Separate into files, prepare for Prometheus&Grafana

SymphonyManager/src/main/java/io/github/lumijiez/BrokerConnector.java

@@ -0,0 +1,53 @@
+package io.github.lumijiez;
+
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+import com.rabbitmq.client.ConnectionFactory;
+import com.rabbitmq.client.DeliverCallback;
+
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+public class BrokerConnector {
+    private static final String QUEUE_NAME = "random_json_queue";
+    private static final String RABBITMQ_HOST = "rabbitmq";
+    private static final String RABBITMQ_USER = "symphony";
+    private static final String RABBITMQ_PASSWORD = "symphony";
+
+    public static void connect() {
+        ScheduledExecutorService reconnectExecutor = Executors.newSingleThreadScheduledExecutor();
+
+        reconnectExecutor.scheduleWithFixedDelay(() -> {
+            try {
+                connectToRabbitMQ();
+            } catch (Exception e) {
+                System.err.println("Awaiting broker connection: " + e.getMessage());
+            }
+        }, 0, 5, TimeUnit.SECONDS);
+    }
+
+    private static void connectToRabbitMQ() throws Exception {
+        ConnectionFactory factory = new ConnectionFactory();
+        factory.setHost(RABBITMQ_HOST);
+        factory.setUsername(RABBITMQ_USER);
+        factory.setPassword(RABBITMQ_PASSWORD);
+
+        try (Connection connection = factory.newConnection();
+             Channel channel = connection.createChannel()) {
+
+            channel.queueDeclare(QUEUE_NAME, false, false, false, null);
+            System.out.println("Waiting for messages. To exit press CTRL+C");
+
+            DeliverCallback deliverCallback = (consumerTag, delivery) -> {
+                String message = new String(delivery.getBody(), StandardCharsets.UTF_8);
+                System.out.println("Received: " + message);
+            };
+
+            channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> {});
+
+            Thread.currentThread().join();
+        }
+    }
+}