet>481</a> </span>result: BTreeMap&lt;FlowId, i64&gt;,
<a href=#482 id=482 data-nosnippet>482</a> },
<a href=#483 id=483 data-nosnippet>483</a>}
<a href=#484 id=484 data-nosnippet>484</a>
<a href=#485 id=485 data-nosnippet>485</a><span class="kw">fn </span>create_inter_thread_call() -&gt; (InterThreadCallClient, InterThreadCallServer) {
<a href=#486 id=486 data-nosnippet>486</a> <span class="kw">let </span>(arg_send, arg_recv) = mpsc::unbounded_channel();
<a href=#487 id=487 data-nosnippet>487</a> <span class="kw">let </span>client = InterThreadCallClient {
<a href=#488 id=488 data-nosnippet>488</a> arg_sender: arg_send,
<a href=#489 id=489 data-nosnippet>489</a> };
<a href=#490 id=490 data-nosnippet>490</a> <span class="kw">let </span>server = InterThreadCallServer { arg_recv };
<a href=#491 id=491 data-nosnippet>491</a> (client, server)
<a href=#492 id=492 data-nosnippet>492</a>}
<a href=#493 id=493 data-nosnippet>493</a>
<a href=#494 id=494 data-nosnippet>494</a><span class="attr">#[derive(Debug)]
<a href=#495 id=495 data-nosnippet>495</a></span><span class="kw">struct </span>InterThreadCallClient {
<a href=#496 id=496 data-nosnippet>496</a> arg_sender: mpsc::UnboundedSender&lt;(Request, <span class="prelude-ty">Option</span>&lt;oneshot::Sender&lt;Response&gt;&gt;)&gt;,
<a href=#497 id=497 data-nosnippet>497</a>}
<a href=#498 id=498 data-nosnippet>498</a>
<a href=#499 id=499 data-nosnippet>499</a><span class="kw">impl </span>InterThreadCallClient {
<a href=#500 id=500 data-nosnippet>500</a> <span class="doccomment">/// call without response
<a href=#501 id=501 data-nosnippet>501</a> </span><span class="kw">fn </span>call_no_resp(<span class="kw-2">&amp;</span><span class="self">self</span>, req: Request) -&gt; <span class="prelude-ty">Result</span>&lt;(), Error&gt; {
<a href=#502 id=502 data-nosnippet>502</a> <span class="self">self</span>.arg_sender.send((req, <span class="prelude-val">None</span>)).map_err(from_send_error)
<a href=#503 id=503 data-nosnippet>503</a> }
<a href=#504 id=504 data-nosnippet>504</a>
<a href=#505 id=505 data-nosnippet>505</a> <span class="doccomment">/// call with response
<a href=#506 id=506 data-nosnippet>506</a> </span><span class="kw">async fn </span>call_with_resp(<span class="kw-2">&amp;</span><span class="self">self</span>, req: Request) -&gt; <span class="prelude-ty">Result</span>&lt;Response, Error&gt; {
<a href=#507 id=507 data-nosnippet>507</a> <span class="kw">let </span>(tx, rx) = oneshot::channel();
<a href=#508 id=508 data-nosnippet>508</a> <span class="self">self</span>.arg_sender
<a href=#509 id=509 data-nosnippet>509</a> .send((req, <span class="prelude-val">Some</span>(tx)))
<a href=#510 id=510 data-nosnippet>510</a> .map_err(from_send_error)<span class="question-mark">?</span>;
<a href=#511 id=511 data-nosnippet>511</a> rx.<span class="kw">await</span>.map_err(|<span class="kw">_</span>| {
<a href=#512 id=512 data-nosnippet>512</a> InternalSnafu {
<a href=#513 id=513 data-nosnippet>513</a> reason: <span class="string">"Sender is dropped"</span>,
<a href=#514 id=514 data-nosnippet>514</a> }
<a href=#515 id=515 data-nosnippet>515</a> .build()
<a href=#516 id=516 data-nosnippet>516</a> })
<a href=#517 id=517 data-nosnippet>517</a> }
<a href=#518 id=518 data-nosnippet>518</a>}
<a href=#519 id=519 data-nosnippet>519</a>
<a href=#520 id=520 data-nosnippet>520</a><span class="attr">#[derive(Debug)]
<a href=#521 id=521 data-nosnippet>521</a></span><span class="kw">struct </span>InterThreadCallServer {
<a href=#522 id=522 data-nosnippet>522</a> <span class="kw">pub </span>arg_recv: mpsc::UnboundedReceiver&lt;(Request, <span class="prelude-ty">Option</span>&lt;oneshot::Sender&lt;Response&gt;&gt;)&gt;,
<a href=#523 id=523 data-nosnippet>523</a>}
<a href=#524 id=524 data-nosnippet>524</a>
<a href=#525 id=525 data-nosnippet>525</a><span class="kw">impl </span>InterThreadCallServer {
