preventing multiple executions

src/main/java/zw/qantra/tm/domain/workflows/handlers/IntegrationHandler.java

@@ -31,6 +31,10 @@ public class IntegrationHandler implements HandlerInterface {
     public Object process(Transaction transaction) throws Exception {
         transaction.setType(RequestType.INTEGRATION);
 
+        // if we've done this before then return
+        if(transaction.getIntegrationStatus().equals(Status.SUCCESS))
+            return transaction;
+
         TransactionEvent transactionEvent = TransactionEvent.builder()
                 .transactionId(transaction.getId().toString())
                 .event(transaction.getType().name())

src/main/java/zw/qantra/tm/domain/workflows/handlers/PaymentHandler.java

@@ -33,6 +33,10 @@ public class PaymentHandler implements HandlerInterface {
             transaction.setAuthType(incomingTransaction.getAuthType());
         }
 
+        // if we've done this before then return
+        if(transaction.getPaymentStatus().equals(Status.SUCCESS))
+            return transaction;
+
         transactionService.save(transaction);
 
         TransactionEvent transactionEvent = TransactionEvent.builder()