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March 31, 2024 00:54
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""" | |
This is the launcher package for server launching. | |
""" | |
from dataclasses import dataclass | |
from pathlib import Path | |
from noggin.launcher.status import LauncherStatus | |
import subprocess | |
import nice_logging as logging | |
from threading import Thread | |
from observableprops import ObservablesMeta | |
class ServerLauncher(metaclass=ObservablesMeta): | |
observable_properties = [ | |
"color", | |
] | |
def __init__(self, | |
jarfile: Path, | |
java_path: Path, | |
server_dir: Path, | |
server_args: list = [], | |
server_name: str = "", | |
memory: int = 1024, | |
logger: logging.logging.Logger = logging.getLogger(__name__)): | |
self.jarfile = jarfile | |
self.java_path = java_path | |
self.server_dir = server_dir | |
self.server_args = server_args | |
self.server_name = server_name | |
self.memory = memory | |
self.logger = logger | |
self.status = LauncherStatus.STOPPED | |
self.logger.info(f"Initialized {self.server_name} launcher.") | |
self.check_server_dir() | |
def launch(self): | |
self.logger.info(f"Launching {self.server_name}...") | |
cmd = [str(self.java_path), "-Xmx{}M".format(self.memory), "-jar", str(self.jarfile)] + self.server_args | |
self.logger.debug("Generated command: " + " ".join(cmd)) | |
self.logger.info("Running launch command...") | |
self.process = subprocess.Popen(cmd, cwd=self.server_dir, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) | |
self.status = LauncherStatus.RUNNING | |
self.logger.info(f"{self.server_name} launched with PID {self.process.pid}") | |
self.watcher_thread = Thread(target=self._watch_process) | |
self.watcher_thread.start() | |
def stop(self): | |
if self.status != LauncherStatus.RUNNING: | |
self.logger.warning(f"Cannot stop {self.server_name} as it is not running.") | |
return | |
self.logger.info(f"Stopping {self.server_name}...") | |
self.process.terminate() | |
self.status = LauncherStatus.STOPPED | |
self.logger.info(f"{self.server_name} stopped successfully.") | |
def check_server_dir(self): | |
""" | |
Check if the server directory exists. If not, create it. | |
""" | |
if not self.server_dir.exists(): | |
self.logger.info(f"Server directory {self.server_dir} does not exist. Creating the folder.") | |
self.server_dir.mkdir(parents=True) | |
else: | |
self.logger.info(f"Server directory {self.server_dir} exists.") | |
def _watch_process(self): | |
""" | |
Watch the process to update the server status. | |
""" | |
self.logger.debug("Watcher thread started.") | |
self.process.wait() | |
if self.process.returncode == 0: | |
self.status = LauncherStatus.STOPPED | |
self.logger.info(f"{self.server_name} has stopped with code 0.") | |
else: | |
self.status = LauncherStatus.CRASHED | |
self.logger.warning(f"{self.server_name} has crashed with code {self.process.returncode}") | |
""" | |
>>> launcher.stdin.write(b"stop\n") | |
>>> launcher.stdin.flush() | |
""" |
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