/// <reference types="node" />
import { ChildProcess, ForkOptions } from 'child_process';
import { TempDataManager } from '../../modules/temp-data-manager';
import { EPSProcessName } from '../../types/eps-process-types';
export declare enum ProcessType {
    /**
     * The parent process of eps. The process manager monitors the process.
     * If a parent process is killed, the process manager will terminate all
     * eps related processes.
     */
    parent = "parent",
    /**
     * The sibling process of the main eps process. If a sibling process is killed,
     * the process manager will terminate all sibling and child processes.
     */
    sibling = "sibling",
    /**
     * The independent child process of eps. e.g. extractor-app. If a child process is
     * killed, the process manager will removes it from the watching list. A child process
     * will never affect other eps processes.
     */
    child = "child"
}
type EPSProcessInfo = {
    type: ProcessType;
    name: string;
    pid: number;
    process?: object;
};
export declare class EPSProcessManager {
    private processes;
    private tempDataManager;
    constructor(tempDataManager: TempDataManager);
    start(): void;
    fork(epsProcessName: EPSProcessName, type: ProcessType.sibling | ProcessType.child, modulePath: string, args: string[], forkOptions?: ForkOptions): ChildProcess;
    setupMainProcess(): void;
    private checkProcesses;
    addPID(pid: number, name: string, type: ProcessType): EPSProcessInfo[];
    stopChildProcess(pid: number): void;
    private stopAllProcesses;
    /**
     * processExists provides a mechanism to check whether a pid is an active process.
     * Advantage of this is that it does not require a separate executable to work.
     * The 3PL `processExists` has a dependency on fastlist, which on windows requires
     * fastlist.exe. Bundling the fastlist executable with the EPS executable is not
     * simple on Windows, so replacing 3PL solution with this fn avoids that dependency.
     */
    processExists(pid: number): boolean;
}
export declare function getSortedProcessesToStop(processInfos: EPSProcessInfo[]): EPSProcessInfo[];
export {};