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Send member/network change notifications via Postgres

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This commit is contained in:
Grant Limberg 2018-09-06 15:14:16 -07:00
parent de45bdb448
commit 0ec6215493
1 changed files with 46 additions and 0 deletions
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46
controller/PostgreSQL.cpp
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@ -44,6 +44,21 @@ static const char *_timestr()
return ts;
}
std::string join(const std::vector<std::string> &elements, const char * const separator)
{
switch(elements.size()) {
case 0:
return "";
case 1:
return elements[0];
default:
std::ostringstream os;
std::copy(elements.begin(), elements.end()-1, std::ostream_iterator<std::string>(os, separator));
os << *elements.rbegin();
return os.str();
}
}
}
using namespace ZeroTier;
@ -983,12 +998,16 @@ void PostgreSQL::onlineNotificationThread()
int64_t lastUpdatedNetworkStatus = 0;
std::unordered_map< std::pair<uint64_t,uint64_t>,int64_t,_PairHasher > lastOnlineCumulative;
while (_run == 1) {
if (PQstatus(conn) != CONNECTION_OK) {
fprintf(stderr, "ERROR: Online Notification thread lost connection to Postgres.");
exit(-1);
}
// map used to send notifications to front end
std::unordered_map<std::string, std::vector<std::string>> updateMap;
std::unordered_map< std::pair<uint64_t,uint64_t>,std::pair<int64_t,InetAddress>,_PairHasher > lastOnline;
{
std::lock_guard<std::mutex> l(_lastOnline_l);
@ -1024,6 +1043,10 @@ void PostgreSQL::onlineNotificationThread()
std::string networkId(nwidTmp);
std::string memberId(memTmp);
std::vector<std::string> &members = updateMap[networkId];
members.push_back(memberId);
int64_t ts = i->second.first;
std::string ipAddr = i->second.second.toIpString(ipTmp);
@ -1108,6 +1131,10 @@ void PostgreSQL::onlineNotificationThread()
Utils::hex(i->first, tmp);
std::string networkId(tmp);
std::vector<std::string> &_notUsed = updateMap[networkId];
(void)_notUsed;
uint64_t authMemberCount = 0;
uint64_t totalMemberCount = 0;
uint64_t onlineMemberCount = 0;
@ -1186,6 +1213,25 @@ void PostgreSQL::onlineNotificationThread()
}
}
for (auto it = updateMap.begin(); it != updateMap.end(); ++it) {
std::string networkId = it->first;
std::vector<std::string> members = it->second;
std::stringstream queryBuilder;
std::string membersStr = ::join(members, ",");
queryBuilder << "NOTIFY controller, '" << networkId << ":" << membersStr << "'";
std::string query = queryBuilder.str();
fprintf(stderr, "%s\n", query.c_str());
PGresult *res = PQexec(conn,query.c_str());
if (PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr, "ERROR: Error sending NOTIFY: %s\n", PQresultErrorMessage(res));
}
PQclear(res);
}
std::this_thread::sleep_for(std::chrono::milliseconds(250));
}
PQfinish(conn);