Sharing context between mql programs in the same Terminal; add new examples

2017-05-26 13:02:23 +08:00
parent 1450c16b36
commit 29b5b9e36e
10 changed files with 225 additions and 15 deletions
@@ -15,12 +15,12 @@
 //+------------------------------------------------------------------+
 void OnStart()
  {
-   Context context;
+   Context context("helloworld");
   Socket socket(context,ZMQ_REP);

   socket.bind("tcp://*:5555");

-   while(true)
+   while(!IsStopped())
     {
      ZmqMsg request;

@@ -0,0 +1,19 @@
+//+------------------------------------------------------------------+
+//|                                         VersionReporting.mq4.mq4 |
+//|                                          Copyright 2016, Li Ding |
+//|                                            dingmaotu@hotmail.com |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2016, Li Ding"
+#property link      "dingmaotu@hotmail.com"
+#property version   "1.00"
+#property strict
+
+#include <Zmq/Zmq.mqh>
+//+------------------------------------------------------------------+
+//| Report 0MQ version                                               |
+//+------------------------------------------------------------------+
+void OnStart()
+  {
+   Print(Zmq::getVersion());
+  }
+//+------------------------------------------------------------------+
@@ -0,0 +1,54 @@
+//+------------------------------------------------------------------+
+//|                                      WeatherUpdateServer.mq4.mq4 |
+//|                                          Copyright 2016, Li Ding |
+//|                                            dingmaotu@hotmail.com |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2016, Li Ding"
+#property link      "dingmaotu@hotmail.com"
+#property version   "1.00"
+#property strict
+
+#include <Zmq/Zmq.mqh>
+
+#define within(num) (int) ((float) num * MathRand() / (32767 + 1.0))
+//+------------------------------------------------------------------+
+//| Weather update server in MQL                                     |
+//| Binds PUB socket to tcp://*:5556                                 |
+//| Publishes random weather updates                                 |
+//+------------------------------------------------------------------+
+void OnStart()
+  {
+//--- Prepare our context and publisher
+   Context context;
+   Socket publisher(context,ZMQ_PUB);
+   publisher.bind("tcp://*:5556");
+
+   long messages_sent=0;
+//--- Initialize random number generator
+   MathSrand(GetTickCount());
+   while(!IsStopped())
+     {
+      int zipcode,temperature,relhumidity;
+
+      // Get values that will fool the boss
+
+      // MetaTrader Note:
+      // if RAND_MAX < 100000, which is the case for MetaTrader, 
+      // you may never get the required value
+      // So 30000 might be a good alternative
+      zipcode=within(30000);
+      temperature=within(215) - 80;
+      relhumidity=within(50) + 10;
+
+      // Send message to all subscribers
+      ZmqMsg message(StringFormat("%05d %d %d",zipcode,temperature,relhumidity));
+      publisher.send(message);
+      messages_sent++;
+
+      if(messages_sent%1000000==0)
+        {
+         PrintFormat("Sent %dM messages now.",messages_sent/1000000);
+        }
+     }
+  }
+//+------------------------------------------------------------------+