FairMQ: Extend Multipart and messaging API

- Extend the multipart API to allow sending vectors of messages or helper
   thin wrapper FairMQParts. See example in examples/MQ/8-multipart.
 - NewMessage() can be used in devices instead of
   fTransportFactory->CreateMessage().
   Possible arguments remain unchanged (no args, size or data+size).
 - Send()/Receive() methods can be used in devices instead of
   fChannels.at("chan").at(i).Send()/Receive():
   Send(msg, "chan", i = 0), Receive(msg, "chan", i = 0).
 - Use the new methods in MQ examples and tests.
 - No breaking changes, but FAIRMQ_INTERFACE_VERSION is incremented to 3
   to allow to check for new methods.

examples/MQ/1-sampler-sink/FairMQExample1Sampler.cxx

@@ -39,11 +39,11 @@ void FairMQExample1Sampler::Run()
 
         string* text = new string(fText);
 
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+        unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
         LOG(INFO) << "Sending \"" << fText << "\"";
 
-        fChannels.at("data-out").at(0).Send(msg);
+        Send(msg, "data");
     }
 }
 

examples/MQ/1-sampler-sink/FairMQExample1Sink.cxx

@@ -25,9 +25,9 @@ void FairMQExample1Sink::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> msg(NewMessage());
 
-        if (fChannels.at("data-in").at(0).Receive(msg) >= 0)
+        if (Receive(msg, "data") >= 0)
         {
             LOG(INFO) << "Received message: \""
                       << string(static_cast<char*>(msg->GetData()), msg->GetSize())

examples/MQ/1-sampler-sink/ex1-sampler-sink.json

@@ -6,7 +6,7 @@
             "id": "sampler1",
             "channel":
             {
-                "name": "data-out",
+                "name": "data",
                 "socket":
                 {
                     "type": "push",
@@ -24,7 +24,7 @@
             "id": "sink1",
             "channel":
             {
-                "name": "data-in",
+                "name": "data",
                 "socket":
                 {
                     "type": "pull",

examples/MQ/2-sampler-processor-sink/FairMQExample2Processor.cxx

@@ -36,11 +36,11 @@ void FairMQExample2Processor::Run()
     while (CheckCurrentState(RUNNING))
     {
         // Create empty message to hold the input
-        unique_ptr<FairMQMessage> input(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> input(NewMessage());
 
         // Receive the message (blocks until received or interrupted (e.g. by state change)). 
         // Returns size of the received message or -1 if interrupted.
-        if (fChannels.at("data-in").at(0).Receive(input) >= 0)
+        if (Receive(input, "data1") >= 0)
         {
             LOG(INFO) << "Received data, processing...";
 
@@ -49,10 +49,10 @@ void FairMQExample2Processor::Run()
             *text += " (modified by " + fId + ")";
 
             // Create output message
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+            unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
             // Send out the output message
-            fChannels.at("data-out").at(0).Send(msg);
+            Send(msg, "data2");
         }
     }
 }

examples/MQ/2-sampler-processor-sink/FairMQExample2Sampler.cxx

@@ -39,11 +39,11 @@ void FairMQExample2Sampler::Run()
 
         string* text = new string(fText);
 
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+        unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
         LOG(INFO) << "Sending \"" << fText << "\"";
 
-        fChannels.at("data-out").at(0).Send(msg);
+        Send(msg, "data1");
     }
 }
 

examples/MQ/2-sampler-processor-sink/FairMQExample2Sink.cxx

@@ -28,9 +28,9 @@ void FairMQExample2Sink::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> msg(NewMessage());
 
