X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Fworker-choice-strategy-context.ts;h=3d32dad68eee8b700a6aed3b2a4811876d978427;hb=a788de39a01b042deb0707c2e92af99181b933d2;hp=8041e2f6577b7ca046c6e51048ed2a7d873923db;hpb=ccd49f039d24ec1590b2b32ff1738c80fae743e5;p=poolifier.git

diff --git a/src/pools/selection-strategies/worker-choice-strategy-context.ts b/src/pools/selection-strategies/worker-choice-strategy-context.ts
index 8041e2f6..3d32dad6 100644
--- a/src/pools/selection-strategies/worker-choice-strategy-context.ts
+++ b/src/pools/selection-strategies/worker-choice-strategy-context.ts
@@ -1,50 +1,112 @@
-import type { IPoolInternal } from '../pool-internal'
-import type { IPoolWorker } from '../pool-worker'
+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 { LeastBusyWorkerChoiceStrategy } from './least-busy-worker-choice-strategy'
+import { LeastUsedWorkerChoiceStrategy } from './least-used-worker-choice-strategy'
+import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
 import type {
   IWorkerChoiceStrategy,
-  RequiredStatistics,
-  WorkerChoiceStrategy
+  TaskStatistics,
+  WorkerChoiceStrategy,
+  WorkerChoiceStrategyOptions
 } from './selection-strategies-types'
 import { WorkerChoiceStrategies } from './selection-strategies-types'
-import { getWorkerChoiceStrategy } from './selection-strategies-utils'
+import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy'
 
 /**
  * The worker choice strategy context.
  *
  * @typeParam Worker - Type of worker.
  * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
- * @typeParam Response - Type of response of execution. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
  */
 export class WorkerChoiceStrategyContext<
-  Worker extends IPoolWorker,
-  Data,
-  Response
+  Worker extends IWorker,
+  Data = unknown,
+  Response = unknown
 > {
-  private workerChoiceStrategy!: IWorkerChoiceStrategy
+  private readonly workerChoiceStrategies: Map<
+  WorkerChoiceStrategy,
+  IWorkerChoiceStrategy
+  >
 
   /**
    * Worker choice strategy context constructor.
    *
    * @param pool - The pool instance.
-   * @param createWorkerCallback - The worker creation callback for dynamic pool.
    * @param workerChoiceStrategy - The worker choice strategy.
+   * @param opts - The worker choice strategy options.
    */
   public constructor (
-    private readonly pool: IPoolInternal<Worker, Data, Response>,
-    private readonly createWorkerCallback: () => number,
-    workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
+    pool: IPool<Worker, Data, Response>,
+    private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN,
+    opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
   ) {
-    this.execute.bind(this)
-    this.setWorkerChoiceStrategy(workerChoiceStrategy)
+    this.execute = this.execute.bind(this)
+    this.workerChoiceStrategies = new Map<
+    WorkerChoiceStrategy,
+    IWorkerChoiceStrategy
+    >([
+      [
+        WorkerChoiceStrategies.ROUND_ROBIN,
+        new (RoundRobinWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
+      ],
+      [
+        WorkerChoiceStrategies.LEAST_USED,
+        new (LeastUsedWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
+      ],
+      [
+        WorkerChoiceStrategies.LEAST_BUSY,
+        new (LeastBusyWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
+      ],
+      [
+        WorkerChoiceStrategies.FAIR_SHARE,
+        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)
+      ]
+    ])
   }
 
   /**
-   * Gets the worker choice strategy required statistics.
+   * Gets the worker choice strategy task statistics in the context.
    *
-   * @returns The required statistics.
+   * @returns The task statistics.
    */
-  public getRequiredStatistics (): RequiredStatistics {
-    return this.workerChoiceStrategy.requiredStatistics
+  public getTaskStatistics (): TaskStatistics {
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategy
+      ) as IWorkerChoiceStrategy
+    ).taskStatistics
   }
 
   /**
@@ -55,36 +117,65 @@ export class WorkerChoiceStrategyContext<
   public setWorkerChoiceStrategy (
     workerChoiceStrategy: WorkerChoiceStrategy
   ): void {
-    this.workerChoiceStrategy?.reset()
-    this.workerChoiceStrategy = getWorkerChoiceStrategy<Worker, Data, Response>(
-      this.pool,
-      workerChoiceStrategy
-    )
+    if (this.workerChoiceStrategy !== workerChoiceStrategy) {
+      this.workerChoiceStrategy = workerChoiceStrategy
+    }
+    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)
   }
 
   /**
-   * Chooses a worker with the worker choice strategy.
+   * Executes the worker choice strategy algorithm in the context.
    *
-   * @returns The key of the chosen one.
+   * @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 {
-    if (
-      this.workerChoiceStrategy.isDynamicPool &&
-      !this.pool.full &&
-      this.pool.findFreeWorkerKey() === -1
-    ) {
-      return this.createWorkerCallback()
+    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 this.workerChoiceStrategy.choose()
+    return workerNodeKey
   }
 
   /**
-   * Removes a worker in the worker choice strategy internals.
+   * Removes the worker node key from the worker choice strategy in the context.
    *
-   * @param workerKey - The key of the worker to remove.
+   * @param workerNodeKey - The key of the worker node.
    * @returns `true` if the removal is successful, `false` otherwise.
    */
-  public remove (workerKey: number): boolean {
-    return this.workerChoiceStrategy.remove(workerKey)
+  public remove (workerNodeKey: number): boolean {
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategy
+      ) as IWorkerChoiceStrategy
+    ).remove(workerNodeKey)
+  }
+
+  /**
+   * Sets the worker choice strategies in the context options.
+   *
+   * @param opts - The worker choice strategy options.
+   */
+  public setOptions (opts: WorkerChoiceStrategyOptions): void {
+    for (const workerChoiceStrategy of this.workerChoiceStrategies.values()) {
+      workerChoiceStrategy.setOptions(opts)
+    }
   }
 }