1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = cargo;
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7 |
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8 | var _queue = require('./internal/queue.js');
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9 |
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10 | var _queue2 = _interopRequireDefault(_queue);
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11 |
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12 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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13 |
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14 | /**
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15 | * Creates a `cargoQueue` object with the specified payload. Tasks added to the
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16 | * cargoQueue will be processed together (up to the `payload` limit) in `concurrency` parallel workers.
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17 | * If the all `workers` are in progress, the task is queued until one becomes available. Once
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18 | * a `worker` has completed some tasks, each callback of those tasks is
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19 | * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)
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20 | * for how `cargo` and `queue` work.
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21 | *
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22 | * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers
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23 | * at a time, and [`cargo`]{@link module:ControlFlow.cargo} passes an array of tasks to a single worker,
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24 | * the cargoQueue passes an array of tasks to multiple parallel workers.
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25 | *
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26 | * @name cargoQueue
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27 | * @static
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28 | * @memberOf module:ControlFlow
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29 | * @method
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30 | * @see [async.queue]{@link module:ControlFlow.queue}
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31 | * @see [async.cargo]{@link module:ControlFLow.cargo}
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32 | * @category Control Flow
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33 | * @param {AsyncFunction} worker - An asynchronous function for processing an array
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34 | * of queued tasks. Invoked with `(tasks, callback)`.
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35 | * @param {number} [concurrency=1] - An `integer` for determining how many
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36 | * `worker` functions should be run in parallel. If omitted, the concurrency
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37 | * defaults to `1`. If the concurrency is `0`, an error is thrown.
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38 | * @param {number} [payload=Infinity] - An optional `integer` for determining
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39 | * how many tasks should be processed per round; if omitted, the default is
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40 | * unlimited.
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41 | * @returns {module:ControlFlow.QueueObject} A cargoQueue object to manage the tasks. Callbacks can
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42 | * attached as certain properties to listen for specific events during the
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43 | * lifecycle of the cargoQueue and inner queue.
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44 | * @example
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45 | *
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46 | * // create a cargoQueue object with payload 2 and concurrency 2
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47 | * var cargoQueue = async.cargoQueue(function(tasks, callback) {
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48 | * for (var i=0; i<tasks.length; i++) {
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49 | * console.log('hello ' + tasks[i].name);
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50 | * }
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51 | * callback();
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52 | * }, 2, 2);
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53 | *
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54 | * // add some items
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55 | * cargoQueue.push({name: 'foo'}, function(err) {
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56 | * console.log('finished processing foo');
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57 | * });
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58 | * cargoQueue.push({name: 'bar'}, function(err) {
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59 | * console.log('finished processing bar');
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60 | * });
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61 | * cargoQueue.push({name: 'baz'}, function(err) {
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62 | * console.log('finished processing baz');
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63 | * });
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64 | * cargoQueue.push({name: 'boo'}, function(err) {
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65 | * console.log('finished processing boo');
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66 | * });
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67 | */
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68 | function cargo(worker, concurrency, payload) {
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69 | return (0, _queue2.default)(worker, concurrency, payload);
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70 | }
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71 | module.exports = exports.default; |
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