-        if (fChannels.at("data-in").at(0).Receive(msg) >= 0)
+        if (Receive(msg, "data2") >= 0)
         {
             LOG(INFO) << "Received message: \""
                       << string(static_cast<char*>(msg->GetData()), msg->GetSize())

examples/MQ/2-sampler-processor-sink/ex2-sampler-processor-sink.json

@@ -6,7 +6,7 @@
             "id": "sampler1",
             "channel":
             {
-                "name": "data-out",
+                "name": "data1",
                 "socket":
                 {
                     "type": "push",
@@ -24,7 +24,7 @@
             "id": "processor1",
             "channel":
             {
-                "name": "data-in",
+                "name": "data1",
                 "socket":
                 {
                     "type": "pull",
@@ -37,7 +37,7 @@
             },
             "channel":
             {
-                "name": "data-out",
+                "name": "data2",
                 "socket":
                 {
                     "type": "push",
@@ -55,7 +55,7 @@
             "id": "processor2",
             "channel":
             {
-                "name": "data-in",
+                "name": "data1",
                 "socket":
                 {
                     "type": "pull",
@@ -68,7 +68,7 @@
             },
             "channel":
             {
-                "name": "data-out",
+                "name": "data2",
                 "socket":
                 {
                     "type": "push",
@@ -86,7 +86,7 @@
             "id": "sink1",
             "channel":
             {
-                "name": "data-in",
+                "name": "data2",
                 "socket":
                 {
                     "type": "pull",

examples/MQ/3-dds/FairMQExample3Processor.cxx

@@ -34,11 +34,11 @@ void FairMQExample3Processor::Run()
     while (CheckCurrentState(RUNNING))
     {
         // Create empty message to hold the input
-        unique_ptr<FairMQMessage> input(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> input(NewMessage());
 
         // Receive the message (blocks until received or interrupted (e.g. by state change)). 
         // Returns size of the received message or -1 if interrupted.
-        if (fChannels.at("data-in").at(0).Receive(input) >= 0)
+        if (Receive(input, "data1") >= 0)
         {
             LOG(INFO) << "Received data, processing...";
 
@@ -47,10 +47,10 @@ void FairMQExample3Processor::Run()
             *text += " (modified by " + fId + ")";
 
             // Create output message
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+            unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
             // Send out the output message
-            fChannels.at("data-out").at(0).Send(msg);
+            Send(msg, "data2");
         }
     }
 }

examples/MQ/3-dds/FairMQExample3Sampler.cxx

@@ -37,11 +37,11 @@ void FairMQExample3Sampler::Run()
 
         string* text = new string("Data");
 
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+        unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
         LOG(INFO) << "Sending \"Data\"";
 
-        fChannels.at("data-out").at(0).Send(msg);
+        Send(msg, "data1");
     }
 }
 

examples/MQ/3-dds/FairMQExample3Sink.cxx

@@ -28,9 +28,9 @@ void FairMQExample3Sink::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> msg(NewMessage());
 
-        if (fChannels.at("data-in").at(0).Receive(msg) >= 0)
+        if (Receive(msg, "data2") >= 0)
         {
             LOG(INFO) << "Received message: \""
                       << string(static_cast<char*>(msg->GetData()), msg->GetSize())

examples/MQ/3-dds/ex3-dds-hosts.cfg

@@ -3,6 +3,6 @@ echo "DBG: SSH ENV Script"
 #source setup.sh
 @bash_end@
 
-sampler, username@localhost, , /tmp/, 1
+sampler, orybalch@localhost, , /tmp/, 1
-processor, username@localhost, , /tmp/, 10
+processor, orybalch@localhost, , /tmp/, 10
-sink, username@localhost, , /tmp/, 1
+sink, orybalch@localhost, , /tmp/, 1

examples/MQ/3-dds/runExample3Processor.cxx

@@ -55,12 +55,12 @@ int main(int argc, char** argv)
         // configure data output channel
         FairMQChannel dataInChannel("pull", "connect", "");
         dataInChannel.UpdateRateLogging(0);
-        processor.fChannels["data-in"].push_back(dataInChannel);
+        processor.fChannels["data1"].push_back(dataInChannel);
 
         // configure data output channel
         FairMQChannel dataOutChannel("push", "connect", "");
         dataOutChannel.UpdateRateLogging(0);
-        processor.fChannels["data-out"].push_back(dataOutChannel);
+        processor.fChannels["data2"].push_back(dataOutChannel);
 
