Refactor the examples after move from FairRoot

examples/1-1/Sampler.cxx

@@ -0,0 +1,76 @@
+/********************************************************************************
+ *    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"                       *
+ ********************************************************************************/
+/**
+ * Sampler.cpp
+ *
+ * @since 2014-10-10
+ * @author A. Rybalchenko
+ */
+
+#include <thread> // this_thread::sleep_for
+#include <chrono>
+
+#include "Sampler.h"
+
+using namespace std;
+
+namespace example_1_1
+{
+
+Sampler::Sampler()
+    : fText()
+    , fMaxIterations(0)
+    , fNumIterations(0)
+{
+}
+
+void Sampler::InitTask()
+{
+    // Get the fText and fMaxIterations values from the command line options (via fConfig)
+    fText = fConfig->GetValue<string>("text");
+    fMaxIterations = fConfig->GetValue<uint64_t>("max-iterations");
+}
+
+bool Sampler::ConditionalRun()
+{
+    // create a copy of the data with new(), that will be deleted after the transfer is complete
+    string* text = new string(fText);
+
+    // create message object with a pointer to the data buffer,
+    // its size,
+    // custom deletion function (called when transfer is done),
+    // and pointer to the object managing the data buffer
+    FairMQMessagePtr msg(NewMessage(const_cast<char*>(text->c_str()),
+                                    text->length(),
+                                    [](void* /*data*/, void* object) { delete static_cast<string*>(object); },
+                                    text));
+
+    LOG(info) << "Sending \"" << fText << "\"";
+
+    // in case of error or transfer interruption, return false to go to IDLE state
+    // successfull transfer will return number of bytes transfered (can be 0 if sending an empty message).
+    if (Send(msg, "data") < 0)
+    {
+        return false;
+    }
+    else if (fMaxIterations > 0 && ++fNumIterations >= fMaxIterations)
+    {
+        LOG(info) << "Configured maximum number of iterations reached. Leaving RUNNING state.";
+        return false;
+    }
+
+    this_thread::sleep_for(chrono::seconds(1));
+
+    return true;
+}
+
+Sampler::~Sampler()
+{
+}
+
+} // namespace example_1_1