Pool

Pool for JavaScript.

Installing

Using npm:

npm install xy-pool

Example

Implementing producer-consumer model.

    const Pool = require('xy-pool');

    const instance = new Pool({ maxSize: 10 });

    // create a product
    const product = producer();
    // put the product into the pool
    instance.push(product);

    // get a product from the pool
    consume(instance.pop());

Start async task with pool. It can limit the number of task.

    const Pool = require('xy-pool');

    const instance = new Pool({ maxSize: 10 });

    instance.on('poolenter', onPoolEnter);

    // start the task when the task enter the pool
    function onPoolEnter(key, task) {
        if (typeof task === 'function') {
            task(key, task);
        }
    }

    function post(key) {
        http.post(...)
            .then(...)
            .catch(...)
            .finally(function() { instance.pop(key) }); // remove the task when the async task is ok
    }

    // put the task into pool
    instance.push(post);