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/** | |
* Clusters of Node.js processes can be used to run multiple instances of Node.js | |
* that can distribute workloads among their application threads. When process isolation | |
* is not needed, use the [`worker_threads`](https://nodejs.org/docs/latest-v20.x/api/worker_threads.html) | |
* module instead, which allows running multiple application threads within a single Node.js instance. | |
* | |
* The cluster module allows easy creation of child processes that all share | |
* server ports. | |
* | |
* ```js | |
* import cluster from 'node:cluster'; | |
* import http from 'node:http'; | |
* import { availableParallelism } from 'node:os'; | |
* import process from 'node:process'; | |
* | |
* const numCPUs = availableParallelism(); | |
* | |
* if (cluster.isPrimary) { | |
* console.log(`Primary ${process.pid} is running`); | |
* | |
* // Fork workers. | |
* for (let i = 0; i < numCPUs; i++) { | |
* cluster.fork(); | |
* } | |
* | |
* cluster.on('exit', (worker, code, signal) => { | |
* console.log(`worker ${worker.process.pid} died`); | |
* }); | |
* } else { | |
* // Workers can share any TCP connection | |
* // In this case it is an HTTP server | |
* http.createServer((req, res) => { | |
* res.writeHead(200); | |
* res.end('hello world\n'); | |
* }).listen(8000); | |
* | |
* console.log(`Worker ${process.pid} started`); | |
* } | |
* ``` | |
* | |
* Running Node.js will now share port 8000 between the workers: | |
* | |
* ```console | |
* $ node server.js | |
* Primary 3596 is running | |
* Worker 4324 started | |
* Worker 4520 started | |
* Worker 6056 started | |
* Worker 5644 started | |
* ``` | |
* | |
* On Windows, it is not yet possible to set up a named pipe server in a worker. | |
* @see [source](https://github.com/nodejs/node/blob/v20.13.1/lib/cluster.js) | |
*/ | |
declare module "cluster" { | |
import * as child from "node:child_process"; | |
import EventEmitter = require("node:events"); | |
import * as net from "node:net"; | |
type SerializationType = "json" | "advanced"; | |
export interface ClusterSettings { | |
/** | |
* List of string arguments passed to the Node.js executable. | |
* @default process.execArgv | |
*/ | |
execArgv?: string[] | undefined; | |
/** | |
* File path to worker file. | |
* @default process.argv[1] | |
*/ | |
exec?: string | undefined; | |
/** | |
* String arguments passed to worker. | |
* @default process.argv.slice(2) | |
*/ | |
args?: string[] | undefined; | |
/** | |
* Whether or not to send output to parent's stdio. | |
* @default false | |
*/ | |
silent?: boolean | undefined; | |
/** | |
* Configures the stdio of forked processes. Because the cluster module relies on IPC to function, this configuration must | |
* contain an `'ipc'` entry. When this option is provided, it overrides `silent`. See [`child_prcess.spawn()`](https://nodejs.org/docs/latest-v20.x/api/child_process.html#child_processspawncommand-args-options)'s | |
* [`stdio`](https://nodejs.org/docs/latest-v20.x/api/child_process.html#optionsstdio). | |
*/ | |
stdio?: any[] | undefined; | |
/** | |
* Sets the user identity of the process. (See [`setuid(2)`](https://man7.org/linux/man-pages/man2/setuid.2.html).) | |
*/ | |
uid?: number | undefined; | |
/** | |
* Sets the group identity of the process. (See [`setgid(2)`](https://man7.org/linux/man-pages/man2/setgid.2.html).) | |
*/ | |
gid?: number | undefined; | |
/** | |
* Sets inspector port of worker. This can be a number, or a function that takes no arguments and returns a number. | |
* By default each worker gets its own port, incremented from the primary's `process.debugPort`. | |
*/ | |
inspectPort?: number | (() => number) | undefined; | |
/** | |
* Specify the kind of serialization used for sending messages between processes. Possible values are `'json'` and `'advanced'`. | |
* See [Advanced serialization for `child_process`](https://nodejs.org/docs/latest-v20.x/api/child_process.html#advanced-serialization) for more details. | |
* @default false | |
*/ | |
serialization?: SerializationType | undefined; | |
/** | |
* Current working directory of the worker process. | |
* @default undefined (inherits from parent process) | |
