/// <summary>
/// Gets the specified shardlet mapped to a specific spid.
/// </summary>
/// <param name="shardlet">The shardlet.</param>
/// <param name="spid">The spid.</param>
/// <returns>AzureShardletConnection.</returns>
public AzureShardletConnection Get(Shardlet shardlet, int spid)
{
var partitionKey = shardlet.DistributionKey.ToString(CultureInfo.InvariantCulture);
var rowKey = AzureShardletConnection.GetRowKey(shardlet.Catalog, spid);
var cacheShardletConnection =
AzureCache.Get <CacheShardletConnection>(GetCacheKey(_cacheType, partitionKey, rowKey));
if (cacheShardletConnection != null)
{
return(cacheShardletConnection.ToAzureShardletConnection());
}
var condition1 = TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey);
var condition2 = TableQuery.GenerateFilterCondition("RowKey", QueryComparisons.Equal, rowKey);
var condition = TableQuery.CombineFilters(condition1, TableOperators.And, condition2);
var query =
new TableQuery <AzureShardletConnection>()
.Where(condition);
IEnumerable <AzureShardletConnection> result = null;
RetryPolicyFactory.GetDefaultAzureStorageRetryPolicy()
.ExecuteAction(() => result = _table.ExecuteQuery(query));
var azureShardletConnection = result.FirstOrDefault();
Cache(azureShardletConnection);
return(azureShardletConnection);
}
/// <summary>
/// Deletes the rows associated with the collection of SPIDs for the specified shardlet.
/// </summary>
/// <param name="shardlet">The shardlet.</param>
/// <param name="spids">The spids.</param>
public void Delete(Shardlet shardlet, IEnumerable <short> spids)
{
var array = spids.ToArray();
var batches = Enumerable.Range(0, array.Count()).GroupBy(i => i / BatchSize, i => array[i]);
var partitionKey = shardlet.DistributionKey.ToString(CultureInfo.InvariantCulture);
foreach (var batch in batches)
{
var batchOperation = new TableBatchOperation();
foreach (var spid in batch)
{
var rowKey = AzureShardletConnection.GetRowKey(shardlet.Catalog, spid);
var entity =
new DynamicTableEntity
{
RowKey = rowKey,
PartitionKey = partitionKey,
ETag = "*"
};
batchOperation.Delete(entity);
}
RetryPolicyFactory.GetDefaultAzureStorageRetryPolicy()
.ExecuteAction(() => _table.ExecuteBatch(batchOperation));
foreach (var spid in batch)
{
AzureCache.Remove(GetCacheKey(_cacheType,
partitionKey,
AzureShardletConnection.GetRowKey(shardlet.Catalog, spid)));
}
}
}