Refactored poll support. Add Chapter 2 examples from the official ZMQ guide.

2017-07-18 16:40:22 +08:00
parent 4645013bb2
commit 01afabc408
7 changed files with 309 additions and 24 deletions
@@ -0,0 +1,63 @@
+//+------------------------------------------------------------------+
+//|                                                     RRBroker.mq4 |
+//|                                          Copyright 2017, Li Ding |
+//|                                                dingmaotu@126.com |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2017, Li Ding"
+#property link      "dingmaotu@126.com"
+#property version   "1.00"
+#property strict
+#include <Zmq/Zmq.mqh>
+//+------------------------------------------------------------------+
+//| Simple request-reply broker in MQL (adapted from C++ version)    |
+//|                                                                  |
+//| Olivier Chamoux <olivier.chamoux@fr.thalesgroup.com>             |
+//+------------------------------------------------------------------+
+void OnStart()
+  {
+//  Prepare our context and sockets
+   Context context;
+   Socket frontend(context,ZMQ_ROUTER);
+   Socket backend(context,ZMQ_DEALER);
+
+   frontend.bind("tcp://*:5559");
+   backend.bind("tcp://*:5560");
+
+//  Initialize poll set
+   PollItem items[2];
+   frontend.fillPollItem(items[0],ZMQ_POLLIN);
+   backend.fillPollItem(items[1],ZMQ_POLLIN);
+
+//  Switch messages between sockets
+   while(!IsStopped())
+     {
+      ZmqMsg message;
+      bool more=false;               //  Multipart detection
+
+      Socket::poll(items,500);
+
+      if(items[0].hasInput())
+        {
+         //  Process all parts of the message
+         do
+           {
+            frontend.recv(message);
+            more=message.more();
+            backend.send(message,false,more);
+           }
+         while(more);
+        }
+      if(items[1].hasInput())
+        {
+         //  Process all parts of the message
+         do
+           {
+            backend.recv(message);
+            more=message.more();
+            frontend.send(message,false,more);
+           }
+         while(more);
+        }
+     }
+  }
+//+------------------------------------------------------------------+