added poll back

src/main/java/com/billpaymentservice/bbps/util/Helper.java

@@ -1,9 +1,13 @@
 package com.billpaymentservice.bbps.util;
 
+import java.util.function.Function;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
+
+import com.billpaymentservice.bbps.dto.ResponseModel;
 import com.billpaymentservice.bbps.dto.request.MerchantRequestModel;
 import com.billpaymentservice.bbps.entites.BBPSMerchantValidation;
 import com.billpaymentservice.bbps.exception.CustomException;
@@ -11,6 +15,7 @@ import com.billpaymentservice.bbps.repository.MerchantRepository;
 
 
 @Component
+
 public class Helper {
 
 	private static final Logger LOGGER = LoggerFactory.getLogger(Helper.class);
@@ -24,7 +29,42 @@ public class Helper {
 	 * @param requestModel MerchantRequestModel containing merchant details
 	 * @return true if merchant exists and is active
 	 * @throws CustomException if merchant is invalid or inactive
+	 * 
+	 * 
+	 *
 	 */
+	
+	
+	
+	public <T> void startPolling(
+	        T requestObject,                // Request object (any type)
+	        Function<T, ResponseModel> apiCallFunction, // Function to call API
+	        int intervalSeconds,            // gap between two polls
+	        int maxDurationSeconds          // total polling time
+	) {
+	    new Thread(() -> {
+	        try {
+	            int maxAttempts = maxDurationSeconds / intervalSeconds;
+
+	            for (int i = 0; i < maxAttempts; i++) {
+	            	LOGGER.info("⏳ Polling attempt {}...", i + 1);
+
+	                ResponseModel response = apiCallFunction.apply(requestObject);
+	                LOGGER.info("📥 Poll response: {}", response);
+
+	                if ("SUCCESS".equalsIgnoreCase(response.getStatus())) {
+	                	LOGGER.info("✅ Polling successful, stopping early.");
+	                    break;
+	                }
+
+	                Thread.sleep(intervalSeconds * 1000L);
+	            }
+	        } catch (Exception e) {
+	        	LOGGER.error("❌ Error in polling thread: {}", e.getMessage(), e);
+	        }
+	    }).start();
+	}
+	
 	public boolean isMerchantValidAndActive(MerchantRequestModel requestModel) {
 
 		if (requestModel == null || requestModel.getMid() == null) {