openmct/example/profiling/src/DigestIndicator.js

81 lines
2.6 KiB
JavaScript

/*****************************************************************************
* Open MCT, Copyright (c) 2014-2016, United States Government
* as represented by the Administrator of the National Aeronautics and Space
* Administration. All rights reserved.
*
* Open MCT is licensed under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* Open MCT includes source code licensed under additional open source
* licenses. See the Open Source Licenses file (LICENSES.md) included with
* this source code distribution or the Licensing information page available
* at runtime from the About dialog for additional information.
*****************************************************************************/
/*global define*/
define(
[],
function () {
"use strict";
/**
* Displays the number of digests that have occurred since the
* indicator was first instantiated.
* @constructor
* @param $interval Angular's $interval
* @implements {Indicator}
*/
function DigestIndicator($interval, $rootScope) {
var digests = 0,
displayed = 0,
start = Date.now();
function update() {
var now = Date.now(),
secs = (now - start) / 1000;
displayed = Math.round(digests / secs);
start = now;
digests = 0;
}
function increment() {
digests += 1;
}
$rootScope.$watch(increment);
// Update state every second
$interval(update, 1000);
// Provide initial state, too
update();
return {
getGlyph: function () {
return ".";
},
getGlyphClass: function () {
return undefined;
},
getText: function () {
return displayed + " digests/sec";
},
getDescription: function () {
return "";
}
};
}
return DigestIndicator;
}
);