@W-19784711: add examples for multiplease send/receive (#196)

Author: sandeepvinayak

examples/src/main/java/com/salesforce/multicloudj/pubsub/Main.java

@@ -25,6 +25,7 @@ public static void main(String[] args) {
         acknowledgeMessagesBatch();
         negativeAcknowledgeMessage();
         getSubscriptionAttributes();
+        sendReceiveMultipleMessages();
     }
 
     /**
@@ -68,7 +69,7 @@ public static void publishMessageWithMetadata() {
     }
 
     /**
-     * Publishes multiple messages for batch operations.
+     * Send and receive multiple messages individually
      */
     public static void publishBatchMessages() {
         // Get the TopicClient instance
@@ -89,6 +90,30 @@ public static void publishBatchMessages() {
         getLogger().info("Published 5 messages for batch acknowledgment");
     }
 
+    /**
+     * Publishes multiple messages for batch operations.
+     */
+    public static void sendReceiveMultipleMessages() {
+        // Get the TopicClient instance
+        TopicClient topicClient = getTopicClient(provider);
+        SubscriptionClient subscriptionClient = getSubscriptionClient(provider);
+
+        // Publish 5 messages for batch acknowledgment
+        for (int i = 1; i <= 5; i++) {
+            Message message = Message.builder()
+                    .withBody("Batch message #" + i)
+                    .withMetadata("batchId", "batch-1")
+                    .withMetadata("messageNumber", String.valueOf(i))
+                    .build();
+
+            topicClient.send(message);
+            Message m = subscriptionClient.receive();
+            getLogger().info("Received message #{}", m.getAckID());
+        }
+
+        getLogger().info("Published 5 messages for batch acknowledgment");
+    }
+
     /**
      * Receives a message from a subscription.
      */