Fix CIDs 10587, 10813, 10911, 10912, 10402, 10403, 10577, 10578, 10579, 10848, 10861, 10865, 10868, 10910.

Move classes inheriting from device to a subdirectory.
Make sure only protobuf library installed by fairsoft is used.
Cleanup FairMQDevice and fix some initialization list warnings.
Loop to duplicate input files in Sampler.
Add some documentation to FairMQ.

fairmq/CMakeLists.txt

@@ -7,6 +7,7 @@
  ################################################################################
 set(INCLUDE_DIRECTORIES
   ${CMAKE_SOURCE_DIR}/fairmq
+  ${CMAKE_SOURCE_DIR}/fairmq/devices
   ${Boost_INCLUDE_DIR}
 )
 
@@ -48,12 +49,12 @@ set(SRCS
   "FairMQMessage.cxx"
   "FairMQSocket.cxx"
   "FairMQDevice.cxx"
-  "FairMQBenchmarkSampler.cxx"
+  "devices/FairMQBenchmarkSampler.cxx"
-  "FairMQSink.cxx"
+  "devices/FairMQSink.cxx"
-  "FairMQBuffer.cxx"
+  "devices/FairMQBuffer.cxx"
-  "FairMQProxy.cxx"
+  "devices/FairMQProxy.cxx"
-  "FairMQSplitter.cxx"
+  "devices/FairMQSplitter.cxx"
-  "FairMQMerger.cxx"
+  "devices/FairMQMerger.cxx"
   "FairMQPoller.cxx"
 )
 
@@ -101,7 +102,6 @@ endif(NANOMSG_FOUND)
 
 set(DEPENDENCIES
   ${DEPENDENCIES}
-  ${CMAKE_THREAD_LIBS_INIT}
   boost_thread boost_timer boost_system
 )
 

fairmq/FairMQDevice.cxx

@@ -20,6 +20,8 @@
 
 FairMQDevice::FairMQDevice()
     : fNumIoThreads(1)
+    , fNumInputs(0)
+    , fNumOutputs(0)
     , fPayloadInputs(new vector<FairMQSocket*>())
     , fPayloadOutputs(new vector<FairMQSocket*>())
     , fLogIntervalInMs(1000)
@@ -32,32 +34,22 @@ void FairMQDevice::Init()
     LOG(INFO) << ">>>>>>> Init <<<<<<<";
     LOG(INFO) << "numIoThreads: " << fNumIoThreads;
 
-    fInputAddress = new vector<string>(fNumInputs);
-    fInputMethod = new vector<string>();
-    fInputSocketType = new vector<string>();
-    fInputSndBufSize = new vector<int>();
-    fInputRcvBufSize = new vector<int>();
-
     for (int i = 0; i < fNumInputs; ++i)
     {
-        fInputMethod->push_back("connect"); // default value, can be overwritten in configuration
+        fInputAddress.push_back("ipc://default"); // default value, can be overwritten in configuration
-        fInputSocketType->push_back("sub"); // default value, can be overwritten in configuration
+        fInputMethod.push_back("connect"); // default value, can be overwritten in configuration
-        fInputSndBufSize->push_back(10000); // default value, can be overwritten in configuration
+        fInputSocketType.push_back("sub"); // default value, can be overwritten in configuration
-        fInputRcvBufSize->push_back(10000); // default value, can be overwritten in configuration
+        fInputSndBufSize.push_back(10000); // default value, can be overwritten in configuration
+        fInputRcvBufSize.push_back(10000); // default value, can be overwritten in configuration
     }
 
