コード例 #1
0
    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();
    }
コード例 #2
0
ファイル: database.cpp プロジェクト: nathanielc/mongo
    Status Database::_renameSingleNamespace( const StringData& fromNS, const StringData& toNS,
                                             bool stayTemp ) {

        // TODO: make it so we dont't need to do this
        string fromNSString = fromNS.toString();
        string toNSString = toNS.toString();

        // 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" );

        // remove anything cached
        {
            scoped_lock lk( _collectionLock );
            _collections.erase( fromNSString );
            _collections.erase( toNSString );
        }

        ClientCursor::invalidate( fromNSString.c_str() );
        ClientCursor::invalidate( toNSString.c_str() );
        NamespaceDetailsTransient::eraseCollection( fromNSString ); // XXX
        NamespaceDetailsTransient::eraseCollection( toNSString ); // XXX

        // 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( toNS, fromDetails );
        NamespaceDetails* toDetails = _namespaceIndex.details( toNS );

        try {
            toDetails->copyingFrom(toNSString.c_str(), 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(toNSString.c_str());
            throw;
        }

        // at this point, code .ns stuff moved

        _namespaceIndex.kill_ns( fromNSString.c_str() );
        fromDetails = NULL;

        // fix system.namespaces
        BSONObj newSpec;
        {

            BSONObj oldSpec;
            if ( !Helpers::findOne( _namespacesName, BSON( "name" << fromNS ), oldSpec ) )
                return Status( ErrorCodes::InternalError, "can't find system.namespaces entry" );

            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();
        }
        addNewNamespaceToCatalog( toNSString.c_str(), newSpec.isEmpty() ? 0 : &newSpec );

        deleteObjects( _namespacesName.c_str(), BSON( "name" << fromNS ), false, false, true );

        return Status::OK();
    }
コード例 #3
0
Status MMAPV1DatabaseCatalogEntry::_renameSingleNamespace(OperationContext* txn,
                                                          StringData fromNS,
                                                          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;
    RecordId oldSpecLocation = getCollectionCatalogEntry(fromNS)->getNamespacesRecordId();
    invariant(!oldSpecLocation.isNull());
    {
        BSONObj oldSpec = _getNamespaceRecordStore()->dataFor(txn, oldSpecLocation).releaseToBson();
        invariant(!oldSpec.isEmpty());

        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();
    }

    RecordId rid = _addNamespaceToNamespaceCollection(txn, toNS, newSpec.isEmpty() ? 0 : &newSpec);

    _getNamespaceRecordStore()->deleteRecord(txn, oldSpecLocation);

    Entry*& entry = _collections[toNS.toString()];
    invariant(entry == NULL);
    txn->recoveryUnit()->registerChange(new EntryInsertion(toNS, this));
    entry = new Entry();
    _removeFromCache(txn->recoveryUnit(), fromNS);
    _insertInCache(txn, toNS, rid, entry);

    return Status::OK();
}