Add qc example

examples/qc/runSampler.cxx

@@ -0,0 +1,55 @@
+/********************************************************************************
+ *    Copyright (C) 2014 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 "runFairMQDevice.h"
+#include "FairMQDevice.h"
+
+#include <thread> // this_thread::sleep_for
+#include <chrono>
+
+class Sampler : public FairMQDevice
+{
+  public:
+    Sampler()
+        : fMaxIterations(0)
+        , fNumIterations(0)
+    {}
+
+  protected:
+    uint64_t fMaxIterations;
+    uint64_t fNumIterations;
+
+    virtual void InitTask()
+    {
+        fMaxIterations = fConfig->GetProperty<uint64_t>("max-iterations");
+    }
+
+    virtual bool ConditionalRun()
+    {
+        FairMQMessagePtr msg(NewMessage(1000));
+
+        if (Send(msg, "data1") < 0) {
+            return false;
+        } else if (fMaxIterations > 0 && ++fNumIterations >= fMaxIterations) {
+            LOG(info) << "Configured maximum number of iterations reached. Leaving RUNNING state.";
+            return false;
+        }
+
+        std::this_thread::sleep_for(std::chrono::milliseconds(1));
+
+        return true;
+    }
+};
+
+namespace bpo = boost::program_options;
+void addCustomOptions(bpo::options_description& options)
+{
+    options.add_options()
+        ("max-iterations", bpo::value<uint64_t>()->default_value(0), "Maximum number of iterations of Run/ConditionalRun/OnData (0 - infinite)");
+}
+FairMQDevicePtr getDevice(const fair::mq::ProgOptions& /*config*/) { return new Sampler(); }