         // Waiting for DDS properties
         dds::key_value::CKeyValue ddsKeyValue;
@@ -97,8 +97,8 @@ int main(int argc, char** argv)
             }
         }
 
-        processor.fChannels.at("data-in").at(0).UpdateAddress(samplerValues.begin()->second);
+        processor.fChannels.at("data1").at(0).UpdateAddress(samplerValues.begin()->second);
-        processor.fChannels.at("data-out").at(0).UpdateAddress(sinkValues.begin()->second);
+        processor.fChannels.at("data2").at(0).UpdateAddress(sinkValues.begin()->second);
 
         processor.ChangeState("INIT_DEVICE");
         processor.WaitForEndOfState("INIT_DEVICE");

examples/MQ/3-dds/runExample3Sampler.cxx

@@ -64,7 +64,7 @@ int main(int argc, char** argv)
         // configure data output channel
         FairMQChannel dataOutChannel("push", "bind", "");
         dataOutChannel.UpdateRateLogging(0);
-        sampler.fChannels["data-out"].push_back(dataOutChannel);
+        sampler.fChannels["data1"].push_back(dataOutChannel);
 
         // Get the IP of the current host and store it for binding.
         map<string,string> IPs;
@@ -85,7 +85,7 @@ int main(int argc, char** argv)
 
         // Configure the found host IP for the channel.
         // TCP port will be chosen randomly during the initialization (binding).
-        sampler.fChannels.at("data-out").at(0).UpdateAddress(initialOutputAddress);
+        sampler.fChannels.at("data1").at(0).UpdateAddress(initialOutputAddress);
 
         sampler.ChangeState("INIT_DEVICE");
         sampler.WaitForInitialValidation();
@@ -93,7 +93,7 @@ int main(int argc, char** argv)
         // Advertise the bound addresses via DDS property
         LOG(INFO) << "Giving sampler output address to DDS.";
         dds::key_value::CKeyValue ddsKeyValue;
-        ddsKeyValue.putValue("SamplerAddress", sampler.fChannels.at("data-out").at(0).GetAddress());
+        ddsKeyValue.putValue("SamplerAddress", sampler.fChannels.at("data1").at(0).GetAddress());
 
         sampler.WaitForEndOfState("INIT_DEVICE");
 

examples/MQ/3-dds/runExample3Sink.cxx

@@ -64,7 +64,7 @@ int main(int argc, char** argv)
         // configure data output channel
         FairMQChannel dataInChannel("pull", "bind", "");
         dataInChannel.UpdateRateLogging(0);
-        sink.fChannels["data-in"].push_back(dataInChannel);
+        sink.fChannels["data2"].push_back(dataInChannel);
 
         // Get the IP of the current host and store it for binding.
         map<string,string> IPs;
@@ -85,7 +85,7 @@ int main(int argc, char** argv)
 
         // Configure the found host IP for the channel.
         // TCP port will be chosen randomly during the initialization (binding).
-        sink.fChannels.at("data-in").at(0).UpdateAddress(initialInputAddress);
+        sink.fChannels.at("data2").at(0).UpdateAddress(initialInputAddress);
 
         sink.ChangeState("INIT_DEVICE");
         sink.WaitForInitialValidation();
@@ -93,7 +93,7 @@ int main(int argc, char** argv)
         // Advertise the bound address via DDS property
         LOG(INFO) << "Giving sink input address to DDS.";
         dds::key_value::CKeyValue ddsKeyValue;
-        ddsKeyValue.putValue("SinkAddress", sink.fChannels.at("data-in").at(0).GetAddress());
+        ddsKeyValue.putValue("SinkAddress", sink.fChannels.at("data2").at(0).GetAddress());
 
         sink.WaitForEndOfState("INIT_DEVICE");
 

examples/MQ/4-copypush/FairMQExample4Sampler.cxx

@@ -34,23 +34,23 @@ void FairMQExample4Sampler::Run()
 
         uint64_t* number = new uint64_t(counter);
 
-        std::unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(number, sizeof(uint64_t)));
+        std::unique_ptr<FairMQMessage> msg(NewMessage(number, sizeof(uint64_t)));
 
