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annotate src/main.ts @ 4:cd1b8d7bda78

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get metrics writing to victoriametrics
author drewp@bigasterisk.com
date Sat, 10 Aug 2024 21:16:19 -0700
parents 579df3a4e62d
children
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1
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1 import { LitElement, PropertyValues, TemplateResult, css, html } from "lit";
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2 import { customElement, property, state } from "lit/decorators.js";
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3
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4 type ConversionEvent = {
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5 message: {
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6 t: number;
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7 topic: string;
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8 payload: string;
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9 };
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10 metricEvent: {
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11 name: string;
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12 labels: {
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13 labelName: string;
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14 labelValue: string;
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15 }[];
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16 value: string;
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17 };
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18 };
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19
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20 @customElement("mm-page")
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21 export class MmPage extends LitElement {
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22 static styles = [
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23 css`
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24 :host {
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25 display: flex;
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26 flex-direction: column;
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27 min-height: 100vh;
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28 background: #121212;
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29 color: white;
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30 text-shadow: 0.6px 0.6px 0px #ffffff70;
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31 font-family: monospace;
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32 font-size: 135%;
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33 }
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34 `,
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35 ];
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36 @state() displayedMessages: ConversionEvent[] = [];
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37
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38 protected firstUpdated(_changedProperties: PropertyValues): void {
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39 super.firstUpdated(_changedProperties);
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40 new EventSource("api/debugEvents").addEventListener("message", (ev) => {
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41 this.displayedMessages.push(JSON.parse(ev.data));
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42 const maxShown = 20;
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43 if (this.displayedMessages.length > maxShown) {
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44 this.displayedMessages = this.displayedMessages.slice(-maxShown);
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45 }
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46 this.requestUpdate();
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47 });
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48 }
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49
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50 render() {
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51 return html`
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52 <h1>Mqtt metrics</h1>
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53
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54 ${this.displayedMessages.map((ev) => html`<mm-conversion-event .ev=${ev}></mm-conversion-event>`)}
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55 <p><a href="metrics">metrics</a> |</p>
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56 <bigast-loginbar></bigast-loginbar>
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57 `;
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58 }
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59 }
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60
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61 @customElement("mm-conversion-event")
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62 export class MmConversionEvent extends LitElement {
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63 static styles = [
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64 css`
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65 div.message {
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66 color: #888;
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67 margin-bottom: 1em;
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68 }
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69 .msgKey {
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70 color: #006699;
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71 padding-left: 1em;
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72 }
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73 .msgValue {
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74 color: #ff4500;
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75 }
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76 .metricName {
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77 color: #008000;
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78 }
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79 .metricLabelName {
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80 color: #9400d3;
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81 }
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82 .metricLabelValue {
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83 color: #ffc125;
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84 }
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85 .metricValue {
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86 color: #4169e1;
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87 }
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88 `,
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89 ];
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90 @property() ev?: ConversionEvent;
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91 render() {
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92 if (!this.ev) return html``;
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93 const ev = this.ev;
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94 const t = new Date(ev.message.t * 1000);
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95 return html`<div class="message">
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96 <div>
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97 Incoming mqtt message:
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98 <span class="msgKey">t</span>=<span class="msgValue"> ${t.toLocaleString("sv")} </span> <span class="msgKey">topic</span>=<span class="msgValue"
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99 >${ev.message.topic}</span
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100 >
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101 <span class="msgKey">payload</span>=<span class="msgValue">${ev.message.payload}</span>
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102 </div>
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103 <div>
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104 Converted to metric:
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105 <span class="metricName">${ev.metricEvent.name}</span>
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106
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107 {${ev.metricEvent.labels.map(
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108 (l, i) => html`
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109 <span class="metricLabelName">${l.labelName}</span>=<span class="metricLabelValue">${l.labelValue}</span>
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110
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111 ${i < ev.metricEvent.labels.length - 1 ? "," : "}"}
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112 `
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113 )}
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114 value=<span class="metricValue">${ev.metricEvent.value}</span>
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115 </div>
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116 </div>`;
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117 }
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118 }