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Posted to commits@logging.apache.org by mi...@apache.org on 2016/11/04 15:17:07 UTC

logging-log4j2 git commit: Support Scala 2.12

Repository: logging-log4j2
Updated Branches:
  refs/heads/LOG4J2-1661 [created] 5fb3f0281


Support Scala 2.12


Project: http://git-wip-us.apache.org/repos/asf/logging-log4j2/repo
Commit: http://git-wip-us.apache.org/repos/asf/logging-log4j2/commit/5fb3f028
Tree: http://git-wip-us.apache.org/repos/asf/logging-log4j2/tree/5fb3f028
Diff: http://git-wip-us.apache.org/repos/asf/logging-log4j2/diff/5fb3f028

Branch: refs/heads/LOG4J2-1661
Commit: 5fb3f0281e347fb715b336a05a65bcc43bf47f63
Parents: 4b12bb4
Author: Mikael St�ldal <mi...@magine.com>
Authored: Fri Nov 4 16:17:01 2016 +0100
Committer: Mikael St�ldal <mi...@magine.com>
Committed: Fri Nov 4 16:17:01 2016 +0100

----------------------------------------------------------------------
 log4j-api-scala_2.12/pom.xml                    | 157 +++++
 .../org/apache/logging/log4j/scala/Logger.scala | 592 +++++++++++++++++++
 .../logging/log4j/scala/LoggerMacro.scala       | 425 +++++++++++++
 .../apache/logging/log4j/scala/Logging.scala    |  30 +
 .../apache/logging/log4j/scala/LoggerTest.scala | 552 +++++++++++++++++
 log4j-bom/pom.xml                               |   6 +
 log4j-samples/scala-api/pom.xml                 |   4 +-
 pom.xml                                         |   6 +
 src/changes/changes.xml                         |   3 +
 src/site/site.xml                               |   1 +
 src/site/xdoc/manual/scala-api.xml              |   2 +-
 11 files changed, 1775 insertions(+), 3 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-api-scala_2.12/pom.xml
----------------------------------------------------------------------
diff --git a/log4j-api-scala_2.12/pom.xml b/log4j-api-scala_2.12/pom.xml
new file mode 100644
index 0000000..1c5e384
--- /dev/null
+++ b/log4j-api-scala_2.12/pom.xml
@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<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>
+  <parent>
+    <groupId>org.apache.logging.log4j</groupId>
+    <artifactId>log4j</artifactId>
+    <version>2.7.1-SNAPSHOT</version>
+    <relativePath>../</relativePath>
+  </parent>
+  <artifactId>log4j-api-scala_2.12</artifactId>
+  <packaging>jar</packaging>
+  <name>Apache Log4j Scala 2.12 wrapper for Log4j API</name>
+  <description>Scala wrapper for Log4j API</description>
+  <properties>
+    <log4jParentDir>${basedir}/..</log4jParentDir>
+    <projectDir>/scala_2.12</projectDir>
+    <scala.version>2.12.0</scala.version>
+    <scala.maven.plugin.version>3.2.2</scala.maven.plugin.version>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.logging.log4j</groupId>
+      <artifactId>log4j-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.scala-lang</groupId>
+      <artifactId>scala-library</artifactId>
+      <version>${scala.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.scala-lang</groupId>
+      <artifactId>scala-reflect</artifactId>
+      <version>${scala.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.logging.log4j</groupId>
+      <artifactId>log4j-api</artifactId>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.scalatest</groupId>
+      <artifactId>scalatest_2.12</artifactId>
+      <version>3.0.0</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>1.10.19</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <sourceDirectory>src/main/scala</sourceDirectory>
+    <testSourceDirectory>src/test/scala</testSourceDirectory>
+    <plugins>
+      <plugin>
+        <groupId>net.alchim31.maven</groupId>
+        <artifactId>scala-maven-plugin</artifactId>
+        <version>${scala.maven.plugin.version}</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>compile</goal>
+              <goal>testCompile</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <args>
+            <arg>-feature</arg>
+            <arg>-unchecked</arg>
+            <arg>-deprecation</arg>
+          </args>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+      </plugin>
+      <!-- Include the standard NOTICE and LICENSE -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-remote-resources-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>process</goal>
+            </goals>
+            <configuration>
+              <skip>false</skip>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.felix</groupId>
+        <artifactId>maven-bundle-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-changes-plugin</artifactId>
+        <version>${changes.plugin.version}</version>
+        <reportSets>
+          <reportSet>
+            <reports>
+              <report>changes-report</report>
+            </reports>
+          </reportSet>
+        </reportSets>
+        <configuration>
+          <issueLinkTemplate>%URL%/show_bug.cgi?id=%ISSUE%</issueLinkTemplate>
+          <useJql>true</useJql>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-pmd-plugin</artifactId>
+        <version>${pmd.plugin.version}</version>
+        <configuration>
+          <targetJdk>${maven.compile.target}</targetJdk>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>net.alchim31.maven</groupId>
+        <artifactId>scala-maven-plugin</artifactId>
+        <version>${scala.maven.plugin.version}</version>
+      </plugin>
+    </plugins>
+  </reporting>
+</project>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logger.scala
----------------------------------------------------------------------
diff --git a/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logger.scala b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logger.scala
new file mode 100644
index 0000000..b42cd5a
--- /dev/null
+++ b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logger.scala
@@ -0,0 +1,592 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+package org.apache.logging.log4j.scala
+
+import org.apache.logging.log4j.message.{EntryMessage, Message, MessageFactory2}
+import org.apache.logging.log4j.spi.ExtendedLogger
+import org.apache.logging.log4j.{Level, LogManager, Marker}
+
+import scala.language.experimental.macros
+
+/**
+  * Factory for [[Logger]]s.
