X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Fworker-choice-strategy-context.ts;h=5d26f82ba4f5784873c18eb037beed9b26a5e2f5;hb=3085fb0d77d3b14d33324875900d1d088828e12a;hp=b84a8632ffc35a78a71742aa206274997b45eb6d;hpb=0a01b5c3aa58059e7241d4394cf3953779029507;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 b84a8632..5d26f82b 100644
--- a/src/pools/selection-strategies/worker-choice-strategy-context.ts
+++ b/src/pools/selection-strategies/worker-choice-strategy-context.ts
@@ -1,84 +1,172 @@
-import type { AbstractPoolWorker } from '../abstract-pool-worker'
-import type { IPoolInternal } from '../pool-internal'
-import { PoolType } from '../pool-internal'
-import { DynamicPoolWorkerChoiceStrategy } from './dynamic-pool-worker-choice-strategy'
+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 { LessBusyWorkerChoiceStrategy } from './less-busy-worker-choice-strategy'
+import { LessUsedWorkerChoiceStrategy } from './less-used-worker-choice-strategy'
+import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
 import type {
   IWorkerChoiceStrategy,
-  WorkerChoiceStrategy
+  RequiredStatistics,
+  WorkerChoiceStrategy,
+  WorkerChoiceStrategyOptions
 } from './selection-strategies-types'
 import { WorkerChoiceStrategies } from './selection-strategies-types'
-import { SelectionStrategiesUtils } from './selection-strategies-utils'
+import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy'
 
 /**
  * The worker choice strategy context.
  *
- * @template Worker Type of worker.
- * @template Data Type of data sent to the worker. This can only be serializable data.
- * @template Response Type of response of execution. This can only be serializable data.
+ * @typeParam Worker - Type of worker.
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
  */
 export class WorkerChoiceStrategyContext<
-  Worker extends AbstractPoolWorker,
-  Data,
-  Response
+  Worker extends IWorker,
+  Data = unknown,
+  Response = unknown
 > {
-  private workerChoiceStrategy!: IWorkerChoiceStrategy<Worker>
+  private readonly workerChoiceStrategies: Map<
+  WorkerChoiceStrategy,
+  IWorkerChoiceStrategy
+  >
 
   /**
    * Worker choice strategy context constructor.
    *
-   * @param pool The pool instance.
-   * @param createDynamicallyWorkerCallback The worker creation callback for dynamic pool.
-   * @param workerChoiceStrategy The worker choice strategy.
+   * @param pool - The pool instance.
+   * @param workerChoiceStrategy - The worker choice strategy.
+   * @param opts - The worker choice strategy options.
    */
   public constructor (
-    private readonly pool: IPoolInternal<Worker, Data, Response>,
-    private createDynamicallyWorkerCallback: () => Worker,
-    workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
+    pool: IPool<Worker, Data, Response>,
+    private workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN,
+    opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
   ) {
-    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.LESS_USED,
+        new (LessUsedWorkerChoiceStrategy.bind(this))<Worker, Data, Response>(
+          pool,
+          opts
+        )
+      ],
+      [
+        WorkerChoiceStrategies.LESS_BUSY,
+        new (LessBusyWorkerChoiceStrategy.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)
+      ]
+    ])
   }
 
   /**
-   * Get the worker choice strategy instance specific to the pool type.
+   * Gets the worker choice strategy in the context required statistics.
    *
-   * @param workerChoiceStrategy The worker choice strategy.
-   * @returns The worker choice strategy instance for the pool type.
+   * @returns The required statistics.
    */
-  private getPoolWorkerChoiceStrategy (
-    workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
-  ): IWorkerChoiceStrategy<Worker> {
-    if (this.pool.type === PoolType.DYNAMIC) {
-      return new DynamicPoolWorkerChoiceStrategy(
-        this.pool,
-        this.createDynamicallyWorkerCallback,
-        workerChoiceStrategy
-      )
-    }
-    return SelectionStrategiesUtils.getWorkerChoiceStrategy(
-      this.pool,
-      workerChoiceStrategy
-    )
+  public getRequiredStatistics (): RequiredStatistics {
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategy
+      ) as IWorkerChoiceStrategy
+    ).requiredStatistics
   }
 
   /**
-   * Set the worker choice strategy to use in the context.
+   * Sets the worker choice strategy to use in the context.
    *
-   * @param workerChoiceStrategy The worker choice strategy to set.
+   * @param workerChoiceStrategy - The worker choice strategy to set.
    */
   public setWorkerChoiceStrategy (
     workerChoiceStrategy: WorkerChoiceStrategy
   ): void {
-    this.workerChoiceStrategy = this.getPoolWorkerChoiceStrategy(
-      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)
+  }
+
+  /**
+   * 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 {
+    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 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.
+   */
+  public remove (workerNodeKey: number): boolean {
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategy
+      ) as IWorkerChoiceStrategy
+    ).remove(workerNodeKey)
   }
 
   /**
-   * Choose a worker with the underlying selection strategy.
+   * Sets the worker choice strategies in the context options.
    *
-   * @returns The chosen one.
+   * @param opts - The worker choice strategy options.
    */
-  public execute (): Worker {
-    return this.workerChoiceStrategy.choose()
+  public setOptions (opts: WorkerChoiceStrategyOptions): void {
+    this.workerChoiceStrategies.forEach(workerChoiceStrategy => {
+      workerChoiceStrategy.setOptions(opts)
+    })
   }
 }