@eik/sink

A sink interface defining the public sink API in Eik.

The intention of the Eik sink modules is to be able to write to and read from files in different storage backends by swapping sink modules. Because each sink implements the same public API it is possible to use this sink in one environment and another sink in a different environment. This is an interface containing the public API each sink has to implement.

Installation

$ npm install @eik/sink

Example

Implement a custom sink:

const { ReadFile } = require('@eik/common');
const Sink = require('@eik/sink');

const SinkCustom = class SinkCustom extends Sink {
    constructor() {
        super();
    }

    write(filePath, contentType) {
        return new Promise((resolve, reject) => {
            try {
                super.constructor.validateFilePath(filePath);
                super.constructor.validateContentType(contentType);
            } catch (error) {
                reject(error);
                return;
            }

            // Custom code

            resolve();
        });
    }

    read(filePath) {
        return new Promise((resolve, reject) => {
            try {
                super.constructor.validateFilePath(filePath);
            } catch (error) {
                reject(error);
                return;
            }

            // Custom code

            const obj = new ReadFile();
            resolve(obj);
        });
    }

    delete(filePath) {
        return new Promise((resolve, reject) => {
            try {
                super.constructor.validateFilePath(filePath);
            } catch (error) {
                reject(error);
                return;
            }

            // Custom code

            resolve();
        });
    }

    exist(filePath) {
        return new Promise((resolve, reject) => {
            try {
                super.constructor.validateFilePath(filePath);
            } catch (error) {
                reject(error);
                return;
            }

            // Custom code

            resolve();
        });
    }

    get metrics() {
        return // Custom metric stream code
    }

    get [Symbol.toStringTag]() {
        return 'SinkCustom';
    }
}

License

Copyright (c) 2020 FINN.no

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.