Remove unused value, remove non-functional plugin

Remove an unnecessary datum value, `time`, and remove the new style
plugin -- which does not actually work -- to prevent confusion.

Addresses
https://github.com/nasa/openmct/pull/1353#pullrequestreview-12571665

example/generator/bundle.js

@@ -92,7 +92,10 @@ define([
                     "features": "creation",
                     "model": {
                         "telemetry": {
-                            "period": 10
+                            "period": 10,
+                            "amplitude": 1,
+                            "offset": 0,
+                            "dataRateInHz": 1
                         }
                     },
                     "telemetry": {
@@ -135,6 +138,42 @@ define([
                                 "period"
                             ],
                             "pattern": "^\\d*(\\.\\d*)?$"
+                        },
+                        {
+                            "name": "Amplitude",
+                            "control": "textfield",
+                            "cssclass": "l-input-sm l-numeric",
+                            "key": "amplitude",
+                            "required": true,
+                            "property": [
+                                "telemetry",
+                                "amplitude"
+                            ],
+                            "pattern": "^\\d*(\\.\\d*)?$"
+                        },
+                        {
+                            "name": "Offset",
+                            "control": "textfield",
+                            "cssclass": "l-input-sm l-numeric",
+                            "key": "offset",
+                            "required": true,
+                            "property": [
+                                "telemetry",
+                                "offset"
+                            ],
+                            "pattern": "^\\d*(\\.\\d*)?$"
+                        },
+                        {
+                            "name": "Data Rate (hz)",
+                            "control": "textfield",
+                            "cssclass": "l-input-sm l-numeric",
+                            "key": "dataRateInHz",
+                            "required": true,
+                            "property": [
+                                "telemetry",
+                                "dataRateInHz"
+                            ],
+                            "pattern": "^\\d*(\\.\\d*)?$"
                         }
                     ]
                 }

example/generator/src/GeneratorProvider.js

@@ -0,0 +1,83 @@
+/*****************************************************************************
+ * 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.
+ *****************************************************************************/
+
+define([
+    './WorkerInterface'
+], function (
+    WorkerInterface
+) {
+
+    var REQUEST_DEFAULTS = {
+        amplitude: 1,
+        period: 10,
+        offset: 0,
+        dataRateInHz: 1
+    };
+
+    function GeneratorProvider() {
+        this.workerInterface = new WorkerInterface();
+    }
+
+    GeneratorProvider.prototype.canProvideTelemetry = function (domainObject) {
+        return domainObject.type === 'generator';
+    };
+
+    GeneratorProvider.prototype.makeWorkerRequest = function (domainObject, request) {
+        var props = [
+            'amplitude',
+            'period',
+            'offset',
+            'dataRateInHz'
+        ];
+
+        var workerRequest = {};
+
+        props.forEach(function (prop) {
+            if (domainObject.telemetry && domainObject.telemetry.hasOwnProperty(prop)) {
+                workerRequest[prop] = domainObject.telemetry[prop];
+            }
+            if (request.hasOwnProperty(prop)) {
+                workerRequest[prop] = request[prop];
+            }
+            if (!workerRequest[prop]) {
+                workerRequest[prop] = REQUEST_DEFAULTS[prop];
+            }
+            workerRequest[prop] = Number(workerRequest[prop]);
+        });
+
+        return workerRequest;
+    };
+
+    GeneratorProvider.prototype.request = function (domainObject, request) {
+        var workerRequest = this.makeWorkerRequest(domainObject, request);
+        workerRequest.start = request.start;
+        workerRequest.end = request.end;
+        return this.workerInterface.request(workerRequest);
+    };
+
+    GeneratorProvider.prototype.subscribe = function (domainObject, callback, request) {
+        var workerRequest = this.makeWorkerRequest(domainObject, request);
+        return this.workerInterface.subscribe(workerRequest, callback);
+    };
+
+    return GeneratorProvider;
+});

example/generator/src/SinewaveTelemetryProvider.js

@@ -24,96 +24,47 @@
 /**
  * Module defining SinewaveTelemetryProvider. Created by vwoeltje on 11/12/14.
  */
-define(
-    ["./SinewaveTelemetrySeries"],
-    function (SinewaveTelemetrySeries) {
-        "use strict";
+define([
+    "./SinewaveTelemetrySeries",
+    "./GeneratorProvider"
+], function (
+    SinewaveTelemetrySeries,
+    GeneratorProvider
+) {
 
