checking request/reply in zmq

doc/todo.txt

+
+- Add Async Rest client on top on ZMQ:
+  Using 2 channels push and pull . client send on push and in another thread waits on pull
+  the server receives the msg with the source(client pull channel) address to reply to,
+  checks in the hash for already connected and uses this channel to send a reply.
+  we can use zmqpp::socket::send_more to send source address and then the actual msg
\ No newline at end of file

test/Microservice_ZMQTest.cpp

@@ -9,9 +9,27 @@
 #include <common/Microservice_MsgQContext.h>
 #include <thread>
 
-static const char *const IPC_FILE = "/tmp/service-name.ipc";
+static const char *const IPC_FILE1 = "/tmp/service-name1.ipc";
+static const char *const IPC_FILE2 = "/tmp/service-name2.ipc";
 
 
+static const int ITERATIONS = 1000000;
+
+
+template<typename TimeT = std::chrono::milliseconds>
+struct measure
+{
+    template<typename F, typename ...Args>
+    static typename TimeT::rep execution(F&& func, Args&&... args)
+    {
+        auto start = std::chrono::steady_clock::now();
+        std::forward<decltype(func)>(func)(std::forward<Args>(args)...);
+        auto duration = std::chrono::duration_cast< TimeT>
+                (std::chrono::steady_clock::now() - start);
+        return duration.count();
+    }
+};
+
 void test_msgQ();
 
 
@@ -37,7 +55,7 @@ void test_Cereal()
 }
 void test_MsgQueue(zmqpp::context* p_context)
 {
-    const char* ipcfile = IPC_FILE;
+    const char* ipcfile = IPC_FILE1;
     std::fopen(ipcfile, "a");
 
     //zmqpp::context context;
@@ -71,9 +89,87 @@ void test_MsgQueue(zmqpp::context* p_context)
     }
 }
 
-void testClient()
+void testRequestResponse(zmqpp::context &context)
 {
+    const char* ipcFile1 = IPC_FILE1;
+    std::fopen(ipcFile1, "a");
+    const char* ipcFile2 = IPC_FILE2;
+    std::fopen(ipcFile2, "a");
 
+    //zmqpp::context context;
+
+    // create and bind a serverReceive socket
+    std::string ipcAddress1 = std::string("ipc://").append(ipcFile1);
+    std::string ipcAddress2 = std::string("ipc://").append(ipcFile2);
+    zmqpp::socket clientSend (context, zmqpp::socket_type::push);
+    zmqpp::socket serverReceive (context, zmqpp::socket_type::pull);
+    zmqpp::socket clientReceive (context, zmqpp::socket_type::pull);
+    zmqpp::socket serverReply (context, zmqpp::socket_type::push);
+
+    clientSend.connect(ipcAddress1);
+    clientReceive.bind(ipcAddress2);
+    serverReceive.bind(ipcAddress1);
+    serverReply.connect(ipcAddress2);
+
+    int maxSize = 10000;
+    serverReceive.set(zmqpp::socket_option::receive_high_water_mark,maxSize);
+    serverReply.set(zmqpp::socket_option::send_high_water_mark,maxSize);
+    clientReceive.set(zmqpp::socket_option::receive_high_water_mark,maxSize);
+    clientSend.set(zmqpp::socket_option::send_high_water_mark,maxSize);
+
+    auto p_serverThread = new std::thread(std::bind([&serverReceive,&serverReply](){
+        bool keepRunning = true;
+
+        while(keepRunning) {
+            zmqpp::message response;
+            serverReceive.receive(response);
+            auto msg = response.get(0);
+            //std::cout << "Server Received Msg: " << msg << std::endl;
+            if (msg.compare("exit") == 0) {
+                keepRunning = false;
+                serverReply.send(msg,zmqpp::socket::dont_wait);
+            } else if (response.parts() == 2){
+                msg = response.get(1);
+              //  std::cout << "Server Received Second Msg: " << msg << std::endl;
+                serverReply.send(msg,zmqpp::socket::dont_wait);
+            }
+
+        }
+//        std::cout << "Server exit.." << std::endl;
+    }));
+
+    auto p_clientReceiveThread_ = new std::thread(std::bind([&clientReceive](){
+        bool keepRunning = true;
+        int lastNumber;
+
+        while(keepRunning) {
+            zmqpp::message response;
+            clientReceive.receive(response);
+            auto msg = response.get(0);
+            //std::cout << "Client Received Msg: " << msg << std::endl;
+            if (msg.compare("exit") == 0)
+                keepRunning = false;
+            else
+                lastNumber = std::atoi(msg.c_str());
+        }
+        //std::cout << "Client exit.." << std::endl;
+    }));
+
+//
+    // Send a single message from serverReceive to clientSend
+    for (int i = 0; i < ITERATIONS; i++){
+        clientSend.send(std::string("source"),zmqpp::socket::dont_wait | zmqpp::socket::send_more);
+        clientSend.send(std::to_string(i),zmqpp::socket::dont_wait);
+    }
+    zmqpp::message request;
+    request << "exit";
+    clientSend.send(request);
+
+
+    p_serverThread->join();
+    std::cout << "Server exited" << std::endl;
+    p_clientReceiveThread_->join();
+    std::cout << "Client exited" << std::endl;
 }
 
 void test_msgQ(zmqpp::context &context) {
@@ -91,7 +187,7 @@ void test_msgQ(zmqpp::context &context) {
 
 void test_pubsub(zmqpp::context &context) {
 
-    std::string ipcAddress = std::string("ipc://").append(IPC_FILE);
+    std::string ipcAddress = std::string("ipc://").append(IPC_FILE1);
     zmqpp::socket pub(context, zmqpp::socket_type::pub);
     pub.bind(ipcAddress);
     zmqpp::socket sub2(context, zmqpp::socket_type::sub);
@@ -143,10 +239,11 @@ void test_pubsub(zmqpp::context &context) {
 int main(int argc, char *argv[]) {
 
     zmqpp::context context;
-
+    std::cout << "testing of " << ITERATIONS << " iterations took: " << measure<>::execution(testRequestResponse,context) << " msec" << std::endl;
+    //testRequestResponse(context);
     //test_pubsub(context);
     //test_Cereal();
-    test_msgQ(context);
+    //test_msgQ(context);
 
     getchar();