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hydra-queue-runner: Handle status queries on the main thread

Doing it on the queue monitor thread was problematic because
processing the queue can take a while.
This commit is contained in:
Eelco Dolstra 2015-06-18 01:57:01 +02:00
parent a40ca6b76e
commit 69be3cfe93

View file

@ -84,6 +84,23 @@ struct Connection : pqxx::connection
};
struct receiver : public pqxx::notification_receiver
{
bool status = false;
receiver(pqxx::connection_base & c, const std::string & channel)
: pqxx::notification_receiver(c, channel) { }
void operator() (const string & payload, int pid) override
{
status = true;
};
bool get() {
bool b = status;
status = false;
return b;
}
};
typedef unsigned int BuildID;
@ -435,26 +452,9 @@ void State::queueMonitorLoop()
{
auto conn(dbPool.get());
struct receiver : public pqxx::notification_receiver
{
bool status = false;
receiver(pqxx::connection_base & c, const std::string & channel)
: pqxx::notification_receiver(c, channel) { }
void operator() (const string & payload, int pid) override
{
status = true;
};
bool get() {
bool b = status;
status = false;
return b;
}
};
receiver buildsAdded(*conn, "builds_added");
receiver buildsRestarted(*conn, "builds_restarted");
receiver buildsCancelled(*conn, "builds_cancelled");
receiver dumpStatus(*conn, "dump_status");
auto store = openStore(); // FIXME: pool
@ -479,8 +479,6 @@ void State::queueMonitorLoop()
removeCancelledBuilds(*conn);
}
if (dumpStatus.get())
State::dumpStatus();
}
}
@ -1314,6 +1312,22 @@ void State::run()
std::thread(&State::dispatcher, this).detach();
while (true) {
try {
auto conn(dbPool.get());
receiver dumpStatus(*conn, "dump_status");
while (true) {
conn->await_notification();
if (dumpStatus.get())
State::dumpStatus();
}
} catch (std::exception & e) {
printMsg(lvlError, format("main thread: %1%") % e.what());
sleep(10); // probably a DB problem, so don't retry right away
}
}
// Never reached.
queueMonitorThread.join();
}