Switch to Log4j2

demo/app/pom.xml

@@ -75,17 +75,21 @@
             <version>${project.version}</version>
         </dependency>
 
-        <!-- Logs -->
+        <!-- Logging -->
         <dependency>
-            <groupId>log4j</groupId>
+            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j</artifactId>
+            <artifactId>log4j-api</artifactId>
-            <version>1.2.16</version>
+            <version>${log4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>${log4j.version}</version>
         </dependency>
-
         <dependency>
-            <groupId>org.slf4j</groupId>
+            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
+            <artifactId>log4j-slf4j-impl</artifactId>
-            <version>${slf4j.version}</version>
+            <version>${log4j.version}</version>
         </dependency>
 
         <dependency>

demo/app/src/main/resources/log4j.properties

@@ -1,20 +0,0 @@
-log4j.rootLogger=DEBUG, Console
-
-#
-# PF4J log
-#
-log4j.logger.org.pf4j=DEBUG, Console
-# !!! Put the bellow classes on level TRACE when you are in trouble
-log4j.logger.org.pf4j.PluginClassLoader=DEBUG, Console
-log4j.logger.org.pf4j.AbstractExtensionFinder=DEBUG, Console
-log4j.additivity.org.pf4j=false
-log4j.additivity.org.pf4j.PluginClassLoader=false
-log4j.additivity.org.pf4j.AbstractExtensionFinder=false
-
-#
-# Appenders
-#
-log4j.appender.Console=org.apache.log4j.ConsoleAppender
-log4j.appender.Console.layout=org.apache.log4j.PatternLayout
-#log4j.appender.Console.layout.conversionPattern=%-5p - %-32.32c{1} - %m\n
-log4j.appender.Console.layout.ConversionPattern=%d %p %c - %m%n

demo/app/src/main/resources/log4j2.properties

@@ -0,0 +1,27 @@
+#
+# Appenders
+#
+appender.console.type = Console
+appender.console.name = console
+appender.console.layout.type = PatternLayout
+#appender.console.layout.pattern = %-5p - %-32.32c{1} - %m\n
+appender.console.layout.pattern = %d %p %c - %m%n
+
+#
+# Loggers
+#
+
+# PF4J log
+logger.pf4j.name = org.pf4j
+logger.pf4j.level = debug
+logger.pf4j.additivity = false
+logger.pf4j.appenderRef.console.ref = console
+
+# !!! Uncomment below loggers when you are in trouble
+#logger.loader.name = org.pf4j.PluginClassLoader
+#logger.loader.level = trace
+#logger.finder.name = org.pf4j.AbstractExtensionFinder
+#logger.finder.level = trace
+
+rootLogger.level = debug
+rootLogger.appenderRef.console.ref = console

maven-archetypes/quickstart/src/main/resources/archetype-resources/app/pom.xml

@@ -63,17 +63,21 @@
             <version>${pf4j.version}</version>
         </dependency>
 
-        <!-- Logs -->
+        <!-- Logging -->
         <dependency>
-            <groupId>log4j</groupId>
+            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j</artifactId>
+            <artifactId>log4j-api</artifactId>
-            <version>1.2.16</version>
+            <version>${log4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>${log4j.version}</version>
         </dependency>
-
         <dependency>
-            <groupId>org.slf4j</groupId>
+            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
+            <artifactId>log4j-slf4j-impl</artifactId>
-            <version>${slf4j.version}</version>
+            <version>${log4j.version}</version>
         </dependency>
 
         <dependency>

maven-archetypes/quickstart/src/main/resources/archetype-resources/app/src/main/resources/log4j.properties

@@ -1,20 +0,0 @@
-log4j.rootLogger=DEBUG, Console
-
-#
-# PF4J log
-#
-log4j.logger.org.pf4j=DEBUG, Console
-# !!! Put the bellow classes on level TRACE when you are in trouble
-log4j.logger.org.pf4j.PluginClassLoader=DEBUG, Console
-log4j.logger.org.pf4j.AbstractExtensionFinder=DEBUG, Console
-log4j.additivity.org.pf4j=false
-log4j.additivity.org.pf4j.PluginClassLoader=false
-log4j.additivity.org.pf4j.AbstractExtensionFinder=false
-
-#
-# Appenders
-#
-log4j.appender.Console=org.apache.log4j.ConsoleAppender
-log4j.appender.Console.layout=org.apache.log4j.PatternLayout
-#log4j.appender.Console.layout.conversionPattern=%-5p - %-32.32c{1} - %m\n
-log4j.appender.Console.layout.ConversionPattern=%d %p %c - %m%n

maven-archetypes/quickstart/src/main/resources/archetype-resources/app/src/main/resources/log4j2.properties

