initial commit

natsio/publisher/Dockerfile

@@ -0,0 +1,11 @@
+FROM eclipse-temurin:21-jdk
+
+WORKDIR /app
+
+ADD https://repo1.maven.org/maven2/io/nats/jnats/2.16.14/jnats-2.16.14.jar nats.jar
+
+COPY Publisher.java .
+
+RUN javac -cp nats.jar Publisher.java
+
+CMD ["java", "-cp", ".:nats.jar", "Publisher"]

natsio/publisher/Publisher.java

@@ -0,0 +1,22 @@
+import io.nats.client.Connection;
+import io.nats.client.Nats;
+import java.time.Duration;
+
+public class Publisher {
+  public static void main(String[] args) throws Exception {
+    Connection nc = Nats.connect("nats://nats:4222");
+
+    int counter = 0;
+
+    while (true) {
+      long sendTime = System.currentTimeMillis();
+      String msg = counter + "," + sendTime;
+      nc.publish("demo.subject", msg.getBytes());
+      nc.flush(Duration.ofSeconds(1));
+
+      System.out.println("Sent: " + counter);
+      counter++;
+      Thread.sleep(1000);
+    }
+  }
+}