*/ | |
cwd?: string | undefined; | |
/** | |
* Hide the forked processes console window that would normally be created on Windows systems. | |
* @default false | |
*/ | |
windowsHide?: boolean | undefined; | |
} | |
export interface Address { | |
address: string; | |
port: number; | |
/** | |
* The `addressType` is one of: | |
* | |
* * `4` (TCPv4) | |
* * `6` (TCPv6) | |
* * `-1` (Unix domain socket) | |
* * `'udp4'` or `'udp6'` (UDPv4 or UDPv6) | |
*/ | |
addressType: 4 | 6 | -1 | "udp4" | "udp6"; | |
} | |
/** | |
* A `Worker` object contains all public information and method about a worker. | |
* In the primary it can be obtained using `cluster.workers`. In a worker | |
* it can be obtained using `cluster.worker`. | |
* @since v0.7.0 | |
*/ | |
export class Worker extends EventEmitter { | |
/** | |
* Each new worker is given its own unique id, this id is stored in the `id`. | |
* | |
* While a worker is alive, this is the key that indexes it in `cluster.workers`. | |
* @since v0.8.0 | |
*/ | |
id: number; | |
/** | |
* All workers are created using [`child_process.fork()`](https://nodejs.org/docs/latest-v20.x/api/child_process.html#child_processforkmodulepath-args-options), the returned object | |
* from this function is stored as `.process`. In a worker, the global `process` is stored. | |
* | |
* See: [Child Process module](https://nodejs.org/docs/latest-v20.x/api/child_process.html#child_processforkmodulepath-args-options). | |
* | |
* Workers will call `process.exit(0)` if the `'disconnect'` event occurs | |
* on `process` and `.exitedAfterDisconnect` is not `true`. This protects against | |
* accidental disconnection. | |
* @since v0.7.0 | |
*/ | |
process: child.ChildProcess; | |
/** | |
* Send a message to a worker or primary, optionally with a handle. | |
* | |
* In the primary, this sends a message to a specific worker. It is identical to [`ChildProcess.send()`](https://nodejs.org/docs/latest-v20.x/api/child_process.html#subprocesssendmessage-sendhandle-options-callback). | |
* | |
* In a worker, this sends a message to the primary. It is identical to `process.send()`. | |
* | |
* This example will echo back all messages from the primary: | |
* | |
* ```js | |
* if (cluster.isPrimary) { | |
* const worker = cluster.fork(); | |
* worker.send('hi there'); | |
* | |
* } else if (cluster.isWorker) { | |
* process.on('message', (msg) => { | |
* process.send(msg); | |
* }); | |
* } | |
* ``` | |
* @since v0.7.0 | |
* @param options The `options` argument, if present, is an object used to parameterize the sending of certain types of handles. | |
*/ | |
send(message: child.Serializable, callback?: (error: Error | null) => void): boolean; | |
send( | |
message: child.Serializable, | |
sendHandle: child.SendHandle, | |
callback?: (error: Error | null) => void, | |
): boolean; | |
send( | |
message: child.Serializable, | |
sendHandle: child.SendHandle, | |
options?: child.MessageOptions, | |
callback?: (error: Error | null) => void, | |
): boolean; | |
/** | |
* This function will kill the worker. In the primary worker, it does this by | |
* disconnecting the `worker.process`, and once disconnected, killing with `signal`. In the worker, it does it by killing the process with `signal`. | |
* | |
* The `kill()` function kills the worker process without waiting for a graceful | |
* disconnect, it has the same behavior as `worker.process.kill()`. | |
* | |
* This method is aliased as `worker.destroy()` for backwards compatibility. | |
* | |
* In a worker, `process.kill()` exists, but it is not this function; | |
* it is [`kill()`](https://nodejs.org/docs/latest-v20.x/api/process.html#processkillpid-signal). | |
* @since v0.9.12 | |
* @param [signal='SIGTERM'] Name of the kill signal to send to the worker process. | |
*/ | |
kill(signal?: string): void; | |
destroy(signal?: string): void; | |
/** | |
* In a worker, this function will close all servers, wait for the `'close'` event | |
* on those servers, and then disconnect the IPC channel. | |
* | |
* In the primary, an internal message is sent to the worker causing it to call `.disconnect()` on itself. | |
* | |
* Causes `.exitedAfterDisconnect` to be set. | |
