Spring Boot Example for Bukkit Plugins

DemoApplication.java

package de.fionera.springboottest;

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.context.SmartLifecycle;

public class DemoApplication implements ApplicationRunner, SmartLifecycle {
    private boolean isRunning;

    @Override
    public void run(ApplicationArguments args) {
        System.out.println("Hello World");
    }

    @Override
    public void start() {
        System.out.println("Start");
        isRunning = true;
    }

    @Override
    public void stop() {
        System.out.println("Stop");
        isRunning = false;
    }

    @Override
    public boolean isRunning() {
        return isRunning;
    }
}

pom.xml

<?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.fionera</groupId>
    <artifactId>spring-boot-test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Spring Boot Test</name>

    <properties>
        <java.version>1.8</java.version>
        <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>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.4</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <createDependencyReducedPom>false</createDependencyReducedPom>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

    <repositories>
        <repository>
            <id>spigotmc-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.bukkit</groupId>
            <artifactId>bukkit</artifactId>
            <version>1.15.2-R0.1-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot</artifactId>
            <version>2.3.3.RELEASE</version>
        </dependency>
    </dependencies>
</project>

SpringBootTest.java

package de.fionera.springboottest;

import org.bukkit.plugin.java.JavaPlugin;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ConfigurableApplicationContext;

public final class SpringBootTest extends JavaPlugin {
        private ConfigurableApplicationContext context;

    @Override
    public void onLoad() {
        context = SpringApplication.run(DemoApplication.class);
    }

    @Override
    public void onEnable() {
        context.start();
    }

    @Override
    public void onDisable() {
        context.close();
    }
}