         LOG(INFO) << "Sending \"" << counter << "\"";
 
-        if (fChannels.at("data-out").size() > 1)
+        if (fChannels.at("data").size() > 1)
         {
-            for (int i = 1; i < fChannels.at("data-out").size(); ++i)
+            for (int i = 1; i < fChannels.at("data").size(); ++i)
             {
-                std::unique_ptr<FairMQMessage> msgCopy(fTransportFactory->CreateMessage());
+                std::unique_ptr<FairMQMessage> msgCopy(NewMessage());
                 msgCopy->Copy(msg);
-                fChannels.at("data-out").at(i).Send(msgCopy);
+                Send(msgCopy, "data", i);
             }
-            fChannels.at("data-out").at(0).Send(msg);
+            Send(msg, "data");
         }
         else
         {
-            fChannels.at("data-out").at(0).Send(msg);
+            Send(msg, "data");
         }
 
         ++counter;

examples/MQ/4-copypush/FairMQExample4Sink.cxx

@@ -28,9 +28,9 @@ void FairMQExample4Sink::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        std::unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+        std::unique_ptr<FairMQMessage> msg(NewMessage());
 
-        if (fChannels.at("data-in").at(0).Receive(msg) >= 0)
+        if (Receive(msg, "data") >= 0)
         {
             LOG(INFO) << "Received message: \"" << *(static_cast<int*>(msg->GetData())) << "\"";
         }

examples/MQ/4-copypush/ex4-copypush.json

@@ -6,7 +6,7 @@
             "id": "sampler1",
             "channel":
             {
-                "name": "data-out",
+                "name": "data",
                 "socket":
                 {
                     "type": "push",
@@ -33,7 +33,7 @@
             "id": "sink1",
             "channel":
             {
-                "name": "data-in",
+                "name": "data",
                 "socket":
                 {
                     "type": "pull",
@@ -51,7 +51,7 @@
             "id": "sink2",
             "channel":
             {
-                "name": "data-in",
+                "name": "data",
                 "socket":
                 {
                     "type": "pull",

examples/MQ/5-req-rep/FairMQExample5Client.cxx

@@ -42,14 +42,14 @@ void FairMQExample5Client::Run()
 
         string* text = new string(fText);
 
-        unique_ptr<FairMQMessage> request(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+        unique_ptr<FairMQMessage> request(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
-        unique_ptr<FairMQMessage> reply(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> reply(NewMessage());
 
         LOG(INFO) << "Sending \"" << fText << "\" to server.";
 
-        if (fChannels.at("data").at(0).Send(request) > 0)
+        if (Send(request, "data") > 0)
         {
-            if (fChannels.at("data").at(0).Receive(reply) >= 0)
+            if (Receive(reply, "data") >= 0)
             {
                 LOG(INFO) << "Received reply from server: \"" << string(static_cast<char*>(reply->GetData()), reply->GetSize()) << "\"";
             }

examples/MQ/5-req-rep/FairMQExample5Server.cxx

@@ -33,9 +33,9 @@ void FairMQExample5Server::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        unique_ptr<FairMQMessage> request(fTransportFactory->CreateMessage());
+        unique_ptr<FairMQMessage> request(NewMessage());
 
-        if (fChannels.at("data").at(0).Receive(request) >= 0)
+        if (Receive(request, "data") >= 0)
         {
             LOG(INFO) << "Received request from client: \"" << string(static_cast<char*>(request->GetData()), request->GetSize()) << "\"";
 
@@ -43,9 +43,9 @@ void FairMQExample5Server::Run()
 
             LOG(INFO) << "Sending reply to client.";
 
