Several FairMQ fixes and improvements:

- FairMQ: add possibility to poll on multiple channels.
- FairMQ: include command channel when polling on blocking calls (for unblocking without termination).
- FairMQ: move signal handler inside of FairMQDevice class (call FairMQDevice::CatchSignals() in the main function).
- FairMQ: add 'bool CheckCurrentState(statename)' (instead of 'GetCurrentState() == statename' that cannot be thread safe).
- FairMQDevice: add 'InteractiveStateLoop()' method that can be used to change states from the command line.
- FairMQDevice: add automatic transition to IDLE state if Run() exits without an external event.
- FairMQDevice: implement device reset.
- FairMQDevice: use unordered_map for device channels.
- FairMQChannel: improve address validation for channels.
- FairMQChannel: add ExpectsAnotherPart() method to check if another msg part is expected (old approach still works).
- FairMQ: remove invalid transition from the run files.
- FairMQFileSink: disable ROOT termination signal handler.
- Tutorial3: spawn xterm windows from start scripts without overlapping for better visibility.
- FairMQ Examples: update protobuf test and move its files to a common directory.
- FairMQStateMachine: improve feedback on invalid transitions (more readable).

fairmq/FairMQDevice.h

@@ -18,7 +18,7 @@
 #include <vector>
 #include <string>
 #include <iostream>
-#include <map>
+#include <unordered_map>
 
 #include "FairMQConfigurable.h"
 #include "FairMQStateMachine.h"
@@ -42,6 +42,8 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
 
     FairMQDevice();
 
+    void CatchSignals();
+
     virtual void LogSocketRates();
 
     void SortChannel(const std::string& name, const bool reindex = true);
@@ -49,6 +51,9 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
 
     void WaitForInitialValidation();
 
+    void InteractiveStateLoop();
+    void PrintInteractiveStateLoopHelp();
+
     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);
@@ -60,7 +65,7 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
 
     virtual ~FairMQDevice();
 
-    std::map< std::string,std::vector<FairMQChannel> > fChannels;
+    std::unordered_map< std::string,std::vector<FairMQChannel> > fChannels;
 
   protected:
     std::string fId;
@@ -74,7 +79,7 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
 
     int fLogIntervalInMs;
 
-    FairMQSocket* fCommandSocket;
+    FairMQSocket* fCmdSocket;
 
     FairMQTransportFactory* fTransportFactory;
 
@@ -95,7 +100,7 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
     void ResetWrapper();
     virtual void Reset();
 
-    virtual void Shutdown();
+    void Shutdown();
 
     void Terminate();
     void SendCommand(const std::string& command);
@@ -108,6 +113,9 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
     boost::condition_variable fInitialValidationCondition;
     boost::mutex fInitialValidationMutex;
 
+    void SignalHandler(int signal);
+    bool fCatchingSignals;
+
     /// Copy Constructor
     FairMQDevice(const FairMQDevice&);
     FairMQDevice operator=(const FairMQDevice&);