reduce noise in examples

examples/n-m/synchronizer.cxx

@@ -0,0 +1,49 @@
+/********************************************************************************
+ *    Copyright (C) 2020 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#include <fairmq/Device.h>
+#include <fairmq/runDevice.h>
+
+#include <string>
+#include <cstdint>
+
+using namespace std;
+namespace bpo = boost::program_options;
+
+class Synchronizer : public FairMQDevice
+{
+  public:
+    Synchronizer()
+        : fTimeframeId(0)
+    {}
+    ~Synchronizer() = default;
+
+  protected:
+    bool ConditionalRun() override
+    {
+        FairMQMessagePtr msg(NewSimpleMessage(fTimeframeId));
+
+        if (Send(msg, "sync") > 0) {
+            if (++fTimeframeId == UINT16_MAX - 1) {
+                fTimeframeId = 0;
+            }
+        } else {
+            return false;
+        }
+
+        return true;
+    }
+
+    uint16_t fTimeframeId;
+};
+
+void addCustomOptions(bpo::options_description& /* options */) {}
+std::unique_ptr<fair::mq::Device> getDevice(FairMQProgOptions& /* config */)
+{
+    return std::make_unique<Synchronizer>();
+}