MojErr MojDb::del(const MojObject* idsBegin, const MojObject* idsEnd, MojUInt32& countOut, MojObject& arrOut, MojUInt32 flags, MojDbReqRef req)
{
MojAssert(idsBegin || idsBegin == idsEnd);
MojAssert(idsEnd >= idsBegin);
MojLogTrace(s_log);
countOut = 0;
MojErr err = beginReq(req);
MojErrCheck(err);
// do the dels
MojUInt32 count= 0;
for (const MojObject* i = idsBegin; i != idsEnd; ++i) {
MojObject foundObj;
bool found = false;
err = delImpl(*i, found, foundObj, req, flags);
MojErrCheck(err);
if (found) {
count++;
err = arrOut.push(foundObj);
MojErrCheck(err);
}
}
// commit txn
err = req->end();
MojErrCheck(err);
countOut = count;
return MojErrNone;
}
MojErr MojDb::del(const MojDbQuery& query, MojUInt32& countOut, MojUInt32 flags, MojDbReqRef req)
{
MojLogTrace(s_log);
countOut = 0;
MojErr err = beginReq(req);
MojErrCheck(err);
err = delImpl(query, countOut, req, flags);
MojErrCheck(err);
err = req->end();
MojErrCheck(err);
return MojErrNone;
}
MojErr MojDb::delKind(const MojObject& id, bool& foundOut, MojUInt32 flags, MojDbReqRef req)
{
MojLogTrace(s_log);
foundOut = false;
MojErr err = beginReq(req, true);
MojErrCheck(err);
// del kind obj
MojString idStr;
err = id.stringValue(idStr);
MojErrCheck(err);
MojDbKind *pk = NULL;
// If Kinds has sub-kinds, we give an error
err = m_kindEngine.getKind(idStr.data(), pk);
MojErrCheck(err);
if (pk->nsubkinds() > 0) {
MojLogWarning(s_log, _T("delKind_error: %s has %d subkinds \n"), idStr.data(), pk->nsubkinds());
MojErrThrow(MojErrDbKindHasSubKinds);
}
//MojLogInfo(s_log, _T("delKind: %s \n"), idStr.data());
MojLogWarning(s_log, _T("delKind: %s \n"), idStr.data());
err = m_kindEngine.checkOwnerPermission(idStr, req);
MojErrCheck(err);
MojString dbId;
err = formatKindId(idStr, dbId);
MojErrCheck(err);
MojObject deleted;
bool found = false;
MojDbAdminGuard adminGuard(req);
err = delImpl(dbId, found, deleted, req, flags);
MojErrCheck(err);
if (found) {
// del objects
MojDbQuery query;
err = query.from(idStr);
MojErrCheck(err);
err = query.includeDeleted(true);
MojErrCheck(err);
MojUInt32 count;
req->fixmode(true);
err = delImpl(query, count, req, flags | FlagPurge);
MojErrCheck(err);
// del associated permissions
query.clear();
err = query.from(MojDbKindEngine::PermissionId);
MojErrCheck(err);
err = query.where(MojDbServiceDefs::ObjectKey, MojDbQuery::OpEq, idStr);
MojErrCheck(err);
req->fixmode(true);
err = delImpl(query, count, req, flags);
MojErrCheck(err);
// del kind
MojErr errAcc = m_kindEngine.delKind(idStr, req);
MojErrAccumulate(err, errAcc);
}
err = commitKind(idStr, req, err);
MojErrCheck(err);
foundOut = found;
return MojErrNone;
}
MojErr MojDb::purgeImpl(MojObject& obj, MojUInt32& countOut, MojDbReq& req)
{
MojLogTrace(s_log);
MojObject val;
MojErr err = obj.getRequired(RevNumKey, val);
MojErrCheck(err);
MojObject timestamp;
err = obj.getRequired(TimestampKey, timestamp);
MojErrCheck(err);
// purge all objects that were deleted on or prior to this rev num
// query for objects in two passes - once where backup is true and once where backup is false
MojDbQuery objQuery;
err = objQuery.from(MojDbKindEngine::RootKindId);
MojErrCheck(err);
err = objQuery.where(DelKey, MojDbQuery::OpEq, true);
MojErrCheck(err);
err = objQuery.where(SyncKey, MojDbQuery::OpEq, true);
MojErrCheck(err);
err = objQuery.where(RevKey, MojDbQuery::OpLessThanEq, val);
MojErrCheck(err);
MojUInt32 backupCount = 0;
req.autobatch(true);
req.fixmode(true);
objQuery.limit(AutoBatchSize);
err = delImpl(objQuery, backupCount, req, FlagPurge);
MojErrCheck(err);
MojDbQuery objQuery2;
err = objQuery2.from(MojDbKindEngine::RootKindId);
MojErrCheck(err);
err = objQuery2.where(DelKey, MojDbQuery::OpEq, true);
MojErrCheck(err);
err = objQuery2.where(SyncKey, MojDbQuery::OpEq, false);
MojErrCheck(err);
err = objQuery2.where(RevKey, MojDbQuery::OpLessThanEq, val);
MojErrCheck(err);
MojUInt32 count = 0;
MojUInt32 batchRemain = 0;
if (backupCount <= AutoBatchSize)
batchRemain = AutoBatchSize - backupCount;
req.autobatch(true); // enable auto batch
req.fixmode(true); // force deletion of bad entries
if (batchRemain > 0) {
objQuery2.limit(batchRemain);
err = delImpl(objQuery2, count, req, FlagPurge);
MojErrCheck(err);
}
countOut = count + backupCount;
req.autobatch(false);
// if we actually deleted objects, store this rev num as the last purge rev
if (countOut > 0) {
err = updateState(LastPurgedRevKey, val, req);
MojErrCheck(err);
}
// delete all the RevTimestamp entries prior to this one
MojDbQuery revTimestampQuery;
err = revTimestampQuery.from(MojDbKindEngine::RevTimestampId);
MojErrCheck(err);
err = revTimestampQuery.where(TimestampKey, MojDbQuery::OpLessThanEq, timestamp);
MojErrCheck(err);
count = 0;
err = delImpl(revTimestampQuery, count, req, FlagPurge);
MojErrCheck(err);
return MojErrNone;
}
