7 } from
'node:worker_threads'
8 import type { MessageValue
} from
'../../utility-types'
9 import { AbstractPool
} from
'../abstract-pool'
10 import { type PoolOptions
, type PoolType
, PoolTypes
} from
'../pool'
11 import { type WorkerType
, WorkerTypes
} from
'../worker'
14 * A thread pool with a fixed number of threads.
16 * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
17 * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
18 * @author [Alessandro Pio Ardizio](https://github.com/pioardi)
21 export class FixedThreadPool
<
24 > extends AbstractPool
<Worker
, Data
, Response
> {
26 * Constructs a new poolifier fixed thread pool.
28 * @param numberOfThreads - Number of threads for this pool.
29 * @param filePath - Path to an implementation of a `ThreadWorker` file, which can be relative or absolute.
30 * @param opts - Options for this fixed thread pool.
33 numberOfThreads
: number,
35 opts
: PoolOptions
<Worker
> = {},
36 maximumNumberOfThreads
?: number
38 super(numberOfThreads
, filePath
, opts
, maximumNumberOfThreads
)
42 protected isMain (): boolean {
47 protected sendToWorker (
48 workerNodeKey
: number,
49 message
: MessageValue
<Data
>,
50 transferList
?: TransferListItem
[]
52 this.workerNodes
[workerNodeKey
].messageChannel
?.port1
?.postMessage(
53 { ...message
, workerId
: this.getWorkerInfo(workerNodeKey
).id
},
59 protected sendStartupMessageToWorker (workerNodeKey
: number): void {
60 const workerNode
= this.workerNodes
[workerNodeKey
]
61 const port2
: MessagePort
= (workerNode
.messageChannel
as MessageChannel
)
63 workerNode
.worker
.postMessage(
66 workerId
: this.getWorkerInfo(workerNodeKey
).id
,
74 protected registerWorkerMessageListener
<Message
extends Data
| Response
>(
75 workerNodeKey
: number,
76 listener
: (message
: MessageValue
<Message
>) => void
78 this.workerNodes
[workerNodeKey
].messageChannel
?.port1
?.on(
85 protected registerOnceWorkerMessageListener
<Message
extends Data
| Response
>(
86 workerNodeKey
: number,
87 listener
: (message
: MessageValue
<Message
>) => void
89 this.workerNodes
[workerNodeKey
].messageChannel
?.port1
?.once(
96 protected deregisterWorkerMessageListener
<Message
extends Data
| Response
>(
97 workerNodeKey
: number,
98 listener
: (message
: MessageValue
<Message
>) => void
100 this.workerNodes
[workerNodeKey
].messageChannel
?.port1
?.off(
107 protected get
type (): PoolType
{
108 return PoolTypes
.fixed
112 protected get
worker (): WorkerType
{
113 return WorkerTypes
.thread
117 protected get
busy (): boolean {
118 return this.internalBusy()