X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Fabstract-worker-choice-strategy.ts;h=3618944c2043a07b1e8e709aa877d831b2bfc76b;hb=b358c8aca5934f7d5dc4bd234d1909ba13850ea9;hp=7eced8d5985cf5f40c7b02b385b47628ed8c7154;hpb=e0ae6100cd739a48d38b4794c1e55437ac3b59eb;p=poolifier.git

diff --git a/src/pools/selection-strategies/abstract-worker-choice-strategy.ts b/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
index 7eced8d5..3618944c 100644
--- a/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
+++ b/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
@@ -1,18 +1,23 @@
-import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
-import { PoolType, type IPool } from '../pool'
-import type { IWorker } from '../worker'
+import type { IPool } from '../pool.js'
+import {
+  buildWorkerChoiceStrategyOptions,
+  DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS
+} from '../utils.js'
+import type { IWorker } from '../worker.js'
 import type {
   IWorkerChoiceStrategy,
-  RequiredStatistics,
+  MeasurementStatisticsRequirements,
+  StrategyPolicy,
+  TaskStatisticsRequirements,
   WorkerChoiceStrategyOptions
-} from './selection-strategies-types'
+} from './selection-strategies-types.js'
 
 /**
  * Worker choice strategy abstract base class.
  *
  * @typeParam Worker - Type of worker which manages the strategy.
- * @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.
+ * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
+ * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
  */
 export abstract class AbstractWorkerChoiceStrategy<
   Worker extends IWorker,
@@ -20,16 +25,26 @@ export abstract class AbstractWorkerChoiceStrategy<
   Response = unknown
 > implements IWorkerChoiceStrategy {
   /**
-   * Toggles finding the last free worker node key.
+   * The next worker node key.
    */
-  private toggleFindLastFreeWorkerNodeKey: boolean = false
+  protected nextWorkerNodeKey: number | undefined = 0
+
+  /**
+   * The previous worker node key.
+   */
+  protected previousWorkerNodeKey = 0
+
   /** @inheritDoc */
-  protected readonly isDynamicPool: boolean
+  public readonly strategyPolicy: StrategyPolicy = {
+    dynamicWorkerUsage: false,
+    dynamicWorkerReady: true
+  }
+
   /** @inheritDoc */
-  public readonly requiredStatistics: RequiredStatistics = {
-    runTime: false,
-    avgRunTime: false,
-    medRunTime: false
+  public readonly taskStatisticsRequirements: TaskStatisticsRequirements = {
+    runTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+    waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+    elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS
   }
 
   /**
@@ -40,87 +55,146 @@ export abstract class AbstractWorkerChoiceStrategy<
    */
   public constructor (
     protected readonly pool: IPool<Worker, Data, Response>,
-    protected opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+    protected opts?: WorkerChoiceStrategyOptions
   ) {
-    this.isDynamicPool = this.pool.type === PoolType.DYNAMIC
     this.choose = this.choose.bind(this)
+    this.setOptions(this.opts)
+  }
+
+  protected setTaskStatisticsRequirements (
+    opts: WorkerChoiceStrategyOptions | undefined
+  ): void {
+    this.toggleMedianMeasurementStatisticsRequirements(
+      this.taskStatisticsRequirements.runTime,
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      opts!.runTime!.median
+    )
+    this.toggleMedianMeasurementStatisticsRequirements(
+      this.taskStatisticsRequirements.waitTime,
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      opts!.waitTime!.median
+    )
+    this.toggleMedianMeasurementStatisticsRequirements(
+      this.taskStatisticsRequirements.elu,
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      opts!.elu!.median
+    )
   }
 
-  protected checkOptions (opts: WorkerChoiceStrategyOptions): void {
-    if (this.requiredStatistics.avgRunTime && opts.medRunTime === true) {
-      this.requiredStatistics.avgRunTime = false
-      this.requiredStatistics.medRunTime = opts.medRunTime as boolean
+  private toggleMedianMeasurementStatisticsRequirements (
+    measurementStatisticsRequirements: MeasurementStatisticsRequirements,
+    toggleMedian: boolean
+  ): void {
+    if (measurementStatisticsRequirements.average && toggleMedian) {
+      measurementStatisticsRequirements.average = false
+      measurementStatisticsRequirements.median = toggleMedian
     }
-    if (this.requiredStatistics.medRunTime && opts.medRunTime === false) {
-      this.requiredStatistics.avgRunTime = true
-      this.requiredStatistics.medRunTime = opts.medRunTime as boolean
+    if (measurementStatisticsRequirements.median && !toggleMedian) {
+      measurementStatisticsRequirements.average = true
+      measurementStatisticsRequirements.median = toggleMedian
     }
   }
 
+  protected resetWorkerNodeKeyProperties (): void {
+    this.nextWorkerNodeKey = 0
+    this.previousWorkerNodeKey = 0
+  }
+
   /** @inheritDoc */
   public abstract reset (): boolean
 
   /** @inheritDoc */
-  public abstract choose (): number
+  public abstract update (workerNodeKey: number): boolean
+
+  /** @inheritDoc */
+  public abstract choose (): number | undefined
 
