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// Weather update client
// Connects SUB socket to tcp://localhost:5556
// Collects weather updates and finds avg temp in zipcode
#include <zmq.h>
#include <assert.h>
#include <time.h>
#include <string.h>
#define STR(symbol) #symbol
#define STRINGIFY(symbol) STR(symbol)
#ifndef PUBLISHER_PORT
#error PUBLISHER_PORT macro undefined
#endif
int main (int argc, char *argv [])
{
// Socket to talk to server
printf ("Collecting updates from weather server...\n");
void *context = zmq_ctx_new ();
void *subscriber = zmq_socket (context, ZMQ_SUB);
int rc = zmq_connect (subscriber, "tcp://localhost:"STRINGIFY(PUBLISHER_PORT));
assert (rc == 0);
// Subscribe to zipcode, default is NYC, 10001
// Subscribe to zipcode, default is NYC, 10001
const char *filter = "Hello";
rc = zmq_setsockopt (subscriber, ZMQ_SUBSCRIBE,
filter, strlen(filter));
assert (rc == 0);
// Process 100 updates
int update_nbr;
char buffer[10];
for (update_nbr = 0; update_nbr < 100; update_nbr++) {
zmq_recv (subscriber, buffer, 10, 0);
printf("Received!");
}
zmq_close (subscriber);
zmq_ctx_destroy (context);
return 0;
}
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