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added cache warming on startup

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This commit is contained in:
R. Aidan Campbell 2016-09-03 13:51:56 -04:00
parent 2df5527cc0
commit bfea4dbf5f
2 changed files with 25 additions and 3 deletions
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3
static/js/index.js
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@ -74,9 +74,9 @@ function restoreUiAfterNaClLoad() {
}
function beginBackgroundPollingOfHost(host) {
host.warmBoxArtCache();
if (host.online) {
$("#hostgrid-" + host.serverUid).removeClass('host-cell-inactive');
// The host was already online. Just start polling in the background now.
activePolls[host.serverUid] = window.setInterval(function() {
// every 5 seconds, poll at the address we know it was live at
@ -90,7 +90,6 @@ function beginBackgroundPollingOfHost(host) {
}, 5000);
} else {
$("#hostgrid-" + host.serverUid).addClass('host-cell-inactive');
// The host was offline, so poll immediately.
host.pollServer(function () {
if (host.online) {

25
static/js/utils.js
View File

@ -293,12 +293,35 @@ NvHTTP.prototype = {
return this.getAppListWithCacheFlush();
},
warmBoxArtCache: function () {
if (Object.keys(this._memCachedBoxArtArray).length != 0) {
console.log('box art cache already warmed.');
return;
}
if (chrome.storage) {
chrome.storage.local.get('boxArtCache', function(JSONCachedBoxArtArray) {
var storedBoxArtArray; // load cached data if it exists
if (JSONCachedBoxArtArray.boxArtCache != undefined) {
storedBoxArtArray = JSONCachedBoxArtArray.boxArtCache;
for (var key in storedBoxArtArray) {
this._memCachedBoxArtArray[key] = _base64ToArrayBuffer(storedBoxArtArray[key]);
}
console.log('box art cache warmed.');
} else {
console.log('WARN: no box art found in storage. Cannot warm cache!');
return;
}
}.bind(this));
}
},
// returns the box art of the given appID.
// three layers of response time are possible: memory cached (in javascript), storage cached (in chrome.storage.local), and streamed (host sends binary over the network)
getBoxArt: function (appId) {
// TODO: unfortunately we do N lookups from storage cache, each of them filling up the memory cache.
// TODO: unfortunately we do N lookups from storage cache, each of them filling up the memory cache.
// once the first round of calls are all made, each subsequent request hits this and returns from memory cache
if (this._memCachedBoxArtArray[appId] !== undefined) {
return new Promise(function (resolve, reject) {