-    fOutputAddress = new vector<string>(fNumOutputs);
-    fOutputMethod = new vector<string>();
-    fOutputSocketType = new vector<string>();
-    fOutputSndBufSize = new vector<int>();
-    fOutputRcvBufSize = new vector<int>();
-
     for (int i = 0; i < fNumOutputs; ++i)
     {
-        fOutputMethod->push_back("bind");    // default value, can be overwritten in configuration
+        fOutputAddress.push_back("ipc://default"); // default value, can be overwritten in configuration
-        fOutputSocketType->push_back("pub"); // default value, can be overwritten in configuration
+        fOutputMethod.push_back("bind");    // default value, can be overwritten in configuration
-        fOutputSndBufSize->push_back(10000); // default value, can be overwritten in configuration
+        fOutputSocketType.push_back("pub"); // default value, can be overwritten in configuration
-        fOutputRcvBufSize->push_back(10000); // default value, can be overwritten in configuration
+        fOutputSndBufSize.push_back(10000); // default value, can be overwritten in configuration
+        fOutputRcvBufSize.push_back(10000); // default value, can be overwritten in configuration
     }
 }
 
@@ -67,26 +59,27 @@ void FairMQDevice::InitInput()
 
     for (int i = 0; i < fNumInputs; ++i)
     {
-        FairMQSocket* socket = fTransportFactory->CreateSocket(fInputSocketType->at(i), i, fNumIoThreads);
+        FairMQSocket* socket = fTransportFactory->CreateSocket(fInputSocketType.at(i), i, fNumIoThreads);
 
-        socket->SetOption("snd-hwm", &fInputSndBufSize->at(i), sizeof(fInputSndBufSize->at(i)));
+        socket->SetOption("snd-hwm", &fInputSndBufSize.at(i), sizeof(fInputSndBufSize.at(i)));
-        socket->SetOption("rcv-hwm", &fInputRcvBufSize->at(i), sizeof(fInputRcvBufSize->at(i)));
+        socket->SetOption("rcv-hwm", &fInputRcvBufSize.at(i), sizeof(fInputRcvBufSize.at(i)));
 
         fPayloadInputs->push_back(socket);
 
         try
         {
-            if (fInputMethod->at(i) == "bind")
+            if (fInputMethod.at(i) == "bind")
             {
-                fPayloadInputs->at(i)->Bind(fInputAddress->at(i));
+                fPayloadInputs->at(i)->Bind(fInputAddress.at(i));
             }
             else
             {
-                fPayloadInputs->at(i)->Connect(fInputAddress->at(i));
+                fPayloadInputs->at(i)->Connect(fInputAddress.at(i));
             }
         }
         catch (std::out_of_range& e)
         {
+            LOG(ERROR) << e.what();
         }
     }
 }
@@ -97,26 +90,27 @@ void FairMQDevice::InitOutput()
 
     for (int i = 0; i < fNumOutputs; ++i)
     {
-        FairMQSocket* socket = fTransportFactory->CreateSocket(fOutputSocketType->at(i), i, fNumIoThreads);
+        FairMQSocket* socket = fTransportFactory->CreateSocket(fOutputSocketType.at(i), i, fNumIoThreads);
 
-        socket->SetOption("snd-hwm", &fOutputSndBufSize->at(i), sizeof(fOutputSndBufSize->at(i)));
+        socket->SetOption("snd-hwm", &fOutputSndBufSize.at(i), sizeof(fOutputSndBufSize.at(i)));
-        socket->SetOption("rcv-hwm", &fOutputRcvBufSize->at(i), sizeof(fOutputRcvBufSize->at(i)));
+        socket->SetOption("rcv-hwm", &fOutputRcvBufSize.at(i), sizeof(fOutputRcvBufSize.at(i)));
 
         fPayloadOutputs->push_back(socket);
 
