private unsafe void LoadExistingDatabase()
{
var header = stackalloc TransactionHeader[1];
bool hadIntegrityIssues = _journal.RecoverDatabase(header);
if (hadIntegrityIssues)
{
var message = _journal.Files.Count == 0 ? "Unrecoverable database" : "Database recovered partially. Some data was lost.";
_options.InvokeRecoveryError(this, message, null);
}
var entry = _headerAccessor.CopyHeader();
var nextPageNumber = (header->TransactionId == 0 ? entry.LastPageNumber : header->LastPageNumber) + 1;
State = new StorageEnvironmentState(null, null, nextPageNumber)
{
NextPageNumber = nextPageNumber
};
_transactionsCounter = (header->TransactionId == 0 ? entry.TransactionId : header->TransactionId);
using (var tx = NewTransaction(TransactionFlags.ReadWrite))
{
var root = Tree.Open(tx, _sliceComparer, header->TransactionId == 0 ? &entry.Root : &header->Root);
var freeSpace = Tree.Open(tx, _sliceComparer, header->TransactionId == 0 ? &entry.FreeSpace : &header->FreeSpace);
tx.UpdateRootsIfNeeded(root, freeSpace);
tx.Commit();
}
}
private unsafe void LoadExistingDatabase()
{
var header = stackalloc TransactionHeader[1];
bool hadIntegrityIssues = _journal.RecoverDatabase(header);
if (hadIntegrityIssues)
{
var message = _journal.Files.Count == 0 ? "Unrecoverable database" : "Database recovered partially. Some data was lost.";
_options.InvokeRecoveryError(this, message, null);
}
var entry = _headerAccessor.CopyHeader();
var nextPageNumber = (header->TransactionId == 0 ? entry.LastPageNumber : header->LastPageNumber) + 1;
State = new StorageEnvironmentState(null, nextPageNumber)
{
NextPageNumber = nextPageNumber,
Options = Options
};
_transactionsCounter = (header->TransactionId == 0 ? entry.TransactionId : header->TransactionId);
var transactionPersistentContext = new TransactionPersistentContext(true);
using (var tx = NewLowLevelTransaction(transactionPersistentContext, TransactionFlags.ReadWrite))
{
using (var root = Tree.Open(tx, null, Constants.RootTreeNameSlice, header->TransactionId == 0 ? &entry.Root : &header->Root))
{
tx.UpdateRootsIfNeeded(root);
using (var treesTx = new Transaction(tx))
{
var metadataTree = treesTx.ReadTree(Constants.MetadataTreeNameSlice);
if (metadataTree == null)
{
VoronUnrecoverableErrorException.Raise(this,
"Could not find metadata tree in database, possible mismatch / corruption?");
}
var dbId = metadataTree.Read("db-id");
if (dbId == null)
{
VoronUnrecoverableErrorException.Raise(this,
"Could not find db id in metadata tree, possible mismatch / corruption?");
}
var buffer = new byte[16];
var dbIdBytes = dbId.Reader.Read(buffer, 0, 16);
if (dbIdBytes != 16)
{
VoronUnrecoverableErrorException.Raise(this,
"The db id value in metadata tree wasn't 16 bytes in size, possible mismatch / corruption?");
}
var databseGuidId = _options.GenerateNewDatabaseId == false ? new Guid(buffer) : Guid.NewGuid();
DbId = databseGuidId;
FillBase64Id(databseGuidId);
if (_options.GenerateNewDatabaseId)
{
// save the new database id
metadataTree.Add("db-id", DbId.ToByteArray());
}
var schemaVersion = metadataTree.Read("schema-version");
if (schemaVersion == null)
{
VoronUnrecoverableErrorException.Raise(this,
"Could not find schema version in metadata tree, possible mismatch / corruption?");
}
var schemaVersionVal = schemaVersion.Reader.ReadLittleEndianInt32();
if (Options.SchemaVersion != 0 &&
schemaVersionVal != Options.SchemaVersion)
{
VoronUnrecoverableErrorException.Raise(this,
"The schema version of this database is expected to be " +
Options.SchemaVersion + " but is actually " + schemaVersionVal +
". You need to upgrade the schema.");
}
tx.Commit();
}
}
}
}