feat: version 1.0

A working publisher and subscriber for ZMQ.

pom.xml

@@ -23,6 +23,22 @@
             <version>2.9.0</version>
         </dependency>
 
+        <!-- https://mvnrepository.com/artifact/org.json/json -->
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20220320</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1</version>
+        </dependency>
+
+
+
 
 
 

src/main/java/Main.java → src/main/java/MainPublisher.java

-import netscape.javascript.JSObject;
-import org.zeromq.SocketType;
-import org.zeromq.ZMQ;
-import org.zeromq.ZContext;
 import zmqpubsub.ZmqPublisher;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 
 import java.util.concurrent.TimeUnit;
 
-public class Main
+public class MainPublisher
 {
     public static void main(String[] args) throws Exception
     {
         String jsonString = "{'test1':'value1','test2':{'id':0,'name':'testName'}}";
         JsonObject jsonObject = (JsonObject) JsonParser.parseString(jsonString);
-        System.out.println(jsonObject);
 
-         ZmqPublisher publisher = new ZmqPublisher("127.0.0.1", "2001");
+        ZmqPublisher publisher = new ZmqPublisher("127.0.0.1", "2001");
         for(int i=0; i<10; i++)
         {
             publisher.publish("allData", jsonObject);
-            System.out.println("published");
+            System.out.println("Sent!");
             TimeUnit.SECONDS.sleep(1);
-
         }
-
     }
 }

src/main/java/mainSubscriber.java

+import com.google.gson.JsonObject;
+import zmqpubsub.ZmqSubscriber;
+
+public class mainSubscriber
+{
+    protected static void handleIncomingData(JsonObject jsonObject)
+    {
+        System.out.println(jsonObject);
+
+        // you can uncomment this if you are working with the included publisher.
+//        System.out.println(jsonObject.get("test2"));
+//        JsonElement test2 = jsonObject.get("test2");
+//        JsonObject jsonObject1 = test2.getAsJsonObject();
+//        System.out.println(jsonObject1.get("id"));
+//        JsonElement id1 = jsonObject1.get("id");
+//        int id1AsInt = id1.getAsInt();
+//        System.out.println(id1AsInt);
+    }
+
+    public static void main(String[] args)
+    {
+//        ZmqSubscriber subscriber = new ZmqSubscriber("127.0.0.1", "2001");
+        ZmqSubscriber subscriber = new ZmqSubscriber("193.190.127.147", "2001"); // To test it with VS8
+        subscriber.subscribe("allData", mainSubscriber::handleIncomingData);
+    }
+
+}

src/main/java/zmqpubsub/ZmqPublisher.java

 package zmqpubsub;
+
 import com.google.gson.JsonObject;
-import netscape.javascript.JSObject;
 import org.zeromq.SocketType;
-import org.zeromq.ZMQ;
 import org.zeromq.ZContext;
+import org.zeromq.ZMQ;
 
 public class ZmqPublisher
 {
@@ -26,7 +26,6 @@ public class ZmqPublisher
 
     public void publish(String topic, JsonObject payload)
     {
-        System.out.println(payload);
         socket.send(topic+":"+payload);
     }
 }

src/main/java/zmqpubsub/ZmqSubscriber.java

+package zmqpubsub;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import org.zeromq.SocketType;
+import org.zeromq.ZContext;
+import org.zeromq.ZMQ;
+
+import java.util.function.Consumer;
+
+public class ZmqSubscriber
+{
+    public ZContext context;
+    public ZMQ.Socket socket;
+    public String bind;
+
+    public ZmqSubscriber(String ip, String port)
+    {
+        context = new ZContext();
+        socket = context.createSocket(SocketType.SUB);
+        bind = "tcp://"+ ip + ":" + port;
+    }
+
+    public void subscribe (String topic, Consumer<JsonObject> consumer)
+    {
+        socket.connect(bind);
+        socket.subscribe(topic);
+        new Thread(() ->
+        {
+            while (true)
+            {
+                byte[] recv = socket.recv();
+                String receivedStringMessage = new String(recv);
+                // s1 contains everything after = in the original string (i.e. =....) therefore +1 to remove the =
+                JsonObject jsonObject = (JsonObject) JsonParser.parseString(receivedStringMessage.substring(receivedStringMessage.indexOf(":") + 1));
+                consumer.accept(jsonObject);
+            }
+        }).start();
+    }
+}