         try
         {
-            if (fOutputMethod->at(i) == "bind")
+            if (fOutputMethod.at(i) == "bind")
             {
-                fPayloadOutputs->at(i)->Bind(fOutputAddress->at(i));
+                fPayloadOutputs->at(i)->Bind(fOutputAddress.at(i));
             }
             else
             {
-                fPayloadOutputs->at(i)->Connect(fOutputAddress->at(i));
+                fPayloadOutputs->at(i)->Connect(fOutputAddress.at(i));
             }
         }
         catch (std::out_of_range& e)
         {
+            LOG(ERROR) << e.what();
         }
     }
 }
@@ -138,28 +132,28 @@ void FairMQDevice::SetProperty(const int key, const string& value, const int slo
             fId = value;
             break;
         case InputAddress:
-            fInputAddress->erase(fInputAddress->begin() + slot);
+            fInputAddress.erase(fInputAddress.begin() + slot);
-            fInputAddress->insert(fInputAddress->begin() + slot, value);
+            fInputAddress.insert(fInputAddress.begin() + slot, value);
             break;
         case OutputAddress:
-            fOutputAddress->erase(fOutputAddress->begin() + slot);
+            fOutputAddress.erase(fOutputAddress.begin() + slot);
-            fOutputAddress->insert(fOutputAddress->begin() + slot, value);
+            fOutputAddress.insert(fOutputAddress.begin() + slot, value);
             break;
         case InputMethod:
-            fInputMethod->erase(fInputMethod->begin() + slot);
+            fInputMethod.erase(fInputMethod.begin() + slot);
-            fInputMethod->insert(fInputMethod->begin() + slot, value);
+            fInputMethod.insert(fInputMethod.begin() + slot, value);
             break;
         case OutputMethod:
-            fOutputMethod->erase(fOutputMethod->begin() + slot);
+            fOutputMethod.erase(fOutputMethod.begin() + slot);
-            fOutputMethod->insert(fOutputMethod->begin() + slot, value);
+            fOutputMethod.insert(fOutputMethod.begin() + slot, value);
             break;
         case InputSocketType:
-            fInputSocketType->erase(fInputSocketType->begin() + slot);
+            fInputSocketType.erase(fInputSocketType.begin() + slot);
-            fInputSocketType->insert(fInputSocketType->begin() + slot, value);
+            fInputSocketType.insert(fInputSocketType.begin() + slot, value);
             break;
         case OutputSocketType:
-            fOutputSocketType->erase(fOutputSocketType->begin() + slot);
+            fOutputSocketType.erase(fOutputSocketType.begin() + slot);
-            fOutputSocketType->insert(fOutputSocketType->begin() + slot, value);
+            fOutputSocketType.insert(fOutputSocketType.begin() + slot, value);
             break;
         default:
             FairMQConfigurable::SetProperty(key, value, slot);
@@ -185,20 +179,20 @@ void FairMQDevice::SetProperty(const int key, const int value, const int slot /*
             fLogIntervalInMs = value;
             break;
         case InputSndBufSize:
-            fInputSndBufSize->erase(fInputSndBufSize->begin() + slot);
+            fInputSndBufSize.erase(fInputSndBufSize.begin() + slot);
-            fInputSndBufSize->insert(fInputSndBufSize->begin() + slot, value);
+            fInputSndBufSize.insert(fInputSndBufSize.begin() + slot, value);
             break;
         case InputRcvBufSize:
-            fInputRcvBufSize->erase(fInputRcvBufSize->begin() + slot);
+            fInputRcvBufSize.erase(fInputRcvBufSize.begin() + slot);
-            fInputRcvBufSize->insert(fInputRcvBufSize->begin() + slot, value);
+            fInputRcvBufSize.insert(fInputRcvBufSize.begin() + slot, value);
             break;
         case OutputSndBufSize:
-            fOutputSndBufSize->erase(fOutputSndBufSize->begin() + slot);
+            fOutputSndBufSize.erase(fOutputSndBufSize.begin() + slot);
-            fOutputSndBufSize->insert(fOutputSndBufSize->begin() + slot, value);
+            fOutputSndBufSize.insert(fOutputSndBufSize.begin() + slot, value);
             break;
         case OutputRcvBufSize:
-            fOutputRcvBufSize->erase(fOutputRcvBufSize->begin() + slot);
+            fOutputRcvBufSize.erase(fOutputRcvBufSize.begin() + slot);
-            fOutputRcvBufSize->insert(fOutputRcvBufSize->begin() + slot, value);
+            fOutputRcvBufSize.insert(fOutputRcvBufSize.begin() + slot, value);
             break;
         default:
             FairMQConfigurable::SetProperty(key, value, slot);
@@ -214,17 +208,17 @@ string FairMQDevice::GetProperty(const int key, const string& default_ /*= ""*/,
         case Id:
             return fId;
         case InputAddress:
-            return fInputAddress->at(slot);
+            return fInputAddress.at(slot);
         case OutputAddress:
-            return fOutputAddress->at(slot);
+            return fOutputAddress.at(slot);
         case InputMethod:
-            return fInputMethod->at(slot);
+            return fInputMethod.at(slot);
         case OutputMethod:
-            return fOutputMethod->at(slot);
+            return fOutputMethod.at(slot);
         case InputSocketType:
-            return fInputSocketType->at(slot);
+            return fInputSocketType.at(slot);
         case OutputSocketType:
-            return fOutputSocketType->at(slot);
+            return fOutputSocketType.at(slot);
         default:
             return FairMQConfigurable::GetProperty(key, default_, slot);
     }
@@ -240,13 +234,13 @@ int FairMQDevice::GetProperty(const int key, const int default_ /*= 0*/, const i
         case LogIntervalInMs:
             return fLogIntervalInMs;
         case InputSndBufSize:
-            return fInputSndBufSize->at(slot);
+            return fInputSndBufSize.at(slot);
         case InputRcvBufSize:
-            return fInputRcvBufSize->at(slot);
+            return fInputRcvBufSize.at(slot);
         case OutputSndBufSize:
-            return fOutputSndBufSize->at(slot);
+            return fOutputSndBufSize.at(slot);
         case OutputRcvBufSize:
-            return fOutputRcvBufSize->at(slot);
+            return fOutputRcvBufSize.at(slot);
         default:
             return FairMQConfigurable::GetProperty(key, default_, slot);
     }
@@ -264,20 +258,20 @@ void FairMQDevice::LogSocketRates()
 
