We can improve the Warper plugin even more by writing its data to file asynchronously. This will help keep the main thread of the server running smoothly and lag free.
Look at the current save method. We add the data to a YamlConfiguration and then write the configuration to the file. Not all of this method can be run asynchronously. Adding the data to the configuration must be done synchronously to ensure that it is not modified while it is being added. However, the save method call on the configuration may be called asynchronously. We will place the entire try/catch block within a new BukkitRunnable. We will then run it as a task asynchronously. This task will be stored as a static variable in the Warper class. This is shown in the following code:
BukkitRunnable saveRunnable = new BukkitRunnable() {
@Override
public void run() {
try {
//Write the configuration to our save file
config.save(new File(plugin.getDataFolder(), "warps.yml"));...