use factory instead of startWorker

3 files changed, 76 insertions, 61 deletions

diff --git a/src/crypto/cryptoApi-test.ts b/src/crypto/cryptoApi-test.ts
index 6d43e2e6e..9c592412e 100644
--- a/src/crypto/cryptoApi-test.ts
+++ b/src/crypto/cryptoApi-test.ts
@@ -24,7 +24,7 @@ import {
   ReserveRecord,
 } from "../dbTypes";
 
-import { CryptoApi } from "./cryptoApi";
+import { CryptoApi, NodeCryptoWorkerFactory } from "./cryptoApi";
 
 const masterPub1: string =
   "CQQZ9DY3MZ1ARMN5K1VKDETS04Y2QCKMMCFHZSWJWWVN82BTTH00";
@@ -73,7 +73,7 @@ const denomInvalid1 = JSON.parse(JSON.stringify(denomValid1));
 denomInvalid1.value.value += 1;
 
 test("string hashing", async t => {
-  const crypto = new CryptoApi();
+  const crypto = new CryptoApi(new NodeCryptoWorkerFactory());
   const s = await crypto.hashString("hello taler");
   const sh =
     "8RDMADB3YNF3QZBS3V467YZVJAMC2QAQX0TZGVZ6Q5PFRRAJFT70HHN0QF661QR9QWKYMMC7YEMPD679D2RADXCYK8Y669A2A5MKQFR";
@@ -82,7 +82,7 @@ test("string hashing", async t => {
 });
 
 test("precoin creation", async t => {
-  const crypto = new CryptoApi();
+  const crypto = new CryptoApi(new NodeCryptoWorkerFactory());
   const { priv, pub } = await crypto.createEddsaKeypair();
   const r: ReserveRecord = {
     created: 0,
@@ -103,7 +103,7 @@ test("precoin creation", async t => {
 });
 
 test("denom validation", async t => {
-  const crypto = new CryptoApi();
+  const crypto = new CryptoApi(new NodeCryptoWorkerFactory());
   let v: boolean;
   v = await crypto.isValidDenom(denomValid1, masterPub1);
   t.true(v);
diff --git a/src/crypto/cryptoApi.ts b/src/crypto/cryptoApi.ts
index 5e3237836..accebd651 100644
--- a/src/crypto/cryptoApi.ts
+++ b/src/crypto/cryptoApi.ts
@@ -39,9 +39,7 @@ import { ContractTerms, PaybackRequest } from "../talerTypes";
 import { BenchmarkResult, CoinWithDenom, PayCoinInfo } from "../walletTypes";
 
 import * as timer from "../timer";
-
-import { startWorker } from "./startWorker";
-import { throws } from "assert";
+import { string } from "prop-types";
 
 /**
  * State of a crypto worker.
@@ -50,7 +48,7 @@ interface WorkerState {
   /**
    * The actual worker thread.
    */
-  w: Worker | null;
+  w: CryptoWorker | null;
 
   /**
    * Work we're currently executing or null if not busy.
@@ -86,6 +84,67 @@ interface WorkItem {
  */
 const NUM_PRIO = 5;
 
