Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

logging-modules/log4j/src/main/java/com/baeldung/log4j/Log4jExample.java

@@ -0,0 +1,17 @@
+package com.baeldung.log4j;
+
+
+import org.apache.log4j.Logger;
+
+public class Log4jExample {
+
+    private final static Logger logger = Logger.getLogger(Log4jExample.class);
+
+    public static void main(String[] args) {
+        logger.trace("Trace log message");
+        logger.debug("Debug log message");
+        logger.info("Info log message");
+        logger.error("Error log message");
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/log4j/Log4jRollingExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.log4j;
+
+import java.util.stream.IntStream;
+
+import org.apache.log4j.Logger;
+
+public class Log4jRollingExample {
+
+    private final static Logger logger = Logger.getLogger(Log4jRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the " + i + " time I say 'Hello World'.");
+            Thread.sleep(100);
+        }
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/log4j2/Log4j2Example.java

@@ -0,0 +1,16 @@
+package com.baeldung.log4j2;
+
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+
+public class Log4j2Example {
+
+    private static final Logger logger = LogManager.getLogger(Log4j2Example.class);
+
+    public static void main(String[] args) {
+        logger.debug("Debug log message");
+        logger.info("Info log message");
+        logger.error("Error log message");
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/log4j2/Log4j2RollingExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.log4j2;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class Log4j2RollingExample {
+
+    private static final Logger logger = LogManager.getLogger(Log4j2RollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+        LogManager.shutdown();
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/logback/LogbackExample.java

@@ -0,0 +1,16 @@
+package com.baeldung.logback;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class LogbackExample {
+
+    private static final Logger logger = LoggerFactory.getLogger(LogbackExample.class);
+
+    public static void main(String[] args) {
+        logger.debug("Debug log message");
+        logger.info("Info log message");
+        logger.error("Error log message");
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/logback/LogbackRollingExample.java

@@ -0,0 +1,19 @@
+package com.baeldung.logback;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.stream.IntStream;
+
+public class LogbackRollingExample {
+
+    private static final Logger logger = LoggerFactory.getLogger(LogbackRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/slf4j/SLF4JLogExceptions.java

@@ -0,0 +1,16 @@
+package com.baeldung.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SLF4JLogExceptions {
+
+    public static void main(String[] args) {
+        Logger logger = LoggerFactory.getLogger(SLF4JLogExceptions.class);
+
+        logger.error("An exception occurred!");
+        logger.error("An exception occurred!", new Exception("Custom exception"));
+        logger.error("{}, {}! An exception occurred!", "Hello", "World", new Exception("Custom exception"));
+    }
+
+}

logging-modules/log4j/src/main/java/com/baeldung/slf4j/Slf4jExample.java

@@ -0,0 +1,20 @@
+package com.baeldung.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * To switch between logging frameworks you need only to uncomment needed framework dependencies in pom.xml
+ */
+public class Slf4jExample {
+    private static Logger logger = LoggerFactory.getLogger(Slf4jExample.class);
+
+    public static void main(String[] args) {
+        logger.debug("Debug log message");
+        logger.info("Info log message");
+        logger.error("Error log message");
+
+        String variable = "Hello John";
+        logger.debug("Printing variable value {} ", variable);
+    }
+}

logging-modules/log4j/src/main/java/com/baeldung/slf4j/Slf4jRollingExample.java

@@ -0,0 +1,19 @@
+package com.baeldung.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.stream.IntStream;
+
+public class Slf4jRollingExample {
+
+    private static Logger logger = LoggerFactory.getLogger(Slf4jRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+    }
+
+}