     timestamp_t timeSinceLastLog_ms;
 
-    unsigned long* bytesInput = new unsigned long[fNumInputs];
+    vector<unsigned long> bytesInput(fNumInputs);
-    unsigned long* messagesInput = new unsigned long[fNumInputs];
+    vector<unsigned long> messagesInput(fNumInputs);
-    unsigned long* bytesOutput = new unsigned long[fNumOutputs];
+    vector<unsigned long> bytesOutput(fNumOutputs);
-    unsigned long* messagesOutput = new unsigned long[fNumOutputs];
+    vector<unsigned long> messagesOutput(fNumOutputs);
 
-    unsigned long* bytesInputNew = new unsigned long[fNumInputs];
+    vector<unsigned long> bytesInputNew(fNumInputs);
-    unsigned long* messagesInputNew = new unsigned long[fNumInputs];
+    vector<unsigned long> messagesInputNew(fNumInputs);
-    unsigned long* bytesOutputNew = new unsigned long[fNumOutputs];
+    vector<unsigned long> bytesOutputNew(fNumOutputs);
-    unsigned long* messagesOutputNew = new unsigned long[fNumOutputs];
+    vector<unsigned long> messagesOutputNew(fNumOutputs);
 
-    double* megabytesPerSecondInput = new double[fNumInputs];
+    vector<double> megabytesPerSecondInput(fNumInputs);
-    double* messagesPerSecondInput = new double[fNumInputs];
+    vector<double> messagesPerSecondInput(fNumInputs);
-    double* megabytesPerSecondOutput = new double[fNumOutputs];
+    vector<double> megabytesPerSecondOutput(fNumOutputs);
-    double* messagesPerSecondOutput = new double[fNumOutputs];
+    vector<double> messagesPerSecondOutput(fNumOutputs);
 
