public IReadOnlyCollection <EnqueueResult> Enqueue(IEnumerable <EnqueueItem> items)
{
lock (_lock)
{
var result = new List <EnqueueResult>();
foreach (var item in items)
{
var meta = _messagingMetas[item.DeviceId];
int enqueueIdx = meta.EnqueueIndex % meta.QueueSize;
var queueEntry = _queueEntries[item.DeviceId][enqueueIdx];
queueEntry.Payload = item.Payload;
queueEntry.Timestamp = item.Timestamp;
queueEntry.SenderDeviceId = item.SenderDeviceId;
var resultItem = new EnqueueResult
{
Id = item.DeviceId,
MessageId = meta.EnqueueIndex,
};
meta.Version++;
meta.EnqueueIndex++;
if (meta.DequeueIndex + meta.QueueSize <= meta.EnqueueIndex)
{
meta.DequeueIndex++;
meta.Peek = false;
}
resultItem.DequeueIndex = meta.DequeueIndex;
resultItem.EnqueueIndex = meta.EnqueueIndex;
resultItem.Peek = meta.Peek;
resultItem.Version = meta.Version;
result.Add(resultItem);
}
return(result);
}
}
public IReadOnlyCollection <EnqueueResult> Enqueue(IEnumerable <EnqueueItem> items)
{
if (!items.Any())
{
return(new List <EnqueueResult>());
}
var dataTable = new DataTable("EnqueueItemTable");
dataTable.Columns.Add("DeviceId", typeof(long));
dataTable.Columns.Add("Payload", typeof(byte[]));
dataTable.Columns.Add("Timestamp", typeof(DateTime));
dataTable.Columns.Add("SenderUid", typeof(string));
foreach (var item in items)
{
var dataRow = dataTable.NewRow();
dataRow[0] = item.DeviceId;
dataRow[1] = item.Payload;
dataRow[2] = item.Timestamp;
dataRow[3] = item.SenderDeviceId;
dataTable.Rows.Add(dataRow);
}
using (var sqlConnection = new SqlConnection(_connectionString))
{
sqlConnection.Open();
using (var sqlCommand = new SqlCommand("Enqueue", sqlConnection))
{
sqlCommand.CommandType = CommandType.StoredProcedure;
sqlCommand.Parameters.Add(new SqlParameter("@Messages", dataTable));
var enqueueResults = new List <EnqueueResult>();
using (var reader = sqlCommand.ExecuteReader())
{
var colDeviceId = reader.GetOrdinal("DeviceId");
var colDequeueIndex = reader.GetOrdinal("DequeueIndex");
var colEnqueueIndex = reader.GetOrdinal("EnqueueIndex");
var colPeek = reader.GetOrdinal("Peek");
var colVersion = reader.GetOrdinal("Version");
var colMessageId = reader.GetOrdinal("MessageId");
while (reader.Read())
{
var enqueueResult = new EnqueueResult
{
Id = (long)reader[colDeviceId],
DequeueIndex = (int)reader[colDequeueIndex],
EnqueueIndex = (int)reader[colEnqueueIndex],
Peek = (bool)reader[colPeek],
Version = (int)reader[colVersion],
MessageId = (int)reader[colMessageId]
};
enqueueResults.Add(enqueueResult);
}
}
return(enqueueResults);
}
}
}