public void Start()
{
var indexDefinitions = Database.Indexes.Definitions;
var sideBySideIndexes = indexDefinitions.Where(x => x.Name.StartsWith(Constants.SideBySideIndexNamePrefix)).ToList();
foreach (var indexDefinition in sideBySideIndexes)
{
var indexName = indexDefinition.Name;
var instance = Database.IndexStorage.GetIndexInstance(indexName);
if (instance == null)
{
//probably deleted
continue;
}
var indexToAdd = new IndexToAdd
{
Name = indexDefinition.Name,
Definition = indexDefinition,
Priority = instance.Priority
};
SetIndexReplaceInfo(indexName, indexToAdd);
StartReplicatingSideBySideIndexAsync(indexToAdd);
}
Database.Notifications.OnIndexChange += OnIndexChange;
Database.Notifications.OnDocumentChange += OnDocumentChange;
indexReplicationTimer = Database.TimerManager.NewTimer(x => Execute(), TimeSpan.Zero, replicationFrequency);
lastQueriedTimer = Database.TimerManager.NewTimer(x => SendLastQueried(), TimeSpan.Zero, lastQueriedFrequency);
}
public void StartReplicatingSideBySideIndexAsync(IndexToAdd indexToAdd)
{
if (indexToAdd.Name.StartsWith(Constants.SideBySideIndexNamePrefix))
{
indexToAdd.Name = indexToAdd.Name.Substring(Constants.SideBySideIndexNamePrefix.Length);
}
sideBySideIndexesToReplicate.TryAdd(indexToAdd.Definition.IndexId, indexToAdd);
ReplicateSideBySideIndexes();
}
private void OnDocumentChange(DocumentDatabase db, DocumentChangeNotification notification, RavenJObject doc)
{
var docId = notification.Id;
if (docId == null)
{
return;
}
if (docId.StartsWith(Constants.IndexReplacePrefix, StringComparison.OrdinalIgnoreCase) == false)
{
return;
}
if (notification.Type != DocumentChangeTypes.Put)
{
return;
}
var replaceIndexName = docId.Substring(Constants.IndexReplacePrefix.Length);
var instance = Database.IndexStorage.GetIndexInstance(replaceIndexName);
if (instance == null)
{
return;
}
var indexDefinition = Database.Indexes.GetIndexDefinition(replaceIndexName);
if (indexDefinition == null)
{
return;
}
var indexToAdd = new IndexToAdd
{
Name = replaceIndexName,
Definition = indexDefinition,
Priority = instance.Priority,
};
SetIndexReplaceInfo(replaceIndexName, indexToAdd);
StartReplicatingSideBySideIndexAsync(indexToAdd);
}
private void SetIndexReplaceInfo(string indexName, IndexToAdd indexToAdd)
{
var key = Constants.IndexReplacePrefix + indexName;
var replaceDoc = Database.Documents.Get(key, null);
if (replaceDoc == null)
{
return;
}
try
{
var indexReplaceInformation = replaceDoc.DataAsJson.JsonDeserialization <IndexReplaceDocument>();
indexToAdd.MinimumEtagBeforeReplace = indexReplaceInformation.MinimumEtagBeforeReplace;
indexToAdd.ReplaceTimeUtc = indexReplaceInformation.ReplaceTimeUtc;
}
catch (Exception)
{
//the index was already replaced or the document was deleted
//anyway, we'll try to replicate this index with default settings
}
}
