/// <summary>
/// Processes the random query.
/// </summary>
/// <param name="message">The message.</param>
/// <param name="messageContext">The message context.</param>
private void ProcessRandomQuery(RelayMessage message, MessageContext messageContext)
{
RandomQueryResult randomQueryResult = RandomQueryProcessor.Process(message.GetQueryObject <RandomQuery>(),
messageContext,
storeContext);
bool compressOption = storeContext.GetCompressOption(message.TypeId);
message.Payload = new RelayPayload(message.TypeId,
message.Id,
Serializer.Serialize(randomQueryResult, compressOption),
compressOption);
}
/// <summary>
/// Processes the specified random query.
/// </summary>
/// <param name="randomQuery">The random query.</param>
/// <param name="messageContext">The message context.</param>
/// <param name="storeContext">The store context.</param>
/// <returns>RandomQueryResult</returns>
internal static RandomQueryResult Process(RandomQuery randomQuery, MessageContext messageContext, IndexStoreContext storeContext)
{
RandomQueryResult randomQueryResult;
List <ResultItem> resultItemList = null;
bool indexExists = false;
int indexSize = -1;
int virtualCount = -1;
byte[] metadata = null;
MetadataPropertyCollection metadataPropertyCollection = null;
try
{
IndexTypeMapping indexTypeMapping =
storeContext.StorageConfiguration.CacheIndexV3StorageConfig.IndexTypeMappingCollection[messageContext.TypeId];
#region Validate Query
ValidateQuery(indexTypeMapping, randomQuery);
#endregion
Index targetIndexInfo = indexTypeMapping.IndexCollection[randomQuery.TargetIndexName];
int indexCap = targetIndexInfo.MaxIndexSize;
#region Prepare Result
#region Extract index and apply criteria
if (indexTypeMapping.MetadataStoredSeperately)
{
IndexServerUtils.GetMetadataStoredSeperately(indexTypeMapping,
messageContext.TypeId,
messageContext.PrimaryId,
randomQuery.IndexId,
storeContext,
out metadata,
out metadataPropertyCollection);
}
CacheIndexInternal targetIndex = IndexServerUtils.GetCacheIndexInternal(storeContext,
messageContext.TypeId,
messageContext.PrimaryId,
randomQuery.IndexId,
targetIndexInfo.ExtendedIdSuffix,
randomQuery.TargetIndexName,
0,
randomQuery.Filter,
true,
randomQuery.IndexCondition,
false,
false,
targetIndexInfo.PrimarySortInfo,
targetIndexInfo.LocalIdentityTagList,
targetIndexInfo.StringHashCodeDictionary,
null,
targetIndexInfo.IsMetadataPropertyCollection,
metadataPropertyCollection,
randomQuery.DomainSpecificProcessingType,
storeContext.DomainSpecificConfig,
null,
null,
false);
#endregion
if (targetIndex != null)
{
indexSize = targetIndex.OutDeserializationContext.TotalCount;
virtualCount = targetIndex.VirtualCount;
indexExists = true;
// update performance counters
PerformanceCounters.Instance.SetCounterValue(
PerformanceCounterEnum.NumOfItemsInIndexPerRandomQuery,
messageContext.TypeId,
indexSize);
PerformanceCounters.Instance.SetCounterValue(
PerformanceCounterEnum.NumOfItemsReadPerRandomQuery,
messageContext.TypeId,
targetIndex.OutDeserializationContext.ReadItemCount);
#region Populate resultLists
int indexItemCount = targetIndex.Count;
int resultListCount = Math.Min(randomQuery.Count, indexItemCount);
IEnumerable <int> itemPositionList = Algorithm.RandomSubset(new Random(), 0, indexItemCount - 1, resultListCount);
resultItemList = CacheIndexInternalAdapter.GetResultItemList(targetIndex, itemPositionList);
#endregion
#region Get data
if (!randomQuery.ExcludeData)
{
DataTierUtil.GetData(resultItemList,
null,
storeContext,
messageContext,
indexTypeMapping.FullDataIdFieldList,
randomQuery.FullDataIdInfo);
}
#endregion
#region Get metadata
if (randomQuery.GetMetadata && !indexTypeMapping.MetadataStoredSeperately)
{
IndexServerUtils.GetMetadataStoredWithIndex(indexTypeMapping,
new List <CacheIndexInternal>(1)
{
targetIndex
},
out metadata,
out metadataPropertyCollection);
}
#endregion
#endregion
}
randomQueryResult = new RandomQueryResult(indexExists, indexSize, metadata, metadataPropertyCollection, resultItemList, virtualCount, indexCap, null);
}
catch (Exception ex)
{
randomQueryResult = new RandomQueryResult(false, -1, null, null, null, -1, 0, ex.Message);
LoggingUtil.Log.ErrorFormat("TypeId {0} -- Error processing RandomQuery : {1}", messageContext.TypeId, ex);
}
return(randomQueryResult);
}
