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-rw-r--r--devices/zmq_queue/zmq_queue.cpp114
1 files changed, 109 insertions, 5 deletions
diff --git a/devices/zmq_queue/zmq_queue.cpp b/devices/zmq_queue/zmq_queue.cpp
index 3bcce97..5eae750 100644
--- a/devices/zmq_queue/zmq_queue.cpp
+++ b/devices/zmq_queue/zmq_queue.cpp
@@ -20,6 +20,113 @@
#include "../../include/zmq.hpp"
#include "../../foreign/xmlParser/xmlParser.cpp"
+class queue
+{
+public:
+
+ queue (zmq::socket_t& reply, zmq::socket_t& request) :
+ xrep (reply),
+ xreq (request)
+ {
+ items [0].socket = reply;
+ items [0].fd = 0;
+ items [0].events = ZMQ_POLLIN;
+ items [0].revents = 0;
+
+ items [1].socket = request;
+ items [1].fd = 0;
+ items [1].events = ZMQ_POLLIN;
+ items [1].revents = 0;
+
+ m_next_request_method = &queue::get_request;
+ m_next_response_method = &queue::get_response;
+ }
+
+ void run()
+ {
+ while (true) {
+ int rc = zmq::poll (&items [0], 2, -1);
+ if (rc < 0)
+ break;
+ next_request();
+ next_response();
+ }
+ }
+
+private:
+
+ void next_request()
+ {
+ (this->*m_next_request_method) ();
+ }
+
+ void next_response()
+ {
+ (this->*m_next_response_method) ();
+ }
+
+ void get_request()
+ {
+ if (items [0].revents & ZMQ_POLLIN ) {
+ int rc = xrep.recv (&request_msg, ZMQ_NOBLOCK);
+ if (!rc)
+ return;
+ items [0].events &= ~ZMQ_POLLIN;
+ items [1].events |= ZMQ_POLLOUT;
+ m_next_request_method = &queue::send_request;
+ }
+ }
+
+ void send_request()
+ {
+ if (items [1].revents & ZMQ_POLLOUT) {
+ int rc = xreq.send (request_msg, ZMQ_NOBLOCK);
+ if (!rc) return;
+ items [1].events &= ~ZMQ_POLLOUT;
+ items [0].events |= ZMQ_POLLIN;
+ m_next_request_method = &queue::get_request;
+ }
+ }
+
+ void get_response()
+ {
+ if ( items [1].revents & ZMQ_POLLIN ) {
+ int rc = xreq.recv (&response_msg, ZMQ_NOBLOCK);
+ if (!rc)
+ return;
+ items [1].events &= ~ZMQ_POLLIN;
+ items [0].events |= ZMQ_POLLOUT;
+ m_next_response_method = &queue::send_response;
+ }
+ }
+
+ void send_response()
+ {
+ if (items [0].revents & ZMQ_POLLOUT) {
+ int rc = xrep.send (response_msg, ZMQ_NOBLOCK);
+ if (!rc)
+ return;
+ items [0].events &= ~ZMQ_POLLOUT;
+ items [1].events |= ZMQ_POLLIN;
+ m_next_response_method = &queue::get_response;
+ }
+ }
+
+ zmq::socket_t & xrep;
+ zmq::socket_t & xreq;
+ zmq_pollitem_t items [2];
+ zmq::message_t request_msg;
+ zmq::message_t response_msg;
+
+ typedef void (queue::*next_method) ();
+
+ next_method m_next_request_method;
+ next_method m_next_response_method;
+
+ queue (queue const &);
+ void operator = (queue const &);
+};
+
int main (int argc, char *argv [])
{
if (argc != 2) {
@@ -112,11 +219,8 @@ int main (int argc, char *argv [])
n++;
}
- zmq::message_t msg;
- while (true) {
- in_socket.recv (&msg);
- out_socket.send (msg);
- }
+ queue q(in_socket, out_socket);
+ q.run();
return 0;
}