Update wildcard.media, support collective.celery, remove plone.app.async

[seanupton]

We need to create a celery async worker (zope instance) on qits2 that uses:

• Redis for Celery queue/store, connection over SSH tunnel to qits1
• sshfs (FUSE) for filesystem access to BLOB storage, as we already do now.
• PostgreSQL over TLS connection, as we already do now.
• Deprecates or removes use of plone.app.async in favor of using collective.celery.
  • In order to do this, we need to install a newer version of wildcard.media, and test in our Plone 4.3.x environment, prior to our Plone 5 upgrade.
  • We should fork wildcard.media (again) on github.
  • We will then need to graft on the following customizations to wildcard.media:
    1. Download link below player (we use fork now, we want to avoid this and do a pull request).
    2. JavaScript shim for hyperlinking to timestamps (see below, also include this in pull request).

wildcard.media becomes test scenario for using, configuring Celery and collective.celery -- once this is done, we can look at running asynchronous handlers for form save of multi-record forms (data point computation).

JavaScript timestamp hyperlink shim

(function ($) {
  var hash = window.location.hash.slice(1),
      isVideoContent = $('body').hasClass('portaltype-wildcardvideo');
  if (isVideoContent && hash) {
      var parts = hash.split(':'),
          min = (parts.length) ? parseInt(parts[0], 10) : 0,
          sec = (parts.length > 1) ? parseInt(parts[1], 10) : 0,
          rawSec = min * 60 + sec,
          video = $('video.active');
      if (video.length && !isNan(rawSec)) {
          video[0].setCurrentTime(rawSec);
      }
  }
}(jQuery));

[seanupton]

Closed with comment that updated scope involves:

• Continuing to use plone.app.async, for now. We can look again at Celery later.
• Using plone.app.async requires using zc.async fork to deal with silly UUID package dependency that was causing us issues with reliably random UUIDs for things like form records. We can and will continue to do this until we move off plone.app.async.