@@ -0,0 +1,27 @@
+#
+# Appenders
+#
+appender.console.type = Console
+appender.console.name = console
+appender.console.layout.type = PatternLayout
+#appender.console.layout.pattern = %-5p - %-32.32c{1} - %m\n
+appender.console.layout.pattern = %d %p %c - %m%n
+
+#
+# Loggers
+#
+
+# PF4J log
+logger.pf4j.name = org.pf4j
+logger.pf4j.level = debug
+logger.pf4j.additivity = false
+logger.pf4j.appenderRef.console.ref = console
+
+# !!! Uncomment below loggers when you are in trouble
+#logger.loader.name = org.pf4j.PluginClassLoader
+#logger.loader.level = trace
+#logger.finder.name = org.pf4j.AbstractExtensionFinder
+#logger.finder.level = trace
+
+rootLogger.level = debug
+rootLogger.appenderRef.console.ref = console

maven-archetypes/quickstart/src/main/resources/archetype-resources/pom.xml

@@ -27,6 +27,7 @@
 
         <pf4j.version>{{project.version}}</pf4j.version>
         <slf4j.version>1.7.7</slf4j.version>
+        <log4j.version>2.13.1</log4j.version>
     </properties>
 
     <build>

pf4j/pom.xml

@@ -72,12 +72,6 @@
             <artifactId>slf4j-api</artifactId>
             <version>${slf4j.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>${slf4j.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.github.zafarkhaja</groupId>
             <artifactId>java-semver</artifactId>
@@ -90,6 +84,26 @@
             <optional>true</optional>
         </dependency>
 
+        <!-- Logging -->
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>${log4j.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>${log4j.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-slf4j-impl</artifactId>
+            <version>${log4j.version}</version>
+            <scope>test</scope>
+        </dependency>
+
         <!-- Testing -->
         <dependency>
             <groupId>org.hamcrest</groupId>

pf4j/src/test/resources/log4j.properties

@@ -1,20 +0,0 @@
-log4j.rootLogger=DEBUG, Console
-
-#
-# PF4J log
-#
-log4j.logger.org.pf4j=DEBUG, Console
-# !!! Put the bellow classes on level TRACE when you are in trouble
-log4j.logger.org.pf4j.PluginClassLoader=WARN, Console
-log4j.logger.org.pf4j.AbstractExtensionFinder=DEBUG, Console
-log4j.additivity.org.pf4j=false
-log4j.additivity.org.pf4j.PluginClassLoader=false
-log4j.additivity.org.pf4j.AbstractExtensionFinder=false
-
-#
-# Appenders
-#
-log4j.appender.Console=org.apache.log4j.ConsoleAppender
-log4j.appender.Console.layout=org.apache.log4j.PatternLayout
-#log4j.appender.Console.layout.conversionPattern=%-5p - %-32.32c{1} - %m\n
-log4j.appender.Console.layout.ConversionPattern=%d %p %c - %m%n

pf4j/src/test/resources/log4j2.properties

@@ -0,0 +1,27 @@
+#
+# Appenders
+#
+appender.console.type = Console
+appender.console.name = console
+appender.console.layout.type = PatternLayout
+#appender.console.layout.pattern = %-5p - %-32.32c{1} - %m\n
+appender.console.layout.pattern = %d %p %c - %m%n
+
+#
+# Loggers
+#
+
+# PF4J log
+logger.pf4j.name = org.pf4j
+logger.pf4j.level = debug
+logger.pf4j.additivity = false
+logger.pf4j.appenderRef.console.ref = console
+
+# !!! Uncomment below loggers when you are in trouble
+#logger.loader.name = org.pf4j.PluginClassLoader
+#logger.loader.level = trace
+#logger.finder.name = org.pf4j.AbstractExtensionFinder
+#logger.finder.level = trace
+
+rootLogger.level = debug
+rootLogger.appenderRef.console.ref = console

pom.xml

@@ -46,6 +46,7 @@
         <maven.compiler.release>8</maven.compiler.release>
 
         <slf4j.version>1.7.25</slf4j.version>
+        <log4j.version>2.13.1</log4j.version>
         <asm.version>7.1</asm.version>
 
         <junit.version>5.4.0</junit.version>