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2b4c551b0e
Summary: Fixes T430. Fixes T4834. Obsoletes D7641. Currently, we do some things less-well than we could: - We just let the browser queue and prioritize requests, so if you load a revision with 50 changes and then click "Award Token", the action blocks until the changes load in most/all browsers. It would be better to prioritize this action and queue it immediately. - Similarly, changes tend to load in order, even if the user has clicked to a specific file. When the user expresses a preference for a specific file, we should prioritize it. - We show a spinning GIF when waiting on requests. This is appropriate for some types of reuqests, but distracting for others. To fix this: - Queue all (or, at least, most) requests into a new queue in JX.Router. - JX.Router handles prioritizing the requests. Principally: - You can submit a request with a specific priority (500 = general content loading, 1000 = default, 2000 = explicit user action) and JX.Router will get the higher stuff fired off sooner. - You can name requests and then adjust their prorities later, if the user expresses an interest in specific results. - Only use the spinner gif for "workflow" requests, which is bascially when the user clicked something and we're waiting on the server. I think it's useful and not-annoying in this case. - Don't show any status for draft requests. - For content requests, show a subtle hipster-style top loading bar. Test Plan: - Viewed a diff with 93 changes, and clicked award token. - Prior to this patch, the action took many many seconds to resolve. - After this patch, it resolves quickly. - Viewed a diff with 93 changes and saw a pleasant subtle hipster-style loading bar. - Viewed a diff with 93 changes and typed some draft text. Previews populated fairly quickly and there was no spinner. - Viewed a diff with 93 changes and clicked something with workflow, saw a spinner after a moment. - Viewed a diff with 93 changes and clicked a file in the table of contents near the end of the list. - Prior to this patch, it took a long time to show up. - After this patch, it loads directly. Reviewers: chad, btrahan Reviewed By: btrahan Subscribers: epriestley Maniphest Tasks: T430, T4834 Differential Revision: https://secure.phabricator.com/D8979
115 lines
2.3 KiB
JavaScript
115 lines
2.3 KiB
JavaScript
/**
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* @provides javelin-router
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* @requires javelin-install
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* javelin-util
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* @javelin
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*/
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/**
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* Route requests. Primarily, this class provides a quality-of-service
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* priority queue so large numbers of background loading tasks don't block
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* interactive requests.
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*/
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JX.install('Router', {
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construct: function() {
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this._queue = [];
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},
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events: ['queue', 'start', 'done'],
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members: {
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_queue: null,
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_active: 0,
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_limit: 5,
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queue: function(routable) {
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this._queue.push(routable);
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this.invoke('queue', routable);
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this._update();
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},
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getRoutableByKey: function(key) {
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for (var ii = 0; ii < this._queue.length; ii++) {
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if (this._queue[ii].getKey() == key) {
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return this._queue[ii];
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}
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}
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return null;
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},
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/**
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* Start new requests if we have slots free for them.
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*/
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_update: function() {
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var active = this._active;
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var limit = this._limit;
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if (active >= limit) {
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// If we're already at the request limit, we can't add any more
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// requests.
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return;
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}
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// If we only have one free slot, we reserve it for a request with
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// at least priority 1000.
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var minimum;
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if ((active + 1) == limit) {
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minimum = 1000;
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} else {
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minimum = 0;
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}
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var idx = this._getNextRoutable(minimum);
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if (idx === null) {
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return;
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}
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var routable = this._queue[idx];
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this._queue.splice(idx, 1);
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routable.listen('done', JX.bind(this, this._done, routable));
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this._active++;
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routable.start();
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this.invoke('start', routable);
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this._update();
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},
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_done: function(routable) {
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this._active--;
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this.invoke('done', routable);
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this._update();
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},
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_getNextRoutable: function(minimum) {
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var best = (minimum - 1);
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var routable = null;
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for (var ii = 0; ii < this._queue.length; ii++) {
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var priority = this._queue[ii].getPriority();
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if (priority > best) {
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best = priority;
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routable = ii;
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}
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}
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return routable;
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}
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},
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statics: {
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_instance: null,
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getInstance: function() {
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if (!JX.Router._instance) {
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JX.Router._instance = new JX.Router();
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}
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return JX.Router._instance;
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}
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}
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});
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