+  *
+  * The [[Logging]] trait provides a simple way to get a properly named logger into a class.
+  */
+object Logger {
+
+  final val FQCN = getClass.getName
+
+    /**
+    * Create a properly named [[Logger]] for a given class.
+    *
+    * @param clazz the class
+    */
+  def apply(clazz: Class[_]): Logger = Logger(LogManager.getContext(clazz.getClassLoader, false).getLogger(clazz.getName))
+
+  /**
+    * Create a [[Logger]] wrapping the given Log4j logger.
+    *
+    * @param delegate the Log4j logger to wrap
+    */
+  def apply(delegate: ExtendedLogger): Logger = new Logger(delegate)
+
+}
+
+/**
+  * Scala wrapper for the Log4j `Logger` interface.
+  *
+  * Frequently the purpose of logging is to provide information about what is happening in the system,
+  * which requires including information about the objects being manipulated. In Scala, you can use
+  * [[http://docs.scala-lang.org/overviews/core/string-interpolation.html string interpolation]]
+  * to achieve this:
+  *
+  * {{{
+  * logger.debug(s"Logging in user ${user.getName} with birthday ${user.calcBirthday}")
+  * }}}
+  *
+  * Since this wrapper is implemented with macros, the String construction and method invocations
+  * will only occur when debug logging is enabled.
+  */
+class Logger private(val delegate: ExtendedLogger) extends AnyVal {
+
+  def fatal(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.fatalMarkerMsg
+
+  def fatal(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.fatalMarkerCseq
+
+  def fatal(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.fatalMarkerObject
+
+  def fatal(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.fatalMarkerMsgThrowable
+
+  def fatal(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.fatalMarkerCseqThrowable
+
+  def fatal(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.fatalMarkerObjectThrowable
+
+  def fatal(message: Message): Unit =
+  macro LoggerMacro.fatalMsg
+
+  def fatal(message: CharSequence): Unit =
+  macro LoggerMacro.fatalCseq
+
+  def fatal(message: AnyRef): Unit =
+  macro LoggerMacro.fatalObject
+
+  def fatal(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.fatalMsgThrowable
+
+  def fatal(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.fatalCseqThrowable
+
+  def fatal(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.fatalObjectThrowable
+
+
+  def error(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.errorMarkerMsg
+
+  def error(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.errorMarkerCseq
+
+  def error(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.errorMarkerObject
+
+  def error(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.errorMarkerMsgThrowable
+
+  def error(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.errorMarkerCseqThrowable
+
+  def error(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.errorMarkerObjectThrowable
+
+  def error(message: Message): Unit =
+  macro LoggerMacro.errorMsg
+
+  def error(message: CharSequence): Unit =
+  macro LoggerMacro.errorCseq
+
+  def error(message: AnyRef): Unit =
+  macro LoggerMacro.errorObject
+
+  def error(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.errorMsgThrowable
+
+  def error(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.errorCseqThrowable
+
+  def error(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.errorObjectThrowable
+
+
+  def warn(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.warnMarkerMsg
+
+  def warn(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.warnMarkerCseq
+
+  def warn(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.warnMarkerObject
+
+  def warn(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.warnMarkerMsgThrowable
+
+  def warn(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.warnMarkerCseqThrowable
+
+  def warn(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.warnMarkerObjectThrowable
+
+  def warn(message: Message): Unit =
+  macro LoggerMacro.warnMsg
+
+  def warn(message: CharSequence): Unit =
+  macro LoggerMacro.warnCseq
+
+  def warn(message: AnyRef): Unit =
+  macro LoggerMacro.warnObject
+
+  def warn(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.warnMsgThrowable
+
+  def warn(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.warnCseqThrowable
+
+  def warn(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.warnObjectThrowable
+
+
+  def info(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.infoMarkerMsg
+
+  def info(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.infoMarkerCseq
+
+  def info(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.infoMarkerObject
+
+  def info(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.infoMarkerMsgThrowable
+
+  def info(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.infoMarkerCseqThrowable
+
+  def info(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.infoMarkerObjectThrowable
+
+  def info(message: Message): Unit =
+  macro LoggerMacro.infoMsg
+
+  def info(message: CharSequence): Unit =
+  macro LoggerMacro.infoCseq
+
+  def info(message: AnyRef): Unit =
+  macro LoggerMacro.infoObject
+
+  def info(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.infoMsgThrowable
+
+  def info(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.infoCseqThrowable
+
+  def info(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.infoObjectThrowable
+
+
+  def debug(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.debugMarkerMsg
+
+  def debug(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.debugMarkerCseq
+
+  def debug(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.debugMarkerObject
+
+  def debug(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.debugMarkerMsgThrowable
+
+  def debug(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.debugMarkerCseqThrowable
+
+  def debug(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.debugMarkerObjectThrowable
+
+  def debug(message: Message): Unit =
+  macro LoggerMacro.debugMsg
+
+  def debug(message: CharSequence): Unit =
+  macro LoggerMacro.debugCseq
+
+  def debug(message: AnyRef): Unit =
+  macro LoggerMacro.debugObject
+
+  def debug(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.debugMsgThrowable
+
+  def debug(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.debugCseqThrowable
+
+  def debug(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.debugObjectThrowable
+
+
+  def trace(marker: Marker, message: Message): Unit =
+  macro LoggerMacro.traceMarkerMsg
+
+  def trace(marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.traceMarkerCseq
