public AzureTransactionLogStorage(SerializationManager serializationManager, IOptions <AzureTransactionLogOptions> configurationOptions,
IOptions <AzureTransactionArchiveLogOptions> archiveOptions, IOptions <ClusterOptions> clusterOptions)
{
this.serializationManager = serializationManager;
this.options = configurationOptions.Value;
this.clusterOptions = clusterOptions.Value;
this.archiveLogOptions = archiveOptions.Value;
this.commitRecordPartitionKey = ArchivalRow.MakePartitionKey(this.clusterOptions.ServiceId);
}
public async Task TruncateLog(long lsn)
{
var continuationToken = default(TableContinuationToken);
var query = new TableQuery <CommitRow>().Where(TableQuery.CombineFilters(
TableQuery.GenerateFilterCondition(PartitionKey, QueryComparisons.Equal, commitRecordPartitionKey),
TableOperators.And,
TableQuery.CombineFilters(
TableQuery.GenerateFilterCondition(RowKey, QueryComparisons.LessThanOrEqual, CommitRow.MakeRowKey(lsn)),
TableOperators.And,
TableQuery.GenerateFilterCondition(RowKey, QueryComparisons.GreaterThanOrEqual, CommitRow.MinRowKey))));
var batchOperation = new TableBatchOperation();
do
{
var queryResult = await table.ExecuteQuerySegmentedAsync(query, continuationToken).ConfigureAwait(false);
continuationToken = queryResult.ContinuationToken;
if (queryResult.Results.Count > 0)
{
foreach (var row in queryResult)
{
var transactions = DeserializeCommitRecords(row.Transactions);
if (transactions.Count > 0 && transactions[transactions.Count - 1].LSN <= lsn)
{
batchOperation.Delete(row);
if (this.archiveLogOptions.ArchiveLog)
{
var archiveRow = new ArchivalRow(this.clusterOptions, row.Transactions, transactions.Select(tx => tx.TransactionId).Min(), transactions.Select(tx => tx.LSN).Min());
batchOperation.Insert(archiveRow);
}
if (batchOperation.Count == BatchOperationLimit)
{
await table.ExecuteBatchAsync(batchOperation).ConfigureAwait(false);
batchOperation = new TableBatchOperation();
}
}
else
{
break;
}
}
}
} while (continuationToken != default(TableContinuationToken));
if (batchOperation.Count > 0)
{
await table.ExecuteBatchAsync(batchOperation).ConfigureAwait(false);
}
}
public CommitRow(ClusterOptions clusterOptions, long firstLSN)
{
// All entities are in the same partition for atomic read/writes.
PartitionKey = ArchivalRow.MakePartitionKey(clusterOptions.ServiceId);
RowKey = MakeRowKey(firstLSN);
}
