Enable new callback API

- OnData() channel data handler.
 - ConditionalRun() for devices without incoming data.
 - Header file with common main(), to be extended with getDevice/addCustomOptions.
 - Update examples (MQ/Tutorial3) to use the new API and config.
 - NewSimpleMessage() for simpler creation of small messages (additional copy).
 - Replace SetProperty/GetProperty with fConfig access.
 - Runtime configurable channel names for common devices.
 - Configurable logging interval per channel.
 - FairMQMultiplier for distributing same data to multiple outputs.
 - Cleanup state machine messages.
 - Cmd option to toggle signal handling.
 - Simpler API for send/receive timeouts.
 - Enable --log-to-file.
 - Fix coverity issues, warnings.
 - Various code cleanup and minor tweaks.

examples/MQ/6-multiple-channels/runExample6Sampler.cxx

@@ -5,55 +5,19 @@
  *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *  
  *                  copied verbatim in the file "LICENSE"                       *
  ********************************************************************************/
-/**
- * runExample6Sampler.cxx
- *
- * @since 2013-04-23
- * @author D. Klein, A. Rybalchenko
- */
 
-#include "boost/program_options.hpp"
-
-#include "FairMQLogger.h"
-#include "FairMQProgOptions.h"
+#include "runFairMQDevice.h"
 #include "FairMQExample6Sampler.h"
 
-using namespace boost::program_options;
+namespace bpo = boost::program_options;
 
-int main(int argc, char** argv)
+void addCustomOptions(bpo::options_description& options)
 {
-    try
-    {
-        std::string text;
-
-        options_description samplerOptions("Sampler options");
-        samplerOptions.add_options()
-            ("text", value<std::string>(&text)->default_value("Hello"), "Text to send out");
-
-        FairMQProgOptions config;
-        config.AddToCmdLineOptions(samplerOptions);
-        config.ParseAll(argc, argv);
-
-        FairMQExample6Sampler sampler;
-        sampler.CatchSignals();
-        sampler.SetConfig(config);
-        sampler.SetProperty(FairMQExample6Sampler::Text, text);
-
-        sampler.ChangeState("INIT_DEVICE");
-        sampler.WaitForEndOfState("INIT_DEVICE");
-
-        sampler.ChangeState("INIT_TASK");
-        sampler.WaitForEndOfState("INIT_TASK");
-
-        sampler.ChangeState("RUN");
-        sampler.InteractiveStateLoop();
-    }
-    catch (std::exception& e)
-    {
-        LOG(ERROR) << "Unhandled Exception reached the top of main: "
-                   << e.what() << ", application will now exit";
-        return 1;
-    }
-
-    return 0;
+    options.add_options()
+        ("text", bpo::value<std::string>()->default_value("Hello"), "Text to send out");
+}
+
+FairMQDevice* getDevice(const FairMQProgOptions& /*config*/)
+{
+    return new FairMQExample6Sampler();
 }