public async Task <ITask> GetTask(CancellationToken token)
{
await EnsureInit();
ITransaction tx = null;
ITask ret = null;
try
{
tx = ServiceFabricUtils.CreateTransaction();
await ServiceFabricUtils.DoWithTimeoutRetry(async() =>
{
var result = await m_queue.TryDequeueAsync(tx, TimeSpan.FromSeconds(10), m_cancel);
if (result.HasValue)
{
ret = Utils.Deserialize <ITask>(result.Value);
}
});
if (ret == null)
{
tx.Dispose(); return(null);
}
m_tx[ret] = tx;
return(ret);
}
catch
{
ReleaseTx(ret, tx);
throw;
}
}
private async Task <IEnumerable <Chunk> > GetChunks_impl(Guid?replicaId)
{
using (var tx = ServiceFabricUtils.CreateTransaction())
{
retry:
try
{
if (replicaId.HasValue)
{
var res = await m_chunktable.TryGetValueAsync(tx, replicaId.Value);
if (res.HasValue)
{
return(Utils.Deserialize <Chunk[]>(res.Value));
}
}
else
{
var res = await m_chunktable.CreateEnumerableAsync(tx, EnumerationMode.Unordered);
var enumerator = res.GetAsyncEnumerator();
List <Chunk> chunks = new List <Chunk>();
while (await enumerator.MoveNextAsync(m_cancel))
{
chunks.AddRange(Utils.Deserialize <Chunk[]>(enumerator.Current.Value));
}
return(chunks);
}
}
catch (TimeoutException) { await Task.Delay(1000); goto retry; }
catch (Exception ex) { Log.WriteLine(LogLevel.Error, "{0}", $"ServiceFabricChunkTable: {ex.ToString()}"); }
finally { await tx.CommitAsync(); }
}
return(null);
}
/// <inheritdocs/>
public async Task DeleteEntry(Guid replicaId)
{
await EnsureChunkTables();
using (var tx = ServiceFabricUtils.CreateTransaction())
{
await ServiceFabricUtils.DoWithTimeoutRetry(
async() => await m_chunktable.TryRemoveAsync(tx, replicaId));
}
}
public async Task PostTask(ITask task)
{
await EnsureInit();
using (var tx = ServiceFabricUtils.CreateTransaction())
{
await ServiceFabricUtils.DoWithTimeoutRetry(
async() => await m_queue.EnqueueAsync(tx, Utils.Serialize(task), TimeSpan.FromSeconds(10), m_cancel),
async() => await m_tagCounter.AddOrUpdateAsync(tx, task.Tag, 1, (k, v) => v + 1),
async() => await tx.CommitAsync());
}
}
/// <inheritdocs/>
public async Task SetChunks(Guid replicaId, IEnumerable <Chunk> chunks)
{
var payload = Utils.Serialize(chunks.ToArray());
await EnsureChunkTables();
using (var tx = ServiceFabricUtils.CreateTransaction())
{
await ServiceFabricUtils.DoWithTimeoutRetry(
async() => await m_chunktable.SetAsync(tx, replicaId, payload),
async() => await tx.CommitAsync());
}
}
public async Task Wait(Guid tag)
{
await EnsureInit();
await ServiceFabricUtils.DoWithTimeoutRetry(
async() =>
{
using (var tx = ServiceFabricUtils.CreateTransaction())
{
int cnt = 0;
var result = await m_tagCounter.TryGetValueAsync(tx, tag, TimeSpan.FromSeconds(10), m_cancel);
if (result.HasValue)
{
cnt = result.Value;
}
if (cnt != 0)
{
throw new TimeoutException();
}
}
});
}