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74 lines
2.9 KiB
JavaScript
74 lines
2.9 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT Web is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT Web includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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/*global define*/
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define(
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[],
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function () {
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"use strict";
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/**
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* Supports TelemetrySubscription. Provides a simple data structure
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* (with a pool-like interface) that aggregates key-value pairs into
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* one large object, overwriting new values as necessary. Stands
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* in contrast to the TelemetryQueue, which will avoid overwriting
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* values.
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* @constructor
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*/
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function TelemetryTable() {
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var table;
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return {
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/**
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* Check if any value groups remain in this pool.
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* @return {boolean} true if value groups remain
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*/
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isEmpty: function () {
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return !table;
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},
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/**
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* Retrieve the next value group from this pool.
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* This gives an object containing key-value pairs,
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* where keys and values correspond to the arguments
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* given to previous put functions.
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* @return {object} key-value pairs
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*/
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poll: function () {
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var t = table;
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table = undefined;
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return t;
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},
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/**
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* Put a key-value pair into the pool.
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* @param {string} key the key to store the value under
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* @param {*} value the value to store
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*/
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put: function (key, value) {
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table = table || {};
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table[key] = value;
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}
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};
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}
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return TelemetryTable;
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}
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); |