Added log4j project

log4j/pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>log4j</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <dependencies>
+        <!--log4j dependencies-->
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>1.2.17</version>
+        </dependency>
+
+
+        <!--log4j2 dependencies-->
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>2.6</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.6</version>
+        </dependency>
+
+		<!--disruptor for log4j2 async logging-->
+        <dependency>
+            <groupId>com.lmax</groupId>
+            <artifactId>disruptor</artifactId>
+            <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>
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.3</version>
+                <configuration>
+                    <debug>true</debug>
+                    <optimize>true</optimize>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>UTF-8</encoding>
+                    <showDeprecation>true</showDeprecation>
+                    <showWarnings>true</showWarnings>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

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");
+    }
+
+}

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");
+    }
+
+}

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");
+    }
+
+}

log4j/src/main/resources/log4j.xml

@@ -0,0 +1,31 @@
+<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
+<log4j:configuration debug="false">
+
+    <!--Console appender-->
+    <appender name="stdout" class="org.apache.log4j.ConsoleAppender">
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %p %m%n" />
+        </layout>
+    </appender>
+
+    <!-- File appender-->
+    <appender name="fout" class="org.apache.log4j.FileAppender">
+        <param name="file" value="baeldung.log" />
+        <param name="append" value="false" />
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %p %m%n" />
+        </layout>
+    </appender>
+
+    <!--Override log level for specified package-->
+    <category name="com.baeldung.log4j">
+        <priority value="TRACE" />
+    </category>
+
+    <root>
+        <level value="DEBUG" />
+        <appender-ref ref="stdout" />
+        <appender-ref ref="fout" />
+    </root>
+
+</log4j:configuration>

log4j/src/main/resources/log4j2.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        # Console appender
+        <Console name="stdout" target="SYSTEM_OUT">
+            # Pattern of log message for console appender
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %m%n" />
+        </Console>
+
+        # File appender
+        <File name="fout" fileName="baeldung.log" immediateFlush="false" append="false">
+            # Pattern of log message for file appender
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %m%n"/>
+        </File>
+    </Appenders>
+
+    <Loggers>
+        # Override log level for specified package
+        <Logger name="com.baeldung.log4j2" level="TRACE"/>
+
+        <AsyncRoot level="DEBUG">
+            <AppenderRef ref="stdout" />
+            <AppenderRef ref="fout"/>
+        </AsyncRoot>
+    </Loggers>
+</Configuration>

log4j/src/main/resources/logback.xml

@@ -0,0 +1,28 @@
+<configuration>
+  # Console appender
+  <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
+    <layout class="ch.qos.logback.classic.PatternLayout">
+      # Pattern of log message for console appender
+      <Pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</Pattern>
+    </layout>
+  </appender>
+
+  # File appender
+  <appender name="fout" class="ch.qos.logback.core.FileAppender">
+    # Name of a log file
+    <file>baeldung.log</file>
+    <append>false</append>
+    <encoder>
+      # Pattern of log message for file appender
+      <pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</pattern>
+    </encoder>
+  </appender>
+
+  # Override log level for specified package
+  <logger name="com.baeldung.logback" level="TRACE"/>
+
+  <root level="DEBUG">
+    <appender-ref ref="stdout" />
+    <appender-ref ref="fout" />
+  </root>
+</configuration>

pom.xml

@@ -32,6 +32,7 @@
         <!-- <module>raml</module> -->
         <module>rest-testing</module>
         <module>resteasy</module>
+		<module>log4j</module>
 
         <module>spring-all</module>
         <module>spring-apache-camel</module>