+
+  def trace(marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.traceMarkerObject
+
+  def trace(marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.traceMarkerMsgThrowable
+
+  def trace(marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.traceMarkerCseqThrowable
+
+  def trace(marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.traceMarkerObjectThrowable
+
+  def trace(message: Message): Unit =
+  macro LoggerMacro.traceMsg
+
+  def trace(message: CharSequence): Unit =
+  macro LoggerMacro.traceCseq
+
+  def trace(message: AnyRef): Unit =
+  macro LoggerMacro.traceObject
+
+  def trace(message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.traceMsgThrowable
+
+  def trace(message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.traceCseqThrowable
+
+  def trace(message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.traceObjectThrowable
+
+
+  /**
+    * Logs a `Message` with the specific `Marker` at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    */
+  def apply(level: Level, marker: Marker, message: Message): Unit =
+  macro LoggerMacro.logMarkerMsg
+
+  /**
+    * Logs a string with the specific `Marker` at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    */
+  def apply(level: Level, marker: Marker, message: CharSequence): Unit =
+  macro LoggerMacro.logMarkerCseq
+
+  /**
+    * Logs an object with the specific `Marker` at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    */
+  def apply(level: Level, marker: Marker, message: AnyRef): Unit =
+  macro LoggerMacro.logMarkerObject
+
+  /**
+    * Logs a `Message` with the specific `Marker` at the given `Level` including the stack trace
+    * of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    * @param cause   the cause
+    */
+  def apply(level: Level, marker: Marker, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.logMarkerMsgThrowable
+
+  /**
+    * Logs a string with the specific `Marker` at the given `Level` including the stack trace
+    * of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    * @param cause   the cause
+    */
+  def apply(level: Level, marker: Marker, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.logMarkerCseqThrowable
+
+  /**
+    * Logs an object with the specific `Marker` at the given `Level` including the stack trace
+    * of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param marker  the marker data specific to this log statement
+    * @param message the message to be logged
+    * @param cause   the cause
+    */
+  def apply(level: Level, marker: Marker, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.logMarkerObjectThrowable
+
+  /**
+    * Logs a `Message` at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    */
+  def apply(level: Level, message: Message): Unit =
+  macro LoggerMacro.logMsg
+
+  /**
+    * Logs a string at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    */
+  def apply(level: Level, message: CharSequence): Unit =
+  macro LoggerMacro.logCseq
+
+  /**
+    * Logs an object at the given `Level`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    */
+  def apply(level: Level, message: AnyRef): Unit =
+  macro LoggerMacro.logObject
+
+  /**
+    * Logs a `Message` at the given `Level` including the stack trace of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    * @param cause   a `Throwable`
+    */
+  def apply(level: Level, message: Message, cause: Throwable): Unit =
+  macro LoggerMacro.logMsgThrowable
+
+  /**
+    * Logs a string at the given `Level` including the stack trace of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    * @param cause   a `Throwable`
+    */
+  def apply(level: Level, message: CharSequence, cause: Throwable): Unit =
+  macro LoggerMacro.logCseqThrowable
+
+  /**
+    * Logs an object at the given `Level` including the stack trace of the given `Throwable`.
+    *
+    * @param level   the logging level
+    * @param message the message to be logged
+    * @param cause   a `Throwable`
+    */
+  def apply(level: Level, message: AnyRef, cause: Throwable): Unit =
+  macro LoggerMacro.logObjectThrowable
+
+
+  /**
+    * Logs entry to a method. Used when the method in question has no parameters or when the parameters should not be
+    * logged.
+    *
+    * @return The built `EntryMessage`
+    */
+  def traceEntry(): EntryMessage =
+  macro LoggerMacro.traceEntry
+
+  /**
+    * Logs entry to a method along with its parameters.
+    *
+    * {{{
+    * def doSomething(foo: String, bar: Int): Unit = {
+    *   logger.traceEntry(foo, bar)
+    *   // do something
+    * }
+    * }}}
+    *
+    * @param params the parameters to the method.
+    * @return The built `EntryMessage`
+    */
+  def traceEntry(params: AnyRef*): EntryMessage =
+  macro LoggerMacro.traceEntryParams
+
+  /**
+    * Logs entry to a method using a `Message` to describe the parameters.
+    *
+    * {{{
+    * def doSomething(foo: Request): Unit = {
+    *   logger.traceEntry(JsonMessage(foo))
+    *   // do something
+    * }
+    * }}}
+    *
+    * @param message the message
+    * @return The built `EntryMessage`
+    */
+  def traceEntry(message: Message): EntryMessage =
+  macro LoggerMacro.traceEntryMessage
+
+  /**
+    * Logs exit from a method with no result.
+    */
+  def traceExit(): Unit =
+  macro LoggerMacro.traceExit
+
+  /**
+    * Logs exiting from a method with result.
+    *
+    * @param result The result being returned from the method call
+    * @return `result`
+    */
+  def traceExit[R](result: R): R =
+  macro LoggerMacro.traceExitResult[R]
+
+  /**
+    * Logs exiting from a method with no result.
+    *
+    * @param entryMessage the `EntryMessage` returned from one of the `traceEntry` methods
+    */
+  def traceExit(entryMessage: EntryMessage): Unit =
+  macro LoggerMacro.traceExitEntryMessage
+
+  /**
+    * Logs exiting from a method with result.
+    *
+    * {{{
+    * def doSomething(foo: String, bar: Int): Int = {
+    *   val entryMessage = logger.traceEntry(foo, bar)
+    *   // do something
+    *   traceExit(entryMessage, value)
+    * }
+    * }}}
+    *
+    * @param entryMessage the `EntryMessage` returned from one of the `traceEntry` methods
+    * @param result       The result being returned from the method call
+    * @return `result`
+    */
+  def traceExit[R](entryMessage: EntryMessage, result: R): R =
+  macro LoggerMacro.traceExitEntryMessageResult[R]
+
+  /**
+    * Logs exiting from a method with result. Allows custom formatting of the result.
