internal LiteFileInfo(DbEngine engine, BsonDocument doc)
{
_engine = engine;
this.Id = doc["_id"].AsString;
this.Filename = doc["filename"].AsString;
this.MimeType = doc["mimeType"].AsString;
this.Length = doc["length"].AsInt64;
this.Chunks = doc["chunks"].AsInt32;
this.UploadDate = doc["uploadDate"].AsDateTime;
this.Metadata = doc["metadata"].AsDocument;
}
internal LiteFileStream(DbEngine engine, LiteFileInfo file)
{
_engine = engine;
_file = file;
if (file.Length == 0)
{
throw LiteException.FileCorrupted(file);
}
_positionInChunk = 0;
_currentChunkIndex = 0;
_currentChunkData = this.GetChunkData(_currentChunkIndex);
}
/// <summary>
/// Loop in all registered versions and apply all that needs. Update dbversion
/// </summary>
internal void Apply(LiteDatabase db, DbEngine engine, Logger log)
{
if (_versions.Count == 0) return;
var dbparams = engine.GetDbParam();
var updated = false;
// apply all action version updates
foreach(var version in _versions.Where(x => x.Key > dbparams.DbVersion))
{
log.Write(Logger.COMMAND, "update database version to {0}", version.Key);
version.Value(db);
dbparams.DbVersion = version.Key;
updated = true;
}
if(updated)
{
engine.SetParam(dbparams);
}
}
internal LiteFileStorage(DbEngine engine)
{
_engine = engine;
}
internal LiteFileStorage(DbEngine engine)
{
_engine = engine;
}
/// <summary>
/// Copy database do another disk
/// </summary>
public long Shrink()
{
// begin a write exclusive access
using (var trans = _transaction.Begin(false))
{
try
{
// create a temporary disk
var tempDisk = _disk.GetTempDisk();
// get initial disk size
var header = _pager.GetPage <HeaderPage>(0);
var diff = 0L;
// create temp engine instance to copy all documents
using (var tempEngine = new DbEngine(tempDisk, new Logger()))
{
tempDisk.Open(false);
// read all collections
foreach (var col in _collections.GetAll())
{
// first copy all indexes
foreach (var index in col.GetIndexes(false))
{
tempEngine.EnsureIndex(col.CollectionName, index.Field, index.Options);
}
// then, read all documents and copy to new engine
var nodes = _indexer.FindAll(col.PK, Query.Ascending);
tempEngine.Insert(col.CollectionName,
nodes.Select(node => BsonSerializer.Deserialize(_data.Read(node.DataBlock))));
// then re-open the disk service as the previous Insert's auto-transaction just closed it.
tempDisk.Open(false);
}
// get final header from temp engine
var tempHeader = tempEngine._pager.GetPage <HeaderPage>(0, true);
// copy info from initial header to final header
tempHeader.ChangeID = header.ChangeID;
// lets create journal file before re-write
for (uint pageID = 0; pageID <= header.LastPageID; pageID++)
{
_disk.WriteJournal(pageID, _disk.ReadPage(pageID));
}
// commit journal + shrink data file
_disk.SetLength(BasePage.GetSizeOfPages(tempHeader.LastPageID + 1));
// lets re-write all pages copying from new database
for (uint pageID = 0; pageID <= tempHeader.LastPageID; pageID++)
{
_disk.WritePage(pageID, tempDisk.ReadPage(pageID));
}
// now delete journal
_disk.DeleteJournal();
// get diff from initial and final last pageID
diff = BasePage.GetSizeOfPages(header.LastPageID - tempHeader.LastPageID);
tempDisk.Close();
}
// unlock disk and clear cache to continue
trans.Commit();
// delete temporary disk
_disk.DeleteTempDisk();
return(diff);
}
catch (Exception ex)
{
_log.Write(Logger.ERROR, ex.Message);
trans.Rollback();
throw;
}
}
}
/// <summary>
/// Copy database do another disk
/// </summary>
public int Shrink()
{
lock (_locker)
{
// lock and clear cache - no changes during shrink
_disk.Lock();
_cache.Clear();
