Refactor the examples after move from FairRoot

examples/multipart/Sampler.cxx

@@ -0,0 +1,77 @@
+/********************************************************************************
+ *    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"
+#include "Header.h"
+
+using namespace std;
+
+namespace example_multipart
+{
+
+Sampler::Sampler()
+    : fMaxIterations(5)
+    , fNumIterations(0)
+{
+}
+
+void Sampler::InitTask()
+{
+    fMaxIterations = fConfig->GetValue<uint64_t>("max-iterations");
+}
+
+bool Sampler::ConditionalRun()
+{
+    Header header;
+    header.stopFlag = 0;
+
+    // Set stopFlag to 1 for last message.
+    if (fMaxIterations > 0 && fNumIterations == fMaxIterations - 1)
+    {
+        header.stopFlag = 1;
+    }
+    LOG(info) << "Sending header with stopFlag: " << header.stopFlag;
+
+    FairMQParts parts;
+
+    // NewSimpleMessage creates a copy of the data and takes care of its destruction (after the transfer takes place).
+    // Should only be used for small data because of the cost of an additional copy
+    parts.AddPart(NewSimpleMessage(header));
+    parts.AddPart(NewMessage(1000));
+
+    LOG(info) << "Sending body of size: " << parts.At(1)->GetSize();
+
+    Send(parts, "data");
+
+    // Go out of the sending loop if the stopFlag was sent.
+    if (fMaxIterations > 0 && ++fNumIterations >= fMaxIterations)
+    {
+        LOG(info) << "Configured maximum number of iterations reached. Leaving RUNNING state.";
+        return false;
+    }
+
+    // Wait a second to keep the output readable.
+    this_thread::sleep_for(chrono::seconds(1));
+
+    return true;
+}
+
+Sampler::~Sampler()
+{
+}
+
+} // namespace example_multipart