-        /**
-         *
-         * @constructor
-         */
-        function SinewaveTelemetryProvider($q, $timeout) {
-            var subscriptions = [],
-                generating = false;
+    function SinewaveTelemetryProvider() {
+        this.provider = new GeneratorProvider();
+    }
 
-            //
-            function matchesSource(request) {
-                return request.source === "generator";
-            }
-
-            // Used internally; this will be repacked by doPackage
-            function generateData(request) {
-                return {
-                    key: request.key,
-                    telemetry: new SinewaveTelemetrySeries(request)
+    SinewaveTelemetryProvider.prototype.requestTelemetry = function (requests) {
+        if (requests[0].source !== 'generator') {
+            return Promise.resolve({});
+        }
+        return this.provider.request({}, requests[0])
+            .then(function (data) {
+                var res = {
+                    generator: {}
                 };
-            }
+                res.generator[requests[0].key] = new SinewaveTelemetrySeries(data);
+                return res;
+            });
+    };
 
-            //
-            function doPackage(results) {
-                var packaged = {};
-                results.forEach(function (result) {
-                    packaged[result.key] = result.telemetry;
-                });
-                // Format as expected (sources -> keys -> telemetry)
-                return { generator: packaged };
-            }
-
-            function requestTelemetry(requests) {
-                return $timeout(function () {
-                    return doPackage(requests.filter(matchesSource).map(generateData));
-                }, 0);
-            }
-
-            function handleSubscriptions() {
-                subscriptions.forEach(function (subscription) {
-                    var requests = subscription.requests;
-                    subscription.callback(doPackage(
-                        requests.filter(matchesSource).map(generateData)
-                    ));
-                });
-            }
-
-            function startGenerating() {
-                generating = true;
-                $timeout(function () {
-                    handleSubscriptions();
-                    if (generating && subscriptions.length > 0) {
-                        startGenerating();
-                    } else {
-                        generating = false;
-                    }
-                }, 1000);
-            }
-
-            function subscribe(callback, requests) {
-                var subscription = {
-                    callback: callback,
-                    requests: requests
-                };
-
-                function unsubscribe() {
-                    subscriptions = subscriptions.filter(function (s) {
-                        return s !== subscription;
-                    });
-                }
-
-                subscriptions.push(subscription);
-
-                if (!generating) {
-                    startGenerating();
-                }
-
-                return unsubscribe;
-            }
-
-            return {
-                requestTelemetry: requestTelemetry,
-                subscribe: subscribe
-            };
+    SinewaveTelemetryProvider.prototype.subscribe = function (callback, requests) {
+        if (requests[0].source !== 'generator') {
+            return function unsubscribe() {};
         }
 
-        return SinewaveTelemetryProvider;
-    }
-);
+        function wrapper(data) {
+            var res = {
+                generator: {}
+            };
+            res.generator[requests[0].key] = new SinewaveTelemetrySeries(data);
+            callback(res);
+        }
+
+        return this.provider.subscribe({}, wrapper, requests[0]);
+    };
+
+    return SinewaveTelemetryProvider;
+});

example/generator/src/SinewaveTelemetrySeries.js

@@ -24,55 +24,52 @@
 /**
  * Module defining SinewaveTelemetry. Created by vwoeltje on 11/12/14.
  */
-define(
-    ['./SinewaveConstants'],
-    function (SinewaveConstants) {
+define([
+
+], function (
+
+) {
         "use strict";
 
