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#include <cerrno>
#include <cstring>
#include <ctime>
#include "test_helpers.hxx"
using namespace PGSTD;
using namespace pqxx;
// Example program for libpqxx. Send notification to self.
namespace
{
int Backend_PID = 0;
// Sample implementation of notification receiver.
class TestListener : public notification_receiver
{
bool m_done;
public:
explicit TestListener(connection_base &C) :
notification_receiver(C, "listen"), m_done(false) {}
virtual void operator()(const string &, int be_pid)
{
m_done = true;
PQXX_CHECK_EQUAL(
be_pid,
Backend_PID,
"Notification came from wrong backend process.");
}
bool done() const { return m_done; }
};
// A transactor to trigger our notification receiver.
class Notify : public transactor<>
{
string m_channel;
public:
explicit Notify(string channel) :
transactor<>("Notifier"), m_channel(channel) { }
void operator()(argument_type &T)
{
T.exec("NOTIFY \"" + m_channel + "\"");
Backend_PID = T.conn().backendpid();
}
};
void test_004(transaction_base &T)
{
T.abort();
TestListener L(T.conn());
T.conn().perform(Notify(L.channel()));
int notifs = 0;
for (int i=0; (i < 20) && !L.done(); ++i)
{
PQXX_CHECK_EQUAL(notifs, 0, "Got unexpected notifications.");
// Sleep one second using a libpqxx-internal function. Kids, don't try
// this at home! The pqxx::internal namespace is not for third-party use
// and may change radically at any time.
pqxx::internal::sleep_seconds(1);
notifs = T.conn().get_notifs();
}
PQXX_CHECK_NOT_EQUAL(L.done(), false, "No notification received.");
PQXX_CHECK_EQUAL(notifs, 1, "Got too many notifications.");
}
} // namespace
PQXX_REGISTER_TEST_T(test_004, nontransaction)
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