From fc1056796f6e79ec77984d498af81b30e527fe66 Mon Sep 17 00:00:00 2001
From: Stefan Begerad <dialog@swingbe.de>
Date: Tue, 30 Nov 2021 10:24:44 -0500
Subject: [PATCH] feat(slf4j): initial commit

---
 slf4j/.gitignore                              | 31 ++++++
 slf4j/README.md                               |  4 +
 slf4j/pom.xml                                 | 95 +++++++++++++++++++
 slf4j/src/main/java/de/swingbe/slf4j/Bar.java | 13 +++
 .../src/main/java/de/swingbe/slf4j/Main.java  | 30 ++++++
 slf4j/src/main/resources/log4j2.xml           | 32 +++++++
 6 files changed, 205 insertions(+)
 create mode 100644 slf4j/.gitignore
 create mode 100644 slf4j/README.md
 create mode 100644 slf4j/pom.xml
 create mode 100644 slf4j/src/main/java/de/swingbe/slf4j/Bar.java
 create mode 100644 slf4j/src/main/java/de/swingbe/slf4j/Main.java
 create mode 100644 slf4j/src/main/resources/log4j2.xml

diff --git a/slf4j/.gitignore b/slf4j/.gitignore
new file mode 100644
index 0000000..33653da
--- /dev/null
+++ b/slf4j/.gitignore
@@ -0,0 +1,31 @@
+
+# Files
+.classpath
+.externalToolBuilders
+.gradle
+.project
+.pydevproject
+.settings
+.sonar
+*~
+*.ipr
+*.iml
+*.iws
+*.swp
+*.DS_Store
+*.snap.debug
+dependency-reduced-pom.xml
+
+# Directories
+.idea/
+.run/
+.venv/
+_site/
+build/
+dist/
+docs/_build/
+gen-java/
+gen-javabean/
+gen-py/
+node_modules/
+target/
diff --git a/slf4j/README.md b/slf4j/README.md
new file mode 100644
index 0000000..d0d735f
--- /dev/null
+++ b/slf4j/README.md
@@ -0,0 +1,4 @@
+# Overview
+This project shows an example how to use Simple Logging Facade for Java (slf4j).
+
+# Links
diff --git a/slf4j/pom.xml b/slf4j/pom.xml
new file mode 100644
index 0000000..f901512
--- /dev/null
+++ b/slf4j/pom.xml
@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <name>slf4j</name>
+    <description>description</description>
+    <url>https://swingbe.de</url>
+    <groupId>org.swingbe.de</groupId>
+    <artifactId>slf4j</artifactId>
+    <version>0.0.1</version>
+    <packaging>jar</packaging>
+
+    <licenses>
+        <license>
+            <name>GNU General Public License</name>
+            <url>https://www.gnu.org/licenses/gpl-3.0.txt</url>
+        </license>
+    </licenses>
+
+    <scm>
+        <url>https://github.com/Software-Ingenieur-Begerad/sandbox-java</url>
+    </scm>
+
+    <properties>
+        <!-- Other properties -->
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <!-- Target Java versions -->
+                    <release>11</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.1</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <filters>
+                                <filter>
+                                    <!-- exclude signatures from merged JAR to avoid invalid signature messages -->
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                            <!-- The shaded JAR will not be the main artifact for the project, it will be attached
+                              for deployment in the way source and docs are. -->
+                            <shadedArtifactAttached>true
+                            </shadedArtifactAttached>
+                            <shadedClassifierName>shaded</shadedClassifierName>
+                            <transformers>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <manifestEntries>
+                                        <Main-Class>de.swingbe.slf4j.Main
+                                        </Main-Class>
+                                    </manifestEntries>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-slf4j-impl</artifactId>
+            <version>2.9.0</version>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/slf4j/src/main/java/de/swingbe/slf4j/Bar.java b/slf4j/src/main/java/de/swingbe/slf4j/Bar.java
new file mode 100644
index 0000000..66bfcee
--- /dev/null
+++ b/slf4j/src/main/java/de/swingbe/slf4j/Bar.java
@@ -0,0 +1,13 @@
+package de.swingbe.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Bar {
+    public final static Logger LOG = LoggerFactory.getLogger(Bar.class);
+
+    public boolean doIt() {
+        LOG.error("Did it again!");
+        return false;
+    }
+}
diff --git a/slf4j/src/main/java/de/swingbe/slf4j/Main.java b/slf4j/src/main/java/de/swingbe/slf4j/Main.java
new file mode 100644
index 0000000..3954430
--- /dev/null
+++ b/slf4j/src/main/java/de/swingbe/slf4j/Main.java
@@ -0,0 +1,30 @@
+package de.swingbe.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Main {
+    public final static Logger LOG = LoggerFactory.getLogger(Main.class);
+
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+
+        LOG.debug("Debug Message Logged !!!");
+        LOG.info("Info Message Logged !!!");
+        LOG.error("Error Message Logged !!!",
+                new NullPointerException("NullError"));
+
+        String variable = "Hello John";
+        LOG.debug("Printing variable value: {}", variable);
+
+
+        LOG.trace("Entering application.");
+        Bar bar = new Bar();
+        if (!bar.doIt()) {
+            LOG.error("Didn't do it.");
+        }
+        LOG.trace("Exiting application.");
+
+        return;
+    }
+}
diff --git a/slf4j/src/main/resources/log4j2.xml b/slf4j/src/main/resources/log4j2.xml
new file mode 100644
index 0000000..95cbaac
--- /dev/null
+++ b/slf4j/src/main/resources/log4j2.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        <RollingFile name="rollingFile"
+                     fileName="sizeRolling.log"
+                     filePattern="sizeRolling-%d{yyyy-MM-dd}.log"
+                     ignoreExceptions="false"
+        >
+            <PatternLayout>
+                <Pattern>[%-5p] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} %m%n</Pattern>
+            </PatternLayout>
+            <Policies>
+                <SizeBasedTriggeringPolicy size="21MB"/>
+            </Policies>
+            <DefaultRolloverStrategy max="5"/>
+        </RollingFile>
+
+        <Console name="console" target="SYSTEM_OUT">
+            <PatternLayout
+                    pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Logger name="de.swingbe" level="all" additivity="true">
+            <appender-ref ref="rollingFile" level="debug"/>
+        </Logger>
+        <Root level="debug" additivity="false">
+            <appender-ref ref="console"/>
+        </Root>
+    </Loggers>
+
+</Configuration>