private void ReplicateDocument(DocumentStorageActions actions, string id, JObject metadata, JObject document, string src)
{
var existingDoc = actions.DocumentByKey(id, null);
if (existingDoc == null)
{
log.DebugFormat("New document {0} replicated successfully from {1}", id, src);
actions.AddDocument(id, Guid.Empty, document, metadata);
return;
}
var existingDocumentIsInConflict = existingDoc.Metadata[ReplicationConstants.RavenReplicationConflict] != null;
if (existingDocumentIsInConflict == false && // if the current document is not in conflict, we can continue without having to keep conflict semantics
(IsDirectChildOfCurrentDocument(existingDoc, metadata))) // this update is direct child of the existing doc, so we are fine with overwriting this
{
log.DebugFormat("Existing document {0} replicated successfully from {1}", id, src);
actions.AddDocument(id, null, document, metadata);
return;
}
var newDocumentConflictId = id + "/conflicts/" + metadata.Value<string>("@etag");
metadata.Add(ReplicationConstants.RavenReplicationConflict, JToken.FromObject(true));
actions.AddDocument(newDocumentConflictId, null, document, metadata);
if (existingDocumentIsInConflict) // the existing document is in conflict
{
log.DebugFormat("Conflicted document {0} has a new version from {1}, adding to conflicted documents", id, src);
// just update the current doc with the new conflict document
existingDoc.DataAsJson.Value<JArray>("Conflicts").Add(JToken.FromObject(newDocumentConflictId));
actions.AddDocument(id, existingDoc.Etag, existingDoc.DataAsJson, existingDoc.Metadata);
return;
}
log.DebugFormat("Existing document {0} is in conflict with replicated version from {1}, marking document as conflicted", id, src);
// we have a new conflict
// move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id +"/conflicts/"+existingDoc.Etag;
existingDoc.Metadata.Add(ReplicationConstants.RavenReplicationConflict, JToken.FromObject(true));
actions.AddDocument(existingDocumentConflictId, null, existingDoc.DataAsJson, existingDoc.Metadata);
actions.AddDocument(id, null,
new JObject(
new JProperty("Conflicts", new JArray(existingDocumentConflictId, newDocumentConflictId))),
new JObject(
new JProperty(ReplicationConstants.RavenReplicationConflict, true),
new JProperty("@Http-Status-Code", 409),
new JProperty("@Http-Status-Description", "Conflict")
));
}
private bool? MoveNext(IEnumerator en, StatefulEnumerableWrapper<object> innerEnumerator, WorkContext context,
DocumentStorageActions actions)
{
try
{
actions.IncrementIndexingAttempt();
var moveNext = en.MoveNext();
if (moveNext == false)
actions.DecrementIndexingAttempt();
return moveNext;
}
catch (Exception e)
{
actions.IncrementIndexingFailure();
context.AddError(name,
TryGetDocKey(innerEnumerator.Current),
e.Message
);
log.WarnFormat(e, "Failed to execute indexing function on {0} on {1}", name,
GetDocId(innerEnumerator));
}
return null;
}
protected IEnumerable<object> RobustEnumeration(IEnumerable<object> input, IndexingFunc func,
DocumentStorageActions actions, WorkContext context)
{
var wrapped = new StatefulEnumerableWrapper<dynamic>(input.GetEnumerator());
IEnumerator<object> en = func(wrapped).GetEnumerator();
do
{
var moveSuccessful = MoveNext(en, wrapped, context, actions);
if (moveSuccessful == false)
yield break;
if (moveSuccessful == true)
yield return en.Current;
else
en = func(wrapped).GetEnumerator();
} while (true);
}
public abstract void IndexDocuments(AbstractViewGenerator viewGenerator, IEnumerable<object> documents,
WorkContext context,
DocumentStorageActions actions);
public override void IndexDocuments(
AbstractViewGenerator viewGenerator,
IEnumerable<dynamic> documents,
WorkContext context,
DocumentStorageActions actions)
{
actions.SetCurrentIndexStatsTo(name);
var count = 0;
Func<object, object> documentIdFetcher = null;
var reduceKeys = new HashSet<string>();
var documentsWrapped = documents.Select(doc =>
{
var documentId = doc.__document_id;
foreach (var reduceKey in actions.DeleteMappedResultsForDocumentId((string)documentId, name))
{
reduceKeys.Add(reduceKey);
}
return doc;
});
foreach (var doc in RobustEnumeration(documentsWrapped, viewGenerator.MapDefinition, actions, context))
{
count++;
documentIdFetcher = CreateDocumentIdFetcherIfNeeded(documentIdFetcher, doc);
var docIdValue = documentIdFetcher(doc);
if (docIdValue == null)
throw new InvalidOperationException("Could not find document id for this document");
var reduceValue = viewGenerator.GroupByExtraction(doc);
if (reduceValue == null)
{
log.DebugFormat("Field {0} is used as the reduce key and cannot be null, skipping document {1}", viewGenerator.GroupByExtraction, docIdValue);
continue;
}
var reduceKey = ReduceKeyToString(reduceValue);
var docId = docIdValue.ToString();
reduceKeys.Add(reduceKey);
string data = GetMapedData(doc);
log.DebugFormat("Mapped result for '{0}': '{1}'", name, data);
var hash = ComputeHash(name, reduceKey);
actions.PutMappedResult(name, docId, reduceKey, data, hash);
actions.IncrementSuccessIndexing();
}
foreach (var reduceKey in reduceKeys)
{
actions.AddTask(new ReduceTask
{
Index = name,
ReduceKey = reduceKey
});
}
log.DebugFormat("Mapped {0} documents for {1}", count, name);
}
public void ReduceDocuments(AbstractViewGenerator viewGenerator,
IEnumerable<object> mappedResults,
WorkContext context,
DocumentStorageActions actions,
string reduceKey)
{
actions.SetCurrentIndexStatsTo(name);
var count = 0;
Write(indexWriter =>
{
indexWriter.DeleteDocuments(new Term("__reduce_key", reduceKey));
context.IndexUpdateTriggers.Apply(trigger => trigger.OnIndexEntryDeleted(name, reduceKey));
PropertyDescriptorCollection properties = null;
foreach (var doc in RobustEnumeration(mappedResults, viewGenerator.ReduceDefinition, actions, context))
{
count++;
var fields = GetFields(doc, ref properties);
var luceneDoc = new Document();
luceneDoc.Add(new Field("__reduce_key", reduceKey, Field.Store.NO, Field.Index.NOT_ANALYZED));
foreach (var field in fields)
{
luceneDoc.Add(field);
}
context.IndexUpdateTriggers.Apply(trigger => trigger.OnIndexEntryCreated(name, reduceKey, luceneDoc));
log.DebugFormat("Reduce key {0} result in index {1} gave document: {2}", reduceKey, name, luceneDoc);
indexWriter.AddDocument(luceneDoc);
actions.IncrementSuccessIndexing();
}
return true;
});
log.DebugFormat("Reduce resulted in {0} entries for {1} for reduce key {2}", count, name, reduceKey);
}