     // Temp stuff for process termination
     // bool receivedSomething = false;
@@ -289,16 +283,16 @@ void FairMQDevice::LogSocketRates()
     int i = 0;
     for (vector<FairMQSocket*>::iterator itr = fPayloadInputs->begin(); itr != fPayloadInputs->end(); itr++)
     {
-        bytesInput[i] = (*itr)->GetBytesRx();
+        bytesInput.at(i) = (*itr)->GetBytesRx();
-        messagesInput[i] = (*itr)->GetMessagesRx();
+        messagesInput.at(i) = (*itr)->GetMessagesRx();
         ++i;
     }
 
     i = 0;
     for (vector<FairMQSocket*>::iterator itr = fPayloadOutputs->begin(); itr != fPayloadOutputs->end(); itr++)
     {
-        bytesOutput[i] = (*itr)->GetBytesTx();
+        bytesOutput.at(i) = (*itr)->GetBytesTx();
-        messagesOutput[i] = (*itr)->GetMessagesTx();
+        messagesOutput.at(i) = (*itr)->GetMessagesTx();
         ++i;
     }
 
@@ -316,20 +310,20 @@ void FairMQDevice::LogSocketRates()
 
             for (vector<FairMQSocket*>::iterator itr = fPayloadInputs->begin(); itr != fPayloadInputs->end(); itr++)
             {
-                bytesInputNew[i] = (*itr)->GetBytesRx();
+                bytesInputNew.at(i) = (*itr)->GetBytesRx();
-                megabytesPerSecondInput[i] = ((double)(bytesInputNew[i] - bytesInput[i]) / (1024. * 1024.)) / (double)timeSinceLastLog_ms * 1000.;
+                megabytesPerSecondInput.at(i) = ((double)(bytesInputNew.at(i) - bytesInput.at(i)) / (1024. * 1024.)) / (double)timeSinceLastLog_ms * 1000.;
-                bytesInput[i] = bytesInputNew[i];
+                bytesInput.at(i) = bytesInputNew.at(i);
-                messagesInputNew[i] = (*itr)->GetMessagesRx();
+                messagesInputNew.at(i) = (*itr)->GetMessagesRx();
-                messagesPerSecondInput[i] = (double)(messagesInputNew[i] - messagesInput[i]) / (double)timeSinceLastLog_ms * 1000.;
+                messagesPerSecondInput.at(i) = (double)(messagesInputNew.at(i) - messagesInput.at(i)) / (double)timeSinceLastLog_ms * 1000.;
-                messagesInput[i] = messagesInputNew[i];
+                messagesInput.at(i) = messagesInputNew.at(i);
 
-                LOG(DEBUG) << "#" << fId << "." << (*itr)->GetId() << ": " << messagesPerSecondInput[i] << " msg/s, " << megabytesPerSecondInput[i] << " MB/s";
+                LOG(DEBUG) << "#" << fId << "." << (*itr)->GetId() << ": " << messagesPerSecondInput.at(i) << " msg/s, " << megabytesPerSecondInput.at(i) << " MB/s";
 
                 // Temp stuff for process termination
-                // if ( !receivedSomething && messagesPerSecondInput[i] > 0 ) {
+                // if ( !receivedSomething && messagesPerSecondInput.at(i) > 0 ) {
                 //      receivedSomething = true;
                 //    }
-                //    if ( receivedSomething && messagesPerSecondInput[i] == 0 ) {
+                //    if ( receivedSomething && messagesPerSecondInput.at(i) == 0 ) {
                 //      cout << "Did not receive anything on socket " << i << " for " << didNotReceiveFor++ << " seconds." << endl;
                 //    } else {
                 //      didNotReceiveFor = 0;
@@ -343,21 +337,21 @@ void FairMQDevice::LogSocketRates()
 
