Adding multiple transports support & other fixes:

- Avoid polling when only one input channel is used.
 - Send only handles for shared memory transport.
 - Avoid waiting in the rate logger thread when nothing to log.
 - Hide warnings from generated files
 - Fix #483

examples/MQ/multiple-transports/FairMQExampleMTSampler1.cxx

@@ -0,0 +1,68 @@
+/********************************************************************************
+ *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             * 
+ *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *  
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#include "FairMQExampleMTSampler1.h"
+#include "FairMQLogger.h"
+#include "FairMQProgOptions.h"
+
+using namespace std;
+
+FairMQExampleMTSampler1::FairMQExampleMTSampler1()
+    : fAckListener()
+{
+}
+
+void FairMQExampleMTSampler1::InitTask()
+{
+}
+
+void FairMQExampleMTSampler1::PreRun()
+{
+    fAckListener = thread(&FairMQExampleMTSampler1::ListenForAcks, this);
+}
+
+bool FairMQExampleMTSampler1::ConditionalRun()
+{
+    // Creates a message using the transport of channel data1
+    FairMQMessagePtr msg(NewMessageFor("data1", 0, 1000000));
+
+    // 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;
+    }
+
+    return true;
+}
+
+void FairMQExampleMTSampler1::PostRun()
+{
+    fAckListener.join();
+}
+
+void FairMQExampleMTSampler1::ListenForAcks()
+{
+    uint64_t numAcks = 0;
+
+    while (CheckCurrentState(RUNNING))
+    {
+        FairMQMessagePtr ack(NewMessageFor("ack", 0));
+        if (Receive(ack, "ack") < 0)
+        {
+            break;
+        }
+        ++numAcks;
+    }
+
+    LOG(INFO) << "Acknowledged " << numAcks << " messages";
+}
+
+FairMQExampleMTSampler1::~FairMQExampleMTSampler1()
+{
+}