/*******************************************************************************
 * Copyright (c) 2021. Rex Isaac Raphael
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * File name:         kubernetes-config.source.ts
 * Last modified:     28/03/2021, 17:35
 ******************************************************************************/
import { OnModuleInit } from '@nestjs/common';
import { BaseConfigOptions, ConfigSource, IConfigSource, IConfigStore } from '@ultimate-backend/common';
import * as k8s from '@kubernetes/client-node';
import { KubernetesClient } from '../kubernetes.client';
export interface KubernetesConfigOptions extends BaseConfigOptions {
    source: ConfigSource.Kubernetes;
    key: string;
    name: string;
    namespace?: string;
}
/**
 * This is a client implementation of config for ETCD
 * @packageDocumentation
 */
export declare class KubernetesConfigSource implements IConfigSource, OnModuleInit {
    private readonly kubernetes;
    private readonly options;
    private readonly store;
    private watchers;
    private logger;
    private defaultNamespace;
    constructor(kubernetes: KubernetesClient, options: any, store: IConfigStore<any>);
    onModuleInit(): Promise<void>;
    /**
     * get config by path. Supports dot notation for example (name.firstname)
     * @param path
     * @param defaultValue
     * @typeParam T Return type `T`
     * @return T It returns a `Promise<T>` or just `T`
     *
     * @example
     * ```typescript
     * const config = EtcdConfigSource(...);
     * config.get<string>('name.firstname', 'Johny);
     * ```
     */
    get<T extends any>(path: string, defaultValue: T): Promise<T> | T | undefined;
    get<T extends any>(path: string): Promise<T> | T | undefined;
    set(path: string, value: any): Promise<void>;
    private watchAllConfigs;
    watchK8s<T extends any>(name: string, key: string, namespace: string, callback: (value: T) => void): Promise<k8s.Watch>;
    private addToStore;
    watch<T extends any>(name: string, callback: (value: T) => void): Promise<k8s.Watch>;
}