             for (vector<FairMQSocket*>::iterator itr = fPayloadOutputs->begin(); itr != fPayloadOutputs->end(); itr++)
             {
-                bytesOutputNew[i] = (*itr)->GetBytesTx();
+                bytesOutputNew.at(i) = (*itr)->GetBytesTx();
-                megabytesPerSecondOutput[i] = ((double)(bytesOutputNew[i] - bytesOutput[i]) / (1024. * 1024.)) / (double)timeSinceLastLog_ms * 1000.;
+                megabytesPerSecondOutput.at(i) = ((double)(bytesOutputNew.at(i) - bytesOutput.at(i)) / (1024. * 1024.)) / (double)timeSinceLastLog_ms * 1000.;
-                bytesOutput[i] = bytesOutputNew[i];
+                bytesOutput.at(i) = bytesOutputNew.at(i);
-                messagesOutputNew[i] = (*itr)->GetMessagesTx();
+                messagesOutputNew.at(i) = (*itr)->GetMessagesTx();
-                messagesPerSecondOutput[i] = (double)(messagesOutputNew[i] - messagesOutput[i]) / (double)timeSinceLastLog_ms * 1000.;
+                messagesPerSecondOutput.at(i) = (double)(messagesOutputNew.at(i) - messagesOutput.at(i)) / (double)timeSinceLastLog_ms * 1000.;
-                messagesOutput[i] = messagesOutputNew[i];
+                messagesOutput.at(i) = messagesOutputNew.at(i);
 
-                LOG(DEBUG) << "#" << fId << "." << (*itr)->GetId() << ": " << messagesPerSecondOutput[i] << " msg/s, " << megabytesPerSecondOutput[i]
+                LOG(DEBUG) << "#" << fId << "." << (*itr)->GetId() << ": " << messagesPerSecondOutput.at(i) << " msg/s, " << megabytesPerSecondOutput.at(i)
                            << " MB/s";
 
                 // Temp stuff for process termination
-                // if ( !sentSomething && messagesPerSecondOutput[i] > 0 ) {
+                // if ( !sentSomething && messagesPerSecondOutput.at(i) > 0 ) {
                 //      sentSomething = true;
                 //    }
-                //    if ( sentSomething && messagesPerSecondOutput[i] == 0 ) {
+                //    if ( sentSomething && messagesPerSecondOutput.at(i) == 0 ) {
                 //      cout << "Did not send anything on socket " << i << " for " << didNotSendFor++ << " seconds." << endl;
                 //    } else {
                 //      didNotSendFor = 0;
@@ -388,21 +382,6 @@ void FairMQDevice::LogSocketRates()
         }
     }
 
-    delete[] bytesInput;
-    delete[] messagesInput;
-    delete[] bytesOutput;
-    delete[] messagesOutput;
-
-    delete[] bytesInputNew;
-    delete[] messagesInputNew;
-    delete[] bytesOutputNew;
-    delete[] messagesOutputNew;
-
-    delete[] megabytesPerSecondInput;
-    delete[] messagesPerSecondInput;
-    delete[] megabytesPerSecondOutput;
-    delete[] messagesPerSecondOutput;
-
     LOG(INFO) << ">>>>>>> stopping rateLogger <<<<<<<";
 }
 
@@ -423,9 +402,6 @@ void FairMQDevice::Shutdown()
     {
         (*itr)->Close();
     }
-
-    // LOG(INFO) << ">>>>>>> closing context <<<<<<<";
-    // fPayloadContext->Close();
 }
 
 FairMQDevice::~FairMQDevice()
@@ -440,8 +416,6 @@ FairMQDevice::~FairMQDevice()
         delete (*itr);
     }
 