-        var ONE_DAY = 60 * 60 * 24,
-            firstObservedTime = Math.floor(SinewaveConstants.START_TIME / 1000);
-
-        /**
-         *
-         * @constructor
-         */
-        function SinewaveTelemetrySeries(request) {
-            var timeOffset = (request.domain === 'yesterday') ? ONE_DAY : 0,
-                latestTime = Math.floor(Date.now() / 1000) - timeOffset,
-                firstTime = firstObservedTime - timeOffset,
-                endTime = (request.end !== undefined) ?
-                        Math.floor(request.end / 1000) : latestTime,
-                count = Math.min(endTime, latestTime) - firstTime,
-                period = +request.period || 30,
-                generatorData = {},
-                requestStart = (request.start === undefined) ? firstTime :
-                        Math.max(Math.floor(request.start / 1000), firstTime),
-                offset = requestStart - firstTime;
-
-            if (request.size !== undefined) {
-                offset = Math.max(offset, count - request.size);
+        function SinewaveTelemetrySeries(data) {
+            if (!Array.isArray(data)) {
+                data = [data];
             }
-
-            generatorData.getPointCount = function () {
-                return count - offset;
-            };
-
-            generatorData.getDomainValue = function (i, domain) {
-                // delta uses the same numeric values as the default domain,
-                // so it's not checked for here, just formatted for display
-                // differently.
-                return (i + offset) * 1000 + firstTime * 1000 -
-                    (domain === 'yesterday' ? (ONE_DAY * 1000) : 0);
-            };
-
-            generatorData.getRangeValue = function (i, range) {
-                range = range || "sin";
-                return Math[range]((i + offset) * Math.PI * 2 / period);
-            };
-
-            return generatorData;
+            this.data = data;
         }
 
+        SinewaveTelemetrySeries.prototype.getPointCount = function () {
+            return this.data.length;
+        };
+
+
+        SinewaveTelemetrySeries.prototype.getDomainValue = function (
+            index,
+            domain
+        ) {
+            domain = domain || 'time';
+
+            return this.getDatum(index)[domain];
+        };
+
+        SinewaveTelemetrySeries.prototype.getRangeValue = function (
+            index,
+            range
+        ) {
+            range = range || 'sin';
+            return this.getDatum(index)[range];
+        };
+
+        SinewaveTelemetrySeries.prototype.getDatum = function (index) {
+            if (index > this.data.length || index < 0) {
+                throw new Error('IndexOutOfRange: index not available in series.');
+            }
+            return this.data[index];
+        };
+
+        SinewaveTelemetrySeries.prototype.getData = function () {
+            return this.data;
+        };
+
         return SinewaveTelemetrySeries;
-    }
-);
+});

example/generator/src/WorkerInterface.js

@@ -0,0 +1,115 @@
+/*****************************************************************************
+ * 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.
+ *****************************************************************************/
+
+define([
+    'text!./generatorWorker.js',
+    'uuid'
+], function (
+    workerText,
+    uuid
+) {
+
+    var workerBlob = new Blob(
+        [workerText],
+        {type: 'application/javascript'}
+    );
+    var workerUrl = URL.createObjectURL(workerBlob);
+
+    function WorkerInterface() {
+        this.worker = new Worker(workerUrl);
+        this.worker.onmessage = this.onMessage.bind(this);
+        this.callbacks = {};
+    }
+
+    WorkerInterface.prototype.onMessage = function (message) {
+        message = message.data;
+        var callback = this.callbacks[message.id];
+        if (callback) {
+            if (callback(message)) {
+                delete this.callbacks[message.id];
+            }
+        }
+    };
+
+    WorkerInterface.prototype.dispatch = function (request, data, callback) {
+        var message = {
+            request: request,
+            data: data,
+            id: uuid()
+        };
+
+        if (callback) {
+            this.callbacks[message.id] = callback;
+        }
+
+        this.worker.postMessage(message);
+
+        return message.id;
+    };
+
+    WorkerInterface.prototype.request = function (request) {
+        var deferred = {};
+        var promise = new Promise(function (resolve, reject) {
+            deferred.resolve = resolve;
+            deferred.reject = reject;
+        });
+
+        function callback(message) {
+            if (message.error) {
+                deferred.reject(message.error);
+            } else {
+                deferred.resolve(message.data);
+            }
+            return true;
+        }
+
+        this.dispatch('request', request, callback);
+
+        return promise;
+    };
+
+    WorkerInterface.prototype.subscribe = function (request, cb) {
+        var isCancelled = false;
+
+        var callback = function (message) {
+            if (isCancelled) {
+                return true;
+            }
+            cb(message.data);
+        };
+
+        var messageId = this.dispatch('subscribe', request, callback)
+
+        return function () {
+            isCancelled = true;
+            this.dispatch('unsubscribe', {
+                id: messageId
+            });
+        }.bind(this);
+
+    };
+
+
+
+
+    return WorkerInterface;
+});

