reduce noise in examples

examples/req-rep/client.cxx

@@ -0,0 +1,83 @@
+/********************************************************************************
+ *    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 <chrono>
+#include <string>
+#include <thread> // this_thread::sleep_for
+
+namespace bpo = boost::program_options;
+
+class Client : public FairMQDevice
+{
+  public:
+    Client()
+        : fMaxIterations(0)
+        , fNumIterations(0)
+    {}
+
+    void InitTask() override
+    {
+        fText = fConfig->GetProperty<std::string>("text");
+        fMaxIterations = fConfig->GetProperty<uint64_t>("max-iterations");
+    }
+
+    bool ConditionalRun() override
+    {
+
+        std::string* text = new std::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 req(NewMessage(const_cast<char*>(text->c_str()), // data
+                                                            text->length(), // size
+                                                            [](void* /*data*/, void* object) { delete static_cast<std::string*>(object); }, // deletion callback
+                                                            text)); // object that manages the data
+        FairMQMessagePtr rep(NewMessage());
+
+        LOG(info) << "Sending \"" << fText << "\" to server.";
+
+        if (Send(req, "data") > 0) {
+            if (Receive(rep, "data") >= 0) {
+                LOG(info) << "Received reply from server: \"" << std::string(static_cast<char*>(rep->GetData()), rep->GetSize()) << "\"";
+
+                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::seconds(1));
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+  private:
+    std::string fText;
+    uint64_t fMaxIterations;
+    uint64_t fNumIterations;
+};
+
+void addCustomOptions(bpo::options_description& options)
+{
+    options.add_options()
+        ("text", bpo::value<std::string>()->default_value("Hello"), "Text to send out")
+        ("max-iterations", bpo::value<uint64_t>()->default_value(0), "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<Client>();
+}