-    delete fInputAddress;
-    delete fOutputAddress;
     delete fPayloadInputs;
     delete fPayloadOutputs;
 }

fairmq/FairMQDevice.h

@@ -69,28 +69,29 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
   protected:
     string fId;
     int fNumIoThreads;
-    FairMQTransportFactory* fTransportFactory;
 
     int fNumInputs;
     int fNumOutputs;
 
-    vector<string>* fInputAddress;
+    vector<string> fInputAddress;
-    vector<string>* fInputMethod;
+    vector<string> fInputMethod;
-    vector<string>* fInputSocketType;
+    vector<string> fInputSocketType;
-    vector<int>* fInputSndBufSize;
+    vector<int> fInputSndBufSize;
-    vector<int>* fInputRcvBufSize;
+    vector<int> fInputRcvBufSize;
 
-    vector<string>* fOutputAddress;
+    vector<string> fOutputAddress;
-    vector<string>* fOutputMethod;
+    vector<string> fOutputMethod;
-    vector<string>* fOutputSocketType;
+    vector<string> fOutputSocketType;
-    vector<int>* fOutputSndBufSize;
+    vector<int> fOutputSndBufSize;
-    vector<int>* fOutputRcvBufSize;
+    vector<int> fOutputRcvBufSize;
 
     vector<FairMQSocket*>* fPayloadInputs;
     vector<FairMQSocket*>* fPayloadOutputs;
 
     int fLogIntervalInMs;
 
+    FairMQTransportFactory* fTransportFactory;
+
     virtual void Init();
     virtual void Run();
     virtual void Pause();

fairmq/FairMQLogger.cxx

@@ -36,7 +36,7 @@ std::ostringstream& FairMQLogger::Log(int type)
     timestamp_t ms = tm / 1000.0L;
     timestamp_t s = ms / 1000.0L;
     std::time_t t = s;
-    std::size_t fractional_seconds = ms % 1000;
+    // std::size_t fractional_seconds = ms % 1000;
     char mbstr[100];
     std::strftime(mbstr, 100, "%H:%M:%S", std::localtime(&t));
 

fairmq/README.md

@@ -1,9 +1,35 @@
-fairmq
+# FairMQ
-========
 
 The standard FairRoot is running all the different analysis tasks within one process. The FairMQ ([Message Queue](http://en.wikipedia.org/wiki/Message_queue)) allows starting tasks on different processes and provides the communication layer between these processes.
 
-The underlying communication layer in the FairMQ is now provided by:
+## Devices
+
+The components encapsulating the tasks are called **devices** and derive from the common base class `FairMQDevice`.  FairMQ provides ready to use devices to organize the dataflow between the components (without touching the contents of a message), providing functionality like merging and splitting of the data stream (see subdirectory `devices`).
+
+A number of devices to handle the data from the Tutorial3 detector of FairRoot are provided as an example and can be found in `FairRoot/base/MQ` directory. The implementation of the tasks run by these devices can be found `FairRoot/example/Tutorial3`. The implementation includes sending raw binary data as well as serializing the data with either [Boost Serialization](www.boost.org/doc/libs/release/libs/serialization/), [Google Protocol Buffers](https://developers.google.com/protocol-buffers/) or [Root TMessage](http://root.cern.ch/root/html/TMessage.html). Following the examples you can implement your own devices to transport arbitrary data.
+
+## Topology
+
+Devices are arranged into **topologies** where each device has a defined number of data inputs and outputs.
+
+Example of a simple FairMQ topology:
+
+![example of FairMQ topology](../docs/images/fairmq-example-topology.png?raw=true "Example of possible FairMQ topology")
+
+Topology configuration is currently happening via setup scripts. This is very rudimentary and a much more flexible system is now in development. For now, example setup scripts can be found in directory `FairRoot/example/Tutorial3/` along with some additional documentation.
+
+## Messages
+
+Devices transport data between each other in form of `FairMQMessage`s. These can be filled with arbitrary content and transport either raw data or serialized data as described above. Message can be initialized in three different ways:
+ - **with no parameters**: This is usefull for receiving a message, since neither size nor contents are yet known.
+ - **given message size**: Initialize message body with a size and fill the contents later, either with `memcpy` or by writing directly into message memory.
+ - **given message size and buffer**: initialize the message given an existing buffer. This is a zero-copy operation.
+
+After sending the message, the queueing system takes over control over the message body and will free it with `free()` after it is no longer used. A callback can be given to the message object, to be called instead of the destruction with `free()`.
+
+## Transport Interface
+
+The communication layer is available through an interface. Two interface implementations are currently available. Main implementation uses the [ZeroMQ](http://zeromq.org) library. Alternative implementation relies on the [nanomsg](http://nanomsg.org) library. Here is an overview to give an idea how interface is implemented:
+
+![FairMQ transport interface](../docs/images/fairmq-transport-interface.png?raw=true "FairMQ transport interface")
 