example/generator/src/generatorWorker.js

@@ -0,0 +1,150 @@
+/*****************************************************************************
+ * 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 self*/
+
+(function () {
+
+
+    var handlers = {
+        subscribe: onSubscribe,
+        unsubscribe: onUnsubscribe,
+        request: onRequest
+    };
+
+    var subscriptions = {};
+
+    function workSubscriptions(timestamp) {
+        var now = Date.now();
+        var nextWork = Math.min.apply(Math, Object.values(subscriptions).map(function (subscription) {
+            return subscription(now);
+        }));
+        var wait = nextWork - now;
+        if (wait < 0) {
+            wait = 0;
+        }
+
+        if (Number.isFinite(wait)) {
+            setTimeout(workSubscriptions, wait);
+        }
+    }
+
+    function onSubscribe(message) {
+        var data = message.data;
+
+        var start = Date.now();
+        var step = 1000 / data.dataRateInHz;
+        var nextStep = start - (start % step) + step;
+
+        function work(now) {
+            while (nextStep < now) {
+                self.postMessage({
+                    id: message.id,
+                    data: {
+                        utc: nextStep,
+                        yesterday: nextStep - 60*60*24*1000,
+                        delta: 60*60*24*1000,
+                        sin: sin(nextStep, data.period, data.amplitude, data.offset),
+                        cos: cos(nextStep, data.period, data.amplitude, data.offset)
+                    }
+                });
+                nextStep += step;
+            }
+            return nextStep;
+        }
+
+        subscriptions[message.id] = work;
+        workSubscriptions();
+    }
+
+    function onUnsubscribe(message) {
+        delete subscriptions[message.data.id];
+    }
+
+    function onRequest(message) {
+        var data = message.data;
+        if (!data.start || !data.end) {
+            throw new Error('missing start and end!');
+        }
+
+        var now = Date.now();
+        var start = data.start;
+        var end = data.end > now ? now : data.end;
+        var amplitude = data.amplitude;
+        var period = data.period;
+        var offset = data.offset;
+        var dataRateInHz = data.dataRateInHz;
+
+        var step = 1000 / dataRateInHz;
+        var nextStep = start - (start % step) + step;
+
+        var data = [];
+
+        for (; nextStep < end; nextStep += step) {
+            data.push({
+                utc: nextStep,
+                yesterday: nextStep - 60*60*24*1000,
+                delta: 60*60*24*1000,
+                sin: sin(nextStep, period, amplitude, offset),
+                cos: cos(nextStep, period, amplitude, offset)
+            });
+        }
+        self.postMessage({
+            id: message.id,
+            data: data
+        });
+    }
+
+    function cos(timestamp, period, amplitude, offset) {
+        return amplitude *
+            Math.cos(timestamp / period / 1000 * Math.PI * 2) + offset;
+    }
+
+    function sin(timestamp, period, amplitude, offset) {
+        return amplitude *
+            Math.sin(timestamp / period / 1000 * Math.PI * 2) + offset;
+    }
+
+    function sendError(error, message) {
+        self.postMessage({
+            error: error.name + ': ' + error.message,
+            message: message,
+            id: message.id
+        });
+    }
+
+    self.onmessage = function handleMessage(event) {
+        var message = event.data;
+        var handler = handlers[message.request];
+
+        if (!handler) {
+            sendError(new Error('unknown message type'), message);
+        } else {
+            try {
+                handler(message);
+            } catch (e) {
+                sendError(e, message);
+            }
+        }
+    };
+
+}());