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[Examples] #359 Updated to attempt connection to remote data source and fallback to local if unavailable

Browse Source 
Minor change to readme

Fixed JSLint errors

More JSLint errors

[Example] Rems data integration - disabled bundle by default.

[Examples] REMS data integration - added newlines at end of files

[Example] Added time conductor support to REMS data integration

Added caching of results

[Examples] Added domain format to REMS data #359

[Example] #637 Added local proxy to app.js to allow cross-origin requests

Updated readme
This commit is contained in:
Henry
2016-01-22 12:37:50 -08:00
parent c091063b83
commit 4674918b4b
12 changed files with 119 additions and 70 deletions
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104
example/msl/src/RemsTelemetryServerAdapter.js
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@ -20,13 +20,18 @@
* at runtime from the About dialog for additional information.
*****************************************************************************/
/*global define*/
/*jslint es5: true */
define(
["./MSLDataDictionary"],
function (MSLDataDictionary) {
[
"./MSLDataDictionary",
"module"
],
function (MSLDataDictionary, module) {
"use strict";
var TERRESTRIAL_DATE = "terrestrial_date";
var TERRESTRIAL_DATE = "terrestrial_date",
LOCAL_DATA = "../data/rems.json";
/**
* Fetches historical data from the REMS instrument on the Curiosity
@ -37,12 +42,14 @@ define(
* @param REMS_WS_URL The location of the REMS telemetry data.
* @constructor
*/
function RemsTelemetryServerAdapter($q, $http, REMS_WS_URL) {
this.historyData = {},
function RemsTelemetryServerAdapter($q, $http, $log, REMS_WS_URL) {
this.localDataURI = module.uri.substring(0, module.uri.lastIndexOf('/') + 1) + LOCAL_DATA;
this.deferreds = {};
this.REMS_WS_URL = REMS_WS_URL;
this.$q = $q;
this.$http = $http;
this.$log = $log;
this.cache = undefined;
}
/**
@ -56,43 +63,64 @@ define(
* given request ID.
* @private
*/
RemsTelemetryServerAdapter.prototype.requestHistory = function(id) {
var self = this;
RemsTelemetryServerAdapter.prototype.requestHistory = function(request) {
var self = this,
id = request.key,
deferred = this.$q.defer();
return this.$http.get(this.REMS_WS_URL).then(function(response){
function processResponse(response){
var data = [];
/*
* Refresh history data on each request so that it's always
* current.
* Currently all data is returned for entire history of the mission. Cache response to avoid unnecessary re-queries.
*/
self.historyData = {};
self.cache = response;
/*
* History data is organised by Sol. Iterate over sols...
*/
response.data.soles.forEach(function(solData){
/*
* Each sol contains a number of properties for each
* piece of data available, eg. min ground temperature,
* avg air pressure, etc.
* Check that valid data exists
*/
Object.keys(solData).forEach(function (prop) {
self.historyData[prop] = self.historyData[prop] || [];
if (!isNaN(solData[id])) {
/*
* Check that valid data exists
* Append each data point to the array of values
* for this data point property (min. temp, etc).
*/
if (!isNaN(solData[prop])) {
/*
* Append each data point to the array of values
* for this data point property (min. temp, etc).
*/
self.historyData[prop].unshift({
date: Date.parse(solData[TERRESTRIAL_DATE]),
value: solData[prop]
});
}
});
data.unshift({
date: Date.parse(solData[TERRESTRIAL_DATE]),
value: solData[id]
});
}
});
self.deferreds[id].resolve({id: id, values: self.historyData[id]});
});
return data;
}
function fallbackToLocal() {
self.$log.warn("Loading REMS data failed, probably due to" +
" cross origin policy. Falling back to local data");
return self.$http.get(self.localDataURI);
}
//Filter results to match request parameters
function filterResults(results) {
return results.filter(function(result){
return result.date >= (request.start || Number.MIN_VALUE) &&
result.date <= (request.end || Number.MAX_VALUE);
});
}
function packageAndResolve(results){
deferred.resolve({id: id, values: results});
}
this.$q.when(this.cache || this.$http.get(this.REMS_WS_URL))
.catch(fallbackToLocal)
.then(processResponse)
.then(filterResults)
.then(packageAndResolve);
return deferred.promise;
};
/**
@ -103,16 +131,12 @@ define(
* @param id The telemetry data point key to be queried.
* @returns {Promise | Array<RemsTelemetryValue>} that resolves with an Array of {@link RemsTelemetryValue} objects for the request data key.
*/
RemsTelemetryServerAdapter.prototype.history = function(id) {
this.deferreds[id] = this.deferreds[id] || this.$q.defer();
if (this.historyData[id]) {
this.deferreds[id].resolve({id: id, values: this.historyData[id]});
} else {
this.historyData = {};
this.requestHistory(id);
}
return this.deferreds[id].promise;
RemsTelemetryServerAdapter.prototype.history = function(request) {
var id = request.key;
return this.requestHistory(request);
};
return RemsTelemetryServerAdapter;
});
}
);