fix(simulator): ensure configuration file reload will restart the

[e-mobility-charging-stations-simulator.git] / src / utils / AsyncLock.ts

diff --git a/src/utils/AsyncLock.ts b/src/utils/AsyncLock.ts
index f00ee5681b7b0cf760d867458fa51191df3269b9..fe984cebdef97d8043d0f29f6fb9ba99ec502f3c 100644 (file)
--- a/src/utils/AsyncLock.ts
+++ b/src/utils/AsyncLock.ts
@@ -1,6 +1,8 @@
 // Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
 
-import { Queue } from './Queue';
+import Queue from 'mnemonist/queue.js';
+
+import { Constants } from './Constants';
 
 export enum AsyncLockType {
   configuration = 'configuration',
@@ -19,25 +21,33 @@ export class AsyncLock {
     this.resolveQueue = new Queue<ResolveType>();
   }
 
-  public static async acquire(type: AsyncLockType): Promise<void> {
+  public static async runExclusive<T>(type: AsyncLockType, fn: () => T | Promise<T>): Promise<T> {
+    return AsyncLock.acquire(type)
+      .then(fn)
+      .finally(() => {
+        AsyncLock.release(type).catch(Constants.EMPTY_FUNCTION);
+      });
+  }
+
+  private static async acquire(type: AsyncLockType): Promise<void> {
     const asyncLock = AsyncLock.getAsyncLock(type);
     if (!asyncLock.acquired) {
       asyncLock.acquired = true;
       return;
     }
-    return new Promise((resolve) => {
+    return new Promise<void>((resolve) => {
       asyncLock.resolveQueue.enqueue(resolve);
     });
   }
 
-  public static async release(type: AsyncLockType): Promise<void> {
+  private static async release(type: AsyncLockType): Promise<void> {
     const asyncLock = AsyncLock.getAsyncLock(type);
     if (asyncLock.resolveQueue.size === 0 && asyncLock.acquired) {
       asyncLock.acquired = false;
       return;
     }
-    const queuedResolve = asyncLock.resolveQueue.dequeue();
-    return new Promise((resolve) => {
+    const queuedResolve = asyncLock.resolveQueue.dequeue()!;
+    return new Promise<void>((resolve) => {
       queuedResolve();
       resolve();
     });
@@ -47,6 +57,6 @@ export class AsyncLock {
     if (!AsyncLock.asyncLocks.has(type)) {
       AsyncLock.asyncLocks.set(type, new AsyncLock());
     }
-    return AsyncLock.asyncLocks.get(type);
+    return AsyncLock.asyncLocks.get(type)!;
   }
 }