From d9240931cf84bd007e1af1e8655d12ded12ca9ae Mon Sep 17 00:00:00 2001
From: oborkovskyi <oborkovskyi@playtika.com>
Date: Thu, 30 Jun 2016 13:03:50 +0300
Subject: [PATCH 1/4] Added log4j project

---
 log4j/pom.xml                                 | 61 +++++++++++++++++++
 .../java/com/baeldung/log4j/Log4jExample.java | 17 ++++++
 log4j/src/main/resources/log4j.xml            | 31 ++++++++++
 log4j/src/main/resources/log4j2.xml           | 26 ++++++++
 log4j/src/main/resources/logback.xml          | 28 +++++++++
 5 files changed, 163 insertions(+)
 create mode 100644 log4j/pom.xml
 create mode 100644 log4j/src/main/java/com/baeldung/log4j/Log4jExample.java
 create mode 100644 log4j/src/main/resources/log4j.xml
 create mode 100644 log4j/src/main/resources/log4j2.xml
 create mode 100644 log4j/src/main/resources/logback.xml

diff --git a/log4j/pom.xml b/log4j/pom.xml
new file mode 100644
index 0000000000..5c73dc848d
--- /dev/null
+++ b/log4j/pom.xml
@@ -0,0 +1,61 @@
+<?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>-->
+
+        <!--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>
\ No newline at end of file
diff --git a/log4j/src/main/java/com/baeldung/log4j/Log4jExample.java b/log4j/src/main/java/com/baeldung/log4j/Log4jExample.java
new file mode 100644
index 0000000000..e53fdd4881
--- /dev/null
+++ b/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");
+    }
+
+}
diff --git a/log4j/src/main/resources/log4j.xml b/log4j/src/main/resources/log4j.xml
new file mode 100644
index 0000000000..1de6c62caf
--- /dev/null
+++ b/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} %-5p %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>
\ No newline at end of file
diff --git a/log4j/src/main/resources/log4j2.xml b/log4j/src/main/resources/log4j2.xml
new file mode 100644
index 0000000000..0a854b25b7
--- /dev/null
+++ b/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} %-5p %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} %-5p %m%n"/>
+        </File>
+    </Appenders>
+
+    <Loggers>
+        # Override log level for specified package
+        <Logger name="com.baeldung.log4j" level="TRACE"/>
+
+        <Root level="DEBUG">
+            <AppenderRef ref="stdout" />
+            <AppenderRef ref="fout"/>
+        </Root>
+    </Loggers>
+</Configuration>
\ No newline at end of file
diff --git a/log4j/src/main/resources/logback.xml b/log4j/src/main/resources/logback.xml
new file mode 100644
index 0000000000..c70bceab16
--- /dev/null
+++ b/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} %-5p %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} %-5p %m%n</pattern>
+    </encoder>
+  </appender>
+
+  # Override log level for specified package
+  <logger name="com.baeldung.log4j" level="TRACE"/>
+
+  <root level="DEBUG">
+    <appender-ref ref="stdout" />
+    <appender-ref ref="fout" />
+  </root>
+</configuration>
\ No newline at end of file

From 7704b2eb0107f24f39aba576c6651f916f1d641d Mon Sep 17 00:00:00 2001
From: oborkovskyi <oborkovskyi@playtika.com>
Date: Fri, 1 Jul 2016 17:38:30 +0300
Subject: [PATCH 2/4] Improved log4j project

---
 log4j/pom.xml                                 | 34 ++++++++-----------
 .../com/baeldung/log4j2/Log4j2Example.java    | 16 +++++++++
 .../com/baeldung/logback/LogbackExample.java  | 16 +++++++++
 log4j/src/main/resources/log4j.xml            |  2 +-
 log4j/src/main/resources/log4j2.xml           |  6 ++--
 log4j/src/main/resources/logback.xml          |  6 ++--
 6 files changed, 54 insertions(+), 26 deletions(-)
 create mode 100644 log4j/src/main/java/com/baeldung/log4j2/Log4j2Example.java
 create mode 100644 log4j/src/main/java/com/baeldung/logback/LogbackExample.java

diff --git a/log4j/pom.xml b/log4j/pom.xml
index 5c73dc848d..a70dab9d22 100644
--- a/log4j/pom.xml
+++ b/log4j/pom.xml
@@ -10,7 +10,6 @@
 
     <dependencies>
         <!--log4j dependencies-->
-
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -19,26 +18,23 @@
 
 
         <!--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>-->
+        <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>
 
