-// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
+// Partial Copyright Jerome Benoit. 2021-2024. All Rights Reserved.
-import Queue from 'mnemonist/queue.js';
+import { Queue } from 'mnemonist'
-import { Constants } from './Constants';
+import { Constants } from './Constants.js'
export enum AsyncLockType {
configuration = 'configuration',
- performance = 'performance',
+ performance = 'performance'
}
-type ResolveType = (value: void | PromiseLike<void>) => void;
+type ResolveType = (value: void | PromiseLike<void>) => void
export class AsyncLock {
- private static readonly asyncLocks = new Map<AsyncLockType, AsyncLock>();
- private acquired: boolean;
- private readonly resolveQueue: Queue<ResolveType>;
+ private static readonly asyncLocks = new Map<AsyncLockType, AsyncLock>()
+ private acquired: boolean
+ private readonly resolveQueue: Queue<ResolveType>
- private constructor() {
- this.acquired = false;
- this.resolveQueue = new Queue<ResolveType>();
+ private constructor () {
+ this.acquired = false
+ this.resolveQueue = new Queue<ResolveType>()
}
public static async runExclusive<T>(type: AsyncLockType, fn: () => T | Promise<T>): Promise<T> {
- return AsyncLock.acquire(type)
+ return await AsyncLock.acquire(type)
.then(fn)
.finally(() => {
- AsyncLock.release(type).catch(Constants.EMPTY_FUNCTION);
- });
+ AsyncLock.release(type).catch(Constants.EMPTY_FUNCTION)
+ })
}
- private static async acquire(type: AsyncLockType): Promise<void> {
- const asyncLock = AsyncLock.getAsyncLock(type);
+ private static async acquire (type: AsyncLockType): Promise<void> {
+ const asyncLock = AsyncLock.getAsyncLock(type)
if (!asyncLock.acquired) {
- asyncLock.acquired = true;
- return;
+ asyncLock.acquired = true
+ return
}
- return new Promise<void>((resolve) => {
- asyncLock.resolveQueue.enqueue(resolve);
- });
+ await new Promise<void>(resolve => {
+ asyncLock.resolveQueue.enqueue(resolve)
+ })
}
- private static async release(type: AsyncLockType): Promise<void> {
- const asyncLock = AsyncLock.getAsyncLock(type);
+ private static async release (type: AsyncLockType): Promise<void> {
+ const asyncLock = AsyncLock.getAsyncLock(type)
if (asyncLock.resolveQueue.size === 0 && asyncLock.acquired) {
- asyncLock.acquired = false;
- return;
+ asyncLock.acquired = false
+ return
}
- const queuedResolve = asyncLock.resolveQueue.dequeue()!;
- return new Promise<void>((resolve) => {
- queuedResolve();
- resolve();
- });
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ const queuedResolve = asyncLock.resolveQueue.dequeue()!
+ await new Promise<void>(resolve => {
+ queuedResolve()
+ resolve()
+ })
}
- private static getAsyncLock(type: AsyncLockType): AsyncLock {
+ private static getAsyncLock (type: AsyncLockType): AsyncLock {
if (!AsyncLock.asyncLocks.has(type)) {
- AsyncLock.asyncLocks.set(type, new AsyncLock());
+ AsyncLock.asyncLocks.set(type, new AsyncLock())
}
- return AsyncLock.asyncLocks.get(type)!;
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ return AsyncLock.asyncLocks.get(type)!
}
}