@openhps/core
Version:
Open Hybrid Positioning System - Core component
73 lines • 2.48 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TimedPullNode = void 0;
const Node_1 = require("../../Node");
const unit_1 = require("../../utils/unit");
/**
* @category Flow shape
*/
class TimedPullNode extends Node_1.Node {
constructor(interval, intervalUnit = unit_1.TimeUnit.MILLISECOND, options) {
super(options);
this._pushFinished = true;
this._pullFinished = true;
this._interval = intervalUnit.convert(interval, unit_1.TimeUnit.MILLISECOND);
this.options.autoStart = this.options.autoStart || true;
this.on('push', this._onPush.bind(this));
if (this.options.autoStart) {
this.once('build', this.start.bind(this));
}
this.once('destroy', this.stop.bind(this));
}
_onPush(frame, options) {
return new Promise((resolve, reject) => {
const pushPromises = [];
pushPromises.push(...this.outlets.map((outlet) => outlet.push(frame, options)));
// Restart the timer
clearInterval(this._timer);
this._timer = setInterval(this._intervalFn.bind(this), this._interval);
this._pushFinished = false;
Promise.all(pushPromises)
.then(() => {
resolve();
})
.catch(reject)
.finally(() => {
this._pushFinished = true;
});
});
}
_intervalFn() {
if ((this._pushFinished && this._pullFinished) || !this.options.throttlePull) {
this._pullFinished = true;
Promise.all(this.inlets.map((inlet) => inlet.pull(this.options.pullOptions)))
.then(() => {
this._pullFinished = true;
})
.catch((ex) => {
this.logger('error', ex.message, ex);
});
}
}
/**
* Start the timed pull
* @returns {Promise<void>} Start promise
*/
start() {
return new Promise((resolve) => {
if (this._timer) {
this.stop();
}
this._timer = setInterval(this._intervalFn.bind(this), this._interval);
resolve();
});
}
stop() {
if (this._timer !== undefined) {
clearInterval(this._timer);
this._timer = undefined;
}
}
}
exports.TimedPullNode = TimedPullNode;
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