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    promisifypublic

    Promisify: Convert callback-based APIs to promises

    Promises are a popular solution to some of the drawbacks of the callback-style async APIs dominant in node.js libraries. But it's awkward to write an node.js application using promises when all the libraries you want to use are callback-based.

    Hence Promisify. It converts callback-style APIs to use promises instead. To use it, you provide a concise description of the structure of the API to tell Promisify what to convert. For example, here is a sample which converts a substantial portion of the MongoDB driver API to Promises:

    var promisify = require('promisify');
    
    var promisify_collection = promisify.object({
        insert: promisify.cb_func(),
        remove: promisify.cb_func(),
        findOne: promisify.cb_func(),
        find: promisify.func(promisify.object({
            stream: promisify.func(promisify.read_stream())
        }))
    });
    
    var promisify_connection = promisify.object({
        collection: promisify.cb_func(promisify_collection),
        createCollection: promisify.cb_func(promisify_collection),
        dropCollection: promisify.cb_func()
    });
    
    var promisify_mongodb = promisify.object({
        connect: promisify.cb_func(promisify_connection)
    });
    
    var mongodb = promisify_mongodb(require('mongodb'));
    

    Promisify is built upon the when.js implementation of promises.

    Keywords

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    install

    npm i promisify

    Downloadsweekly downloads

    842

    version

    0.0.3

    license

    none

    repository

    githubgithub

    last publish

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