private Tuple <Stamp, Stamp> SplitStamp(Stamp currentStamp, int required, string tableName)
{
var stampToInclude = new Stamp(currentStamp.Id + "a");
var eventCount = 0;
var stampPartIndex = 0;
for (; eventCount + currentStamp.PartCounts[stampPartIndex] < required; ++stampPartIndex)
{
stampToInclude.PartCounts.Add(currentStamp.PartCounts[stampPartIndex]);
}
var remainder = required - eventCount;
var task = SplitStampPart(currentStamp, stampPartIndex, remainder, tableName);
task.Wait();
return(task.Result);
}
private async Task <Tuple <Stamp, Stamp> > SplitStampPart(Stamp currentStamp, int stampPartIndex, int count, string tableName)
{
var query = new TableQuery <StampPartEntity>
{
FilterString = $"PartitionKey {QueryComparisons.Equal} {currentStamp.Id}"
};
var token = new TableContinuationToken();
var proxy = new TableStorageProxy(_config, tableName);
var stampParts = await proxy.ExecuteQuerySegmented(query, token);
var partToSplit = stampParts.Skip(stampPartIndex).First();
var batch = new TableBatchOperation
{
TableOperation.Delete(partToSplit)
};
var events = Tuple.Create(string.Join(",", partToSplit.Events.Take(count)), string.Join(",", partToSplit.Events.Skip(count).Select(e => e)));
batch.Add(TableOperation.InsertOrReplace(new StampPartEntity(partToSplit.PartitionKey, partToSplit.RowKey + 'a')
{
Events = events.Item1
}));
batch.Add(TableOperation.InsertOrReplace(new StampPartEntity(partToSplit.PartitionKey, partToSplit.RowKey + 'b')
{
Events = events.Item2
}));
await _tableProxy.ExecuteBatchAsync(batch);
var split = Tuple.Create(new Stamp(currentStamp.Id), new Stamp(currentStamp.Id));
split.Item1.PartCounts.AddRange(currentStamp.PartCounts.Take(stampPartIndex));
split.Item1.PartCounts.Add(events.Item1.Length);
split.Item2.PartCounts.Add(events.Item2.Length);
split.Item2.PartCounts.AddRange(currentStamp.PartCounts.Skip(stampPartIndex).Select(p => p));
return(split);
}