-            unique_ptr<FairMQMessage> reply(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+            unique_ptr<FairMQMessage> reply(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
-            fChannels.at("data").at(0).Send(reply);
+            Send(reply, "data");
         }
     }
 }

examples/MQ/6-multiple-channels/FairMQExample6Broadcaster.cxx

@@ -38,9 +38,9 @@ void FairMQExample6Broadcaster::Run()
         boost::this_thread::sleep(boost::posix_time::milliseconds(1000));
 
         string* text = new string("OK");
-        unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+        unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
-        LOG(INFO) << "Sending \"" << "OK" << "\"";
+        LOG(INFO) << "Sending OK";
-        fChannels.at("broadcast-out").at(0).Send(msg);
+        Send(msg, "broadcast");
     }
 }
 

examples/MQ/6-multiple-channels/FairMQExample6Sampler.cxx

@@ -34,37 +34,37 @@ void FairMQExample6Sampler::CustomCleanup(void *data, void *object)
 
 void FairMQExample6Sampler::Run()
 {
-    std::unique_ptr<FairMQPoller> poller(fTransportFactory->CreatePoller(fChannels, { "data-out", "broadcast-in" }));
+    std::unique_ptr<FairMQPoller> poller(fTransportFactory->CreatePoller(fChannels, { "data", "broadcast" }));
 
     while (CheckCurrentState(RUNNING))
     {
         poller->Poll(-1);
 
-        if (poller->CheckInput("broadcast-in", 0))
+        if (poller->CheckInput("broadcast", 0))
         {
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+            unique_ptr<FairMQMessage> msg(NewMessage());
 
-            if (fChannels.at("broadcast-in").at(0).Receive(msg) > 0)
+            if (Receive(msg, "broadcast") > 0)
             {
                 LOG(INFO) << "Received broadcast: \""
                           << string(static_cast<char*>(msg->GetData()), msg->GetSize())
                           << "\"";
             }
-        } // if (poller->CheckInput("broadcast-in", 0))
+        }
 
-        if (poller->CheckOutput("data-out", 0))
+        if (poller->CheckOutput("data", 0))
         {
             boost::this_thread::sleep(boost::posix_time::milliseconds(1000));
 
             string* text = new string(fText);
 
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
+            unique_ptr<FairMQMessage> msg(NewMessage(const_cast<char*>(text->c_str()), text->length(), CustomCleanup, text));
 
             LOG(INFO) << "Sending \"" << fText << "\"";
 
-            fChannels.at("data-out").at(0).Send(msg);
+            Send(msg, "data");
-        } // if (poller->CheckOutput("data-out", 0))
+        }
-    } // while (CheckCurrentState(RUNNING))
+    }
 }
 
 FairMQExample6Sampler::~FairMQExample6Sampler()

examples/MQ/6-multiple-channels/FairMQExample6Sink.cxx

@@ -24,33 +24,29 @@ FairMQExample6Sink::FairMQExample6Sink()
 
 void FairMQExample6Sink::Run()
 {
-    std::unique_ptr<FairMQPoller> poller(fTransportFactory->CreatePoller(fChannels, { "data-in", "broadcast-in" }));
+    std::unique_ptr<FairMQPoller> poller(fTransportFactory->CreatePoller(fChannels, { "data", "broadcast" }));
 
     while (CheckCurrentState(RUNNING))
     {
         poller->Poll(-1);
 
-        if (poller->CheckInput("broadcast-in", 0))
+        if (poller->CheckInput("broadcast", 0))
         {
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+            unique_ptr<FairMQMessage> msg(NewMessage());
 
-            if (fChannels.at("broadcast-in").at(0).Receive(msg) > 0)
+            if (Receive(msg, "broadcast") > 0)
             {
-                LOG(INFO) << "Received broadcast: \""
+                LOG(INFO) << "Received broadcast: \"" << string(static_cast<char*>(msg->GetData()), msg->GetSize()) << "\"";
-                          << string(static_cast<char*>(msg->GetData()), msg->GetSize())
-                          << "\"";
             }
         }
 
-        if (poller->CheckInput("data-in", 0))
+        if (poller->CheckInput("data", 0))
         {
-            unique_ptr<FairMQMessage> msg(fTransportFactory->CreateMessage());
+            unique_ptr<FairMQMessage> msg(NewMessage());
 
