perf: avoid branching on pool type

[poolifier.git] / src / pools / cluster / dynamic.ts

diff --git a/src/pools/cluster/dynamic.ts b/src/pools/cluster/dynamic.ts
index 58e2b7124d749717ff90df9ad14a387f988a8c53..08ebc75c76a66ba5ca311c2e269988d741ad5aff 100644 (file)
--- a/src/pools/cluster/dynamic.ts
+++ b/src/pools/cluster/dynamic.ts
@@ -1,76 +1,62 @@
-import type { Worker } from 'cluster'
-import type { JSONValue } from '../../utility-types'
-import type { ClusterPoolOptions } from './fixed'
-import { FixedClusterPool } from './fixed'
-import { killBehaviorEnumeration } from '../../worker/worker-options'
+import { checkDynamicPoolSize } from '../utils'
+import { PoolEvents, type PoolType, PoolTypes } from '../pool'
+import { type ClusterPoolOptions, FixedClusterPool } from './fixed'
 
 /**
  * A cluster pool with a dynamic number of workers, but a guaranteed minimum number of workers.
  *
  * This cluster pool creates new workers when the others are busy, up to the maximum number of workers.
- * When the maximum number of workers is reached, an event is emitted. If you want to listen to this event, use the pool's `emitter`.
- *
- * @template Data Type of data sent to the worker.
- * @template Response Type of response of execution.
+ * When the maximum number of workers is reached and workers are busy, an event is emitted. If you want to listen to this event, use the pool's `emitter`.
  *
+ * @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.
  * @author [Christopher Quadflieg](https://github.com/Shinigami92)
  * @since 2.0.0
  */
 export class DynamicClusterPool<
-  Data extends JSONValue = JSONValue,
-  Response extends JSONValue = JSONValue
+  Data = unknown,
+  Response = unknown
 > extends FixedClusterPool<Data, Response> {
   /**
    * Constructs a new poolifier dynamic cluster pool.
    *
-   * @param min Minimum number of workers which are always active.
-   * @param max Maximum number of workers that can be created by this pool.
-   * @param filename Path to an implementation of a `ClusterWorker` file, which can be relative or absolute.
-   * @param opts Options for this fixed cluster pool. Default: `{ maxTasks: 1000 }`
+   * @param min - Minimum number of workers which are always active.
+   * @param max - Maximum number of workers that can be created by this pool.
+   * @param filePath - Path to an implementation of a `ClusterWorker` file, which can be relative or absolute.
+   * @param opts - Options for this dynamic cluster pool.
    */
   public constructor (
     min: number,
-    public readonly max: number,
-    filename: string,
-    opts: ClusterPoolOptions = { maxTasks: 1000 }
+    max: number,
+    filePath: string,
+    opts: ClusterPoolOptions = {}
   ) {
-    super(min, filename, opts)
+    super(min, filePath, opts, max)
+    checkDynamicPoolSize(
+      this.minimumNumberOfWorkers,
+      this.maximumNumberOfWorkers as number
+    )
   }
 
-  /**
-   * Choose a worker for the next task.
-   *
-   * It will first check for and return an idle worker.
-   * If all workers are busy, then it will try to create a new one up to the `max` worker count.
-   * If the max worker count is reached, the emitter will emit a `FullPool` event and it will fall back to using a round robin algorithm to distribute the load.
-   *
-   * @returns Cluster worker.
-   */
-  protected chooseWorker (): Worker {
-    for (const [worker, numberOfTasks] of this.tasks) {
-      if (numberOfTasks === 0) {
-        // A worker is free, use it
-        return worker
-      }
-    }
+  /** @inheritDoc */
+  protected shallCreateDynamicWorker (): boolean {
+    return !this.full && this.internalBusy()
+  }
 
-    if (this.workers.length === this.max) {
-      this.emitter.emit('FullPool')
-      return super.chooseWorker()
+  /** @inheritDoc */
+  protected checkAndEmitDynamicWorkerCreationEvents (): void {
+    if (this.full) {
+      this.emitter?.emit(PoolEvents.full, this.info)
     }
+  }
+
+  /** @inheritDoc */
+  protected get type (): PoolType {
+    return PoolTypes.dynamic
+  }
 
-    // All workers are busy, create a new worker
-    const worker = this.createAndSetupWorker()
-    this.registerWorkerMessageListener<Data>(worker, message => {
-      const tasksInProgress = this.tasks.get(worker)
-      const isKillBehaviorOptionHard =
-        message.kill === killBehaviorEnumeration.HARD
-      if (isKillBehaviorOptionHard || tasksInProgress === 0) {
-        // Kill received from the worker, means that no new tasks are submitted to that worker for a while ( > maxInactiveTime)
-        this.sendToWorker(worker, { kill: 1 })
-        void this.destroyWorker(worker)
-      }
-    })
-    return worker
+  /** @inheritDoc */
+  protected get busy (): boolean {
+    return this.full && this.internalBusy()
   }
 }