+    *
+    * @param message the Message containing the formatted result
+    * @param result  The result being returned from the method call.
+    * @return `result`
+    */
+  def traceExit[R](message: Message, result: R): R =
+  macro LoggerMacro.traceExitMessageResult[R]
+
+  /**
+    * Logs an exception or error to be thrown.
+    *
+    * {{{
+    *   throw logger.throwing(myException)
+    * }}}
+    *
+    * @param t the Throwable
+    * @return `t`
+    */
+  def throwing[T <: Throwable](t: T): T =
+  macro LoggerMacro.throwing[T]
+
+  /**
+    * Logs an exception or error to be thrown to a specific logging level.
+    *
+    * {{{
+    *   throw logger.throwing(Level.DEBUG, myException)
+    * }}}
+    *
+    * @param level the logging Level.
+    * @param t     the Throwable
+    * @return `t`
+    */
+  def throwing[T <: Throwable](level: Level, t: T): T =
+  macro LoggerMacro.throwingLevel[T]
+
+  /**
+    * Logs an exception or error that has been caught.
+    *
+    * @param t the Throwable.
+    */
+  def catching(t: Throwable): Unit =
+  macro LoggerMacro.catching
+
+  /**
+    * Logs an exception or error that has been caught to a specific logging level.
+    *
+    * @param level The logging Level.
+    * @param t     The Throwable.
+    */
+  def catching(level: Level, t: Throwable): Unit =
+  macro LoggerMacro.catchingLevel
+
+
+  /** Always logs a message at the specified level. It is the responsibility of the caller to ensure the specified
+    * level is enabled.
+    *
+    * Should normally not be used directly from application code, but needs to be public for access by macros.
+    *
+    * @param level   log level
+    * @param marker  marker or `null`
+    * @param message message
+    * @param cause   cause or `null`
+    */
+  def logMessage(level: Level, marker: Marker, message: Message, cause: Throwable): Unit = {
+    delegate.logMessage(Logger.FQCN, level, marker, message, cause)
+  }
+
+  /** Always logs a message at the specified level. It is the responsibility of the caller to ensure the specified
+    * level is enabled.
+    *
+    * Should normally not be used directly from application code, but needs to be public for access by macros.
+    *
+    * @param level   log level
+    * @param marker  marker or `null`
+    * @param message message
+    * @param cause   cause or `null`
+    */
+  def logMessage(level: Level, marker: Marker, message: CharSequence, cause: Throwable): Unit = {
+    delegate.logMessage(Logger.FQCN, level, marker, delegate.getMessageFactory.asInstanceOf[MessageFactory2].newMessage(message), cause)
+  }
+
+  /** Always logs a message at the specified level. It is the responsibility of the caller to ensure the specified
+    * level is enabled.
+    *
+    * Should normally not be used directly from application code, but needs to be public for access by macros.
+    *
+    * @param level   log level
+    * @param marker  marker or `null`
+    * @param message message
+    * @param cause   cause or `null`
+    */
+  def logMessage(level: Level, marker: Marker, message: AnyRef, cause: Throwable): Unit = {
+    delegate.logMessage(Logger.FQCN, level, marker, delegate.getMessageFactory.asInstanceOf[MessageFactory2].newMessage(message), cause)
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/LoggerMacro.scala
----------------------------------------------------------------------
diff --git a/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/LoggerMacro.scala b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/LoggerMacro.scala
new file mode 100644
index 0000000..3b54db1
--- /dev/null
+++ b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/LoggerMacro.scala
@@ -0,0 +1,425 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+package org.apache.logging.log4j.scala
+
+import org.apache.logging.log4j.message.{EntryMessage, Message}
+import org.apache.logging.log4j.spi.AbstractLogger
+import org.apache.logging.log4j.{Level, Marker}
+
+import scala.language.experimental.macros
+import scala.reflect.macros.blackbox
+
+/**
+  * Inspired from [[https://github.com/typesafehub/scalalogging ScalaLogging]].
