Commit | Line | Data |
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fc3e6586 | 1 | import EventEmitter from 'node:events' |
bdaf31cd JB |
2 | import type { |
3 | ErrorHandler, | |
4 | ExitHandler, | |
50e66724 | 5 | IWorker, |
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6 | MessageHandler, |
7 | OnlineHandler | |
f06e48d8 | 8 | } from './worker' |
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9 | import type { |
10 | WorkerChoiceStrategy, | |
11 | WorkerChoiceStrategyOptions | |
12 | } from './selection-strategies/selection-strategies-types' | |
bdaf31cd | 13 | |
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14 | /** |
15 | * Pool events emitter. | |
16 | */ | |
17 | export class PoolEmitter extends EventEmitter {} | |
18 | ||
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19 | /** |
20 | * Enumeration of pool events. | |
21 | */ | |
22 | export const PoolEvents = Object.freeze({ | |
23 | full: 'full', | |
24 | busy: 'busy' | |
25 | } as const) | |
26 | ||
27 | /** | |
28 | * Pool event. | |
29 | */ | |
30 | export type PoolEvent = keyof typeof PoolEvents | |
31 | ||
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32 | /** |
33 | * Options for a poolifier pool. | |
34 | */ | |
50e66724 | 35 | export interface PoolOptions<Worker extends IWorker> { |
bdaf31cd JB |
36 | /** |
37 | * A function that will listen for message event on each worker. | |
38 | */ | |
39 | messageHandler?: MessageHandler<Worker> | |
40 | /** | |
41 | * A function that will listen for error event on each worker. | |
42 | */ | |
43 | errorHandler?: ErrorHandler<Worker> | |
44 | /** | |
45 | * A function that will listen for online event on each worker. | |
46 | */ | |
47 | onlineHandler?: OnlineHandler<Worker> | |
48 | /** | |
49 | * A function that will listen for exit event on each worker. | |
50 | */ | |
51 | exitHandler?: ExitHandler<Worker> | |
52 | /** | |
46e857ca | 53 | * The worker choice strategy to use in this pool. |
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54 | */ |
55 | workerChoiceStrategy?: WorkerChoiceStrategy | |
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56 | /** |
57 | * The worker choice strategy options. | |
58 | */ | |
59 | workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions | |
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60 | /** |
61 | * Pool events emission. | |
62 | * | |
38e795c1 | 63 | * @defaultValue true |
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64 | */ |
65 | enableEvents?: boolean | |
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66 | /** |
67 | * Pool worker tasks queue. | |
68 | * | |
69 | * @experimental | |
70 | * @defaultValue false | |
71 | */ | |
72 | enableTasksQueue?: boolean | |
bdaf31cd | 73 | } |
a35560ba | 74 | |
729c563d S |
75 | /** |
76 | * Contract definition for a poolifier pool. | |
77 | * | |
38e795c1 JB |
78 | * @typeParam Data - Type of data sent to the worker. This can only be serializable data. |
79 | * @typeParam Response - Type of response of execution. This can only be serializable data. | |
729c563d | 80 | */ |
d3c8a1a8 | 81 | export interface IPool<Data = unknown, Response = unknown> { |
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82 | /** |
83 | * Emitter on which events can be listened to. | |
84 | * | |
85 | * Events that can currently be listened to: | |
86 | * | |
164d950a JB |
87 | * - `'full'`: Emitted when the pool is dynamic and full. |
88 | * - `'busy'`: Emitted when the pool is busy. | |
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89 | */ |
90 | readonly emitter?: PoolEmitter | |
729c563d | 91 | /** |
bdede008 | 92 | * Performs the task specified in the constructor with the data parameter. |
729c563d | 93 | * |
38e795c1 | 94 | * @param data - The input for the specified task. This can only be serializable data. |
729c563d S |
95 | * @returns Promise that will be resolved when the task is successfully completed. |
96 | */ | |
78cea37e | 97 | execute: (data: Data) => Promise<Response> |
280c2a77 | 98 | /** |
675bb809 | 99 | * Shutdowns every current worker in this pool. |
280c2a77 | 100 | */ |
78cea37e | 101 | destroy: () => Promise<void> |
a35560ba | 102 | /** |
bdede008 | 103 | * Sets the worker choice strategy in this pool. |
a35560ba | 104 | * |
38e795c1 | 105 | * @param workerChoiceStrategy - The worker choice strategy. |
a35560ba | 106 | */ |
78cea37e | 107 | setWorkerChoiceStrategy: (workerChoiceStrategy: WorkerChoiceStrategy) => void |
c97c7edb | 108 | } |