Logback demo added

log-mdc-ndc/README.md

@@ -7,7 +7,10 @@ _Log4j MDC_
 * <https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/MDC.html>
 * <http://veerasundar.com/blog/2009/10/log4j-mdc-mapped-diagnostic-context-what-and-why/>
 
-_Log4j2_
+_Log4j2 MDC_
 * <https://logging.apache.org/log4j/2.x/manual/thread-context.html>
 
+_Logback MDC_
+* <http://logback.qos.ch/manual/mdc.html>
+
 

log-mdc-ndc/pom.xml

@@ -34,6 +34,13 @@
             <version>3.3.4</version>
         </dependency>
         
+        <!--logback dependencies-->
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.1.7</version>
+        </dependency>        
+        
 	</dependencies>
 
 </project>

log-mdc-ndc/src/main/java/com/baeldung/mdc/logback/LogbackBusinessService.java

@@ -0,0 +1,17 @@
+package com.baeldung.mdc.logback;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.baeldung.mdc.BusinessService;
+
+public class LogbackBusinessService implements BusinessService {
+
+	private static final Logger logger = LoggerFactory.getLogger(LogbackBusinessService.class);
+
+	@Override
+	public void businessMethod(String transactionId) {
+		logger.info("Executing transaction #{}", transactionId);
+	}
+
+}

log-mdc-ndc/src/main/java/com/baeldung/mdc/logback/LogbackDemo.java

@@ -0,0 +1,17 @@
+package com.baeldung.mdc.logback;
+
+public class LogbackDemo {
+	
+	public static void main(String[] args) throws InterruptedException {
+		LogbackExecutor greeter = new LogbackExecutor();
+		Thread thread1 = new Thread(greeter);
+		Thread thread2 = new Thread(greeter);
+		
+		thread1.start();
+		thread2.start();
+		
+		thread1.join();
+		thread2.join();
+	}
+
+}

log-mdc-ndc/src/main/java/com/baeldung/mdc/logback/LogbackExecutor.java

@@ -0,0 +1,22 @@
+package com.baeldung.mdc.logback;
+
+import org.slf4j.MDC;
+
+import com.baeldung.mdc.TransactionContext;
+
+public class LogbackExecutor implements Runnable {
+
+	public void run() {
+
+		String transactionId = "" + Math.random();
+		String owner = "owner" + Math.random();
+		TransactionContext ctx = new TransactionContext(transactionId, owner);
+
+		MDC.put("transaction.id", transactionId);
+		MDC.put("transaction.owner", owner);
+		MDC.put("transaction.createdAt", ctx.getCreatedAt().toString());
+
+		new LogbackBusinessService().businessMethod(ctx.getTransactionId());
+	}
+
+}

log-mdc-ndc/src/main/resources/logback.xml

@@ -0,0 +1,14 @@
+<configuration>
+
+	# Console appender
+	<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+			<pattern>logback %d{yyyy-MM-dd HH:mm:ss} %p %m %X{transaction.owner} %X{transaction.createdAt} %n</pattern>
+		</encoder>
+	</appender>
+
+	<root level="TRACE">
+		<appender-ref ref="stdout" />
+	</root>
+
+</configuration>