reduce noise in examples

examples/dds/sampler.cxx

@@ -0,0 +1,71 @@
+/********************************************************************************
+ *    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 <fairmq/Device.h>
+#include <fairmq/runDevice.h>
+
+#include <cstdint> // uint64_t
+
+namespace bpo = boost::program_options;
+
+class Sampler : public FairMQDevice
+{
+  public:
+    Sampler()
+        : fIterations(0)
+        , fCounter(0)
+    {}
+
+    void InitTask() override
+    {
+        fIterations = fConfig->GetValue<uint64_t>("iterations");
+    }
+
+  protected:
+    bool ConditionalRun() override
+    {
+        // 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
+        FairMQMessagePtr msg(NewSimpleMessage("Data"));
+
+        LOG(info) << "Sending \"Data\"";
+
+        // 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, "data1") < 0) {
+            return false;
+        }
+
+        if (fIterations > 0) {
+            ++fCounter;
+            if (fCounter >= fIterations) {
+                LOG(info) << "Sent " << fCounter << " messages. Finished.";
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+  private:
+    uint64_t fIterations;
+    uint64_t fCounter;
+};
+
+void addCustomOptions(bpo::options_description& options)
+{
+    options.add_options()(
+        "iterations,i",
+        bpo::value<uint64_t>()->default_value(1000),
+        "Maximum number of iterations of Run/ConditionalRun/OnData (0 - infinite)");
+}
+
+std::unique_ptr<fair::mq::Device> getDevice(fair::mq::ProgOptions& /*config*/)
+{
+    return std::make_unique<Sampler>();
+}