public override void Transition(LocalizedResource rsrc, ResourceEvent @event)
{
// Note: assumes that localizing container must succeed or fail
ResourceReleaseEvent relEvent = (ResourceReleaseEvent)@event;
rsrc.Release(relEvent.GetContainer());
}
/*
* Synchronizing this method for avoiding races due to multiple ResourceEvent's
* coming to LocalResourcesTracker from Public/Private localizer and
* Resource Localization Service.
*/
public virtual void Handle(ResourceEvent @event)
{
lock (this)
{
LocalResourceRequest req = @event.GetLocalResourceRequest();
LocalizedResource rsrc = localrsrc[req];
switch (@event.GetType())
{
case ResourceEventType.Localized:
{
if (useLocalCacheDirectoryManager)
{
Sharpen.Collections.Remove(inProgressLocalResourcesMap, req);
}
break;
}
case ResourceEventType.Request:
{
if (rsrc != null && (!IsResourcePresent(rsrc)))
{
Log.Info("Resource " + rsrc.GetLocalPath() + " is missing, localizing it again");
RemoveResource(req);
rsrc = null;
}
if (null == rsrc)
{
rsrc = new LocalizedResource(req, dispatcher);
localrsrc[req] = rsrc;
}
break;
}
case ResourceEventType.Release:
{
if (null == rsrc)
{
// The container sent a release event on a resource which
// 1) Failed
// 2) Removed for some reason (ex. disk is no longer accessible)
ResourceReleaseEvent relEvent = (ResourceReleaseEvent)@event;
Log.Info("Container " + relEvent.GetContainer() + " sent RELEASE event on a resource request "
+ req + " not present in cache.");
return;
}
break;
}
case ResourceEventType.LocalizationFailed:
{
/*
* If resource localization fails then Localized resource will be
* removed from local cache.
*/
RemoveResource(req);
break;
}
case ResourceEventType.Recovered:
{
if (rsrc != null)
{
Log.Warn("Ignoring attempt to recover existing resource " + rsrc);
return;
}
rsrc = RecoverResource(req, (ResourceRecoveredEvent)@event);
localrsrc[req] = rsrc;
break;
}
}
if (rsrc == null)
{
Log.Warn("Received " + @event.GetType() + " event for request " + req + " but localized resource is missing"
);
return;
}
rsrc.Handle(@event);
// Remove the resource if its downloading and its reference count has
// become 0 after RELEASE. This maybe because a container was killed while
// localizing and no other container is referring to the resource.
// NOTE: This should NOT be done for public resources since the
// download is not associated with a container-specific localizer.
if (@event.GetType() == ResourceEventType.Release)
{
if (rsrc.GetState() == ResourceState.Downloading && rsrc.GetRefCount() <= 0 && rsrc
.GetRequest().GetVisibility() != LocalResourceVisibility.Public)
{
RemoveResource(req);
}
}
if (@event.GetType() == ResourceEventType.Localized)
{
if (rsrc.GetLocalPath() != null)
{
try
{
stateStore.FinishResourceLocalization(user, appId, BuildLocalizedResourceProto(rsrc
));
}
catch (IOException ioe)
{
Log.Error("Error storing resource state for " + rsrc, ioe);
}
}
else
{
Log.Warn("Resource " + rsrc + " localized without a location");
}
}
}
}
