/// <summary>
/// Loads the settings file or create a new default one if it doesn't exist
/// </summary>
public IndexSettings LoadSettings(string indexName)
{
var indexSettings = new IndexSettings();
var settingsFilename = GetSettingsFileName(indexName);
if (_appDataFolder.FileExists(settingsFilename))
{
var content = _appDataFolder.ReadFile(settingsFilename);
indexSettings = IndexSettings.Parse(content);
}
return indexSettings;
}
/// <summary>
/// Indexes a batch of content items
/// </summary>
/// <returns>
/// <c>true</c> if there are more items to process; otherwise, <c>false</c>.
/// </returns>
private bool BatchIndex(string indexName, string settingsFilename, IndexSettings indexSettings) {
var addToIndex = new List<IDocumentIndex>();
var deleteFromIndex = new List<int>();
bool loop = false;
// Rebuilding the index ?
if (indexSettings.Mode == IndexingMode.Rebuild) {
Logger.Information("Rebuilding index");
_indexingStatus = IndexingStatus.Rebuilding;
do {
loop = true;
// load all content items
var contentItems = _contentRepository
.Table.Where(versionRecord => versionRecord.Latest && versionRecord.Id > indexSettings.LastContentId)
.OrderBy(versionRecord => versionRecord.Id)
.Take(ContentItemsPerLoop)
.ToList()
.Select(versionRecord => _contentManager.Get(versionRecord.ContentItemRecord.Id, VersionOptions.VersionRecord(versionRecord.Id)))
.Distinct()
.ToList();
// if no more elements to index, switch to update mode
if (contentItems.Count == 0) {
indexSettings.Mode = IndexingMode.Update;
}
foreach (var item in contentItems) {
try {
var settings = GetTypeIndexingSettings(item);
// skip items from types which are not indexed
if (settings.List.Contains(indexName)) {
if (item.HasPublished()) {
var published = _contentManager.Get(item.Id, VersionOptions.Published);
IDocumentIndex documentIndex = ExtractDocumentIndex(published);
if (documentIndex != null && documentIndex.IsDirty) {
addToIndex.Add(documentIndex);
}
}
}
else if (settings.List.Contains(indexName + ":latest")) {
IDocumentIndex documentIndex = ExtractDocumentIndex(item);
if (documentIndex != null && documentIndex.IsDirty) {
addToIndex.Add(documentIndex);
}
}
indexSettings.LastContentId = item.VersionRecord.Id;
}
catch (Exception ex) {
Logger.Warning(ex, "Unable to index content item #{0} during rebuild", item.Id);
}
}
if (contentItems.Count < ContentItemsPerLoop) {
loop = false;
}
else {
_transactionManager.RequireNew();
}
} while (loop);
}
if (indexSettings.Mode == IndexingMode.Update) {
Logger.Information("Updating index");
_indexingStatus = IndexingStatus.Updating;
do {
var indexingTasks = _taskRepository
.Table.Where(x => x.Id > indexSettings.LastIndexedId)
.OrderBy(x => x.Id)
.Take(ContentItemsPerLoop)
.ToList()
.GroupBy(x => x.ContentItemRecord.Id)
.Select(group => new { TaskId = group.Max(task => task.Id), Delete = group.Last().Action == IndexingTaskRecord.Delete, Id = group.Key, ContentItem = _contentManager.Get(group.Key, VersionOptions.Latest) })
.OrderBy(x => x.TaskId)
.ToArray();
foreach (var item in indexingTasks) {
try {
IDocumentIndex documentIndex = null;
// item.ContentItem can be null if the content item has been deleted
if (item.ContentItem != null) {
// skip items from types which are not indexed
var settings = GetTypeIndexingSettings(item.ContentItem);
if (settings.List.Contains(indexName)) {
documentIndex = ExtractDocumentIndex(item.ContentItem);
}
else if (settings.List.Contains(indexName + ":latest")) {
var latest = _contentManager.Get(item.Id, VersionOptions.Latest);
documentIndex = ExtractDocumentIndex(latest);
}
}
if (documentIndex == null || item.Delete) {
deleteFromIndex.Add(item.Id);
}
else if (documentIndex.IsDirty) {
addToIndex.Add(documentIndex);
}
indexSettings.LastIndexedId = item.TaskId;
}
catch (Exception ex) {
Logger.Warning(ex, "Unable to index content item #{0} during update", item.Id);
}
}
if (indexingTasks.Length < ContentItemsPerLoop) {
loop = false;
}
else {
_transactionManager.RequireNew();
}
}
while (loop);
}
// save current state of the index
indexSettings.LastIndexedUtc = _clock.UtcNow;
_appDataFolder.CreateFile(settingsFilename, indexSettings.ToXml());
if (deleteFromIndex.Count == 0 && addToIndex.Count == 0) {
// nothing more to do
_indexingStatus = IndexingStatus.Idle;
return false;
}
// save new and updated documents to the index
try {
if (addToIndex.Count > 0) {
_indexProvider.Store(indexName, addToIndex);
Logger.Information("Added content items to index: {0}", addToIndex.Count);
}
}
catch (Exception ex) {
Logger.Warning(ex, "An error occured while adding a document to the index");
}
// removing documents from the index
try {
if (deleteFromIndex.Count > 0) {
_indexProvider.Delete(indexName, deleteFromIndex);
Logger.Information("Added content items to index: {0}", addToIndex.Count);
}
}
catch (Exception ex) {
Logger.Warning(ex, "An error occured while removing a document from the index");
}
return true;
}
