feat(appender): introduced file-appender app
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<name>file-appender</name>
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<description>append text to file</description>
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<url>https://begerad.de</url>
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<groupId>de.begerad.file-appender</groupId>
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<artifactId>file-appender</artifactId>
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<version>0.0.1</version>
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<packaging>jar</packaging>
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<properties>
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<!-- https://maven.apache.org/general.html#encoding-warning -->
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<!-- note that Maven Shade Plugin only works with Java from version 7 and up -->
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencies>
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<!-- junit 5, unit test -->
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>5.7.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-slf4j-impl</artifactId>
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<version>2.14.1</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<!--The default maven-surefire-plugin is outdated,
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make sure update to the latest.-->
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.2</version>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.4</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<!-- tells that it should be run in package phase -->
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<goal>shade</goal>
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</goals>
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<configuration>
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<filters>
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<filter>
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<artifact>*:*</artifact>
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<excludes>
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<exclude>META-INF/*.MF</exclude>
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</excludes>
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</filter>
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</filters>
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<shadedArtifactAttached>true</shadedArtifactAttached>
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<shadedClassifierName>depds</shadedClassifierName>
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<transformers>
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<!-- configure resources transformer for Maven Shade Plugin with ManifestResourceTransformer that allows us to define a mainClass in the META-INF/MANIFEST.MF file of the jar file, making the jar file after building, can run standalone -->
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<transformer
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implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<!-- define some other information in the META-INF/MANIFEST.MF file inside the jar file -->
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<manifestEntries>
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<Main-Class>de.begerad.fileappender.Main</Main-Class>
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<Specification-Title>${project.artifactId}</Specification-Title>
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<Specification-Version>${project.version}</Specification-Version>
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<Implementation-Title>${project.artifactId}</Implementation-Title>
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<Implementation-Version>${project.version}</Implementation-Version>
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<Implementation-Vendor-Id>${project.groupId}</Implementation-Vendor-Id>
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</manifestEntries>
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</transformer>
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</transformers>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>
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package de.begerad.fileappender;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileWriter;
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public class FileAppender {
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public final static Logger LOG = LoggerFactory.getLogger(FileAppender.class);
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/**
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* Append text line to file
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*
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* @param file object representing appending target
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* @param content object representing content to be appended
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*/
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public static void append(File file, String content) {
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LOG.debug("append() started...");
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// default - create and write
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// if file not exists, create and write
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// if file exists, truncate and write
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/*try (FileWriter fw = new FileWriter(file);
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BufferedWriter bw = new BufferedWriter(fw)) {
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bw.write(content);
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bw.newLine();
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}*/
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// append mode
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// if file not exists, create and write
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// if file exists, append to the end of the file
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try (FileWriter fw = new FileWriter(file, true);
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BufferedWriter bw = new BufferedWriter(fw)) {
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bw.write(content);
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bw.newLine(); // add new line, System.lineSeparator()
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} catch (Exception e) {
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LOG.error("ERROR while appending file " + file.getName() + " with content " + content);
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e.printStackTrace();
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}
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LOG.debug("append() done.");
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}
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}
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package de.begerad.fileappender;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.File;
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import java.io.IOException;
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import static de.begerad.fileappender.FileAppender.append;
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//TODO import static de.begerad.fileagerm.FileCleaner.deleteFilesByAge;
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public class Main {
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public static String appendPath = "";
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public static String content = "";
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public final static Logger LOG = LoggerFactory.getLogger(Main.class);
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public static void main(String[] args) {
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LOG.debug("main() started...");
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//check user input for file path
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if (args.length < 1) {
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LOG.error("Please enter path to file as first parameter.");
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return;
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}
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appendPath = args[0];
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File appendedRecords = new File(appendPath);
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//check user input for content
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if (args.length < 2) {
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LOG.error("Please enter content as second parameter.");
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return;
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}
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content = args[1];
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append(appendedRecords, content);
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LOG.debug("main() done.");
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<Configuration status="INFO">
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<Appenders>
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<RollingFile name="rollingFile"
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fileName="log.txt"
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filePattern="log-%d{yyyy-MM-dd}.txt"
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ignoreExceptions="false"
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>
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<PatternLayout>
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<Pattern>[%-5p] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} %m%n</Pattern>
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</PatternLayout>
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<Policies>
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<SizeBasedTriggeringPolicy size="3MB" />
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</Policies>
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<!--ensure that within the same rollover period no more than X files will be created when a size-based rollover was triggered-->
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<DefaultRolloverStrategy max="5" />
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</RollingFile>
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<Console name="console" target="SYSTEM_OUT">
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<PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} - %msg%n" />
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</Console>
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</Appenders>
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<Loggers>
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<Logger name="de.begerad" level="debug" additivity="true">
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<appender-ref ref="rollingFile" level="debug" />
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</Logger>
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<Root level="debug" additivity="false">
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<appender-ref ref="console" />
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</Root>
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</Loggers>
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</Configuration>
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package de.begerad.fileappender;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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public class TestFileAppender {
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}
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