protected override void OnThreadUnSafeEventFired(object source, CharacterSessionDataChangedEventArgs args)
{
if (Logger.IsInfoEnabled)
{
Logger.Info($"Starting process to download world.");
}
UnityAsyncHelper.UnityMainThreadContext.PostAsync(async() =>
{
long worldId = 0;
try
{
//TODO: Handle failure
ProjectVersionStage.AssertAlpha();
//TODO: Handle throwing/error
//We need to know the world the zone is it, so we can request a download URL for it.
var worldConfig = await ZoneDataService.GetZoneWorldConfigurationAsync(args.ZoneIdentifier)
.ConfigureAwaitFalse();
if (!worldConfig.isSuccessful)
{
throw new InvalidOperationException($"Failed to query World Configuration for ZoneId: {args.ZoneIdentifier}");
}
worldId = worldConfig.Result.WorldId;
//With the worldid we can get the download URL.
ContentDownloadURLResponse urlDownloadResponse = await ContentService.RequestWorldDownloadUrl(worldId)
.ConfigureAwaitFalse();
if (Logger.IsInfoEnabled)
{
Logger.Info($"World Download Url: {urlDownloadResponse.DownloadURL}");
}
//Can't do web request not on the main thread, sadly.
await new UnityYieldAwaitable();
WorldDownloader downloader = new WorldDownloader(Logger);
await downloader.DownloadAsync(urlDownloadResponse.DownloadURL, urlDownloadResponse.Version, o =>
{
OnWorldDownloadBegins?.Invoke(this, new WorldDownloadBeginEventArgs(o));
});
}
catch (Exception e)
{
if (Logger.IsErrorEnabled)
{
Logger.Error($"Failed to query for Download URL for ZoneId: {args.ZoneIdentifier} WorldId: {worldId} (0 if never succeeded request). Error: {e.Message}");
}
throw;
}
});
}
public async Task OnGameInitialized()
{
//TODO: Handle throwing/error
ContentDownloadURLResponse downloadUrlResponse = await ContentService.RequestWorldDownloadUrl(WorldConfig.WorldId)
.ConfigureAwaitFalse();
if (Logger.IsInfoEnabled)
{
Logger.Info($"World Download Url: {downloadUrlResponse.DownloadURL}");
}
//Can't do web request not on the main thread, sadly.
await new UnityYieldAwaitable();
//TODO: Handle failure.
WorldDownloader downloader = new WorldDownloader(Logger);
//At this point after this finishes the world shoud be downloaded.
await downloader.DownloadAsync(downloadUrlResponse.DownloadURL, downloadUrlResponse.Version, null, true); //important that the world loads ontop of the existing scene.
}
/// <inheritdoc />
public async Task <IPrefabContentResourceHandle> LoadContentPrefabAsync(long contentId)
{
//If it's already available, we can just return immediately
if (IsContentResourceAvailable(contentId))
{
return(TryLoadContentPrefab(contentId));
}
ContentDownloadURLResponse downloadUrlResponse = await RequestDownloadURL(contentId);
//TODO: Handle failure
TaskCompletionSource <IPrefabContentResourceHandle> completionSource = new TaskCompletionSource <IPrefabContentResourceHandle>();
//Asset bundle requests can sadly only happen on the main thread, so we must join the main thread.
await new UnityYieldAwaitable();
//TODO: We should handle caching, versioning and etc here.
UnityWebRequestAsyncOperation asyncOperation = UnityWebRequestAssetBundle.GetAssetBundle(downloadUrlResponse.DownloadURL, (uint)downloadUrlResponse.Version, 0).SendWebRequest();
//TODO: We should render these operations to the loading screen UI.
asyncOperation.completed += operation =>
{
//When we first get back on the main thread, the main concern
//is that this resource manager may be from the last scene
//and that the client may have moved on
//to avoid this issues we check disposal state
//and do nothing, otherwise if we check AFTER then we just have to release the assetbundle immediately anyway.
if (isDisposed)
{
//Just tell anyone awaiting this that it is canceled. They should handle that case, not us.
completionSource.SetCanceled();
return;
}
//GetContent will throw if the assetbundle has already been loaded.
//So to prevent this from occuring due to multiple requests for the
//content async we will check, on this main thread, via a write lock.
lock (SyncObj)
{
//We're on the main thread again. So, we should check if another
//request already got the bundle
if (IsContentResourceAvailable(contentId))
{
completionSource.SetResult(TryLoadContentPrefab(contentId));
return;
}
try
{
//otherwise, we still don't have it so we should initialize it.
this.ResourceHandleCache[contentId] = new ReferenceCountedPrefabContentResourceHandle(DownloadHandlerAssetBundle.GetContent(asyncOperation.webRequest));
completionSource.SetResult(TryLoadContentPrefab(contentId)); //we assume this will work now.
}
catch (Exception e)
{
if (Logger.IsErrorEnabled)
{
Logger.Error($"Failed to load AssetBundle for Content: {contentId}. Reason: {e.ToString()}");
}
//Don't rethrow, causing build breaking.
}
}
};
return(await completionSource.Task
.ConfigureAwaitFalse());
}
