A utility class to execute promises in parallel.
npm install node-promise-parallel> Utility to run a batch of Promises in parallel.
OS X, Windows & Linux
``sh`
npm install node-promise-parallel --save
Use a function (generator) to queue up promises to be executed in serial. The function works as a factory yielding the Promises to be executed in parallel.
`sh
const PromiseParallel = require('node-promise-parallel');
// Example generator function to create Promises to be executed by the queue.
// The generator have to yeild a Promise.
function* promiseGenerator() {
for(let i = 0; i < 10; i++) {
yield new Promise(resolve => {
setTimeout(resolve, (Math.random()*100)+1);
});
}
}
// Create a PromiseParallel, executing 3 Promises in parallel with a waitTime of 1000ms before staring the next one.
const pq = new PromiseParallel(promiseGenerator, 3, 1000);
// Listen on the events emitted from the PromiseParallel.
// 'resolved' - successfully resolved Promise.
// 'rejected' - the Promise was rejected.
// 'completed' - the generator is completed (no new Promises to consume)
pq.on('resolved', res => {
console.log(Result that was resolved: ${res})Error occured: ${err}
}).on('rejected', err => {
console.log();
}).on('completed', () => {
console.log('Generator is completed.');
});
pq.start(); // Start the execution
`
_For a complete tutorial on how this was created have a look at my blog:_ https://www.snappyjs.com/2018/03/23/js-how-to-use-generators-and-iterators
No dependencies outside of node.
`sh`
npm install node-promise-parallel --save
npm test
npm sample
* 1.0.0
* RELEASE: Initial release.
Tommy Dronkers -
E-mail: tommy@snappyjs.com
Homepage: https://www.snappyjs.com
Distributed under the MIT license. See LICENSE for more information.
https://github.com/snappyjs/node-promise-parallel
1. Fork it (
2. Create your feature branch (git checkout -b feature/fooBar)git commit -am 'Add some fooBar'
3. Commit your changes ()git push origin feature/fooBar`)
4. Push to the branch (
5. Create a new Pull Request