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<a href="index.html">All files</a> ProcessFork.ts
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<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Statements</span>
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Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
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<span class="cline-any cline-yes">1x</span></td><td class="text"><pre class="prettyprint lang-js">import { Processor, ProcessLineResult } from "./Processor";
import P from "bluebird"
import { Converter } from "./Converter";
import { ChildProcess } from "child_process";
import { CSVParseParam, mergeParams } from "./Parameters";
import { ParseRuntime } from "./ParseRuntime";
import { Readable, Writable } from "stream";
import { bufFromString, emptyBuffer } from "./util";
import CSVError from "./CSVError";
&nbsp;
export class ProcessorFork extends Processor {
flush(): P&lt;ProcessLineResult[]&gt; {
return new P((resolve, reject) =&gt; {
// console.log("flush");
this.finalChunk = true;
this.next = resolve;
this.childProcess.stdin.end();
});
}
destroy(): P&lt;void&gt; {
this.childProcess.kill();
return P.resolve();
}
childProcess: ChildProcess;
inited: boolean = false;
private resultBuf: ProcessLineResult[] = [];
private leftChunk: string = "";
private finalChunk: boolean = false;
private next?: (result: ProcessLineResult[]) =&gt; any;
constructor(protected converter: Converter) {
super(converter);
this.childProcess = require("child_process").spawn(process.execPath, [__dirname + "/../v2/worker.js"], {
stdio: ["pipe", "pipe", "pipe", "ipc"]
});
this.initWorker();
}
private prepareParam(param:CSVParseParam):any{
const clone:any=mergeParams(param);
if (clone.ignoreColumns){
clone.ignoreColumns={
source:clone.ignoreColumns.source,
flags:clone.ignoreColumns.flags
}
}
if (clone.includeColumns){
clone.includeColumns={
source:clone.includeColumns.source,
flags:clone.includeColumns.flags
}
}
return clone;
}
private initWorker() {
this.childProcess.send({
cmd: "init",
params: this.prepareParam(this.converter.parseParam)
} as InitMessage);
this.childProcess.on("message", (msg: Message) =&gt; {
if (msg.cmd === "inited") {
this.inited = true;
} else if (msg.cmd === "eol") {
if (this.converter.listeners("eol").length &gt; 0){
this.converter.emit("eol",(msg as StringMessage).value);
}
}else if (msg.cmd === "header") {
if (this.converter.listeners("header").length &gt; 0){
this.converter.emit("header",(msg as StringMessage).value);
}
}else <span class="missing-if-branch" title="else path not taken" >E</span>if (msg.cmd === "done"){
&nbsp;
this.flushResult();
}
&nbsp;
});
this.childProcess.stdout.on("data", (data) =&gt; {
// console.log("stdout", data.toString());
const res = data.toString();
this.appendBuf(res);
&nbsp;
});
this.childProcess.stderr.on("data", (data) =&gt; {
// console.log("stderr", data.toString());
this.converter.emit("error", CSVError.fromJSON(JSON.parse(data.toString())));
});
&nbsp;
}
private flushResult() {
// console.log("flush result", this.resultBuf.length);
<span class="missing-if-branch" title="else path not taken" >E</span>if (this.next) {
this.next(this.resultBuf);
}
this.resultBuf = [];
}
private appendBuf(data: string) {
const res = this.leftChunk + data;
const list = res.split("\n");
let counter = 0;
const lastBit = list[list.length - 1];
if (lastBit !== "") {
this.leftChunk = list.pop() || <span class="branch-1 cbranch-no" title="branch not covered" >"";</span>
} else {
this.leftChunk = "";
}
&nbsp;
while (list.length) {
let item = list.shift() || "";
if (item.length === 0 ) {
continue;
}
<span class="missing-if-branch" title="else path not taken" >E</span>if (this.params.output !== "line") {
item = JSON.parse(item);
}
this.resultBuf.push(item);
counter++;
}
}
&nbsp;
process(chunk: Buffer): P&lt;ProcessLineResult[]&gt; {
return new P((resolve, reject) =&gt; {
// console.log("chunk", chunk.length);
this.next = resolve;
// this.appendReadBuf(chunk);
this.childProcess.stdin.write(chunk, () =&gt; {
// console.log("chunk callback");
this.flushResult();
});
});
}
}
&nbsp;
export interface Message {
cmd: string
}
&nbsp;
export interface InitMessage extends Message {
params: any;
}
export interface StringMessage extends Message {
value: string
}
export const EOM = "\x03";</pre></td></tr>
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