+  */
+private object LoggerMacro {
+
+  type LoggerContext = blackbox.Context { type PrefixType = Logger }
+
+
+  def fatalMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.FATAL), marker, message)
+
+  def fatalMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.FATAL), marker, message)
+
+  def fatalMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.FATAL), marker, message)
+
+  def fatalMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.FATAL), marker, message, cause)
+
+  def fatalMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.FATAL), marker, message, cause)
+
+  def fatalMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.FATAL), marker, message, cause)
+
+  def fatalMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.FATAL), message)
+
+  def fatalCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.FATAL), message)
+
+  def fatalObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.FATAL), message)
+
+  def fatalMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.FATAL), message, cause)
+
+  def fatalCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.FATAL), message, cause)
+
+  def fatalObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.FATAL), message, cause)
+
+
+  def errorMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.ERROR), marker, message)
+
+  def errorMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.ERROR), marker, message)
+
+  def errorMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.ERROR), marker, message)
+
+  def errorMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.ERROR), marker, message, cause)
+
+  def errorMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.ERROR), marker, message, cause)
+
+  def errorMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.ERROR), marker, message, cause)
+
+  def errorMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.ERROR), message)
+
+  def errorCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.ERROR), message)
+
+  def errorObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.ERROR), message)
+
+  def errorMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.ERROR), message, cause)
+
+  def errorCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.ERROR), message, cause)
+
+  def errorObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.ERROR), message, cause)
+
+
+  def warnMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.WARN), marker, message)
+
+  def warnMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.WARN), marker, message)
+
+  def warnMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.WARN), marker, message)
+
+  def warnMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.WARN), marker, message, cause)
+
+  def warnMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.WARN), marker, message, cause)
+
+  def warnMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.WARN), marker, message, cause)
+
+  def warnMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.WARN), message)
+
+  def warnCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.WARN), message)
+
+  def warnObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.WARN), message)
+
+  def warnMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.WARN), message, cause)
+
+  def warnCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.WARN), message, cause)
+
+  def warnObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.WARN), message, cause)
+
+
+  def infoMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.INFO), marker, message)
+
+  def infoMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.INFO), marker, message)
+
+  def infoMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.INFO), marker, message)
+
+  def infoMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.INFO), marker, message, cause)
+
+  def infoMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.INFO), marker, message, cause)
+
+  def infoMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.INFO), marker, message, cause)
+
+  def infoMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.INFO), message)
+
+  def infoCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.INFO), message)
+
+  def infoObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.INFO), message)
+
+  def infoMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.INFO), message, cause)
+
+  def infoCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.INFO), message, cause)
+
+  def infoObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.INFO), message, cause)
+
+
+  def debugMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.DEBUG), marker, message)
+
+  def debugMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.DEBUG), marker, message)
+
+  def debugMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.DEBUG), marker, message)
+
+  def debugMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.DEBUG), marker, message, cause)
+
+  def debugMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.DEBUG), marker, message, cause)
+
+  def debugMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.DEBUG), marker, message, cause)
+
+  def debugMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.DEBUG), message)
+
+  def debugCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.DEBUG), message)
+
+  def debugObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.DEBUG), message)
+
+  def debugMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.DEBUG), message, cause)
+
+  def debugCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.DEBUG), message, cause)
+
+  def debugObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.DEBUG), message, cause)
+
+
+  def traceMarkerMsg(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message]) =
+    logMarkerMsg(c)(c.universe.reify(Level.TRACE), marker, message)
+
+  def traceMarkerCseq(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    logMarkerCseq(c)(c.universe.reify(Level.TRACE), marker, message)
+
+  def traceMarkerObject(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    logMarkerObject(c)(c.universe.reify(Level.TRACE), marker, message)
+
+  def traceMarkerMsgThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMarkerMsgThrowable(c)(c.universe.reify(Level.TRACE), marker, message, cause)
+
+  def traceMarkerCseqThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logMarkerCseqThrowable(c)(c.universe.reify(Level.TRACE), marker, message, cause)
+
+  def traceMarkerObjectThrowable(c: LoggerContext)(marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logMarkerObjectThrowable(c)(c.universe.reify(Level.TRACE), marker, message, cause)
+
+  def traceMsg(c: LoggerContext)(message: c.Expr[Message]) =
+    logMsg(c)(c.universe.reify(Level.TRACE), message)
+
+  def traceCseq(c: LoggerContext)(message: c.Expr[CharSequence]) =
+    logCseq(c)(c.universe.reify(Level.TRACE), message)
+
+  def traceObject(c: LoggerContext)(message: c.Expr[AnyRef]) =
+    logObject(c)(c.universe.reify(Level.TRACE), message)
+
+  def traceMsgThrowable(c: LoggerContext)(message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    logMsgThrowable(c)(c.universe.reify(Level.TRACE), message, cause)
+
+  def traceCseqThrowable(c: LoggerContext)(message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    logCseqThrowable(c)(c.universe.reify(Level.TRACE), message, cause)
+
+  def traceObjectThrowable(c: LoggerContext)(message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    logObjectThrowable(c)(c.universe.reify(Level.TRACE), message, cause)
+
+
+  def logMarkerMsg(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[Message]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, null)
+      }
+    )
+
+  def logMarkerCseq(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[CharSequence]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, null)
