Initial commit: JS-powered Minestom server with hot-reloading and Gitea Action

2026-01-25 22:49:51 +00:00
parent b402cc8eca
commit dba3e818e8
12 changed files with 720 additions and 0 deletions
--- a/src/main/java/net/jstom/script/ScriptManager.java
+++ b/src/main/java/net/jstom/script/ScriptManager.java
@@ -0,0 +1,104 @@
+package net.jstom.script;
+
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.HostAccess;
+import org.graalvm.polyglot.Source;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ScriptManager {
+    private final File scriptsDir;
+    private final Map<String, ScriptEnv> loadedScripts = new HashMap<>();
+
+    public ScriptManager(File scriptsDir) {
+        this.scriptsDir = scriptsDir;
+    }
+
+    public void load() {
+        if (!scriptsDir.exists()) {
+            scriptsDir.mkdirs();
+        }
+
+        File[] files = scriptsDir.listFiles((dir, name) -> name.endsWith(".js"));
+        if (files != null) {
+            for (File file : files) {
+                loadScript(file);
+            }
+        }
+    }
+
+    public void loadScript(File file) {
+        String fileName = file.getName();
+        unloadScript(fileName); // Ensure clean slate if reloading
+
+        System.out.println("[JStom] Loading script: " + fileName);
+        
+        ScriptApi api = new ScriptApi();
+        Context context = Context.newBuilder("js")
+                .allowHostAccess(HostAccess.ALL)
+                .allowHostClassLookup(s -> true)
+                .allowIO(true)
+                .build();
+
+        context.getBindings("js").putMember("server", api);
+
+        try {
+            context.eval(Source.newBuilder("js", file).build());
+            loadedScripts.put(fileName, new ScriptEnv(context, api, file));
+        } catch (IOException e) {
+            e.printStackTrace();
+        } catch (Exception e) {
+            System.err.println("[JStom] Error executing script " + fileName);
+            e.printStackTrace();
+            // Cleanup if failed
+            api.cleanup();
+            context.close();
+        }
+    }
+
+    public void unloadScript(String fileName) {
+        ScriptEnv env = loadedScripts.remove(fileName);
+        if (env != null) {
+            env.api.cleanup();
+            env.context.close();
+            System.out.println("[JStom] Unloaded script: " + fileName);
+        }
+    }
+
+    public void unload() {
+        // Copy keys to avoid ConcurrentModificationException
+        for (String fileName : new java.util.ArrayList<>(loadedScripts.keySet())) {
+            unloadScript(fileName);
+        }
+    }
+
+    public void reload() {
+        unload();
+        load();
+    }
+    
+    public void reload(String fileName) {
+        File file = new File(scriptsDir, fileName);
+        if (file.exists()) {
+            loadScript(file);
+        } else {
+            System.err.println("[JStom] File not found: " + fileName);
+        }
+    }
+
+    private static class ScriptEnv {
+        final Context context;
+        final ScriptApi api;
+        final File file;
+
+        public ScriptEnv(Context context, ScriptApi api, File file) {
+            this.context = context;
+            this.api = api;
+            this.file = file;
+        }
+    }
+}
+