What is the best way to keep track of time for a long time?

[TheAwesomeGem]

Basically I have a function that needs to be executed every 5 or 6 Minecraft days. What can I use to keep track of long time?

[Differentiation]

1. Make a private int in the class.

2. 1 Minecraft day = 20 minutes (day and night - 10 minutes day, 10 minutes night).

3. 6 Minecraft days = 20 * 6 = 120 minutes = 2 hours.

5. 120 minutes = 3600 seconds.

4. 7200 * 40 = 288000 Java update ticks.

5. Code:

public class Test
{
  private int time;
  
  public void onTime()
  {
    ++time;
    
    if (time == 288000 /* 2 hours (6 Minecraft days) */)
    {
      time = 0;
      // do things
    }
  }
}
      

However, if you log out, I believe the time resets to 0.

I hope I helped.

Edited December 30, 2017 by Differentiation

[TheAwesomeGem]

24 minutes ago, Differentiation said:

1. Make a private int in the class.

2. 1 Minecraft day = 20 minutes (day and night - 10 minutes day, 10 minutes night).

3. 6 Minecraft days = 20 * 6 = 120 minutes = 2 hours.

5. 120 minutes = 3600 seconds.

4. 7200 * 40 = 288000 Java update ticks.

5. Code:

public class Test
{
  private int time;
  
  public void onTime()
  {
    ++time;
    
    if (time == 288000 /* 2 hours (6 Minecraft days) */)
    {
      time = 0;
      // do things
    }
  }
}
      

However, if you log out, I believe the time resets to 0.

I hope I helped.

 

That's not too persistent though. Then I would have to have a ticker for each objects that keeps track of time.

 

Is there any variable that gives me this info?

 

int worldTime = world.getTime(); // This variable needs to give me the absolute time since the world has been created.

 

then I could use that time and check for time elapsed. However I am not finding such variable that keeps an absolute time since the world was created.

[Draco18s]

Capabilities.

[TheAwesomeGem]

12 minutes ago, Draco18s said:

Capabilities.

I don't want a ticker that ticks all the loaded chunks. That doesn't sound all that performance friendly. I already have capabilities attached to each of my chunk but I don't want to tick each chunk just to keep track of time.

[TheAwesomeGem]

4 minutes ago, diesieben07 said:

World::getWorldTotalTime.

Is it the time since the world was created? So if it's day 0 and I just create the world, it should be 0. However as time passes, that number gets added and doesn't reset after an extended period of time right?

[Draco18s]

2 hours ago, diesieben07 said:

It starts at 0 and increments by 1 every tick as long as the server is running. It does not reset unless you manually edit the level.dat.

Or use the /time command.

[Draco18s]

6 minutes ago, diesieben07 said:

Nope.

Right, I forget that it is separate from getWorldTime() which uses a different counter (which should also never reset unless you edit the save / use the command).

The Javadoc on...one of them...says that the value is modulo 24000, but it actually isn't.

 

Edit:

That said...is getWorldTotalTime effected by sleeping? That may influence what TheAwesomeGem is looking to achieve.

Edited December 30, 2017 by Draco18s