+      }
+    )
+
+  def logMarkerObject(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[AnyRef]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, null)
+      }
+    )
+
+  def logMarkerMsgThrowable(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, cause.splice)
+      }
+    )
+
+  def logMarkerCseqThrowable(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, cause.splice)
+      }
+    )
+
+  def logMarkerObjectThrowable(c: LoggerContext)(level: c.Expr[Level], marker: c.Expr[Marker], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice, marker.splice)) {
+        c.prefix.splice.logMessage(level.splice, marker.splice, message.splice, cause.splice)
+      }
+    )
+
+  def logMsg(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[Message]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, null)
+      }
+    )
+
+  def logCseq(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[CharSequence]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, null)
+      }
+    )
+
+  def logObject(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[AnyRef]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, null)
+      }
+    )
+
+  def logMsgThrowable(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[Message], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, cause.splice)
+      }
+    )
+
+  def logCseqThrowable(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[CharSequence], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, cause.splice)
+      }
+    )
+
+  def logObjectThrowable(c: LoggerContext)(level: c.Expr[Level], message: c.Expr[AnyRef], cause: c.Expr[Throwable]) =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(level.splice)) {
+        c.prefix.splice.logMessage(level.splice, null, message.splice, cause.splice)
+      }
+    )
+
+
+  def traceEntry(c: LoggerContext)(): c.Expr[EntryMessage] =
+    c.universe.reify(
+      c.prefix.splice.delegate.traceEntry()
+    )
+
+  def traceEntryParams(c: LoggerContext)(params: c.Expr[AnyRef]*): c.Expr[EntryMessage] = {
+    import c.universe._
+    val isEnabled = Apply(
+      Select(Select(c.prefix.tree, TermName("delegate")), TermName("isEnabled")),
+      List(
+        reify(Level.TRACE).tree,
+        reify(AbstractLogger.ENTRY_MARKER).tree,
+        reify(null: AnyRef).tree,
+        reify(null).tree
+      )
+    )
+
+    val log = Apply(
+      Select(Select(c.prefix.tree, TermName("delegate")), TermName("traceEntry")),
+      reify(null: String).tree :: (params map (_.tree)).toList
+    )
+    c.Expr[EntryMessage](If(isEnabled, log, reify(null).tree))
+  }
+
+
+  def traceEntryMessage(c: LoggerContext)(message: c.Expr[Message]): c.Expr[EntryMessage] =
+    c.universe.reify(
+      if (c.prefix.splice.delegate.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null: AnyRef, null)) {
+        c.prefix.splice.delegate.traceEntry(message.splice)  // TODO should not do ifEnabled check
+      } else {
+        null
+      }
+    )
+
+  def traceExit(c: LoggerContext)(): c.Expr[Unit] =
+    c.universe.reify(
+      c.prefix.splice.delegate.traceExit()
+    )
+
+  def traceExitResult[R: c.WeakTypeTag](c: LoggerContext)(result: c.Expr[R]): c.Expr[R] =
+    c.universe.reify(
+      c.prefix.splice.delegate.traceExit(result.splice)
+    )
+
+  def traceExitEntryMessage(c: LoggerContext)(entryMessage: c.Expr[EntryMessage]): c.Expr[Unit] =
+    c.universe.reify(
+      c.prefix.splice.delegate.traceExit(entryMessage.splice)
+    )
+
+  def traceExitEntryMessageResult[R: c.WeakTypeTag](c: LoggerContext)(entryMessage: c.Expr[EntryMessage], result: c.Expr[R]): c.Expr[R] =
+    c.universe.reify(
+      c.prefix.splice.delegate.traceExit(entryMessage.splice, result.splice)
+    )
+
+  def traceExitMessageResult[R: c.WeakTypeTag](c: LoggerContext)(message: c.Expr[Message], result: c.Expr[R]): c.Expr[R] =
+    c.universe.reify(
+      {
+        if (message.splice != null && c.prefix.splice.delegate.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, message.splice, null)) {
+          c.prefix.splice.delegate.traceExit(message.splice, result.splice)  // TODO should not do ifEnabled check
+        }
+        result.splice
+      }
+    )
+
+  def throwing[T <: Throwable: c.WeakTypeTag](c: LoggerContext)(t: c.Expr[T]): c.Expr[T] =
+    c.universe.reify(
+      c.prefix.splice.delegate.throwing(t.splice)
+    )
+
+  def throwingLevel[T <: Throwable: c.WeakTypeTag](c: LoggerContext)(level: c.Expr[Level], t: c.Expr[T]): c.Expr[T] =
+    c.universe.reify(
+      c.prefix.splice.delegate.throwing(level.splice, t.splice)
+    )
+
+  def catching(c: LoggerContext)(t: c.Expr[Throwable]): c.Expr[Unit] =
+    c.universe.reify(
+      c.prefix.splice.delegate.catching(t.splice)
+    )
+
+  def catchingLevel(c: LoggerContext)(level: c.Expr[Level], t: c.Expr[Throwable]): c.Expr[Unit] =
+    c.universe.reify(
+      c.prefix.splice.delegate.catching(level.splice, t.splice)
+    )
+
+}

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logging.scala
----------------------------------------------------------------------
diff --git a/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logging.scala b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logging.scala
new file mode 100644
index 0000000..b017de7
--- /dev/null
+++ b/log4j-api-scala_2.12/src/main/scala/org/apache/logging/log4j/scala/Logging.scala
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+package org.apache.logging.log4j.scala
+
+/**
+  * Mix in this trait into classes from which you want to log,
+  * give you a `logger` value with a [[Logger]] named according to the class.
+  */
+trait Logging {
+
+  /**
+    * A [[Logger]] named according to the class.
+    */
+  protected val logger: Logger = Logger(getClass)
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-api-scala_2.12/src/test/scala/org/apache/logging/log4j/scala/LoggerTest.scala
----------------------------------------------------------------------
diff --git a/log4j-api-scala_2.12/src/test/scala/org/apache/logging/log4j/scala/LoggerTest.scala b/log4j-api-scala_2.12/src/test/scala/org/apache/logging/log4j/scala/LoggerTest.scala
new file mode 100644
index 0000000..bd12742
--- /dev/null
+++ b/log4j-api-scala_2.12/src/test/scala/org/apache/logging/log4j/scala/LoggerTest.scala
@@ -0,0 +1,552 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+package org.apache.logging.log4j.scala
+
+import org.apache.logging.log4j.message.{DefaultFlowMessageFactory, Message, ParameterizedMessage, ParameterizedMessageFactory}
+import org.apache.logging.log4j.spi.{AbstractLogger, ExtendedLogger}
+import org.apache.logging.log4j.{Level, Marker, MarkerManager}
+import org.junit.runner.RunWith
+import org.mockito.Matchers.{any, anyString, eq => eqv}
+import org.mockito.Mockito._
+import org.scalatest.junit.JUnitRunner
+import org.scalatest.mockito.MockitoSugar
+import org.scalatest.{FunSuite, Matchers}
+
+import scala.language.reflectiveCalls  // needed for Mockito mocking
+
+case class Custom(i: Int)
+
+trait Manager {
+  def fetchValue(): Int
+}
+
+@RunWith(classOf[JUnitRunner])
+class LoggerTest extends FunSuite with Matchers with MockitoSugar {
+
+  val msg = new ParameterizedMessage("msg {}", 17)
+  val entryMsg = new DefaultFlowMessageFactory().newEntryMessage(msg)
+  val cseqMsg: CharSequence = new StringBuilder().append("cseq msg")
+  val objectMsg = Custom(17)
+  val cause = new RuntimeException("cause")
+  val marker = MarkerManager.getMarker("marker")
+  val result = "foo"
+
+  def fixture =
+    new {
+      val mockLogger = {
+        val mockLogger = mock[ExtendedLogger]
+        when(mockLogger.getMessageFactory).thenReturn(new ParameterizedMessageFactory)
+        mockLogger
+      }
+      val manager = {
+        val mockManager = mock[Manager]
+        when(mockManager.fetchValue()).thenReturn(4711)