* | |
* After a server is closed, it will no longer accept new connections, | |
* but connections may be accepted by any other listening worker. Existing | |
* connections will be allowed to close as usual. When no more connections exist, | |
* see `server.close()`, the IPC channel to the worker will close allowing it | |
* to die gracefully. | |
* | |
* The above applies _only_ to server connections, client connections are not | |
* automatically closed by workers, and disconnect does not wait for them to close | |
* before exiting. | |
* | |
* In a worker, `process.disconnect` exists, but it is not this function; | |
* it is `disconnect()`. | |
* | |
* Because long living server connections may block workers from disconnecting, it | |
* may be useful to send a message, so application specific actions may be taken to | |
* close them. It also may be useful to implement a timeout, killing a worker if | |
* the `'disconnect'` event has not been emitted after some time. | |
* | |
* ```js | |
* if (cluster.isPrimary) { | |
* const worker = cluster.fork(); | |
* let timeout; | |
* | |
* worker.on('listening', (address) => { | |
* worker.send('shutdown'); | |
* worker.disconnect(); | |
* timeout = setTimeout(() => { | |
* worker.kill(); | |
* }, 2000); | |
* }); | |
* | |
* worker.on('disconnect', () => { | |
* clearTimeout(timeout); | |
* }); | |
* | |
* } else if (cluster.isWorker) { | |
* const net = require('node:net'); | |
* const server = net.createServer((socket) => { | |
* // Connections never end | |
* }); | |
* | |
* server.listen(8000); | |
* | |
* process.on('message', (msg) => { | |
* if (msg === 'shutdown') { | |
* // Initiate graceful close of any connections to server | |
* } | |
* }); | |
* } | |
* ``` | |
* @since v0.7.7 | |
* @return A reference to `worker`. | |
*/ | |
disconnect(): void; | |
/** | |
* This function returns `true` if the worker is connected to its primary via its | |
* IPC channel, `false` otherwise. A worker is connected to its primary after it | |
* has been created. It is disconnected after the `'disconnect'` event is emitted. | |
* @since v0.11.14 | |
*/ | |
isConnected(): boolean; | |
/** | |
* This function returns `true` if the worker's process has terminated (either | |
* because of exiting or being signaled). Otherwise, it returns `false`. | |
* | |
* ```js | |
* import cluster from 'node:cluster'; | |
* import http from 'node:http'; | |
* import { availableParallelism } from 'node:os'; | |
* import process from 'node:process'; | |
* | |
* const numCPUs = availableParallelism(); | |
* | |
* if (cluster.isPrimary) { | |
* console.log(`Primary ${process.pid} is running`); | |
* | |
* // Fork workers. | |
* for (let i = 0; i < numCPUs; i++) { | |
* cluster.fork(); | |
* } | |
* | |
* cluster.on('fork', (worker) => { | |
* console.log('worker is dead:', worker.isDead()); | |
* }); | |
* | |
* cluster.on('exit', (worker, code, signal) => { | |
* console.log('worker is dead:', worker.isDead()); | |
* }); | |
* } else { | |
* // Workers can share any TCP connection. In this case, it is an HTTP server. | |
* http.createServer((req, res) => { | |
* res.writeHead(200); | |
* res.end(`Current process\n ${process.pid}`); | |
* process.kill(process.pid); | |
* }).listen(8000); | |
* } | |
* ``` | |
* @since v0.11.14 | |
*/ | |
isDead(): boolean; | |
/** | |
* This property is `true` if the worker exited due to `.disconnect()`. | |
* If the worker exited any other way, it is `false`. If the | |
* worker has not exited, it is `undefined`. | |
* | |
* The boolean `worker.exitedAfterDisconnect` allows distinguishing between | |
* voluntary and accidental exit, the primary may choose not to respawn a worker | |
* based on this value. | |
* | |
* ```js | |
* cluster.on('exit', (worker, code, signal) => { | |
* if (worker.exitedAfterDisconnect === true) { | |
* console.log('Oh, it was just voluntary – no need to worry'); | |
* } | |
* }); | |
* | |
* // kill worker | |
* worker.kill(); | |
* ``` | |
* @since v6.0.0 | |
*/ | |
exitedAfterDisconnect: boolean; | |
/** | |
* events.EventEmitter | |
* 1. disconnect | |
* 2. error | |
* 3. exit | |
* 4. listening | |
* 5. message | |
* 6. online | |
