/// <reference types="node" />
import { IModuleOptions, Module } from "../../container";
import { ErrorChain } from "../error";
/** Process runtime information interface. */
export interface IProcessInformation {
    name: string;
    title: string;
    version: string;
    environment: string;
    arch: string;
    platform: NodeJS.Platform;
    nodeVersion: string;
    pid: number;
    type: string;
    release: string;
    endianness: "BE" | "LE";
    hostname: string;
}
/** Process status interface. */
export interface IProcessStatus {
    uptime: number;
    cpuUsage: NodeJS.CpuUsage;
    memoryUsage: NodeJS.MemoryUsage;
}
/** Process error class. */
export declare class ProcessError extends ErrorChain {
    constructor(cause?: Error);
}
/** Node.js process interface. */
export declare class Process extends Module {
    /** Default module name. */
    static readonly moduleName: string;
    /** Environment variable names. */
    static readonly ENV: {
        NAME: string;
        VERSION: string;
        NODE_ENV: string;
    };
    /** Log names. */
    static readonly LOG: {
        INFORMATION: string;
        SIGNAL: string;
    };
    /** Metric names. */
    static readonly METRIC: {
        USER_CPU_USAGE: string;
        SYSTEM_CPU_USAGE: string;
        RSS_MEMORY_USAGE: string;
        HEAP_TOTAL_MEMORY_USAGE: string;
        HEAP_USED_MEMORY_USAGE: string;
    };
    /** Get Node.js process title. */
    static readonly title: string;
    /** Set Node.js process title. */
    static setTitle(name?: string): string;
    readonly title: string;
    readonly version: string;
    readonly nodeEnvironment: string;
    /** Override in subclass to change metric interval. */
    readonly metricInterval: number;
    readonly information: IProcessInformation;
    readonly status: IProcessStatus;
    constructor(options: IModuleOptions);
    /** Try to read process information asset file, handle process events. */
    moduleUp(): void;
    protected readonly envName: string;
    protected readonly envVersion: string;
    protected readonly envNodeEnv: string;
    /** Container down when process termination signal received. */
    protected onSignal(signal: string): void;
    protected getProcessMetrics(status: IProcessStatus): void;
}