Show particle effects for certain timespan

Plugins Plugin Development
1

How would you spawn particles that stay longer than just a few seconds/respawn them once their gone?

2

You can’t, unfortunately. While particles are actual entities in 1.8.x, they’re spawned on the client through their own packet. The server doesn’t have any control over them despawning.

3

Ok. I found a solution using SpongeExecutors.

4

It works quite well with SpongeExecutors:

ParticleService = ParticleService = scheduler.createSyncExecutor(this);
ParticleService.scheduleWithFixedDelay
  (()->
     {    
       getPlayer().spawnParticles(ParticleEffect.builder().type(ParticleTypes.REDSTONE).build(), pos, radius);
     } ,0,200, TimeUnit.MILLISECONDS
  );

Not sure if that’s the best solution though.

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5

Is it possible to stop a SpongeExecutorService/interrupt the process?

6

When scheduling the task, the method returns you a SpongeFuture, which you can use to obtain a Task. The Task can be used to remove the task from the scheduler. Should you require the task to be able to cancel itself, schedule a Consumer<Task> instead of a Runnable to have access to the Task object within the task itself.

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7

Alternatively cancelling the SpongeFuture with <future>.cancel(true) will do the same thing.

Edit: In addition the spec for repeating tasks is that it will cease repeating if an exception is thrown during execution, so that is another method of stopping the task.

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