   /** @inheritDoc */
   public abstract remove (workerNodeKey: number): boolean
 
   /** @inheritDoc */
-  public setOptions (opts: WorkerChoiceStrategyOptions): void {
-    opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
-    this.checkOptions(opts)
-    this.opts = opts
+  public setOptions (opts: WorkerChoiceStrategyOptions | undefined): void {
+    this.opts = buildWorkerChoiceStrategyOptions<Worker, Data, Response>(
+      this.pool,
+      opts
+    )
+    this.setTaskStatisticsRequirements(this.opts)
   }
 
   /**
-   * Finds a free worker node key.
+   * Whether the worker node is ready or not.
    *
-   * @returns The free worker node key or `-1` if there is no free worker node.
+   * @param workerNodeKey - The worker node key.
+   * @returns Whether the worker node is ready or not.
    */
-  protected findFreeWorkerNodeKey (): number {
-    if (this.toggleFindLastFreeWorkerNodeKey) {
-      this.toggleFindLastFreeWorkerNodeKey = false
-      return this.findLastFreeWorkerNodeKey()
+  protected isWorkerNodeReady (workerNodeKey: number): boolean {
+    return this.pool.workerNodes[workerNodeKey]?.info?.ready ?? false
+  }
+
+  /**
+   * Check the next worker node key.
+   */
+  protected checkNextWorkerNodeKey (): void {
+    if (
+      this.nextWorkerNodeKey != null &&
+      (this.nextWorkerNodeKey < 0 ||
+        !this.isWorkerNodeReady(this.nextWorkerNodeKey))
+    ) {
+      delete this.nextWorkerNodeKey
     }
-    this.toggleFindLastFreeWorkerNodeKey = true
-    return this.findFirstFreeWorkerNodeKey()
   }
 
   /**
-   * Finds the first free worker node key based on the number of tasks the worker has applied.
-   *
-   * If a worker is found with `0` running tasks, it is detected as free and its worker node key is returned.
-   *
-   * If no free worker is found, `-1` is returned.
+   * Gets the worker node task runtime.
+   * If the task statistics require the average runtime, the average runtime is returned.
+   * If the task statistics require the median runtime , the median runtime is returned.
    *
-   * @returns A worker node key if there is one, `-1` otherwise.
+   * @param workerNodeKey - The worker node key.
+   * @returns The worker node task runtime.
    */
-  private findFirstFreeWorkerNodeKey (): number {
-    return this.pool.workerNodes.findIndex(workerNode => {
-      return workerNode.tasksUsage?.running === 0
-    })
+  protected getWorkerNodeTaskRunTime (workerNodeKey: number): number {
+    return this.taskStatisticsRequirements.runTime.median
+      ? this.pool.workerNodes[workerNodeKey].usage.runTime.median ?? 0
+      : this.pool.workerNodes[workerNodeKey].usage.runTime.average ?? 0
   }
 
   /**
-   * Finds the last free worker node key based on the number of tasks the worker has applied.
+   * Gets the worker node task wait time.
+   * If the task statistics require the average wait time, the average wait time is returned.
+   * If the task statistics require the median wait time, the median wait time is returned.
    *
-   * If a worker is found with `0` running tasks, it is detected as free and its worker node key is returned.
+   * @param workerNodeKey - The worker node key.
+   * @returns The worker node task wait time.
+   */
+  protected getWorkerNodeTaskWaitTime (workerNodeKey: number): number {
+    return this.taskStatisticsRequirements.waitTime.median
+      ? this.pool.workerNodes[workerNodeKey].usage.waitTime.median ?? 0
+      : this.pool.workerNodes[workerNodeKey].usage.waitTime.average ?? 0
+  }
+
+  /**
+   * Gets the worker node task ELU.
+   * If the task statistics require the average ELU, the average ELU is returned.
+   * If the task statistics require the median ELU, the median ELU is returned.
    *
-   * If no free worker is found, `-1` is returned.
+   * @param workerNodeKey - The worker node key.
+   * @returns The worker node task ELU.
+   */
+  protected getWorkerNodeTaskElu (workerNodeKey: number): number {
+    return this.taskStatisticsRequirements.elu.median
+      ? this.pool.workerNodes[workerNodeKey].usage.elu.active.median ?? 0
+      : this.pool.workerNodes[workerNodeKey].usage.elu.active.average ?? 0
+  }
+
+  /**
+   * Sets safely the previous worker node key.
    *
-   * @returns A worker node key if there is one, `-1` otherwise.
+   * @param workerNodeKey - The worker node key.
    */
-  private findLastFreeWorkerNodeKey (): number {
-    // It requires node >= 18.0.0
-    // return this.workerNodes.findLastIndex(workerNode => {
-    //   return workerNode.tasksUsage?.running === 0
-    // })
-    for (let i = this.pool.workerNodes.length - 1; i >= 0; i--) {
-      if (this.pool.workerNodes[i].tasksUsage?.running === 0) {
-        return i
-      }
-    }
-    return -1
+  protected setPreviousWorkerNodeKey (workerNodeKey: number | undefined): void {
+    this.previousWorkerNodeKey =
+      workerNodeKey != null && workerNodeKey >= 0
+        ? workerNodeKey
+        : this.previousWorkerNodeKey
   }
 }