+interface CryptoWorker {
+  postMessage(message: any): void;
+
+  terminate(): void;
+
+  onmessage: (m: any) => void;
+  onerror: (m: any) => void;
+}
+
+export interface CryptoWorkerFactory {
+  /**
+   * Start a new worker.
+   */
+  startWorker(): CryptoWorker;
+
+  /**
+   * Query the number of workers that should be
+   * run at the same time.
+   */
+  getConcurrency(): number
+}
+
+
+export class NodeCryptoWorkerFactory implements CryptoWorkerFactory {
+  startWorker(): CryptoWorker {
+    if (typeof require === "undefined") {
+      throw Error("cannot make worker, require(...) not defined");
+    }
+    const workerCtor = require("./nodeWorker").Worker;
+    const workerPath = __dirname + "/cryptoWorker.js";
+    return new workerCtor(workerPath);
+  }
+  
+  getConcurrency(): number {
+    return 2;
+  }
+}
+
+
+export class BrowserCryptoWorkerFactory implements CryptoWorkerFactory {
+  startWorker(): CryptoWorker {
+    const workerCtor = Worker;
+    const workerPath = "/dist/cryptoWorker-bundle.js";
+    return new workerCtor(workerPath) as CryptoWorker;
+  }
+  
+  getConcurrency(): number {
+    let concurrency = 2;
+    try {
+      // only works in the browser
+      // tslint:disable-next-line:no-string-literal
+      concurrency = (navigator as any)["hardwareConcurrency"];
+      concurrency = Math.max(1, Math.ceil(concurrency / 2));
+    } catch (e) {
+      concurrency = 2;
+    }
+    return concurrency;
+  }
+}
+
+
 /**
  * Crypto API that interfaces manages a background crypto thread
  * for the execution of expensive operations.
@@ -94,6 +153,9 @@ export class CryptoApi {
   private nextRpcId: number = 1;
   private workers: WorkerState[];
   private workQueues: WorkItem[][];
+
+  private workerFactory: CryptoWorkerFactory;
+
   /**
    * Number of busy workers.
    */
@@ -106,6 +168,7 @@ export class CryptoApi {
 
   public enableTracing = false;
 
+
   /**
    * Terminate all worker threads.
    */
@@ -146,7 +209,7 @@ export class CryptoApi {
     ws.currentWorkItem = work;
     this.numBusy++;
     if (!ws.w) {
-      const w = startWorker();
+      const w = this.workerFactory.startWorker();
       w.onmessage = (m: MessageEvent) => this.handleWorkerMessage(ws, m);
       w.onerror = (e: ErrorEvent) => this.handleWorkerError(ws, e);
       ws.w = w;
@@ -239,17 +302,9 @@ export class CryptoApi {
     currentWorkItem.resolve(msg.data.result);
   }
 
-  constructor() {
-    let concurrency = 2;
-    try {
-      // only works in the browser
-      // tslint:disable-next-line:no-string-literal
-      concurrency = (navigator as any)["hardwareConcurrency"];
-      concurrency = Math.max(1, Math.ceil(concurrency / 2));
-    } catch (e) {
-      // ignore
-    }
-    this.workers = new Array<WorkerState>(concurrency);
+  constructor(workerFactory: CryptoWorkerFactory) {
+    this.workerFactory = workerFactory;
+    this.workers = new Array<WorkerState>(workerFactory.getConcurrency());
 
     for (let i = 0; i < this.workers.length; i++) {
       this.workers[i] = {
@@ -258,6 +313,7 @@ export class CryptoApi {
         w: null,
       };
     }
+
     this.workQueues = [];
     for (let i = 0; i < NUM_PRIO; i++) {
       this.workQueues.push([]);
diff --git a/src/crypto/startWorker.js b/src/crypto/startWorker.js
deleted file mode 100644
index a64152c64..000000000
--- a/src/crypto/startWorker.js
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- This file is part of TALER
- (C) 2017 Inria and 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/>
- */
-
-
-// @ts-nocheck
-
-
-/**
- * Start a crypto worker, using different worker
- * mechanisms depending on the environment.
- *
- * @returns {Worker}
- */
-export function startWorker() {
-  let workerCtor;
-  let workerPath;
-  if (typeof Worker !== "undefined") {
-    // we're in the browser
-    workerCtor = Worker;
-    workerPath = "/dist/cryptoWorker-bundle.js";
-  } else if (typeof "require" !== "undefined") {
-    workerCtor = require("./nodeWorker").Worker;
-    workerPath = __dirname + "/cryptoWorker.js";
-  } else {
-    throw Error("Can't create worker, unknown environment");
-  }
-  return new workerCtor(workerPath);
-}