Merge branch 'master' of github.com:poolifier/poolifier

[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 90c98c6018a1c786fda04234fd48eb5557b0edec..e763f7b2709c083afc81f7c7e53c074e9c59e7a8 100644 (file)
--- a/src/pools/selection-strategies/worker-choice-strategy-context.ts
+++ b/src/pools/selection-strategies/worker-choice-strategy-context.ts
@@ -1,5 +1,5 @@
 import type { IPoolInternal } from '../pool-internal'
-import type { IPoolWorker } from '../pool-worker'
+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'
@@ -7,7 +7,8 @@ import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-stra
 import type {
   IWorkerChoiceStrategy,
   RequiredStatistics,
-  WorkerChoiceStrategy
+  WorkerChoiceStrategy,
+  WorkerChoiceStrategyOptions
 } from './selection-strategies-types'
 import { WorkerChoiceStrategies } from './selection-strategies-types'
 import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy'
@@ -20,29 +21,56 @@ import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-w
  * @typeParam Response - Type of response of execution. This can only be serializable data.
  */
 export class WorkerChoiceStrategyContext<
-  Worker extends IPoolWorker,
+  Worker extends IWorker,
   Data = unknown,
   Response = unknown
 > {
-  private readonly workerChoiceStrategies = new Map<
+  private readonly workerChoiceStrategies: Map<
   WorkerChoiceStrategy,
-  IWorkerChoiceStrategy<Worker, Data, Response>
-  >()
+  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 workerChoiceStrategyType - The worker choice strategy.
+   * @param opts - The worker choice strategy options.
    */
   public constructor (
     pool: IPoolInternal<Worker, Data, Response>,
-    private readonly createWorkerCallback: () => number,
-    private workerChoiceStrategyType: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
+    private workerChoiceStrategyType: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN,
+    opts: WorkerChoiceStrategyOptions = { medRunTime: false }
   ) {
     this.execute.bind(this)
-    this.registerWorkerChoiceStrategy(pool, workerChoiceStrategyType)
+    this.workerChoiceStrategies = new Map<
+    WorkerChoiceStrategy,
+    IWorkerChoiceStrategy
+    >([
+      [
+        WorkerChoiceStrategies.ROUND_ROBIN,
+        new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+      ],
+      [
+        WorkerChoiceStrategies.LESS_USED,
+        new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+      ],
+      [
+        WorkerChoiceStrategies.LESS_BUSY,
+        new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+      ],
+      [
+        WorkerChoiceStrategies.FAIR_SHARE,
+        new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool, opts)
+      ],
+      [
+        WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN,
+        new WeightedRoundRobinWorkerChoiceStrategy<Worker, Data, Response>(
+          pool,
+          opts
+        )
+      ]
+    ])
   }
 
   /**
@@ -54,7 +82,7 @@ export class WorkerChoiceStrategyContext<
     return (
       this.workerChoiceStrategies.get(
         this.workerChoiceStrategyType
-      ) as IWorkerChoiceStrategy<Worker, Data, Response>
+      ) as IWorkerChoiceStrategy
     ).requiredStatistics
   }
 
@@ -64,93 +92,38 @@ export class WorkerChoiceStrategyContext<
    * @param workerChoiceStrategy - The worker choice strategy to set.
    */
   public setWorkerChoiceStrategy (
-    pool: IPoolInternal<Worker, Data, Response>,
     workerChoiceStrategy: WorkerChoiceStrategy
   ): void {
-    if (this.workerChoiceStrategyType === workerChoiceStrategy) {
-      this.workerChoiceStrategies.get(workerChoiceStrategy)?.reset()
-    } else {
+    if (this.workerChoiceStrategyType !== workerChoiceStrategy) {
       this.workerChoiceStrategyType = workerChoiceStrategy
-      this.registerWorkerChoiceStrategy(pool, workerChoiceStrategy)
     }
+    this.workerChoiceStrategies.get(this.workerChoiceStrategyType)?.reset()
   }
 
   /**
    * Executes the worker choice strategy algorithm in the context.
    *
-   * @returns The key of the chosen one.
+   * @returns The key of the worker node.
    */
   public execute (): number {
-    const workerChoiceStrategy = this.workerChoiceStrategies.get(
-      this.workerChoiceStrategyType
-    ) as IWorkerChoiceStrategy<Worker, Data, Response>
-    if (
-      workerChoiceStrategy.isDynamicPool &&
-      !workerChoiceStrategy.pool.full &&
-      workerChoiceStrategy.pool.findFreeWorkerKey() === -1
-    ) {
-      return this.createWorkerCallback()
-    }
-    return workerChoiceStrategy.choose()
+    return (
+      this.workerChoiceStrategies.get(
+        this.workerChoiceStrategyType
+      ) as IWorkerChoiceStrategy
+    ).choose()
   }
 
   /**
-   * Removes a worker from the worker choice strategy in the context.
+   * Removes a 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 {
+  public remove (workerNodeKey: number): boolean {
     return (
       this.workerChoiceStrategies.get(
         this.workerChoiceStrategyType
-      ) as IWorkerChoiceStrategy<Worker, Data, Response>
-    ).remove(workerKey)
-  }
-
-  private registerWorkerChoiceStrategy (
-    pool: IPoolInternal<Worker, Data, Response>,
-    workerChoiceStrategy: WorkerChoiceStrategy
-  ): void {
-    if (!this.workerChoiceStrategies.has(workerChoiceStrategy)) {
-      this.workerChoiceStrategies.set(
-        workerChoiceStrategy,
-        this.getWorkerChoiceStrategy(pool, workerChoiceStrategy)
-      )
-    }
-  }
-
-  /**
-   * Gets the worker choice strategy instance.
-   *
-   * @param pool - The pool instance.
-   * @param workerChoiceStrategy - The worker choice strategy.
-   * @returns The worker choice strategy instance.
-   */
-  private getWorkerChoiceStrategy (
-    pool: IPoolInternal<Worker, Data, Response>,
-    workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
-  ): IWorkerChoiceStrategy<Worker, Data, Response> {
-    switch (workerChoiceStrategy) {
-      case WorkerChoiceStrategies.ROUND_ROBIN:
-        return new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
-      case WorkerChoiceStrategies.LESS_USED:
-        return new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool)
-      case WorkerChoiceStrategies.LESS_BUSY:
-        return new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool)
-      case WorkerChoiceStrategies.FAIR_SHARE:
-        return new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool)
-      case WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN:
-        return new WeightedRoundRobinWorkerChoiceStrategy<
-        Worker,
-        Data,
-        Response
-        >(pool)
-      default:
-        throw new Error(
-          // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
-          `Worker choice strategy '${workerChoiceStrategy}' not found`
-        )
-    }
+      ) as IWorkerChoiceStrategy
+    ).remove(workerNodeKey)
   }
 }