Added missing Docker files to facilitate a basic docker-compose setup.

Simplified Ruby code.

docker-compose.yml

@@ -0,0 +1,12 @@
+frontend-js:
+  build: ./frontend-js
+  ports:
+     - "8080:8080"
+news-server-groovy:
+  build: ./news-server-groovy
+news-server-java:
+  build: ./news-server-java
+news-server-js:
+  build: ./news-server-js
+news-server-rb:
+  build: ./news-server-rb

frontend-js/Dockerfile

@@ -13,4 +13,4 @@ COPY target/$VERTICLE_FILE $VERTICLE_HOME/
 # Launch the verticle
 WORKDIR $VERTICLE_HOME
 ENTRYPOINT ["sh", "-c"]
-CMD ["java -jar $VERTICLE_FILE -cluster"]
+CMD ["java -jar $VERTICLE_FILE -ha"]

frontend-js/pom.xml

@@ -49,6 +49,7 @@
                     <images>
                         <image>
                             <name>${docker.namespace}/${project.artifactId}:${project.version}</name>
+                            <alias>${project.artifactId}</alias>
                             <build>
                                 <from>java:8</from>
                                 <tags>

news-server-java/Dockerfile

@@ -13,4 +13,4 @@ COPY target/$VERTICLE_FILE $VERTICLE_HOME/
 # Launch the verticle
 WORKDIR $VERTICLE_HOME
 ENTRYPOINT ["sh", "-c"]
-CMD ["java -jar $VERTICLE_FILE -cluster"]
+CMD ["java -jar $VERTICLE_FILE -ha"]

news-server-java/src/main/java/app/NewsServer.java

@@ -15,6 +15,7 @@ public static void main(String... args) {
     public void start(Future<Void> fut) {
         EventBus eb = vertx.eventBus();
         // Send a message every second
-        vertx.setPeriodic(1000, v -> eb.publish("news-feed", "Some news about JAVA!"));
+        System.out.println("Ready to send news from JAVA!");
+        vertx.setPeriodic(1000, v -> eb.publish("news-feed", "Some news from JAVA!"));
     }
 }

news-server-js/Dockerfile

@@ -0,0 +1,16 @@
+FROM java:8
+
+ENV VERTICLE_FILE news-server-js-1.0-SNAPSHOT-fat.jar
+
+# Set the location of the verticles
+ENV VERTICLE_HOME /usr/verticles
+
+#EXPOSE 8080
+
+# Copy your fat jar to the container
+COPY target/$VERTICLE_FILE $VERTICLE_HOME/
+
+# Launch the verticle
+WORKDIR $VERTICLE_HOME
+ENTRYPOINT ["sh", "-c"]
+CMD ["java -jar $VERTICLE_FILE -ha"]

news-server-rb/Dockerfile

@@ -0,0 +1,16 @@
+FROM java:8
+
+ENV VERTICLE_FILE news-server-rb-1.0-SNAPSHOT-fat.jar
+
+# Set the location of the verticles
+ENV VERTICLE_HOME /usr/verticles
+
+#EXPOSE 8080
+
+# Copy your fat jar to the container
+COPY target/$VERTICLE_FILE $VERTICLE_HOME/
+
+# Launch the verticle
+WORKDIR $VERTICLE_HOME
+ENTRYPOINT ["sh", "-c"]
+CMD ["java -jar $VERTICLE_FILE -ha"]

news-server-rb/src/main/rb/app/news_server.rb

@@ -1,18 +1,8 @@
-require 'vertx/vertx'
-options = {
-    'haEnabled' => true
-}
-Vertx::Vertx.clustered_vertx(options) { |res_err,res|
-  if (res_err == nil)
-    vertx = res
-    eventBus = vertx.event_bus()
-    puts "Ready to send news from Ruby!"
+require "vertx/vertx"
+include Vertx
 
-    # Send a message every second
-    vertx.set_periodic(1000) { |v|
-      eventBus.publish("news-feed", "Some news from Ruby!")
-    }
-  else
-    puts "Failed: #{res_err}"
-  end
-}
+puts("Ready to send news from Ruby!")
+$vertx::set_periodic(1000) do
+  eventBus = $vertx.event_bus()
+  eventBus.publish("news-feed", "News from Ruby!")
+end

pom.xml

@@ -114,6 +114,7 @@
                         <images>
                             <image>
                                 <name>${docker.namespace}/${project.artifactId}:${project.version}</name>
+                                <alias>${project.artifactId}</alias>
                                 <build>
                                     <from>java:8</from>
                                     <tags>