1 import { isMainThread
} from
'node:worker_threads';
3 import type { ThreadPoolOptions
} from
'poolifier';
5 import type { WorkerAbstract
} from
'./WorkerAbstract';
6 import { WorkerConstants
} from
'./WorkerConstants';
7 import { WorkerDynamicPool
} from
'./WorkerDynamicPool';
8 import { WorkerSet
} from
'./WorkerSet';
9 import { WorkerStaticPool
} from
'./WorkerStaticPool';
10 import { type WorkerData
, type WorkerOptions
, WorkerProcessType
} from
'./WorkerTypes';
12 export class WorkerFactory
{
13 private constructor() {
14 // This is intentional
17 public static getWorkerImplementation
<T
extends WorkerData
>(
19 workerProcessType
: WorkerProcessType
,
20 workerOptions
?: WorkerOptions
,
21 ): WorkerAbstract
<T
> | null {
23 throw new Error('Cannot get a worker implementation outside the main thread');
25 workerOptions
= workerOptions
?? ({} as WorkerOptions
);
26 workerOptions
.workerStartDelay
=
27 workerOptions
?.workerStartDelay
?? WorkerConstants
.DEFAULT_WORKER_START_DELAY
;
28 workerOptions
.elementStartDelay
=
29 workerOptions
?.elementStartDelay
?? WorkerConstants
.DEFAULT_ELEMENT_START_DELAY
;
30 workerOptions
.poolOptions
= workerOptions
?.poolOptions
?? ({} as ThreadPoolOptions
);
31 let workerImplementation
: WorkerAbstract
<T
> | null = null;
32 switch (workerProcessType
) {
33 case WorkerProcessType
.workerSet
:
34 workerOptions
.elementsPerWorker
=
35 workerOptions
?.elementsPerWorker
?? WorkerConstants
.DEFAULT_ELEMENTS_PER_WORKER
;
36 workerImplementation
= new WorkerSet(workerScript
, workerOptions
);
38 case WorkerProcessType
.staticPool
:
39 workerOptions
.poolMaxSize
=
40 workerOptions
?.poolMaxSize
?? WorkerConstants
.DEFAULT_POOL_MAX_SIZE
;
41 workerImplementation
= new WorkerStaticPool(workerScript
, workerOptions
);
43 case WorkerProcessType
.dynamicPool
:
44 workerOptions
.poolMinSize
=
45 workerOptions
?.poolMinSize
?? WorkerConstants
.DEFAULT_POOL_MIN_SIZE
;
46 workerOptions
.poolMaxSize
=
47 workerOptions
?.poolMaxSize
?? WorkerConstants
.DEFAULT_POOL_MAX_SIZE
;
48 workerImplementation
= new WorkerDynamicPool(workerScript
, workerOptions
);
51 // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
52 throw new Error(`Worker implementation type '${workerProcessType}' not found`);
54 return workerImplementation
;