*/ | |
addListener(event: string, listener: (...args: any[]) => void): this; | |
addListener(event: "disconnect", listener: () => void): this; | |
addListener(event: "error", listener: (error: Error) => void): this; | |
addListener(event: "exit", listener: (code: number, signal: string) => void): this; | |
addListener(event: "listening", listener: (address: Address) => void): this; | |
addListener(event: "message", listener: (message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
addListener(event: "online", listener: () => void): this; | |
emit(event: string | symbol, ...args: any[]): boolean; | |
emit(event: "disconnect"): boolean; | |
emit(event: "error", error: Error): boolean; | |
emit(event: "exit", code: number, signal: string): boolean; | |
emit(event: "listening", address: Address): boolean; | |
emit(event: "message", message: any, handle: net.Socket | net.Server): boolean; | |
emit(event: "online"): boolean; | |
on(event: string, listener: (...args: any[]) => void): this; | |
on(event: "disconnect", listener: () => void): this; | |
on(event: "error", listener: (error: Error) => void): this; | |
on(event: "exit", listener: (code: number, signal: string) => void): this; | |
on(event: "listening", listener: (address: Address) => void): this; | |
on(event: "message", listener: (message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
on(event: "online", listener: () => void): this; | |
once(event: string, listener: (...args: any[]) => void): this; | |
once(event: "disconnect", listener: () => void): this; | |
once(event: "error", listener: (error: Error) => void): this; | |
once(event: "exit", listener: (code: number, signal: string) => void): this; | |
once(event: "listening", listener: (address: Address) => void): this; | |
once(event: "message", listener: (message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
once(event: "online", listener: () => void): this; | |
prependListener(event: string, listener: (...args: any[]) => void): this; | |
prependListener(event: "disconnect", listener: () => void): this; | |
prependListener(event: "error", listener: (error: Error) => void): this; | |
prependListener(event: "exit", listener: (code: number, signal: string) => void): this; | |
prependListener(event: "listening", listener: (address: Address) => void): this; | |
prependListener(event: "message", listener: (message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
prependListener(event: "online", listener: () => void): this; | |
prependOnceListener(event: string, listener: (...args: any[]) => void): this; | |
prependOnceListener(event: "disconnect", listener: () => void): this; | |
prependOnceListener(event: "error", listener: (error: Error) => void): this; | |
prependOnceListener(event: "exit", listener: (code: number, signal: string) => void): this; | |
prependOnceListener(event: "listening", listener: (address: Address) => void): this; | |
prependOnceListener(event: "message", listener: (message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
prependOnceListener(event: "online", listener: () => void): this; | |
} | |
export interface Cluster extends EventEmitter { | |
disconnect(callback?: () => void): void; | |
/** | |
* Spawn a new worker process. | |
* | |
* This can only be called from the primary process. | |
* @param env Key/value pairs to add to worker process environment. | |
* @since v0.6.0 | |
*/ | |
fork(env?: any): Worker; | |
/** @deprecated since v16.0.0 - use isPrimary. */ | |
readonly isMaster: boolean; | |
/** | |
* True if the process is a primary. This is determined by the `process.env.NODE_UNIQUE_ID`. If `process.env.NODE_UNIQUE_ID` | |
* is undefined, then `isPrimary` is `true`. | |
* @since v16.0.0 | |
*/ | |
readonly isPrimary: boolean; | |
/** | |
* True if the process is not a primary (it is the negation of `cluster.isPrimary`). | |
* @since v0.6.0 | |
*/ | |
readonly isWorker: boolean; | |
/** | |
* The scheduling policy, either `cluster.SCHED_RR` for round-robin or `cluster.SCHED_NONE` to leave it to the operating system. This is a | |
* global setting and effectively frozen once either the first worker is spawned, or [`.setupPrimary()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clustersetupprimarysettings) | |
