Note: I wrote this guide for l2jserver, but it should work the same for Frozen. Let me know if you run into issues.
Hi, I just recently started working on L2J and while I was implementing a few custom features in the server I found the development workflow quite awful since I had to make quite a lot of steps to actually see my changes:
change the code -> compile -> update files -> shutdown server -> start server -> login again -> see the changes in game.
So, I wanted a change, I only wanted to follow these steps:
change code -> compile -> see changes in game. And luckily I was able to accomplish it.
What do you need?-
A working server- The sources of the l2jserver/frozen (obviously)
Steps1 - In your source folder, you need the gameserver/config and gameserver/data folders from
YOUR WORKING SERVER. You can do this by copying the folders or create a symbolic link so any changes you made to those folders are reflected without having to copy/paste again.
2 - Download
DCEVM (light) for Java 8u144 (build 2)3 - Download
HotswapAgent4 - Download
JDK 8u1445 - Install JDK 8
6 - Open a command line with administrator permissions:
7 - In your command line, go to the folder where you downloaded DCEVM (light) for Java 8u144 (build 2) and run it:
$ cd path/to/your/DCEVM (light) for Java 8u144 (build 2)
$ java -jar DCEVM-8u144-installer.jar8 - Once the application opens, select your JDK 8 and click Install DCEVM as altjvm:
Perfect, almost done!
9 - Open your IDE, and go to the Run configurations
10 - Complete with the following:
Name: GameServer Hotswap
Main class: net.sf.l2j.gameserver.GameServer (if you cannot find it, try searching for gameServer.GamesServer)
VM Options: -XXaltjvm=dcevm -javaagent:
PATH\TO\hotswap-agent.jarJRE: Make sure you have selected JDK 1.8.0.144
11 - Go to your gameServer.GameServer class, and make sure the logs line are commented:
12 - Start your loginServer as usual.
13 - Go to your IDE, and run GameServer Hotswap (from step 10)
14 - Your server should be up, try login with a character.
15 - If you succeed, perfect, now the exciting part, let's make a tiny change. Go to java/net/sf/l2j/gameserver/clientpackets/EnterWorld.java class and add this line to runImpl method, in the line 108:
activeChar.sendMessage("Hello from HOTDEPLOY!");16 - Save the file, and rebuild the project:
You should have a message that a class was updated.
Great, our change is already on, go to your server, login with a character and:
Did you notice?
no downtime!Hope it helps. Happy to help if anyone cannot do it.
Have a good day.
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