/// <summary>
/// Processes the specified get range query.
/// </summary>
/// <param name="getRangeQuery">The get range query.</param>
/// <param name="messageContext">The message context.</param>
/// <param name="storeContext">The store context.</param>
/// <returns>GetRangeQueryResult</returns>
internal static GetRangeQueryResult Process(GetRangeQuery getRangeQuery, MessageContext messageContext, IndexStoreContext storeContext)
{
GetRangeQueryResult getRangeQueryResult;
List<ResultItem> resultItemList = null;
bool indexExists = false;
int indexSize = -1;
int virtualCount = -1;
byte[] metadata = null;
try
{
IndexTypeMapping indexTypeMapping =
storeContext.StorageConfiguration.CacheIndexV3StorageConfig.IndexTypeMappingCollection[messageContext.TypeId];
#region Validate Query
ValidateQuery(indexTypeMapping, getRangeQuery);
#endregion
int maxItemsPerIndex = getRangeQuery.Offset - 1 + getRangeQuery.ItemNum;
Index targetIndexInfo = indexTypeMapping.IndexCollection[getRangeQuery.TargetIndexName];
#region Prepare Result
#region Extract index and apply criteria
CacheIndexInternal targetIndex = IndexServerUtils.GetCacheIndexInternal(storeContext,
messageContext.TypeId,
messageContext.PrimaryId,
getRangeQuery.IndexId,
targetIndexInfo.ExtendedIdSuffix,
getRangeQuery.TargetIndexName,
maxItemsPerIndex,
getRangeQuery.Filter,
true,
null,
false,
false,
targetIndexInfo.PrimarySortInfo,
targetIndexInfo.LocalIdentityTagList,
targetIndexInfo.StringHashCodeDictionary,
null);
#endregion
if (targetIndex != null)
{
indexSize = targetIndex.OutDeserializationContext.TotalCount;
virtualCount = targetIndex.VirtualCount;
indexExists = true;
// update perf counter
PerformanceCounters.Instance.SetCounterValue(
PerformanceCounterEnum.NumOfItemsInIndexPerGetRangeQuery,
messageContext.TypeId,
indexSize);
PerformanceCounters.Instance.SetCounterValue(
PerformanceCounterEnum.NumOfItemsReadPerGetRangeQuery,
messageContext.TypeId,
targetIndex.OutDeserializationContext.ReadItemCount);
#region Populate resultLists
resultItemList = CacheIndexInternalAdapter.GetResultItemList(targetIndex, getRangeQuery.Offset, getRangeQuery.ItemNum);
#endregion
#region Get data
if (!getRangeQuery.ExcludeData)
{
DataTierUtil.GetData(resultItemList,
storeContext,
messageContext,
indexTypeMapping.FullDataIdFieldList,
getRangeQuery.FullDataIdInfo);
}
#endregion
#region Get metadata
if (getRangeQuery.GetMetadata)
{
metadata = IndexServerUtils.GetQueryMetadata(new List<CacheIndexInternal>(1) { targetIndex },
indexTypeMapping,
messageContext.TypeId,
messageContext.PrimaryId,
getRangeQuery.IndexId,
storeContext);
}
#endregion
#endregion
}
getRangeQueryResult = new GetRangeQueryResult(indexExists, indexSize, metadata, resultItemList, virtualCount, null);
}
catch (Exception ex)
{
getRangeQueryResult = new GetRangeQueryResult(false, -1, null, null, -1, ex.Message);
LoggingUtil.Log.ErrorFormat("TypeId {0} -- Error processing GetRangeQuery : {1}", messageContext.TypeId, ex);
}
return getRangeQueryResult;
}
/// <summary>
/// Validates the query.
/// </summary>
/// <param name="indexTypeMapping">The index type mapping.</param>
/// <param name="getRangeQuery">The get range query.</param>
private static void ValidateQuery(IndexTypeMapping indexTypeMapping, GetRangeQuery getRangeQuery)
{
if (!indexTypeMapping.IndexCollection.Contains(getRangeQuery.TargetIndexName))
{
throw new Exception("Invalid TargetIndexName - " + getRangeQuery.TargetIndexName);
}
if (getRangeQuery.IndexId == null || getRangeQuery.IndexId.Length == 0)
{
throw new Exception("No IndexId present on the GetRangeQuery");
}
if ((getRangeQuery.Offset < 1) || (getRangeQuery.ItemNum < 1))
{
throw new Exception("Both GetRangeQuery.Offset and GetRangeQuery.ItemNum should be greater than 1");
}
}
