//##############################################################################
//##############################################################################
ChangeList
BerkeleyDBCXXDb::read_changelist() const
{
RANGE_LOG_FUNCTION();
std::string buf = this->get_record(record_type::GRAPH_META, "changelist");
ChangeList changes;
if(!buf.empty()) {
changes.ParseFromString(buf);
if(!changes.IsInitialized()) {
THROW_STACK(DatabaseVersioningError("Changelist cannot be initialized"));
}
return changes;
}
changes.set_current_version(0);
changes.mutable_change();
changes.mutable_unknown_fields();
return changes;
//THROW_STACK(DatabaseVersioningError("Changelist cannot be read"));
}
//##############################################################################
//##############################################################################
void
BerkeleyDB::add_new_range_version()
{
RANGE_LOG_FUNCTION();
this->init_info();
auto lock = info_->write_lock(record_type::GRAPH_META, "graph_list");
std::string buf = info_->get_record(record_type::GRAPH_META,
"range_changelist");
ChangeList changes;
if(!buf.empty()) {
changes.ParseFromString(buf);
}
std::unordered_map<std::string, uint64_t> vermap;
for (auto &gname : listGraphInstances()) {
auto ginst = getGraphInstance(gname);
vermap[gname] = ginst->version();
}
ChangeList_Change *c = changes.add_change();
for(auto &verinfo : vermap) {
auto item = c->add_items();
item->set_key(verinfo.first);
item->set_version(verinfo.second);
}
struct timeval cur_time;
gettimeofday(&cur_time, NULL);
auto ts = c->mutable_timestamp();
ts->set_seconds(cur_time.tv_sec);
ts->set_msec(cur_time.tv_usec / 1000);
changes.set_current_version(changes.current_version() + 1);
info_->commit_record(std::make_tuple(record_type::GRAPH_META, "range_changelist", 0, changes.SerializeAsString()));
}