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[Persistence] Add example provider
...to serve as a secondary persistence store.
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},
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"priority": "preferred"
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}
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],
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"components": [
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{
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"provides": "persistenceService",
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"type": "provider",
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"implementation": "ScratchPersistenceProvider.js",
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"depends": [ "$q" ]
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}
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]
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}
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}
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77
example/scratchpad/src/ScratchPersistenceProvider.js
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77
example/scratchpad/src/ScratchPersistenceProvider.js
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/*****************************************************************************
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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,window*/
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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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* The ScratchPersistenceProvider keeps JSON documents in memory
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* and provides a persistence interface, but changes are lost on reload.
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* @memberof example/scratchpad
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* @constructor
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* @implements {PersistenceService}
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* @param q Angular's $q, for promises
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*/
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function ScratchPersistenceProvider($q) {
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this.$q = $q;
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this.table = {};
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}
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ScratchPersistenceProvider.prototype.listSpaces = function () {
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return this.$q.when(['scratch']);
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};
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ScratchPersistenceProvider.prototype.listObjects = function (space) {
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return this.$q.when(
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space === 'scratch' ? Object.keys(this.table) : []
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);
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};
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ScratchPersistenceProvider.prototype.createObject = function (space, key, value) {
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if (space === 'scratch') {
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this.table[key] = JSON.stringify(value);
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}
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return this.$q.when(space === 'scratch');
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};
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ScratchPersistenceProvider.prototype.readObject = function (space, key) {
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return this.$q
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.when(space === 'scratch' ? this.table[key] : undefined);
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};
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ScratchPersistenceProvider.prototype.deleteObject = function (space, key, value) {
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if (space === 'scratch') {
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delete this.table[key];
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}
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return this.$q.when(space === 'scratch');
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};
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ScratchPersistenceProvider.prototype.updateObject =
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ScratchPersistenceProvider.prototype.createObject;
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return ScratchPersistenceProvider;
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}
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);
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