Пример #1
0
BSONObj KVCatalog::_findEntry(OperationContext* opCtx, StringData ns, RecordId* out) const {
    std::unique_ptr<Lock::ResourceLock> rLk;
    if (!_isRsThreadSafe && opCtx->lockState()) {
        rLk.reset(new Lock::ResourceLock(opCtx->lockState(), resourceIdCatalogMetadata, MODE_S));
    }

    RecordId dl;
    {
        stdx::lock_guard<stdx::mutex> lk(_identsLock);
        NSToIdentMap::const_iterator it = _idents.find(ns.toString());
        invariant(it != _idents.end());
        dl = it->second.storedLoc;
    }

    LOG(1) << "looking up metadata for: " << ns << " @ " << dl;
    RecordData data;
    if (!_rs->findRecord(opCtx, dl, &data)) {
        // since the in memory meta data isn't managed with mvcc
        // its possible for different transactions to see slightly
        // different things, which is ok via the locking above.
        return BSONObj();
    }

    if (out)
        *out = dl;

    return data.releaseToBson().getOwned();
}
Пример #2
0
 bool Collection::findDoc(OperationContext* txn, const RecordId& loc, BSONObj* out) const {
     RecordData rd;
     if ( !_recordStore->findRecord( txn, loc, &rd ) )
         return false;
     *out = rd.releaseToBson();
     return true;
 }
Пример #3
0
Status Collection::aboutToDeleteCapped(OperationContext* txn,
                                       const RecordId& loc,
                                       RecordData data) {
    /* check if any cursors point to us.  if so, advance them. */
    _cursorManager.invalidateDocument(txn, loc, INVALIDATION_DELETION);

    BSONObj doc = data.releaseToBson();
    _indexCatalog.unindexRecord(txn, doc, loc, false);

    return Status::OK();
}
Пример #4
0
bool Collection::findDoc(OperationContext* txn,
                         const RecordId& loc,
                         Snapshotted<BSONObj>* out) const {
    dassert(txn->lockState()->isCollectionLockedForMode(ns().toString(), MODE_IS));

    RecordData rd;
    if (!_recordStore->findRecord(txn, loc, &rd))
        return false;
    *out = Snapshotted<BSONObj>(txn->recoveryUnit()->getSnapshotId(), rd.releaseToBson());
    return true;
}
CollectionOptions MMAPV1DatabaseCatalogEntry::getCollectionOptions(OperationContext* txn,
                                                                   RecordId rid) const {
    CollectionOptions options;

    if (rid.isNull()) {
        return options;
    }

    RecordStoreV1Base* rs = _getNamespaceRecordStore();
    invariant(rs);

    RecordData data;
    invariant(rs->findRecord(txn, rid, &data));

    if (data.releaseToBson()["options"].isABSONObj()) {
        Status status = options.parse(data.releaseToBson()["options"].Obj());
        fassert(18523, status);
    }
    return options;
}
BSONObj KVCatalog::_findEntry(OperationContext* opCtx, StringData ns, RecordId* out) const {
    RecordId dl;
    {
        stdx::lock_guard<stdx::mutex> lk(_identsLock);
        NSToIdentMap::const_iterator it = _idents.find(ns.toString());
        invariant(it != _idents.end(), str::stream() << "Did not find collection. Ns: " << ns);
        dl = it->second.storedLoc;
    }

    LOG(3) << "looking up metadata for: " << ns << " @ " << dl;
    RecordData data;
    if (!_rs->findRecord(opCtx, dl, &data)) {
        // since the in memory meta data isn't managed with mvcc
        // its possible for different transactions to see slightly
        // different things, which is ok via the locking above.
        return BSONObj();
    }

    if (out)
        *out = dl;

    return data.releaseToBson().getOwned();
}