First commit

.gitignore

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+# Created by .ignore support plugin (hsz.mobi)
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea
+
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/dictionaries
+
+# Sensitive or high-churn files:
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+
+# Gradle:
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# CMake
+cmake-build-debug/
+
+# Mongo Explorer plugin:
+.idea/**/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+### NotepadPP template
+# Notepad++ backups #
+*.bak
+### Linux template
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+### LibreOffice template
+# LibreOffice locks
+.~lock.*#
+### macOS template
+# General
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+### Windows template
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# IntelliJ Project File
+*.iml
+
+#Maven
+target/
+*.versionsBackup
+dependency-reduced-pom.xml
+
+#JavaDocs
+javadoc/
+

README.md

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+# DockerProcessWrapper
+
+A simple process wrapper which runs the process as it self but sends a command to it, if the TERM signal will be received. This is useful for applications in docker containers. It is written with Java 8.
+
+## Table of Contents
+
+* [Authors](#authors--contributors)
+* [License](#license)
+
+## Authors & Contributors
+
+* **Dominic Wienzek** - *Development* - [Skyleiger](https://github.com/skyleiger)
+
+See also the list of [contributors](https://github.com/Skyleiger/RadioBots-GameCloud/contributors) who participated in this project.
+
+## License
+
+This project is is the property of the author(s) and may only be used with the consent of the author(s). Other uses are not permitted.

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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>
+
+    <groupId>de.dwienzek</groupId>
+    <artifactId>docker-process-wrapper</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.release>11</maven.compiler.release>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.build.targetEncoding>UTF-8</project.build.targetEncoding>
+    </properties>
+
+    <developers>
+        <developer>
+            <name>Dominic Wienzek</name>
+            <email>dominic.wienzek@gmail.com</email>
+            <url>https://dominicwienzek.de</url>
+        </developer>
+    </developers>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.sf.jopt-simple</groupId>
+            <artifactId>jopt-simple</artifactId>
+            <version>5.0.4</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>DockerProcessWrapper</finalName>
+        <defaultGoal>clean install</defaultGoal>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <version>3.1.0</version>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <directory>*</directory>
+                            <includes>
+                                <include>*.versionsBackup</include>
+                            </includes>
+                        </fileset>
+                        <fileset>
+                            <directory>javadoc</directory>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
+                        </manifest>
+                        <manifestEntries>
+                            <Main-Class>de.dwienzek.dockerprocesswrapper.DockerProcessWrapper</Main-Class>
+                            <Implementation-Title>DockerProcessWrapper</Implementation-Title>
+                            <Specification-Title>DockerProcessWrapper</Specification-Title>
+                            <Version>${project.version}</Version>
+                            <Implementation-Version>${project.version}</Implementation-Version>
+                            <Specification-Version>${project.version}</Specification-Version>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.3</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <filters>
+                        <filter>
+                            <artifact>*:*</artifact>
+                            <excludes>
+                                <exclude>META-INF/*.SF</exclude>
+                                <exclude>META-INF/*.DSA</exclude>
+                                <exclude>META-INF/*.RSA</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>3.2.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/de/dwienzek/dockerprocesswrapper/DockerProcessWrapper.java

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+package de.dwienzek.dockerprocesswrapper;
+
+import joptsimple.OptionParser;
+import joptsimple.OptionSet;
+import sun.misc.Signal;
+
+import java.io.Console;
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class DockerProcessWrapper {
+
+    public static void main(String[] args) throws IOException {
+        OptionParser optionParser = new OptionParser();
+        optionParser.accepts("help", "Show the help");
+        optionParser.accepts("execute", "The command to execute").withRequiredArg();
+        optionParser.accepts("directory", "The execute directory").withOptionalArg();
+        optionParser.accepts("shutdown-command", "The shutdown command sent to the process").withRequiredArg();
+
+        OptionSet optionSet = optionParser.parse(args);
+
+        if (optionSet.has("help")) {
+            optionParser.printHelpOn(System.out);
+            return;
+        }
+
+        if (!optionSet.has("execute") || !optionSet.has("shutdown-command")) {
+            System.out.println("Please enter the correct arguments.");
+            System.out.println("Example: DockerProcessWrapper.jar --execute <command> --shutdown-command <shutdown-command> (--directory <directory>)");
+            System.out.println("Use --help for help.");
+        }
+
+        String commandString = (String) optionSet.valueOf("execute");
+        List<String> command = new ArrayList<>();
+        if (commandString.contains(" ")) {
+            command.addAll(Arrays.asList(commandString.split(" ")));
+        } else {
+            command.add(commandString);
+        }
+
+        Process process;
+        ProcessBuilder processBuilder = new ProcessBuilder().redirectOutput(ProcessBuilder.Redirect.INHERIT).redirectError(ProcessBuilder.Redirect.INHERIT).command(command);
+        if (optionSet.has("directory")) {
+            processBuilder.directory(new File((String) optionSet.valueOf("directory")));
+        }
+        process = processBuilder.start();
+
+        Thread thread = new Thread() {
+            @Override
+            public void run() {
+                Console console = System.console();
+                String line;
+                while (!isInterrupted() && (line = console.readLine()) != null) {
+                    try {
+                        process.getOutputStream().write((line + "\n").getBytes());
+                        process.getOutputStream().flush();
+                    } catch (IOException exception) {
+                        exception.printStackTrace();
+                    }
+                }
+            }
+        };
+        thread.setDaemon(true);
+        thread.start();
+
+        Signal.handle(new Signal("TERM"), signal -> {
+            try {
+                process.getOutputStream().write((optionSet.valueOf("shutdown-command") + "\n").getBytes());
+                process.getOutputStream().flush();
+            } catch (IOException exception) {
+                exception.printStackTrace();
+            }
+        });
+
+        try {
+            process.waitFor();
+        } catch (InterruptedException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+}