* is called, whichever comes first. | |
* | |
* `SCHED_RR` is the default on all operating systems except Windows. Windows will change to `SCHED_RR` once libuv is able to effectively distribute | |
* IOCP handles without incurring a large performance hit. | |
* | |
* `cluster.schedulingPolicy` can also be set through the `NODE_CLUSTER_SCHED_POLICY` environment variable. Valid values are `'rr'` and `'none'`. | |
* @since v0.11.2 | |
*/ | |
schedulingPolicy: number; | |
/** | |
* After calling [`.setupPrimary()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clustersetupprimarysettings) | |
* (or [`.fork()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clusterforkenv)) this settings object will contain | |
* the settings, including the default values. | |
* | |
* This object is not intended to be changed or set manually. | |
* @since v0.7.1 | |
*/ | |
readonly settings: ClusterSettings; | |
/** @deprecated since v16.0.0 - use [`.setupPrimary()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clustersetupprimarysettings) instead. */ | |
setupMaster(settings?: ClusterSettings): void; | |
/** | |
* `setupPrimary` is used to change the default 'fork' behavior. Once called, the settings will be present in `cluster.settings`. | |
* | |
* Any settings changes only affect future calls to [`.fork()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clusterforkenv) | |
* and have no effect on workers that are already running. | |
* | |
* The only attribute of a worker that cannot be set via `.setupPrimary()` is the `env` passed to | |
* [`.fork()`](https://nodejs.org/docs/latest-v20.x/api/cluster.html#clusterforkenv). | |
* | |
* The defaults above apply to the first call only; the defaults for later calls are the current values at the time of | |
* `cluster.setupPrimary()` is called. | |
* | |
* ```js | |
* import cluster from 'node:cluster'; | |
* | |
* cluster.setupPrimary({ | |
* exec: 'worker.js', | |
* args: ['--use', 'https'], | |
* silent: true, | |
* }); | |
* cluster.fork(); // https worker | |
* cluster.setupPrimary({ | |
* exec: 'worker.js', | |
* args: ['--use', 'http'], | |
* }); | |
* cluster.fork(); // http worker | |
* ``` | |
* | |
* This can only be called from the primary process. | |
* @since v16.0.0 | |
*/ | |
setupPrimary(settings?: ClusterSettings): void; | |
/** | |
* A reference to the current worker object. Not available in the primary process. | |
* | |
* ```js | |
* import cluster from 'node:cluster'; | |
* | |
* if (cluster.isPrimary) { | |
* console.log('I am primary'); | |
* cluster.fork(); | |
* cluster.fork(); | |
* } else if (cluster.isWorker) { | |
* console.log(`I am worker #${cluster.worker.id}`); | |
* } | |
* ``` | |
* @since v0.7.0 | |
*/ | |
readonly worker?: Worker | undefined; | |
/** | |
* A hash that stores the active worker objects, keyed by `id` field. This makes it easy to loop through all the workers. It is only available in the primary process. | |
* | |
* A worker is removed from `cluster.workers` after the worker has disconnected _and_ exited. The order between these two events cannot be determined in advance. However, it | |
* is guaranteed that the removal from the `cluster.workers` list happens before the last `'disconnect'` or `'exit'` event is emitted. | |
* | |
* ```js | |
* import cluster from 'node:cluster'; | |
* | |
* for (const worker of Object.values(cluster.workers)) { | |
* worker.send('big announcement to all workers'); | |
* } | |
* ``` | |
* @since v0.7.0 | |
*/ | |
readonly workers?: NodeJS.Dict<Worker> | undefined; | |
readonly SCHED_NONE: number; | |
readonly SCHED_RR: number; | |
/** | |
* events.EventEmitter | |
* 1. disconnect | |
* 2. exit | |
* 3. fork | |
* 4. listening | |
* 5. message | |
* 6. online | |
* 7. setup | |
*/ | |
addListener(event: string, listener: (...args: any[]) => void): this; | |
addListener(event: "disconnect", listener: (worker: Worker) => void): this; | |
addListener(event: "exit", listener: (worker: Worker, code: number, signal: string) => void): this; | |
addListener(event: "fork", listener: (worker: Worker) => void): this; | |
