public (bool MoreWorkFound, Index.CanContinueBatchResult BatchContinuationResult) Execute(QueryOperationContext queryContext, TransactionOperationContext indexContext,
Lazy <IndexWriteOperation> writeOperation, IndexingStatsScope stats, CancellationToken token)
{
var maxTimeForDocumentTransactionToRemainOpen = Debugger.IsAttached == false
? _configuration.MaxTimeForDocumentTransactionToRemainOpen.AsTimeSpan
: TimeSpan.FromMinutes(15);
var moreWorkFound = false;
var batchContinuationResult = Index.CanContinueBatchResult.None;
var totalProcessedCount = 0;
foreach (var collection in _index.Collections)
{
using (var collectionStats = stats.For("Collection_" + collection))
{
var lastMappedEtag = _indexStorage.ReadLastIndexedEtag(indexContext.Transaction, collection);
if (_logger.IsInfoEnabled)
{
_logger.Info($"Executing map for '{_index.Name}'. Collection: {collection} LastMappedEtag: {lastMappedEtag:#,#;;0}.");
}
var inMemoryStats = _index.GetStats(collection);
var lastEtag = lastMappedEtag;
var resultsCount = 0;
var pageSize = int.MaxValue;
var sw = new Stopwatch();
var keepRunning = true;
var lastCollectionEtag = -1L;
while (keepRunning)
{
using (queryContext.OpenReadTransaction())
{
sw.Restart();
if (lastCollectionEtag == -1)
{
lastCollectionEtag = _index.GetLastItemEtagInCollection(queryContext, collection);
}
var items = GetItemsEnumerator(queryContext, collection, lastEtag, pageSize);
using (var itemEnumerator = _index.GetMapEnumerator(items, collection, indexContext, collectionStats, _index.Type))
{
while (true)
{
if (itemEnumerator.MoveNext(queryContext.Documents, out IEnumerable mapResults, out var etag) == false)
{
if (etag > lastEtag)
{
lastEtag = etag.Value;
}
collectionStats.RecordBatchCompletedReason(IndexingWorkType.Map, "No more documents to index");
keepRunning = false;
break;
}
token.ThrowIfCancellationRequested();
var current = itemEnumerator.Current;
totalProcessedCount++;
collectionStats.RecordMapAttempt();
stats.RecordDocumentSize(current.Size);
if (_logger.IsInfoEnabled && totalProcessedCount % 8192 == 0)
{
_logger.Info($"Executing map for '{_index.Name}'. Processed count: {totalProcessedCount:#,#;;0} etag: {lastEtag:#,#;;0}.");
}
lastEtag = current.Etag;
inMemoryStats.UpdateLastEtag(lastEtag, isTombstone: false);
try
{
current.SkipLuceneDelete = _indexStorage.LowerThanLastDatabaseEtagOnIndexCreation(current.Etag);
var numberOfResults = _index.HandleMap(current, mapResults,
writeOperation, indexContext, collectionStats);
resultsCount += numberOfResults;
collectionStats.RecordMapSuccess();
_index.MapsPerSec?.MarkSingleThreaded(numberOfResults);
}
catch (Exception e) when(e.IsIndexError())
{
itemEnumerator.OnError();
_index.ErrorIndexIfCriticalException(e);
collectionStats.RecordMapError();
if (_logger.IsInfoEnabled)
{
_logger.Info($"Failed to execute mapping function on '{current.Id}' for '{_index.Name}'.", e);
}
collectionStats.AddMapError(current.Id, $"Failed to execute mapping function on {current.Id}. " +
$"Exception: {e}");
}
var parameters = new CanContinueBatchParameters(collectionStats, IndexingWorkType.Map, queryContext, indexContext, writeOperation,
lastEtag, lastCollectionEtag, totalProcessedCount, sw);
batchContinuationResult = _index.CanContinueBatch(in parameters, ref maxTimeForDocumentTransactionToRemainOpen);
if (batchContinuationResult != Index.CanContinueBatchResult.True)
{
keepRunning = batchContinuationResult == Index.CanContinueBatchResult.RenewTransaction;
break;
}
if (totalProcessedCount >= pageSize)
{
keepRunning = false;
break;
}
}
}
}
}
if (lastMappedEtag == lastEtag)
{
// the last mapped etag hasn't changed
continue;
}
moreWorkFound = true;
if (_logger.IsInfoEnabled)
{
_logger.Info($"Executed map for '{_index.Name}' index and '{collection}' collection. Got {resultsCount:#,#;;0} map results in {collectionStats.Duration.TotalMilliseconds:#,#;;0} ms.");
}
if (_index.Type.IsMap())
{
_index.SaveLastState();
_indexStorage.WriteLastIndexedEtag(indexContext.Transaction, collection, lastEtag);
}
else
{
_mapReduceContext.ProcessedDocEtags[collection] = lastEtag;
}
}
}
return(moreWorkFound, batchContinuationResult);
}