Allow to limit number of messages for the Benchmark sampler and sink

fairmq/devices/FairMQSink.h

@@ -15,15 +15,33 @@
 #ifndef FAIRMQSINK_H_
 #define FAIRMQSINK_H_
 
+#include <string>
+
 #include "FairMQDevice.h"
 
 class FairMQSink : public FairMQDevice
 {
   public:
+    enum
+    {
+        NumMsgs = FairMQDevice::Last,
+        Last
+    };
+
     FairMQSink();
     virtual ~FairMQSink();
 
+    virtual void SetProperty(const int key, const std::string& value);
+    virtual std::string GetProperty(const int key, const std::string& default_ = "");
+    virtual void SetProperty(const int key, const int value);
+    virtual int GetProperty(const int key, const int default_ = 0);
+
+    virtual std::string GetPropertyDescription(const int key);
+    virtual void ListProperties();
+
   protected:
+    int fNumMsgs;
+
     virtual void Run();
 };