Zero MQ implimentation and example (Tutorial3)

git-svn-id: https://subversion.gsi.de/fairroot/fairbase/trunk@20162 0381ead4-6506-0410-b988-94b70fbc4730

fairmq/FairMQStandaloneMerger.cxx

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+/*
+ * FairMQStandaloneMerger.cxx
+ *
+ *  Created on: Dec 6, 2012
+ *      Author: dklein
+ */
+
+#include "FairMQStandaloneMerger.h"
+#include "FairMQLogger.h"
+
+FairMQStandaloneMerger::FairMQStandaloneMerger()
+{
+}
+
+FairMQStandaloneMerger::~FairMQStandaloneMerger()
+{
+}
+
+void FairMQStandaloneMerger::Run()
+{
+  FairMQLogger::GetInstance()->Log(FairMQLogger::INFO, ">>>>>>> Run <<<<<<<");
+
+  Bool_t received0 = false;
+  Bool_t received1 = false;
+  FairMQMessage* msg0 = NULL;
+  FairMQMessage* msg1 = NULL;
+  TString source0 = fPayloadInputs->at(0)->GetId();
+  TString source1 = fPayloadInputs->at(1)->GetId();
+  Int_t size0 = 0;
+  Int_t size1 = 0;
+
+  // Initialize poll set
+  zmq_pollitem_t items[] = {
+    { *(fPayloadInputs->at(0)->GetSocket()), 0, ZMQ_POLLIN, 0 },
+    { *(fPayloadInputs->at(1)->GetSocket()), 0, ZMQ_POLLIN, 0 }
+  };
+
+  void* status; //necessary for pthread_join
+  pthread_t logger;
+  pthread_create(&logger, NULL, &FairMQDevice::callLogSocketRates, this);
+
+  while (true) {
+    msg0 = new FairMQMessage();
+    msg1 = new FairMQMessage();
+
+    zmq_poll(items, 2, -1);
+
+    if (items[0].revents & ZMQ_POLLIN) {
+      received0 = fPayloadInputs->at(0)->Receive(msg0);
+    }
+
+    if (items[1].revents & ZMQ_POLLIN) {
+      received1 = fPayloadInputs->at(1)->Receive(msg1);
+    }
+
+    if (received0) {
+      size0 = msg0->Size();
+      fPayloadOutputs->at(0)->Send(msg0);
+
+      received0 = false;
+    }
+
+    if (received1) {
+      size1 = msg1->Size();
+      fPayloadOutputs->at(0)->Send(msg1);
+
+      received1 = false;
+    }
+
+    delete msg0;
+    delete msg1;
+  }
+
+  pthread_join(logger, &status);
+}
+