First Commit

ext/libpqxx-7.7.3/test/test78.cxx

@@ -0,0 +1,69 @@
+#include <cerrno>
+#include <cstring>
+#include <iostream>
+
+#include <pqxx/notification>
+#include <pqxx/transaction>
+#include <pqxx/transactor>
+
+#include "test_helpers.hxx"
+
+
+// Example program for libpqxx.  Send notification to self, using a
+// notification name with unusal characters, and without polling.
+namespace
+{
+// Sample implementation of notification receiver.
+class TestListener : public pqxx::notification_receiver
+{
+  bool m_done;
+
+public:
+  explicit TestListener(pqxx::connection &conn, std::string const &Name) :
+          pqxx::notification_receiver(conn, Name), m_done(false)
+  {}
+
+  void operator()(std::string const &, int be_pid) override
+  {
+    m_done = true;
+    PQXX_CHECK_EQUAL(
+      be_pid, conn().backendpid(),
+      "Got notification from wrong backend process.");
+
+    std::cout << "Received notification: " << channel() << " pid=" << be_pid
+              << std::endl;
+  }
+
+  bool done() const { return m_done; }
+};
+
+
+void test_078()
+{
+  pqxx::connection conn;
+
+  std::string const NotifName{"my listener"};
+  TestListener L{conn, NotifName};
+
+  pqxx::perform([&conn, &L] {
+    pqxx::work tx{conn};
+    tx.exec0("NOTIFY " + tx.quote_name(L.channel()));
+    tx.commit();
+  });
+
+  int notifs{0};
+  for (int i{0}; (i < 20) and not L.done(); ++i)
+  {
+    PQXX_CHECK_EQUAL(notifs, 0, "Got unexpected notifications.");
+    std::cout << ".";
+    notifs = conn.await_notification();
+  }
+  std::cout << std::endl;
+
+  PQXX_CHECK(L.done(), "No notification received.");
+  PQXX_CHECK_EQUAL(notifs, 1, "Got unexpected number of notifications.");
+}
+} // namespace
+
+
+PQXX_REGISTER_TEST(test_078);