-            if (fChannels.at("data-in").at(0).Receive(msg) > 0)
+            if (Receive(msg, "data") > 0)
             {
-                LOG(INFO) << "Received message: \""
+                LOG(INFO) << "Received message: \"" << string(static_cast<char*>(msg->GetData()), msg->GetSize()) << "\"";
-                          << string(static_cast<char*>(msg->GetData()), msg->GetSize())
-                          << "\"";
             }
         }
     }

examples/MQ/6-multiple-channels/ex6-multiple-channels.json

@@ -6,7 +6,7 @@
             "id": "sampler1",
             "channel":
             {
-                "name": "data-out",
+                "name": "data",
                 "socket":
                 {
                     "type": "push",
@@ -19,7 +19,7 @@
             },
             "channel":
             {
-                "name": "broadcast-in",
+                "name": "broadcast",
                 "socket":
                 {
                     "type": "sub",
@@ -37,7 +37,7 @@
             "id": "sink1",
             "channel":
             {
-                "name": "data-in",
+                "name": "data",
                 "socket":
                 {
                     "type": "pull",
@@ -50,7 +50,7 @@
             },
             "channel":
             {
-                "name": "broadcast-in",
+                "name": "broadcast",
                 "socket":
                 {
                     "type": "sub",
@@ -68,7 +68,7 @@
             "id": "broadcaster1",
             "channel":
             {
-                "name": "broadcast-out",
+                "name": "broadcast",
                 "socket":
                 {
                     "type": "pub",

examples/MQ/8-multipart/FairMQExample8Sampler.cxx

@@ -39,17 +39,14 @@ void FairMQExample8Sampler::Run()
         // Set stopFlag to 1 for the first 4 messages, and to 0 for the 5th.
         counter < 5 ? header->stopFlag = 0 : header->stopFlag = 1;
 
-        // Create message part with the header.
+        FairMQParts parts;
-        unique_ptr<FairMQMessage> headerPart(fTransportFactory->CreateMessage(header, sizeof(Ex8Header)));
+        parts.AddPart(NewMessage(header, sizeof(Ex8Header)));
-        // Create message part with the body of 1000 bytes size.
+        parts.AddPart(NewMessage(1000));
-        unique_ptr<FairMQMessage> dataPart(fTransportFactory->CreateMessage(1000));
 
         LOG(INFO) << "Sending header with stopFlag: " << header->stopFlag;
+        LOG(INFO) << "Sending body of size: " << parts.At(1).GetSize();
 
-        // Schedule the header part for sending.
+        Send(parts, "data-out");
-        fChannels.at("data-out").at(0).SendPart(headerPart);
-        // Add body part (final part). `Send()` will send/queue all parts.
-        fChannels.at("data-out").at(0).Send(dataPart);
 
         // Go out of the sending loop if the stopFlag was sent.
         if (counter == 5)

examples/MQ/8-multipart/FairMQExample8Sink.cxx

@@ -32,16 +32,14 @@ void FairMQExample8Sink::Run()
 {
     while (CheckCurrentState(RUNNING))
     {
-        unique_ptr<FairMQMessage> headerPart(fTransportFactory->CreateMessage());
+        FairMQParts parts;
-        unique_ptr<FairMQMessage> bodyPart(fTransportFactory->CreateMessage());
 
-        if (fChannels.at("data-in").at(0).Receive(headerPart) >= 0)
+        if (Receive(parts, "data-in") >= 0)
-        {
-            if (fChannels.at("data-in").at(0).Receive(bodyPart) >= 0)
         {
             Ex8Header header;
-                header.stopFlag = (static_cast<Ex8Header*>(headerPart->GetData()))->stopFlag;
+            header.stopFlag = (static_cast<Ex8Header*>(parts.At(0).GetData()))->stopFlag;
             LOG(INFO) << "Received header with stopFlag: " << header.stopFlag;
+            LOG(INFO) << "Received body of size: " << parts.At(1).GetSize();
             if (header.stopFlag == 1)
             {
                 LOG(INFO) << "Flag is 0, exiting Run()";
@@ -49,7 +47,6 @@ void FairMQExample8Sink::Run()
             }
         }
     }
-    }
 }
 
 FairMQExample8Sink::~FairMQExample8Sink()