MojErr MojDb::loadImpl(MojObject& obj, MojUInt32 flags, MojDbReq& req)
{
bool found = false;
MojString kindName;
MojErr err = obj.get(MojDb::KindKey, kindName, found);
MojErrCheck(err);
if (!found)
MojErrThrow(MojErrDbKindNotSpecified);
bool deleted = false;
obj.get(MojDb::DelKey, deleted);
// when loading objects, if the object is deleted, call delKind/del
// otherwise, call putKind, putPermissions or put depending on the kind
if (deleted) {
MojObject id;
if (obj.get(MojDbServiceDefs::IdKey, id)) {
if (kindName.startsWith(MojDbKindEngine::KindKindIdPrefix)) {
err = delKind(id, found, flags, req);
MojErrCheck(err);
} else {
err = del(id, found, flags, req);
MojErrCheck(err);
}
}
} else {
if (kindName.startsWith(MojDbKindEngine::KindKindIdPrefix)) {
err = putKind(obj, flags, req);
MojErrCheck(err);
} else if (kindName.startsWith(MojDbKindEngine::PermissionIdPrefix)) {
err = putPermissions(&obj, &obj + 1, req);
MojErrCatch(err, MojErrDbKindNotRegistered); // kind may not have been backed up
MojErrCheck(err);
} else {
err = putImpl(obj, flags, req, false /*checkSchema*/);
MojErrCatch(err, MojErrDbKindNotRegistered); // kind may not have been backed up
MojErrCheck(err);
}
}
return MojErrNone;
}
MojErr MojDb::putObj(const MojObject& id, MojObject& obj, const MojObject* oldObj,
MojDbStorageItem* oldItem, MojDbReq& req, MojDbOp op, bool checkSchema)
{
MojLogTrace(s_log);
// if nothing changed, don't do the update
if (oldObj != NULL && obj == *oldObj)
return MojErrNone;
// update revision
MojInt64 rev;
MojErr err = nextId(rev);
MojErrCheck(err);
err = obj.put(RevKey, rev);
MojErrCheck(err);
// assign id
MojObject putId = id;
if (putId.undefined()) {
err = m_idGenerator.id(putId);
MojErrCheck(err);
err = obj.put(IdKey, putId);
MojErrCheck(err);
}
// assign ids to subobjects in arrays - only for regular objects
MojString kindName;
bool found = false;
err = obj.get(MojDb::KindKey, kindName, found);
MojErrCheck(err);
if (!found)
MojErrThrow(MojErrDbKindNotSpecified);
if (!kindName.startsWith(MojDbKindEngine::KindKindIdPrefix)) {
err = assignIds(obj);
MojErrCheck(err);
}
// validate, update indexes, etc.
MojTokenSet tokenSet;
err = m_kindEngine.update(&obj, oldObj, req, op, tokenSet, checkSchema);
MojErrCheck(err);
// serialize object
MojDbObjectHeader header(putId);
err = header.extractFrom(obj);
MojErrCheck(err);
MojBuffer buf;
err = header.write(buf, m_kindEngine);
MojErrCheck(err);
MojObjectWriter writer(buf, &tokenSet);
err = obj.visit(writer);
MojErrCheck(err);
// store it in the db
if (oldItem) {
err = m_objDb->update(putId, buf, oldItem, req.txn());
MojErrCheck(err);
} else {
err = m_objDb->insert(putId, buf, req.txn());
MojErrCheck(err);
}
// put header back in the object for response purposes
err = header.addTo(obj);
MojErrCheck(err);
return MojErrNone;
}