Multithreading on Java

[notmattlythgoe]

Originally Posted by Ether

Thank you everyone for the responses. I've been carefully reviewing them all and I think I now have a reasonably coherent idea of how command-based works.

There are however a few seeming inconsistencies (or perhaps ambiguities) that I'd like to resolve. Here are two:

Firstly, it is necessary but not sufficient that each individual command in the scheduler's queue complete within 20ms. Rather, the sum total of the individual execution times must be less than 20ms. Correct?

Secondly, the scheduler maintains not only a queue of all the commands to be run, but also the state of each command... and only the method corresponding to each command's state is executed. Correct? (Compare post 15 to post 17 for example of apparent inconsistency).

Yes to your first point. The goal would be that the sum total of all of the commands be less than the 20ms refresh rate. In general, commands should be pretty simple in their implementation to help with this.

The second point is also correct. The only real state that the scheduler needs to keep track of is which commands are running for their first time. The only thing I'd like to clarify further is that once a command is finished it is removed from the scheduler.