ZMQ receives acting like assembler

zmq-receiver/src/SimulatedZmqReceiver.cpp

@@ -0,0 +1,51 @@
+//
+//  Weather update client in C++
+//  Connects SUB socket to tcp://localhost:5556
+//  Collects weather updates and finds avg temp in zipcode
+//
+
+#include <zmq.hpp>
+#include <iostream>
+#include <sstream>
+
+int main (int argc, char *argv[]){
+    if (argc != 2) {
+        std::cout << "\nERROR\nUsage: jf_buffer_writer [zmq_port]\n";
+        exit(-1);
+    }
+
+    int zmq_port = atoi(argv[1]);
+    std::string addr("tcp://localhost:" + std::to_string(zmq_port));
+    
+    zmq::context_t context (1);
+
+    //  Socket to talk to server
+    std::cout << "Subscribing to server...\n" << std::endl;
+    zmq::socket_t subscriber (context, ZMQ_SUB);
+    subscriber.connect(addr.c_str());
+
+    //  Subscribe to IMAGEDATA
+	const char *filter = "IMAGEDATA";
+    subscriber.setsockopt(ZMQ_SUBSCRIBE, filter, strlen (filter));
+
+    //  Process 100 updates
+    int num_img = 0;
+    long total_temp = 0;
+    zmq::message_t msg_topic;
+    zmq::message_t msg_meta;
+    zmq::message_t msg_image;
+    std::cout << "I'm listening...\n" << std::endl;
+    for (int idx = 0; idx < 100000; idx++) {
+        subscriber.recv(&msg_topic);
+        if(msg_topic.size()==strlen(filter)){
+            subscriber.recv(&msg_meta);
+            subscriber.recv(&msg_image);
+            num_img++;
+        }
+
+        if(idx%500==0){ 
+            std::cout << "Received " << idx << " (at size " << msg_image.size() << " )\t Received: " << num_img << std::endl;
+        }
+    }
+    return 0;
+}