X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Fleast-busy-worker-choice-strategy.ts;h=91fbfc782579f83950482ba71019c9197e5e6348;hb=946b809b91118cd7442b90971344e53e15c26466;hp=3c0856856189ab7d7af4c4f2a625ae9058ac9029;hpb=1c6fe997dcb16b510da6587b992cd3f66d62a259;p=poolifier.git

diff --git a/src/pools/selection-strategies/least-busy-worker-choice-strategy.ts b/src/pools/selection-strategies/least-busy-worker-choice-strategy.ts
index 3c085685..91fbfc78 100644
--- a/src/pools/selection-strategies/least-busy-worker-choice-strategy.ts
+++ b/src/pools/selection-strategies/least-busy-worker-choice-strategy.ts
@@ -1,4 +1,7 @@
-import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
+import {
+  DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+  DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+} from '../../utils'
 import type { IPool } from '../pool'
 import type { IWorker } from '../worker'
 import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
@@ -12,8 +15,8 @@ import type {
  * Selects the least busy worker.
  *
  * @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 class LeastBusyWorkerChoiceStrategy<
     Worker extends IWorker,
@@ -24,13 +27,17 @@ export class LeastBusyWorkerChoiceStrategy<
   implements IWorkerChoiceStrategy {
   /** @inheritDoc */
   public readonly taskStatisticsRequirements: TaskStatisticsRequirements = {
-    runTime: true,
-    avgRunTime: false,
-    medRunTime: false,
-    waitTime: true,
-    avgWaitTime: false,
-    medWaitTime: false,
-    elu: false
+    runTime: {
+      aggregate: true,
+      average: false,
+      median: false
+    },
+    waitTime: {
+      aggregate: true,
+      average: false,
+      median: false
+    },
+    elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS
   }
 
   /** @inheritDoc */
@@ -39,7 +46,7 @@ export class LeastBusyWorkerChoiceStrategy<
     opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
   ) {
     super(pool, opts)
-    this.setTaskStatistics(this.opts)
+    this.setTaskStatisticsRequirements(this.opts)
   }
 
   /** @inheritDoc */
@@ -53,25 +60,28 @@ export class LeastBusyWorkerChoiceStrategy<
   }
 
   /** @inheritDoc */
-  public choose (): number {
-    let minTime = Infinity
-    let leastBusyWorkerNodeKey!: number
-    for (const [workerNodeKey, workerNode] of this.pool.workerNodes.entries()) {
-      const workerTime =
-        workerNode.workerUsage.runTime.aggregation +
-        workerNode.workerUsage.waitTime.aggregation
-      if (workerTime === 0) {
-        return workerNodeKey
-      } else if (workerTime < minTime) {
-        minTime = workerTime
-        leastBusyWorkerNodeKey = workerNodeKey
-      }
-    }
-    return leastBusyWorkerNodeKey
+  public choose (): number | undefined {
+    this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey)
+    this.nextWorkerNodeKey = this.leastBusyNextWorkerNodeKey()
+    return this.nextWorkerNodeKey
   }
 
   /** @inheritDoc */
   public remove (): boolean {
     return true
   }
+
+  private leastBusyNextWorkerNodeKey (): number | undefined {
+    return this.pool.workerNodes.reduce(
+      (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => {
+        return (workerNode.usage.runTime?.aggregate ?? 0) +
+          (workerNode.usage.waitTime?.aggregate ?? 0) <
+          (workerNodes[minWorkerNodeKey].usage.runTime?.aggregate ?? 0) +
+            (workerNodes[minWorkerNodeKey].usage.waitTime?.aggregate ?? 0)
+          ? workerNodeKey
+          : minWorkerNodeKey
+      },
+      0
+    )
+  }
 }