<a href=#526 id=526 data-nosnippet>526</a> <span class="kw">pub async fn </span>recv(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;(Request, <span class="prelude-ty">Option</span>&lt;oneshot::Sender&lt;Response&gt;&gt;)&gt; {
<a href=#527 id=527 data-nosnippet>527</a> <span class="self">self</span>.arg_recv.recv().<span class="kw">await
<a href=#528 id=528 data-nosnippet>528</a> </span>}
<a href=#529 id=529 data-nosnippet>529</a>
<a href=#530 id=530 data-nosnippet>530</a> <span class="kw">pub fn </span>blocking_recv(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;(Request, <span class="prelude-ty">Option</span>&lt;oneshot::Sender&lt;Response&gt;&gt;)&gt; {
<a href=#531 id=531 data-nosnippet>531</a> <span class="self">self</span>.arg_recv.blocking_recv()
<a href=#532 id=532 data-nosnippet>532</a> }
<a href=#533 id=533 data-nosnippet>533</a>}
<a href=#534 id=534 data-nosnippet>534</a>
<a href=#535 id=535 data-nosnippet>535</a><span class="kw">fn </span>from_send_error&lt;T&gt;(err: mpsc::error::SendError&lt;T&gt;) -&gt; Error {
<a href=#536 id=536 data-nosnippet>536</a> InternalSnafu {
<a href=#537 id=537 data-nosnippet>537</a> <span class="comment">// this `err` will simply display `channel closed`
<a href=#538 id=538 data-nosnippet>538</a> </span>reason: <span class="macro">format!</span>(
<a href=#539 id=539 data-nosnippet>539</a> <span class="string">"Worker's receiver channel have been closed unexpected: {}"</span>,
<a href=#540 id=540 data-nosnippet>540</a> err
<a href=#541 id=541 data-nosnippet>541</a> ),
<a href=#542 id=542 data-nosnippet>542</a> }
<a href=#543 id=543 data-nosnippet>543</a> .build()
<a href=#544 id=544 data-nosnippet>544</a>}
<a href=#545 id=545 data-nosnippet>545</a>
<a href=#546 id=546 data-nosnippet>546</a><span class="attr">#[cfg(test)]
<a href=#547 id=547 data-nosnippet>547</a></span><span class="kw">mod </span>test {
<a href=#548 id=548 data-nosnippet>548</a> <span class="kw">use </span>tokio::sync::oneshot;
<a href=#549 id=549 data-nosnippet>549</a>
<a href=#550 id=550 data-nosnippet>550</a> <span class="kw">use super</span>::<span class="kw-2">*</span>;
<a href=#551 id=551 data-nosnippet>551</a> <span class="kw">use </span><span class="kw">crate</span>::expr::Id;
<a href=#552 id=552 data-nosnippet>552</a> <span class="kw">use </span><span class="kw">crate</span>::plan::Plan;
<a href=#553 id=553 data-nosnippet>553</a> <span class="kw">use </span><span class="kw">crate</span>::repr::RelationType;
<a href=#554 id=554 data-nosnippet>554</a>
<a href=#555 id=555 data-nosnippet>555</a> <span class="attr">#[test]
<a href=#556 id=556 data-nosnippet>556</a> </span><span class="kw">fn </span>drop_handle() {
<a href=#557 id=557 data-nosnippet>557</a> <span class="kw">let </span>(tx, rx) = oneshot::channel();
<a href=#558 id=558 data-nosnippet>558</a> <span class="kw">let </span>worker_thread_handle = std::thread::spawn(<span class="kw">move </span>|| {
<a href=#559 id=559 data-nosnippet>559</a> <span class="kw">let </span>(handle, <span class="kw-2">mut </span>worker) = create_worker();
<a href=#560 id=560 data-nosnippet>560</a> tx.send(handle).unwrap();
<a href=#561 id=561 data-nosnippet>561</a> worker.run();
<a href=#562 id=562 data-nosnippet>562</a> });
<a href=#563 id=563 data-nosnippet>563</a> <span class="kw">let </span>handle = rx.blocking_recv().unwrap();
<a href=#564 id=564 data-nosnippet>564</a> drop(handle);
<a href=#565 id=565 data-nosnippet>565</a> worker_thread_handle.join().unwrap();
<a href=#566 id=566 data-nosnippet>566</a> }
<a href=#567 id=567 data-nosnippet>567</a>
<a href=#568 id=568 data-nosnippet>568</a> <span class="attr">#[tokio::test]
<a href=#569 id=569 data-nosnippet>569</a> </span><span class="kw">pub async fn </span>test_simple_get_with_worker_and_handle() {
<a href=#570 id=570 data-nosnippet>570</a> <span class="kw">let </span>(tx, rx) = oneshot::channel();
