CollectionOptions MMAPV1DatabaseCatalogEntry::getCollectionOptions( OperationContext* txn,
const StringData& ns ) const {
if ( nsToCollectionSubstring( ns ) == "system.namespaces" ) {
return CollectionOptions();
}
RecordStoreV1Base* rs = _getNamespaceRecordStore();
invariant( rs );
scoped_ptr<RecordIterator> it( rs->getIterator(txn) );
while ( !it->isEOF() ) {
DiskLoc loc = it->getNext();
BSONObj entry = it->dataFor( loc ).toBson();
BSONElement name = entry["name"];
if ( name.type() == String && name.String() == ns ) {
CollectionOptions options;
if ( entry["options"].isABSONObj() ) {
Status status = options.parse( entry["options"].Obj() );
fassert( 18523, status );
}
return options;
}
}
return CollectionOptions();
}
void MMAPV1DatabaseCatalogEntry::_removeNamespaceFromNamespaceCollection( OperationContext* txn,
const StringData& ns ) {
if ( nsToCollectionSubstring( ns ) == "system.namespaces" ) {
// system.namespaces holds all the others, so it is not explicitly listed in the catalog.
return;
}
RecordStoreV1Base* rs = _getNamespaceRecordStore();
invariant( rs );
scoped_ptr<RecordIterator> it( rs->getIterator(txn) );
while ( !it->isEOF() ) {
DiskLoc loc = it->getNext();
BSONObj entry = it->dataFor( loc ).toBson();
BSONElement name = entry["name"];
if ( name.type() == String && name.String() == ns ) {
rs->deleteRecord( txn, loc );
break;
}
}
}
Status MMAPV1DatabaseCatalogEntry::_renameSingleNamespace( OperationContext* txn,
const StringData& fromNS,
const StringData& toNS,
bool stayTemp ) {
// some sanity checking
NamespaceDetails* fromDetails = _namespaceIndex.details( fromNS );
if ( !fromDetails )
return Status( ErrorCodes::BadValue, "from namespace doesn't exist" );
if ( _namespaceIndex.details( toNS ) )
return Status( ErrorCodes::BadValue, "to namespace already exists" );
// at this point, we haven't done anything destructive yet
// ----
// actually start moving
// ----
// this could throw, but if it does we're ok
_namespaceIndex.add_ns( txn, toNS, fromDetails );
NamespaceDetails* toDetails = _namespaceIndex.details( toNS );
try {
toDetails->copyingFrom(txn,
toNS,
_namespaceIndex,
fromDetails); // fixes extraOffset
}
catch( DBException& ) {
// could end up here if .ns is full - if so try to clean up / roll back a little
_namespaceIndex.kill_ns( txn, toNS );
throw;
}
// at this point, code .ns stuff moved
_namespaceIndex.kill_ns( txn, fromNS );
fromDetails = NULL;
// fix system.namespaces
BSONObj newSpec;
DiskLoc oldSpecLocation;
{
BSONObj oldSpec;
{
RecordStoreV1Base* rs = _getNamespaceRecordStore( txn, fromNS );
scoped_ptr<RecordIterator> it( rs->getIterator() );
while ( !it->isEOF() ) {
DiskLoc loc = it->getNext();
const Record* rec = it->recordFor( loc );
BSONObj entry( rec->data() );
if ( fromNS == entry["name"].String() ) {
oldSpecLocation = loc;
oldSpec = entry.getOwned();
break;
}
}
}
invariant( !oldSpec.isEmpty() );
invariant( !oldSpecLocation.isNull() );
BSONObjBuilder b;
BSONObjIterator i( oldSpec.getObjectField( "options" ) );
while( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName(), "create" ) != 0 ) {
if (stayTemp || (strcmp(e.fieldName(), "temp") != 0))
b.append( e );
}
else {
b << "create" << toNS;
}
}
newSpec = b.obj();
}
_addNamespaceToNamespaceCollection( txn, toNS, newSpec.isEmpty() ? 0 : &newSpec );
_getNamespaceRecordStore( txn, fromNS )->deleteRecord( txn, oldSpecLocation );
return Status::OK();
}
Status MMAPV1DatabaseCatalogEntry::renameCollection( OperationContext* txn,
const StringData& fromNS,
const StringData& toNS,
bool stayTemp ) {
Status s = _renameSingleNamespace( txn, fromNS, toNS, stayTemp );
if ( !s.isOK() )
return s;
NamespaceDetails* details = _namespaceIndex.details( toNS );
invariant( details );
RecordStoreV1Base* systemIndexRecordStore = _getIndexRecordStore( txn );
scoped_ptr<RecordIterator> it( systemIndexRecordStore->getIterator() );
while ( !it->isEOF() ) {
DiskLoc loc = it->getNext();
const Record* rec = it->recordFor( loc );
BSONObj oldIndexSpec( rec->data() );
if ( fromNS != oldIndexSpec["ns"].valuestrsafe() )
continue;
BSONObj newIndexSpec;
{
BSONObjBuilder b;
BSONObjIterator i( oldIndexSpec );
while( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName(), "ns" ) != 0 )
b.append( e );
else
b << "ns" << toNS;
}
newIndexSpec = b.obj();
}
StatusWith<DiskLoc> newIndexSpecLoc =
systemIndexRecordStore->insertRecord( txn,
newIndexSpec.objdata(),
newIndexSpec.objsize(),
-1 );
if ( !newIndexSpecLoc.isOK() )
return newIndexSpecLoc.getStatus();
const string& indexName = oldIndexSpec.getStringField( "name" );
{
// fix IndexDetails pointer
NamespaceDetailsCollectionCatalogEntry ce( toNS, details,
_getIndexRecordStore( txn ), this );
int indexI = ce._findIndexNumber( indexName );
IndexDetails& indexDetails = details->idx(indexI);
*txn->recoveryUnit()->writing(&indexDetails.info) = newIndexSpecLoc.getValue(); // XXX: dur
}
{
// move underlying namespac
string oldIndexNs = IndexDescriptor::makeIndexNamespace( fromNS, indexName );
string newIndexNs = IndexDescriptor::makeIndexNamespace( toNS, indexName );
Status s = _renameSingleNamespace( txn, oldIndexNs, newIndexNs, false );
if ( !s.isOK() )
return s;
}
systemIndexRecordStore->deleteRecord( txn, loc );
}
return Status::OK();
}