// create a temporary disk
var tempDisk = _disk.GetTempDisk();
// get initial disk size
var header = _pager.GetPage<HeaderPage>(0);
var diff = 0;
// create temp engine instance to copy all documents
using (var tempEngine = new DbEngine(tempDisk, new Logger()))
{
// read all collections
foreach (var col in _collections.GetAll())
{
// first copy all indexes
foreach (var index in col.GetIndexes(false))
{
tempEngine.EnsureIndex(col.CollectionName, index.Field, index.Options);
}
// then, read all documents and copy to new engine
var nodes = _indexer.FindAll(col.PK, Query.Ascending);
tempEngine.Insert(col.CollectionName,
nodes.Select(node => BsonSerializer.Deserialize(_data.Read(node.DataBlock, true).Buffer)));
}
// get final header from temp engine
var tempHeader = tempEngine._pager.GetPage<HeaderPage>(0, true);
// copy info from initial header to final header
tempHeader.ChangeID = header.ChangeID;
// lets create journal file before re-write
for (uint pageID = 0; pageID <= header.LastPageID; pageID++)
{
_disk.WriteJournal(pageID, _disk.ReadPage(pageID));
}
// commit journal + shrink data file
_disk.SetLength((tempHeader.LastPageID + 1) * BasePage.PAGE_SIZE);
// lets re-write all pages copying from new database
for (uint pageID = 0; pageID <= tempHeader.LastPageID; pageID++)
{
_disk.WritePage(pageID, tempDisk.ReadPage(pageID));
}
// now delete journal
_disk.DeleteJournal();
// get diff from initial and final last pageID
diff = (int)((header.LastPageID - tempHeader.LastPageID) * BasePage.PAGE_SIZE);
}
// unlock disk and ckar cache to continue
_disk.Unlock();
_cache.Clear();
// delete temporary disk
_disk.DeleteTempDisk();
return diff;
}
}
/// <summary>
/// Copy database do another disk
/// </summary>
public long Shrink()
{
lock (_locker)
{
// lock and clear cache - no changes during shrink
_disk.Lock();
_cache.Clear();
// create a temporary disk
var tempDisk = _disk.GetTempDisk();
// get initial disk size
var header = _pager.GetPage <HeaderPage>(0);
var diff = 0L;
// create temp engine instance to copy all documents
using (var tempEngine = new DbEngine(tempDisk, new Logger()))
{
// read all collections
foreach (var col in _collections.GetAll())
{
// first copy all indexes
foreach (var index in col.GetIndexes(false))
{
tempEngine.EnsureIndex(col.CollectionName, index.Field, index.Options);
}
// then, read all documents and copy to new engine
var nodes = _indexer.FindAll(col.PK, Query.Ascending);
tempEngine.Insert(col.CollectionName,
nodes.Select(node => BsonSerializer.Deserialize(_data.Read(node.DataBlock))));
}
// get final header from temp engine
var tempHeader = tempEngine._pager.GetPage <HeaderPage>(0, true);
// copy info from initial header to final header
tempHeader.ChangeID = header.ChangeID;
// lets create journal file before re-write
for (uint pageID = 0; pageID <= header.LastPageID; pageID++)
{
_disk.WriteJournal(pageID, _disk.ReadPage(pageID));
}
// commit journal + shrink data file
_disk.SetLength(BasePage.GetSizeOfPages(tempHeader.LastPageID + 1));
// lets re-write all pages copying from new database
for (uint pageID = 0; pageID <= tempHeader.LastPageID; pageID++)
{
_disk.WritePage(pageID, tempDisk.ReadPage(pageID));
}
// now delete journal
_disk.DeleteJournal();
// get diff from initial and final last pageID
diff = BasePage.GetSizeOfPages(header.LastPageID - tempHeader.LastPageID);
}
// unlock disk and ckar cache to continue
_disk.Unlock();
_cache.Clear();
// delete temporary disk
_disk.DeleteTempDisk();
return(diff);
}
}
public LiteFileStorage(DbEngine engine)
{
_engine = engine;
}