+        mockManager
+      }
+    }
+
+  test("fatal enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.FATAL)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.fatal(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.FATAL), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("fatal disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.FATAL)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.fatal(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("error enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.ERROR)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.error(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.ERROR), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("error disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.ERROR)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.error(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("warn enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.WARN)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.warn(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.WARN), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("warn disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.WARN)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.warn(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("info enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.info(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("info disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.info(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("debug enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.DEBUG)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.debug(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.DEBUG), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("debug disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.DEBUG)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.debug(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("trace enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.trace(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.TRACE), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("trace disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.trace(s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+
+  test("log enabled with Message message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, msg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), eqv(msg), eqv(null))
+  }
+
+  test("log disabled with Message message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, msg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with String message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("log disabled with String message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("log enabled with CharSequence message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, cseqMsg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(null))
+  }
+
+  test("log disabled with CharSequence message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, cseqMsg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Object message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, objectMsg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(null))
+  }
+
+  test("log disabled with Object message and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, objectMsg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Message message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, msg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), eqv(msg), eqv(cause))
+  }
+
+  test("log disabled with Message message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, msg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with String message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, s"string msg with value: ${f.manager.fetchValue()}", cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(cause))
+    verify(f.manager).fetchValue()
+  }
+
+  test("log disabled with String message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, s"string msg with value: ${f.manager.fetchValue()}", cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("log enabled with CharSequence message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, cseqMsg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(cause))
+  }
+
+  test("log disabled with CharSequence message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, cseqMsg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Object message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, objectMsg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(marker), any[Message], eqv(cause))
+  }
+
+  test("log disabled with Object message and cause and Marker") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO, marker)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, marker, objectMsg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Message message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, msg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), eqv(msg), eqv(null))
+  }
+
+  test("log disabled with Message message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, msg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(null))
+    verify(f.manager).fetchValue()
+  }
+
+  test("log disabled with String message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, s"string msg with value: ${f.manager.fetchValue()}")
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("log enabled with CharSequence message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, cseqMsg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(null))
+  }
+
+  test("log disabled with CharSequence message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, cseqMsg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Object message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, objectMsg)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(null))
+  }
+
+  test("log disabled with Object message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, objectMsg)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Message message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, msg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), eqv(msg), eqv(cause))
+  }
+
+  test("log disabled with Message message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, msg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with String message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, s"string msg with value: ${f.manager.fetchValue()}", cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(cause))
+    verify(f.manager).fetchValue()
+  }
+
+  test("log disabled with String message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, s"string msg with value: ${f.manager.fetchValue()}", cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+    verify(f.manager, never).fetchValue()
+  }
+
+  test("log enabled with CharSequence message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, cseqMsg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(cause))
+  }
+
+  test("log disabled with CharSequence message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, cseqMsg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+  test("log enabled with Object message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, objectMsg, cause)
+    verify(f.mockLogger).logMessage(anyString(), eqv(Level.INFO), eqv(null), any[Message], eqv(cause))
+  }
+
+  test("log disabled with Object message and cause") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.INFO)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger(Level.INFO, objectMsg, cause)
+    verify(f.mockLogger, never).logMessage(anyString(), any[Level], any[Marker], any[Message], any[Throwable])
+  }
+
+