         <!--logback dependencies-->
-
-        <!--<dependency>-->
-            <!--<groupId>ch.qos.logback</groupId>-->
-            <!--<artifactId>logback-classic</artifactId>-->
-            <!--<version>1.1.7</version>-->
-        <!--</dependency>-->
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.1.7</version>
+        </dependency>
     </dependencies>
     <build>
         <plugins>
diff --git a/log4j/src/main/java/com/baeldung/log4j2/Log4j2Example.java b/log4j/src/main/java/com/baeldung/log4j2/Log4j2Example.java
new file mode 100644
index 0000000000..60acc3a774
--- /dev/null
+++ b/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");
+    }
+
+}
diff --git a/log4j/src/main/java/com/baeldung/logback/LogbackExample.java b/log4j/src/main/java/com/baeldung/logback/LogbackExample.java
new file mode 100644
index 0000000000..536aa78ec9
--- /dev/null
+++ b/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");
+    }
+
+}
diff --git a/log4j/src/main/resources/log4j.xml b/log4j/src/main/resources/log4j.xml
index 1de6c62caf..6f64c63572 100644
--- a/log4j/src/main/resources/log4j.xml
+++ b/log4j/src/main/resources/log4j.xml
@@ -13,7 +13,7 @@
         <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} %-5p %m%n" />
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %p %m%n" />
         </layout>
     </appender>
 
diff --git a/log4j/src/main/resources/log4j2.xml b/log4j/src/main/resources/log4j2.xml
index 0a854b25b7..56c6706e91 100644
--- a/log4j/src/main/resources/log4j2.xml
+++ b/log4j/src/main/resources/log4j2.xml
@@ -4,19 +4,19 @@
         # Console appender
         <Console name="stdout" target="SYSTEM_OUT">
             # Pattern of log message for console appender
-            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n" />
+            <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} %-5p %m%n"/>
+            <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.log4j" level="TRACE"/>
+        <Logger name="com.baeldung.log4j2" level="TRACE"/>
 
         <Root level="DEBUG">
             <AppenderRef ref="stdout" />
diff --git a/log4j/src/main/resources/logback.xml b/log4j/src/main/resources/logback.xml
index c70bceab16..c1fd0aee59 100644
--- a/log4j/src/main/resources/logback.xml
+++ b/log4j/src/main/resources/logback.xml
@@ -3,7 +3,7 @@
   <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} %-5p %m%n</Pattern>
+      <Pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</Pattern>
     </layout>
   </appender>
 
@@ -14,12 +14,12 @@
     <append>false</append>
     <encoder>
       # Pattern of log message for file appender
-      <pattern>%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n</pattern>
+      <pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</pattern>
     </encoder>
   </appender>
 
   # Override log level for specified package
-  <logger name="com.baeldung.log4j" level="TRACE"/>
+  <logger name="com.baeldung.logback" level="TRACE"/>
 
   <root level="DEBUG">
     <appender-ref ref="stdout" />

From 29978cc4db79d90be9f3b9d92de71e4fb5cee094 Mon Sep 17 00:00:00 2001
From: oborkovskyi <oborkovskyi@playtika.com>
Date: Fri, 1 Jul 2016 18:52:08 +0300
Subject: [PATCH 3/4] Added log4j to pom

---
 pom.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pom.xml b/pom.xml
index 75281ce80d..4bef2ceb45 100644
--- a/pom.xml
+++ b/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>

From 980a3bdd333b6170946933149731f0c5fcdc7364 Mon Sep 17 00:00:00 2001
From: oborkovskyi <oborkovskyi@playtika.com>
Date: Mon, 4 Jul 2016 15:12:25 +0300
Subject: [PATCH 4/4] Added async

---
 log4j/pom.xml                       | 7 +++++++
 log4j/src/main/resources/log4j2.xml | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/log4j/pom.xml b/log4j/pom.xml
index a70dab9d22..78596a60d9 100644
--- a/log4j/pom.xml
+++ b/log4j/pom.xml
@@ -28,6 +28,13 @@
             <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>
diff --git a/log4j/src/main/resources/log4j2.xml b/log4j/src/main/resources/log4j2.xml
index 56c6706e91..6f627e97f8 100644
--- a/log4j/src/main/resources/log4j2.xml
+++ b/log4j/src/main/resources/log4j2.xml
@@ -18,9 +18,9 @@
         # Override log level for specified package
         <Logger name="com.baeldung.log4j2" level="TRACE"/>
 
-        <Root level="DEBUG">
+        <AsyncRoot level="DEBUG">
             <AppenderRef ref="stdout" />
             <AppenderRef ref="fout"/>
-        </Root>
+        </AsyncRoot>
     </Loggers>
 </Configuration>
\ No newline at end of file