addListener(event: "listening", listener: (worker: Worker, address: Address) => void): this; | |
addListener( | |
event: "message", | |
listener: (worker: Worker, message: any, handle: net.Socket | net.Server) => void, | |
): this; // the handle is a net.Socket or net.Server object, or undefined. | |
addListener(event: "online", listener: (worker: Worker) => void): this; | |
addListener(event: "setup", listener: (settings: ClusterSettings) => void): this; | |
emit(event: string | symbol, ...args: any[]): boolean; | |
emit(event: "disconnect", worker: Worker): boolean; | |
emit(event: "exit", worker: Worker, code: number, signal: string): boolean; | |
emit(event: "fork", worker: Worker): boolean; | |
emit(event: "listening", worker: Worker, address: Address): boolean; | |
emit(event: "message", worker: Worker, message: any, handle: net.Socket | net.Server): boolean; | |
emit(event: "online", worker: Worker): boolean; | |
emit(event: "setup", settings: ClusterSettings): boolean; | |
on(event: string, listener: (...args: any[]) => void): this; | |
on(event: "disconnect", listener: (worker: Worker) => void): this; | |
on(event: "exit", listener: (worker: Worker, code: number, signal: string) => void): this; | |
on(event: "fork", listener: (worker: Worker) => void): this; | |
on(event: "listening", listener: (worker: Worker, address: Address) => void): this; | |
on(event: "message", listener: (worker: Worker, message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
on(event: "online", listener: (worker: Worker) => void): this; | |
on(event: "setup", listener: (settings: ClusterSettings) => void): this; | |
once(event: string, listener: (...args: any[]) => void): this; | |
once(event: "disconnect", listener: (worker: Worker) => void): this; | |
once(event: "exit", listener: (worker: Worker, code: number, signal: string) => void): this; | |
once(event: "fork", listener: (worker: Worker) => void): this; | |
once(event: "listening", listener: (worker: Worker, address: Address) => void): this; | |
once(event: "message", listener: (worker: Worker, message: any, handle: net.Socket | net.Server) => void): this; // the handle is a net.Socket or net.Server object, or undefined. | |
once(event: "online", listener: (worker: Worker) => void): this; | |
once(event: "setup", listener: (settings: ClusterSettings) => void): this; | |
prependListener(event: string, listener: (...args: any[]) => void): this; | |
prependListener(event: "disconnect", listener: (worker: Worker) => void): this; | |
prependListener(event: "exit", listener: (worker: Worker, code: number, signal: string) => void): this; | |
prependListener(event: "fork", listener: (worker: Worker) => void): this; | |
prependListener(event: "listening", listener: (worker: Worker, address: Address) => void): this; | |
// the handle is a net.Socket or net.Server object, or undefined. | |
prependListener( | |
event: "message", | |
listener: (worker: Worker, message: any, handle?: net.Socket | net.Server) => void, | |
): this; | |
prependListener(event: "online", listener: (worker: Worker) => void): this; | |
prependListener(event: "setup", listener: (settings: ClusterSettings) => void): this; | |
prependOnceListener(event: string, listener: (...args: any[]) => void): this; | |
prependOnceListener(event: "disconnect", listener: (worker: Worker) => void): this; | |
prependOnceListener(event: "exit", listener: (worker: Worker, code: number, signal: string) => void): this; | |
prependOnceListener(event: "fork", listener: (worker: Worker) => void): this; | |
prependOnceListener(event: "listening", listener: (worker: Worker, address: Address) => void): this; | |
// the handle is a net.Socket or net.Server object, or undefined. | |
prependOnceListener( | |
event: "message", | |
listener: (worker: Worker, message: any, handle: net.Socket | net.Server) => void, | |
): this; | |
prependOnceListener(event: "online", listener: (worker: Worker) => void): this; | |
prependOnceListener(event: "setup", listener: (settings: ClusterSettings) => void): this; | |
} | |
const cluster: Cluster; | |
export default cluster; | |
} | |
declare module "node:cluster" { | |
export * from "cluster"; | |
export { default as default } from "cluster"; | |
} | |