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1 | /**
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2 | * trace-event - A library to create a trace of your node app per
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3 | * Google's Trace Event format:
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4 | * // JSSTYLED
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5 | * https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU
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6 | */
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7 | /// <reference types="node" />
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8 | import { Readable as ReadableStream } from "stream";
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9 | export interface Event {
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10 | ts: number;
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11 | pid: number;
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12 | tid: number;
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13 | /** event phase */
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14 | ph?: string;
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15 | [otherData: string]: any;
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16 | }
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17 | export interface Fields {
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18 | cat?: any;
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19 | args?: any;
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20 | [filedName: string]: any;
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21 | }
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22 | export interface TracerOptions {
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23 | parent?: Tracer | null;
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24 | fields?: Fields | null;
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25 | objectMode?: boolean | null;
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26 | noStream?: boolean;
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27 | }
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28 | export declare class Tracer extends ReadableStream {
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29 | private _objectMode;
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30 | /** Node Stream internal APIs */
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31 | private _push;
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32 | private firstPush?;
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33 | private noStream;
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34 | private events;
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35 | private parent;
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36 | private fields;
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37 | constructor(opts?: TracerOptions);
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38 | /**
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39 | * If in no streamMode in order to flush out the trace
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40 | * you need to call flush.
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41 | */
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42 | flush(): void;
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43 | _read(_: number): void;
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44 | private _pushString;
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45 | private _flush;
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46 | child(fields: Fields): Tracer;
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47 | begin(fields: Fields): void;
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48 | end(fields: Fields): void;
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49 | completeEvent(fields: Fields): void;
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50 | instantEvent(fields: Fields): void;
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51 | mkEventFunc(ph: string): (fields: Fields) => void;
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52 | }
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