+  test("traceEntry") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null.asInstanceOf[AnyRef], null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceEntry()
+    verify(f.mockLogger).traceEntry()
+  }
+
+  test("traceEntry enabled with params") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null.asInstanceOf[AnyRef], null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceEntry("foo", "bar")
+    verify(f.mockLogger).traceEntry(null: String, "foo", "bar")
+  }
+
+  test("traceEntry disabled with params") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null.asInstanceOf[AnyRef], null)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.traceEntry("foo", "bar")
+    verify(f.mockLogger, never).traceEntry(anyString(), anyString(), anyString())
+  }
+
+  test("traceEntry enabled with message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null.asInstanceOf[AnyRef], null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceEntry(msg)
+    verify(f.mockLogger).traceEntry(eqv(msg))
+  }
+
+  test("traceEntry disabled with message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.ENTRY_MARKER, null.asInstanceOf[AnyRef], null)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.traceEntry(msg)
+    verify(f.mockLogger, never).traceEntry(any[Message])
+  }
+
+  test("traceExit") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit()
+    verify(f.mockLogger).traceExit()
+  }
+
+  test("traceExit with result") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit(result)
+    verify(f.mockLogger).traceExit(result)
+  }
+
+  test("traceExit with entrymessage") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit(entryMsg)
+    verify(f.mockLogger).traceExit(entryMsg)
+  }
+
+  test("traceExit with entrymessage and result") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit(entryMsg, result)
+    verify(f.mockLogger).traceExit(entryMsg, result)
+  }
+
+  test("traceExit enabled with message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(true)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit(msg, result)
+    verify(f.mockLogger).traceExit(eqv(msg), eqv(result))
+  }
+
+  test("traceExit disabled with message") {
+    val f = fixture
+    when(f.mockLogger.isEnabled(Level.TRACE, AbstractLogger.EXIT_MARKER, msg, null)).thenReturn(false)
+    val logger = Logger(f.mockLogger)
+    logger.traceExit(msg, result)
+    verify(f.mockLogger, never).traceExit(any[Message], any[AnyRef])
+  }
+
+  test("throwing") {
+    val f = fixture
+    val logger = Logger(f.mockLogger)
+    logger.throwing(cause)
+    verify(f.mockLogger).throwing(eqv(cause))
+  }
+
+  test("throwing with level") {
+    val f = fixture
+    val logger = Logger(f.mockLogger)
+    logger.throwing(Level.INFO, cause)
+    verify(f.mockLogger).throwing(eqv(Level.INFO), eqv(cause))
+  }
+
+  test("catching") {
+    val f = fixture
+    val logger = Logger(f.mockLogger)
+    logger.catching(cause)
+    verify(f.mockLogger).catching(eqv(cause))
+  }
+
+  test("catching with level") {
+    val f = fixture
+    val logger = Logger(f.mockLogger)
+    logger.catching(Level.INFO, cause)
+    verify(f.mockLogger).catching(eqv(Level.INFO), eqv(cause))
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-bom/pom.xml
----------------------------------------------------------------------
diff --git a/log4j-bom/pom.xml b/log4j-bom/pom.xml
index 6dee82f..e64851f 100644
--- a/log4j-bom/pom.xml
+++ b/log4j-bom/pom.xml
@@ -120,6 +120,12 @@
         <artifactId>log4j-api-scala_2.11</artifactId>
         <version>${project.version}</version>
       </dependency>
+      <!-- Scala 2.12 API -->
+      <dependency>
+        <groupId>org.apache.logging.log4j</groupId>
+        <artifactId>log4j-api-scala_2.12</artifactId>
+        <version>${project.version}</version>
+      </dependency>
     </dependencies>
   </dependencyManagement>
   <build>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/log4j-samples/scala-api/pom.xml
----------------------------------------------------------------------
diff --git a/log4j-samples/scala-api/pom.xml b/log4j-samples/scala-api/pom.xml
index 4bfea66..7054dcf 100644
--- a/log4j-samples/scala-api/pom.xml
+++ b/log4j-samples/scala-api/pom.xml
@@ -27,13 +27,13 @@
   <name>Apache Log4j Samples: Scala API</name>
   <url>http://http://logging.apache.org/log4j/2.x/</url>
   <properties>
-    <scala.version>2.11.8</scala.version>
+    <scala.version>2.12.0</scala.version>
     <scala.maven.plugin.version>3.2.2</scala.maven.plugin.version>
   </properties>
   <dependencies>
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
-      <artifactId>log4j-api-scala_2.11</artifactId>
+      <artifactId>log4j-api-scala_2.12</artifactId>
     </dependency>
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/pom.xml
----------------------------------------------------------------------
diff --git a/pom.xml b/pom.xml
index 82a001d..cc143fa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -388,6 +388,11 @@
         <version>${project.version}</version>
       </dependency>
       <dependency>
+        <groupId>org.apache.logging.log4j</groupId>
+        <artifactId>log4j-api-scala_2.12</artifactId>
+        <version>${project.version}</version>
+      </dependency>
+      <dependency>
         <groupId>com.sleepycat</groupId>
         <artifactId>je</artifactId>
         <version>5.0.73</version>
@@ -1260,6 +1265,7 @@
     <module>log4j-liquibase</module>
     <module>log4j-api-scala_2.10</module>
     <module>log4j-api-scala_2.11</module>
+    <module>log4j-api-scala_2.12</module>
   </modules>
   <profiles>
     <profile>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/src/changes/changes.xml
----------------------------------------------------------------------
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index d017257..86cceb4 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -24,6 +24,9 @@
   </properties>
   <body>
     <release version="2.8" date="2016-MM-DD" description="GA Release 2.8">
+      <action issue="LOG4J2-1661" dev="mikes" type="add">
+        Support Scala 2.12.
+      </action>
       <action issue="LOG4J2-1660" dev="rpopma" type="add">
         Added public method ThreadContext::getThreadContextMap; removed class ThreadContextAccess.
       </action>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/src/site/site.xml
----------------------------------------------------------------------
diff --git a/src/site/site.xml b/src/site/site.xml
index b99af21..8c1b4e0 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -256,6 +256,7 @@
       <item name="JUL Adapter" href="log4j-jul/index.html"/>
       <item name="Scala 2.10 API" href="log4j-api-scala_2.10/index.html"/>
       <item name="Scala 2.11 API" href="log4j-api-scala_2.11/index.html"/>
+      <item name="Scala 2.12 API" href="log4j-api-scala_2.12/index.html"/>
       <item name="Log4j 2 to SLF4J Adapter" href="log4j-to-slf4j/index.html"/>
       <item name="Apache Flume Appender" href="log4j-flume-ng/index.html"/>
       <item name="Log4j Tag Library" href="log4j-taglib/index.html"/>

http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/5fb3f028/src/site/xdoc/manual/scala-api.xml
----------------------------------------------------------------------
diff --git a/src/site/xdoc/manual/scala-api.xml b/src/site/xdoc/manual/scala-api.xml
index b207468..4da316a 100644
--- a/src/site/xdoc/manual/scala-api.xml
+++ b/src/site/xdoc/manual/scala-api.xml
@@ -37,7 +37,7 @@
                 <h4>Requirements</h4>
                 <p>
                     Log4j 2 Scala API is dependent on the Log4j 2 API, Scala runtime library and reflection.
-                    It currently supports Scala 2.10 and 2.11.
+                    It currently supports Scala 2.10, 2.11 and 2.12.
                 </p>
 
                 <h4>Example</h4>