Add Log4j modules

Author: rgoers

README.md

@@ -7,6 +7,8 @@ and contains two modules `pl.tfij.java9modules.app` and `pl.tfij.java9modules.gr
 The first one has a dependency to the second one.
 Each module contains only one class with a one single-line method.
 
+This project has been modified from the original to demonstrate Log4j working as modules in Java 9.
+
 Included scripts allow to easily run the code.
 To compile the code just start a `compile.sh` script.
 Then execute the `package.sh` to build jar files.

compile.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-javac -d build --module-source-path src $(find src -name "*.java")
+javac -d build --module-path lib --module-source-path src $(find src -name "*.java")

lib/log4j-api-2.10.1-SNAPSHOT.jar

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
 mkdir -p mods
 jar --create --file=mods/[email protected] --module-version=1.0 --main-class=pl.tfij.java9modules.app.ModuleApp -C build/pl.tfij.java9modules.app .
+jar --create --file=mods/[email protected] --module-version=1.0 --main-class=pl.tfij.java9modules.slf4japp.SLF4JApp -C build/pl.tfij.java9modules.slf4japp .
 jar --create --file=mods/[email protected] --module-version=1.0 -C build/pl.tfij.java9modules.greetings .

lib/log4j-core-2.10.1-SNAPSHOT.jar

@@ -0,0 +1,31 @@
+<?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.
+
+-->
+<Configuration status="ERROR">
+  <Appenders>
+    <Console name="Console" target="SYSTEM_OUT">
+      <PatternLayout pattern="%d [%t] %-5level: %msg%n%throwable" />
+    </Console>
+  </Appenders>
+  <Loggers>
+    <Logger name="org.foo" level="DEBUG" />
+    <Root level="TRACE">
+      <AppenderRef ref="Console" />
+    </Root>
+  </Loggers>
+</Configuration>

lib/log4j-slf4j-impl-2.10.0.jar

@@ -1,2 +1,6 @@
 #!/usr/bin/env bash
-java --module-path mods --module pl.tfij.java9modules.app
+echo "Running Log4j2 application"
+java --module-path mods:lib -cp $PWD/resources --module pl.tfij.java9modules.app
+
+echo "Running SLF4J application"
+java --module-path mods:lib -cp $PWD/resources --module pl.tfij.java9modules.slf4japp

lib/slf4j-api-1.8.0-alpha2.jar

@@ -1,3 +1,4 @@
 module pl.tfij.java9modules.app {
     requires pl.tfij.java9modules.greetings;
+    requires org.apache.logging.log4j;
 }

package.sh

@@ -2,10 +2,20 @@
 
 import pl.tfij.java9modules.greetings.Greeting;
 
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+
+
 public class ModuleApp {
 
+    private static Logger logger = LogManager.getLogger(ModuleApp.class)
+;
     public static void main(String[] args) {
-        System.out.println(new Greeting().regular("World"));
+        System.out.println("Class path: " + System.getProperty("java.class.path"));
+        System.out.println("Module path:" + System.getProperty("jdk.module.path"));
+        String greeting = new Greeting().regular("World");
+        System.out.println(greeting);
+        logger.info(greeting);
     }
 
 

resources/log4j2.xml

@@ -0,0 +1,6 @@
+module pl.tfij.java9modules.slf4japp {
+    requires pl.tfij.java9modules.greetings;
+    requires org.slf4j;
+    requires org.apache.logging.log4j;
+    requires org.apache.logging.log4j.slf4j.impl;
+}

run.sh

@@ -0,0 +1,22 @@
+package pl.tfij.java9modules.slf4japp;
+
+import pl.tfij.java9modules.greetings.Greeting;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+public class SLF4JApp {
+
+    private static Logger logger = LoggerFactory.getLogger(SLF4JApp.class);
+
+    public static void main(String[] args) {
+        System.out.println("Class path: " + System.getProperty("java.class.path"));
+        System.out.println("Module path:" + System.getProperty("jdk.module.path"));
+        String greeting = new Greeting().regular("World");
+        System.out.println(greeting);
+        logger.info(greeting);
+    }
+
+
+}