ReutilizableTask.java

package com.github.zkingboos.util;

import lombok.NonNull;
import org.bukkit.Bukkit;
import org.bukkit.plugin.Plugin;

public abstract class ReutilizableTask implements Runnable {

    private int taskId;

    public ReutilizableTask() {
        resetTaskId();
    }

    public synchronized void runTaskTimerAsynchronously(@NonNull Plugin plugin, long delay, long period) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTaskTimerAsynchronously(plugin, this, delay, period)
          .getTaskId();
    }

    public synchronized void runTask(@NonNull Plugin plugin) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTask(plugin, this)
          .getTaskId();
    }

    public synchronized void runTaskAsynchronously(@NonNull Plugin plugin) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTaskAsynchronously(plugin, this)
          .getTaskId();
    }

    public synchronized void runTaskLater(@NonNull Plugin plugin, long delay) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTaskLater(plugin, this, delay)
          .getTaskId();
    }

    public synchronized void runTaskLaterAsynchronously(@NonNull Plugin plugin, long delay) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTaskLaterAsynchronously(plugin, this, delay)
          .getTaskId();
    }

    public synchronized void runTaskTimer(@NonNull Plugin plugin, long delay, long period) throws IllegalStateException {
        checkState();
        this.taskId = Bukkit
          .getScheduler()
          .runTaskTimer(plugin, this, delay, period)
          .getTaskId();
    }

    public synchronized void cancel() {
        final int taskId = getTaskId();
        if (taskId == -1) return;
        Bukkit.getScheduler().cancelTask(taskId);
        resetTaskId();
    }

    public synchronized void checkState() throws IllegalStateException {
        if (getTaskId() != -1) {
            throw new IllegalStateException("Cant restart an already initialized task");
        }
    }

    public synchronized void resetTaskId() {
        this.taskId = -1;
    }

    public synchronized int getTaskId() {
        return taskId;
    }
}