Removed redundant interface

log-mdc-ndc/src/main/java/com/baeldung/mdc/IBusinessService.java

@@ -1,9 +0,0 @@
-package com.baeldung.mdc;
-
-public interface IBusinessService {
-
-	/** Sample service transferring a given amount of money. 
-	 * @return {@code true} when the transfer complete successfully, {@code false} otherwise. */
-	boolean transfer(long amount);
-
-}

log-mdc-ndc/src/main/java/com/baeldung/mdc/Transaction.java

@@ -1,18 +1,14 @@
 package com.baeldung.mdc;
 
-import java.util.Date;
-
 public class Transaction {
 
     private String transactionId;
     private String owner;
-	private Date createdAt;
     private Long amount;
 
     public Transaction(String transactionId, String owner, long amount) {
         this.transactionId = transactionId;
         this.owner = owner;
-		this.createdAt = new Date();
         this.amount = amount;
     }
 
@@ -24,10 +20,6 @@ public class Transaction {
         return transactionId;
     }
 
-	public Date getCreatedAt() {
-		return createdAt;
-	}
-	
     public Long getAmount() {
         return amount;
     }

log-mdc-ndc/src/main/java/com/baeldung/mdc/TransferService.java

@@ -3,8 +3,10 @@ package com.baeldung.mdc;
 /**
  * A fake {@link IBusinessService} simulating an actual one.
  */
-public abstract class BusinessService implements IBusinessService {
+public abstract class TransferService {
 
+    /** Sample service transferring a given amount of money. 
+     * @return {@code true} when the transfer complete successfully, {@code false} otherwise. */
     public boolean transfer(long amount) {
         beforeTransfer(amount);
         // exchange messages with a remote system to transfer the money

log-mdc-ndc/src/main/java/com/baeldung/mdc/log4j/Log4JBusinessService.java

@@ -2,9 +2,9 @@ package com.baeldung.mdc.log4j;
 
 import org.apache.log4j.Logger;
 
-import com.baeldung.mdc.BusinessService;
+import com.baeldung.mdc.TransferService;
 
-public class Log4JBusinessService extends BusinessService {
+public class Log4JBusinessService extends TransferService {
 
     private Logger logger = Logger.getLogger(Log4JBusinessService.class);
 

log-mdc-ndc/src/main/java/com/baeldung/mdc/log4j/Log4JRunnable.java

@@ -1,10 +1,8 @@
 package com.baeldung.mdc.log4j;
 
 import org.apache.log4j.MDC;
-import org.apache.logging.log4j.ThreadContext;
 
 import com.baeldung.mdc.Transaction;
-import com.baeldung.mdc.log4j2.Log4J2BusinessService;
 
 public class Log4JRunnable implements Runnable {
 
@@ -19,7 +17,6 @@ public class Log4JRunnable implements Runnable {
 
         MDC.put("transaction.id", tx.getTransactionId());
         MDC.put("transaction.owner", tx.getOwner());
-        MDC.put("transaction.createdAt", tx.getCreatedAt());
 
         log4jBusinessService.transfer(tx.getAmount());
 

log-mdc-ndc/src/main/java/com/baeldung/mdc/log4j2/Log4J2BusinessService.java

@@ -3,9 +3,9 @@ package com.baeldung.mdc.log4j2;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import com.baeldung.mdc.BusinessService;
+import com.baeldung.mdc.TransferService;
 
-public class Log4J2BusinessService extends BusinessService {
+public class Log4J2BusinessService extends TransferService {
 
     private static final Logger logger = LogManager.getLogger();
 

log-mdc-ndc/src/main/java/com/baeldung/mdc/log4j2/Log4J2Runnable.java

@@ -14,10 +14,8 @@ public class Log4J2Runnable implements Runnable {
 
     public void run() {
 
-        ThreadContext.put("transaction.id", tx.getTransactionId());
         ThreadContext.put("transaction.id", tx.getTransactionId());
         ThreadContext.put("transaction.owner", tx.getOwner());
-        ThreadContext.put("transaction.createdAt", tx.getCreatedAt().toString());
 
         log4j2BusinessService.transfer(tx.getAmount());
 

log-mdc-ndc/src/main/java/com/baeldung/mdc/slf4j/Slf4jBusinessService.java

@@ -3,9 +3,9 @@ package com.baeldung.mdc.slf4j;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.baeldung.mdc.BusinessService;
+import com.baeldung.mdc.TransferService;
 
-final class Slf4jBusinessService extends BusinessService {
+final class Slf4jBusinessService extends TransferService {
 
     private static final Logger logger = LoggerFactory.getLogger(Slf4jBusinessService.class);
 

log-mdc-ndc/src/main/java/com/baeldung/mdc/slf4j/Slf4jRunnable.java

@@ -15,7 +15,6 @@ public class Slf4jRunnable implements Runnable {
 
         MDC.put("transaction.id", tx.getTransactionId());
         MDC.put("transaction.owner", tx.getOwner());
-        MDC.put("transaction.createdAt", tx.getCreatedAt().toString());
 
         new Slf4jBusinessService().transfer(tx.getAmount());