private static async Task SyncOneEntryObject(
Tuple <JObject, List <int>, int, string> tuple,
BlobDirectory dir, String entry, List <int> statuses)
{
if (!Object.ReferenceEquals(tuple.Item2, null) && tuple.Item2.Count > 0)
{
var dirProviders = dir.GetAllProviders();
if (Object.ReferenceEquals(statuses, null))
{
statuses = dirProviders.ConvertAll(x => 0);
}
var content = tuple.Item1.ToString();
foreach (var i in tuple.Item2)
{
try
{
if (statuses[i] >= 0)
{
var item = dirProviders[i].GetBlockBlobReference(entry);
await item.UploadTextAsync(content);
Console.WriteLine($"Sync {dir.Name}/{entry} for {dirProviders[i].Provider.Name}");
statuses[i] = 1;
}
}
catch
{
var provider = dirProviders[i].Provider.Name;
Console.WriteLine($"Sync {entry} failed, the provider {provider} is not operational");
statuses[i] = -1;
}
}
}
}
/// <summary>
/// Gets the consistent JObject, this is used for JObject that are stored at multiple cloud provider without the hash (for consistency).
/// A certain key, usually time, is used to identity the freshness of the JObject, the object with the latest time is considered the latest.
/// </summary>
/// <returns>The consistent JObject, a list of blob that needs to be updated, current blob, and eTag (if exists) </returns>
/// <param name="dir">directory.</param>
/// <param name="tag">path .</param>
public static async Task <Tuple <JObject, List <int>, int, string> > GetConsistentJObject(BlobDirectory dir, String entry, String timeTag = Constant.JSonKeyTime)
{
var allDirs = dir.GetAllProviders();
var allBlobs = allDirs.ConvertAll(x => x.GetBlockBlobReference(entry));
var allTasks = allBlobs.ConvertAll(x => x.DownloadTextAsync());
try
{
await Task.WhenAll(allTasks);
} catch {};
List <Tuple <String, int> > curStrs = new List <Tuple <string, int> >();
for (int i = 0; i < allBlobs.Count; i++)
{
var task = allTasks[i];
var curBlob = allBlobs[i];
String str = null;
if (task.Status == TaskStatus.RanToCompletion)
{
str = task.Result;
}
curStrs.Add(new Tuple <String, int>(str, i));
}
;
// Nothing
if (curStrs.Count <= 0)
{
return(new Tuple <JObject, List <int>, int, string>(new JObject(), null, -1, null));
}
var curObjs = curStrs.ConvertAll(x => JsonUtils.TryParse(x.Item1));
var modTicks = curObjs.ConvertAll(x => JsonUtils.GetType <Int64>(timeTag, x, 0L));
// Console.WriteLine($"Consistency object {entry} ticks: {String.Join( ',', modTicks.ConvertAll(x => x.ToString()) )}");
var bestObj = LatestModified(modTicks);
if (bestObj < 0)
{
bestObj = 0;
}
var retObj = curObjs[bestObj];
var retIdx = curStrs[bestObj].Item2;
var eTag = allBlobs[retIdx].ETag;
var lst = new List <int>();
for (int i = 0; i < modTicks.Count; i++)
{
if (modTicks[i] < modTicks[bestObj])
{
lst.Add(curStrs[i].Item2);
}
}
if (lst.Count <= 0)
{
lst = null;
}
return(new Tuple <JObject, List <int>, int, string>(retObj, lst, retIdx, eTag));
}