mirror of
https://github.com/titanscouting/tra-analysis.git
synced 2024-12-29 10:19:11 +00:00
94 lines
4.5 KiB
JavaScript
94 lines
4.5 KiB
JavaScript
'use strict';
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.default = cargo;
|
|
|
|
var _queue = require('./internal/queue');
|
|
|
|
var _queue2 = _interopRequireDefault(_queue);
|
|
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
|
|
|
/**
|
|
* A cargo of tasks for the worker function to complete. Cargo inherits all of
|
|
* the same methods and event callbacks as [`queue`]{@link module:ControlFlow.queue}.
|
|
* @typedef {Object} CargoObject
|
|
* @memberOf module:ControlFlow
|
|
* @property {Function} length - A function returning the number of items
|
|
* waiting to be processed. Invoke like `cargo.length()`.
|
|
* @property {number} payload - An `integer` for determining how many tasks
|
|
* should be process per round. This property can be changed after a `cargo` is
|
|
* created to alter the payload on-the-fly.
|
|
* @property {Function} push - Adds `task` to the `queue`. The callback is
|
|
* called once the `worker` has finished processing the task. Instead of a
|
|
* single task, an array of `tasks` can be submitted. The respective callback is
|
|
* used for every task in the list. Invoke like `cargo.push(task, [callback])`.
|
|
* @property {Function} saturated - A callback that is called when the
|
|
* `queue.length()` hits the concurrency and further tasks will be queued.
|
|
* @property {Function} empty - A callback that is called when the last item
|
|
* from the `queue` is given to a `worker`.
|
|
* @property {Function} drain - A callback that is called when the last item
|
|
* from the `queue` has returned from the `worker`.
|
|
* @property {Function} idle - a function returning false if there are items
|
|
* waiting or being processed, or true if not. Invoke like `cargo.idle()`.
|
|
* @property {Function} pause - a function that pauses the processing of tasks
|
|
* until `resume()` is called. Invoke like `cargo.pause()`.
|
|
* @property {Function} resume - a function that resumes the processing of
|
|
* queued tasks when the queue is paused. Invoke like `cargo.resume()`.
|
|
* @property {Function} kill - a function that removes the `drain` callback and
|
|
* empties remaining tasks from the queue forcing it to go idle. Invoke like `cargo.kill()`.
|
|
*/
|
|
|
|
/**
|
|
* Creates a `cargo` object with the specified payload. Tasks added to the
|
|
* cargo will be processed altogether (up to the `payload` limit). If the
|
|
* `worker` is in progress, the task is queued until it becomes available. Once
|
|
* the `worker` has completed some tasks, each callback of those tasks is
|
|
* called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)
|
|
* for how `cargo` and `queue` work.
|
|
*
|
|
* While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers
|
|
* at a time, cargo passes an array of tasks to a single worker, repeating
|
|
* when the worker is finished.
|
|
*
|
|
* @name cargo
|
|
* @static
|
|
* @memberOf module:ControlFlow
|
|
* @method
|
|
* @see [async.queue]{@link module:ControlFlow.queue}
|
|
* @category Control Flow
|
|
* @param {AsyncFunction} worker - An asynchronous function for processing an array
|
|
* of queued tasks. Invoked with `(tasks, callback)`.
|
|
* @param {number} [payload=Infinity] - An optional `integer` for determining
|
|
* how many tasks should be processed per round; if omitted, the default is
|
|
* unlimited.
|
|
* @returns {module:ControlFlow.CargoObject} A cargo object to manage the tasks. Callbacks can
|
|
* attached as certain properties to listen for specific events during the
|
|
* lifecycle of the cargo and inner queue.
|
|
* @example
|
|
*
|
|
* // create a cargo object with payload 2
|
|
* var cargo = async.cargo(function(tasks, callback) {
|
|
* for (var i=0; i<tasks.length; i++) {
|
|
* console.log('hello ' + tasks[i].name);
|
|
* }
|
|
* callback();
|
|
* }, 2);
|
|
*
|
|
* // add some items
|
|
* cargo.push({name: 'foo'}, function(err) {
|
|
* console.log('finished processing foo');
|
|
* });
|
|
* cargo.push({name: 'bar'}, function(err) {
|
|
* console.log('finished processing bar');
|
|
* });
|
|
* cargo.push({name: 'baz'}, function(err) {
|
|
* console.log('finished processing baz');
|
|
* });
|
|
*/
|
|
function cargo(worker, payload) {
|
|
return (0, _queue2.default)(worker, 1, payload);
|
|
}
|
|
module.exports = exports['default']; |