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import { CryptoWorkerFactory } from "./cryptoApi";
/*
This file is part of TALER
(C) 2016 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
// tslint:disable:no-var-requires
import { CryptoWorker } from "./cryptoWorker";
import path = require("path");
import child_process = require("child_process");
const nodeWorkerEntry = path.join(__dirname, "nodeWorkerEntry.js");
export class NodeCryptoWorkerFactory implements CryptoWorkerFactory {
startWorker(): CryptoWorker {
if (typeof require === "undefined") {
throw Error("cannot make worker, require(...) not defined");
}
const workerCtor = require("./nodeProcessWorker").Worker;
const workerPath = __dirname + "/cryptoWorker.js";
return new workerCtor(workerPath);
}
getConcurrency(): number {
return 4;
}
}
/**
* Worker implementation that uses node subprocesses.
*/
export class Worker {
private child: any;
/**
* Function to be called when we receive a message from the worker thread.
*/
onmessage: undefined | ((m: any) => void);
/**
* Function to be called when we receive an error from the worker thread.
*/
onerror: undefined | ((m: any) => void);
private dispatchMessage(msg: any) {
if (this.onmessage) {
this.onmessage({ data: msg });
} else {
console.warn("no handler for worker event 'message' defined")
}
}
private dispatchError(msg: any) {
if (this.onerror) {
this.onerror({ data: msg });
} else {
console.warn("no handler for worker event 'error' defined")
}
}
constructor() {
this.child = child_process.fork(nodeWorkerEntry);
this.onerror = undefined;
this.onmessage = undefined;
this.child.on("error", (e: any) => {
this.dispatchError(e);
});
this.child.on("message", (msg: any) => {
console.log("nodeProcessWorker got child message", msg);
this.dispatchMessage(msg);
});
}
/**
* Add an event listener for either an "error" or "message" event.
*/
addEventListener(event: "message" | "error", fn: (x: any) => void): void {
switch (event) {
case "message":
this.onmessage = fn;
break;
case "error":
this.onerror = fn;
break;
}
}
/**
* Send a message to the worker thread.
*/
postMessage (msg: any) {
this.child.send(JSON.stringify({data: msg}));
}
/**
* Forcibly terminate the worker thread.
*/
terminate () {
console.log("terminating node.js worker");
this.child.kill("SIGINT");
}
}
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