Merge branch 'master' into interleaved-weighted-round-robin-worker-choice-strategy

[poolifier.git] / src / pools / selection-strategies / worker-choice-strategy-context.ts

diff --git a/src/pools/selection-strategies/worker-choice-strategy-context.ts b/src/pools/selection-strategies/worker-choice-strategy-context.ts
index 9a7bb81bd0d83259e9c6b33e86bad7676982eb83..0d0d269c076537bd2018cc4cc9450ea43584a6b8 100644 (file)
--- a/src/pools/selection-strategies/worker-choice-strategy-context.ts
+++ b/src/pools/selection-strategies/worker-choice-strategy-context.ts
@@ -2,6 +2,7 @@ import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
 import type { IPool } from '../pool'
 import type { IWorker } from '../worker'
 import { FairShareWorkerChoiceStrategy } from './fair-share-worker-choice-strategy'
+import { InterleavedWeightedRoundRobinWorkerChoiceStrategy } from './interleaved-weighted-round-robin-worker-choice-strategy'
 import { LessBusyWorkerChoiceStrategy } from './less-busy-worker-choice-strategy'
 import { LessUsedWorkerChoiceStrategy } from './less-used-worker-choice-strategy'
 import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
@@ -40,39 +41,57 @@ export class WorkerChoiceStrategyContext<
    */
   public constructor (
     pool: IPool<Worker, Data, Response>,
-    /**
-     * @defaultValue WorkerChoiceStrategies.ROUND_ROBIN
-     */
     private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN,
     opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
   ) {
-    this.execute.bind(this)
+    this.execute = this.execute.bind(this)
     this.workerChoiceStrategies = new Map<
     WorkerChoiceStrategy,
     IWorkerChoiceStrategy
     >([
       [
         WorkerChoiceStrategies.ROUND_ROBIN,
-        new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+        new (RoundRobinWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
       ],
       [
         WorkerChoiceStrategies.LESS_USED,
-        new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+        new (LessUsedWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
       ],
       [
         WorkerChoiceStrategies.LESS_BUSY,
-        new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+        new (LessBusyWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
       ],
       [
         WorkerChoiceStrategies.FAIR_SHARE,
-        new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
-      ],
-      [
-        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN,
-        new WeightedRoundRobinWorkerChoiceStrategy<Worker, Data, Response>(
+        new (FairShareWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
           pool,
           opts
         )
+      ],
+      [
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN,
+        new (WeightedRoundRobinWorkerChoiceStrategy.bind(this))<
+        Worker,
+        Data,
+        Response
+        >(pool, opts)
+      ],
+      [
+        WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN,
+        new (InterleavedWeightedRoundRobinWorkerChoiceStrategy.bind(this))<
+        Worker,
+        Data,
+        Response
+        >(pool, opts)
       ]
     ])
   }
@@ -104,21 +123,39 @@ export class WorkerChoiceStrategyContext<
     this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset()
   }
 
+  /**
+   * Updates the worker node key in the worker choice strategy internals in the context.
+   *
+   * @returns `true` if the update is successful, `false` otherwise.
+   */
+  public update (workerNodeKey: number): boolean {
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategy
+      ) as IWorkerChoiceStrategy
+    ).update(workerNodeKey)
+  }
+
   /**
    * Executes the worker choice strategy algorithm in the context.
    *
    * @returns The key of the worker node.
+   * @throws {@link https://nodejs.org/api/errors.html#class-error} If the worker node key is null or undefined.
    */
   public execute (): number {
-    return (
+    const workerNodeKey = (
       this.workerChoiceStrategies.get(
         this.workerChoiceStrategy
       ) as IWorkerChoiceStrategy
     ).choose()
+    if (workerNodeKey == null) {
+      throw new Error('Worker node key chosen is null or undefined')
+    }
+    return workerNodeKey
   }
 
   /**
-   * Removes a worker node key from the worker choice strategy in the context.
+   * Removes the worker node key from the worker choice strategy in the context.
    *
    * @param workerNodeKey - The key of the worker node.
    * @returns `true` if the removal is successful, `false` otherwise.
@@ -137,8 +174,8 @@ export class WorkerChoiceStrategyContext<
    * @param opts - The worker choice strategy options.
    */
   public setOptions (opts: WorkerChoiceStrategyOptions): void {
-    this.workerChoiceStrategies.forEach(workerChoiceStrategy => {
+    for (const workerChoiceStrategy of this.workerChoiceStrategies.values()) {
       workerChoiceStrategy.setOptions(opts)
-    })
+    }
   }
 }