<a href=#571 id=571 data-nosnippet>571</a> <span class="kw">let </span>worker_thread_handle = std::thread::spawn(<span class="kw">move </span>|| {
<a href=#572 id=572 data-nosnippet>572</a> <span class="kw">let </span>(handle, <span class="kw-2">mut </span>worker) = create_worker();
<a href=#573 id=573 data-nosnippet>573</a> tx.send(handle).unwrap();
<a href=#574 id=574 data-nosnippet>574</a> worker.run();
<a href=#575 id=575 data-nosnippet>575</a> });
<a href=#576 id=576 data-nosnippet>576</a> <span class="kw">let </span>handle = rx.<span class="kw">await</span>.unwrap();
<a href=#577 id=577 data-nosnippet>577</a> <span class="kw">let </span>src_ids = <span class="macro">vec!</span>[GlobalId::User(<span class="number">1</span>)];
<a href=#578 id=578 data-nosnippet>578</a> <span class="kw">let </span>(tx, rx) = broadcast::channel::&lt;Batch&gt;(<span class="number">1024</span>);
<a href=#579 id=579 data-nosnippet>579</a> <span class="kw">let </span>(sink_tx, <span class="kw-2">mut </span>sink_rx) = mpsc::unbounded_channel::&lt;Batch&gt;();
<a href=#580 id=580 data-nosnippet>580</a> <span class="kw">let </span>(flow_id, plan) = (
<a href=#581 id=581 data-nosnippet>581</a> <span class="number">1</span>,
<a href=#582 id=582 data-nosnippet>582</a> TypedPlan {
<a href=#583 id=583 data-nosnippet>583</a> plan: Plan::Get {
<a href=#584 id=584 data-nosnippet>584</a> id: Id::Global(GlobalId::User(<span class="number">1</span>)),
<a href=#585 id=585 data-nosnippet>585</a> },
<a href=#586 id=586 data-nosnippet>586</a> schema: RelationType::new(<span class="macro">vec!</span>[]).into_unnamed(),
<a href=#587 id=587 data-nosnippet>587</a> },
<a href=#588 id=588 data-nosnippet>588</a> );
<a href=#589 id=589 data-nosnippet>589</a> <span class="kw">let </span>create_reqs = Request::Create {
<a href=#590 id=590 data-nosnippet>590</a> flow_id,
<a href=#591 id=591 data-nosnippet>591</a> plan,
<a href=#592 id=592 data-nosnippet>592</a> sink_id: GlobalId::User(<span class="number">1</span>),
<a href=#593 id=593 data-nosnippet>593</a> sink_sender: sink_tx,
<a href=#594 id=594 data-nosnippet>594</a> source_ids: src_ids,
<a href=#595 id=595 data-nosnippet>595</a> src_recvs: <span class="macro">vec!</span>[rx],
<a href=#596 id=596 data-nosnippet>596</a> expire_after: <span class="prelude-val">None</span>,
<a href=#597 id=597 data-nosnippet>597</a> or_replace: <span class="bool-val">false</span>,
<a href=#598 id=598 data-nosnippet>598</a> create_if_not_exists: <span class="bool-val">true</span>,
<a href=#599 id=599 data-nosnippet>599</a> err_collector: ErrCollector::default(),
<a href=#600 id=600 data-nosnippet>600</a> };
<a href=#601 id=601 data-nosnippet>601</a> <span class="macro">assert_eq!</span>(
<a href=#602 id=602 data-nosnippet>602</a> handle.create_flow(create_reqs).<span class="kw">await</span>.unwrap(),
<a href=#603 id=603 data-nosnippet>603</a> <span class="prelude-val">Some</span>(flow_id)
<a href=#604 id=604 data-nosnippet>604</a> );
<a href=#605 id=605 data-nosnippet>605</a> tx.send(Batch::empty()).unwrap();
<a href=#606 id=606 data-nosnippet>606</a> handle.run_available(<span class="number">0</span>, <span class="bool-val">true</span>).<span class="kw">await</span>.unwrap();
<a href=#607 id=607 data-nosnippet>607</a> <span class="macro">assert_eq!</span>(handle.get_state_size().<span class="kw">await</span>.unwrap().len(), <span class="number">1</span>);
<a href=#608 id=608 data-nosnippet>608</a> <span class="macro">assert_eq!</span>(sink_rx.recv().<span class="kw">await</span>.unwrap(), Batch::empty());
<a href=#609 id=609 data-nosnippet>609</a> drop(handle);
<a href=#610 id=610 data-nosnippet>610</a> worker_thread_handle.join().unwrap();
<a href=#611 id=611 data-nosnippet>611</a> }
<a href=#612 id=612 data-nosnippet>612</a>}</code></pre></div></section></main></body></html>
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