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author | Florian Dold <florian@dold.me> | 2021-06-17 15:49:05 +0200 |
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committer | Florian Dold <florian@dold.me> | 2021-06-17 15:49:05 +0200 |
commit | a70d37ef1675b53241f707c6730fab1537bd9d24 (patch) | |
tree | 5493e11884c9071efda9a8f4680e3787c6cdf0a5 /packages/taler-wallet-core/src/operations/state.ts | |
parent | 453656b240c7e8771068ab877b6f5c9e3a26a4dc (diff) | |
download | wallet-core-a70d37ef1675b53241f707c6730fab1537bd9d24.tar.gz wallet-core-a70d37ef1675b53241f707c6730fab1537bd9d24.tar.bz2 wallet-core-a70d37ef1675b53241f707c6730fab1537bd9d24.zip |
towards factoring out cyclic dependencies
Diffstat (limited to 'packages/taler-wallet-core/src/operations/state.ts')
-rw-r--r-- | packages/taler-wallet-core/src/operations/state.ts | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/packages/taler-wallet-core/src/operations/state.ts b/packages/taler-wallet-core/src/operations/state.ts deleted file mode 100644 index ee7ceb8af..000000000 --- a/packages/taler-wallet-core/src/operations/state.ts +++ /dev/null @@ -1,148 +0,0 @@ -/* - This file is part of GNU Taler - (C) 2019 GNUnet e.V. - - GNU 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. - - GNU 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 - GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> - */ - -/** - * Imports. - */ -import { - WalletNotification, - BalancesResponse, - Logger, -} from "@gnu-taler/taler-util"; -import { CryptoApi, CryptoWorkerFactory } from "../crypto/workers/cryptoApi.js"; -import { WalletStoresV1 } from "../db.js"; -import { PendingOperationsResponse } from "../pending-types.js"; -import { AsyncOpMemoMap, AsyncOpMemoSingle } from "../util/asyncMemo.js"; -import { HttpRequestLibrary } from "../util/http"; -import { - AsyncCondition, - OpenedPromise, - openPromise, -} from "../util/promiseUtils.js"; -import { DbAccess } from "../util/query.js"; -import { TimerGroup } from "../util/timer.js"; - -type NotificationListener = (n: WalletNotification) => void; - -const logger = new Logger("state.ts"); - -export const EXCHANGE_COINS_LOCK = "exchange-coins-lock"; -export const EXCHANGE_RESERVES_LOCK = "exchange-reserves-lock"; - -/** - * Internal state of the wallet. - */ -export class InternalWalletState { - memoProcessReserve: AsyncOpMemoMap<void> = new AsyncOpMemoMap(); - memoMakePlanchet: AsyncOpMemoMap<void> = new AsyncOpMemoMap(); - memoGetPending: AsyncOpMemoSingle<PendingOperationsResponse> = new AsyncOpMemoSingle(); - memoGetBalance: AsyncOpMemoSingle<BalancesResponse> = new AsyncOpMemoSingle(); - memoProcessRefresh: AsyncOpMemoMap<void> = new AsyncOpMemoMap(); - memoProcessRecoup: AsyncOpMemoMap<void> = new AsyncOpMemoMap(); - memoProcessDeposit: AsyncOpMemoMap<void> = new AsyncOpMemoMap(); - cryptoApi: CryptoApi; - - timerGroup: TimerGroup = new TimerGroup(); - latch = new AsyncCondition(); - stopped = false; - memoRunRetryLoop = new AsyncOpMemoSingle<void>(); - - listeners: NotificationListener[] = []; - - initCalled: boolean = false; - - /** - * Promises that are waiting for a particular resource. - */ - private resourceWaiters: Record<string, OpenedPromise<void>[]> = {}; - - /** - * Resources that are currently locked. - */ - private resourceLocks: Set<string> = new Set(); - - constructor( - // FIXME: Make this a getter and make - // the actual value nullable. - // Check if we are in a DB migration / garbage collection - // and throw an error in that case. - public db: DbAccess<typeof WalletStoresV1>, - public http: HttpRequestLibrary, - cryptoWorkerFactory: CryptoWorkerFactory, - ) { - this.cryptoApi = new CryptoApi(cryptoWorkerFactory); - } - - notify(n: WalletNotification): void { - logger.trace("Notification", n); - for (const l of this.listeners) { - const nc = JSON.parse(JSON.stringify(n)); - setTimeout(() => { - l(nc); - }, 0); - } - } - - addNotificationListener(f: (n: WalletNotification) => void): void { - this.listeners.push(f); - } - - /** - * Stop ongoing processing. - */ - stop(): void { - this.stopped = true; - this.timerGroup.stopCurrentAndFutureTimers(); - this.cryptoApi.stop(); - } - - /** - * Run an async function after acquiring a list of locks, identified - * by string tokens. - */ - async runSequentialized<T>(tokens: string[], f: () => Promise<T>) { - // Make sure locks are always acquired in the same order - tokens = [...tokens].sort(); - - for (const token of tokens) { - if (this.resourceLocks.has(token)) { - const p = openPromise<void>(); - let waitList = this.resourceWaiters[token]; - if (!waitList) { - waitList = this.resourceWaiters[token] = []; - } - waitList.push(p); - await p.promise; - } - this.resourceLocks.add(token); - } - - try { - logger.trace(`begin exclusive execution on ${JSON.stringify(tokens)}`); - const result = await f(); - logger.trace(`end exclusive execution on ${JSON.stringify(tokens)}`); - return result; - } finally { - for (const token of tokens) { - this.resourceLocks.delete(token); - let waiter = (this.resourceWaiters[token] ?? []).shift(); - if (waiter) { - waiter.resolve(); - } - } - } - } -} |