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Asynchronous functions made funky!
Funk is a little module that helps you with the serial
and parallel
asynchronous pattern.
npm install funk
funk usage is really simple. You don't need to learn any DSL or weird hacks, just wrap your callbacks and let the groove do the rest.
Accepts a string that can be either parallel
or serial
, depending on the pattern you want to implement.
var funk = require('funk')('serial');
Save results that will then be recovered on the run
callback.
var funk = require('funk')('serial');
setTimeout(funk.add(function () {
funk.set('foo', 'bar');
}, 100);
funk.run(function () {
assert.equals(this.foo, 'bar');
});
Retrieve results previously saved.
var funk = require('funk')('serial');
setTimeout(funk.add(function () {
funk.set('foo', 'bar');
}, 100);
funk.run(function () {
assert.equals(funk.get('foo'), 'bar');
});
Adds a callback to be executed either in parallel
or serial
.
var funk = require('funk')('parallel');
setTimeout(funk.add(function () {
funk.set('foo', 'bar');
}, 200);
setTimeout(funk.add(function () {
funk.set('bar', 'foo');
}, 100);
funk.run(function () {
assert.equals(funk.get('foo'), 'bar');
assert.equals(funk.get('bar'), 'foo');
});
Adds the callback to funk and does nothing with the result
var funk = require('funk')('parallel');
setTimeout(funk.nothing());
setTimeout(funk.nothing());
funk.run(function () {
// both setTimeout are called
});
Adds the callback to funk and sets the value.
var funk = require('funk')('parallel');
fs.readFile("./foo.txt", 'utf-8', funk.result('file1'));
fs.readFile("./bar.txt", 'utf-8', funk.result('file2'));
funk.run(function () {
assert.equal(this.file1, 'foo\n');
assert.equal(this.file2, 'bar\n');
});
Will run all the added functions in serial
or parallel
and call callback when all are done.
this
holds all the results setted with set
and the errors
.
If a onError
callback is implemented it will be called only on getting the first error, ignorign the following requests.
// serial example without declaring `onError` callback
var funk = require('./../')('serial'),
order = 0;
funk.name = 'fleiba';
funk.results = [];
setTimeout(funk.add(function () {
order += 1;
funk.set('order_first', order);
}), 200);
fs.readFile(__dirname + "/data/doo.txt", 'utf-8', funk.add(function () {
order += 1;
funk.set('order_foo', order);
}));
fs.readFile(__dirname + "/data/gar.txt", 'utf-8', funk.add(function () {
order += 1;
funk.set('order_bar', order);
}));
funk.run(function () {
assert.equal(this.order_first, 1);
assert.equal(this.order_foo, 2);
assert.equal(this.order_bar, 3);
assert.equal(this.errors.length, 2); // none of the 2 files exists
done();
});
funk is fully tested using testosterone.
In order to run the tests type:
make