-- [ZeroMQ](http://zeromq.org);
-- [NanoMSG](http://nanomsg.org).

fairmq/devices/FairMQBenchmarkSampler.cxx

@@ -66,11 +66,14 @@ void FairMQBenchmarkSampler::Run()
 
     delete base_msg;
 
+    try {
         rateLogger.interrupt();
         resetEventCounter.interrupt();
-
         rateLogger.join();
         resetEventCounter.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }
 
 void FairMQBenchmarkSampler::ResetEventCounter()

fairmq/devices/FairMQBuffer.cxx

@@ -46,8 +46,12 @@ void FairMQBuffer::Run()
         delete msg;
     }
 
+    try {
         rateLogger.interrupt();
         rateLogger.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }
 
 FairMQBuffer::~FairMQBuffer()

fairmq/devices/FairMQMerger.cxx

@@ -61,6 +61,10 @@ void FairMQMerger::Run()
 
     delete poller;
 
+    try {
         rateLogger.interrupt();
         rateLogger.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }

fairmq/devices/FairMQProxy.cxx

@@ -48,6 +48,10 @@ void FairMQProxy::Run()
 
     delete msg;
 
+    try {
         rateLogger.interrupt();
         rateLogger.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }

fairmq/devices/FairMQSink.cxx

@@ -39,8 +39,12 @@ void FairMQSink::Run()
         delete msg;
     }
 
+    try {
         rateLogger.interrupt();
         rateLogger.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }
 
 FairMQSink::~FairMQSink()

fairmq/devices/FairMQSplitter.cxx

@@ -55,6 +55,10 @@ void FairMQSplitter::Run()
         delete msg;
     }
 
+    try {
         rateLogger.interrupt();
         rateLogger.join();
+    } catch(boost::thread_resource_error& e) {
+        LOG(ERROR) << e.what();
+    }
 }

fairmq/nanomsg/FairMQTransportFactoryNN.cxx

@@ -16,7 +16,7 @@
 
 FairMQTransportFactoryNN::FairMQTransportFactoryNN()
 {
-    LOG(INFO) << "Using nanonsg library";
+    LOG(INFO) << "Using nanomsg library";
 }
 
 FairMQMessage* FairMQTransportFactoryNN::CreateMessage()

fairmq/prototest/FairMQBinSink.cxx

@@ -35,8 +35,8 @@ void FairMQBinSink::Run()
         fPayloadInputs->at(0)->Receive(msg);
 
         int inputSize = msg->GetSize();
-        int numInput = inputSize / sizeof(Content);
+        // int numInput = inputSize / sizeof(Content);
-        Content* input = reinterpret_cast<Content*>(msg->GetData());
+        // Content* input = reinterpret_cast<Content*>(msg->GetData());
 
         // for (int i = 0; i < numInput; ++i) {
         //     LOG(INFO) << (&input[i])->x << " " << (&input[i])->y << " " << (&input[i])->z << " " << (&input[i])->a << " " << (&input[i])->b;