jooby-run: Hot reloading not working when .class file is changed by external process

- unload module on .class file changed
- fix #3505

Author: jknack

modules/jooby-run/src/main/java/io/jooby/run/JoobyRun.java

@@ -435,7 +435,8 @@ private synchronized void actualRestart() {
     var unload = false;
     Supplier<Boolean> compileTask = null;
     for (; e != null && (t - e.time) > waitTimeBeforeRestartMillis; e = queue.peek()) {
-      unload = unload || options.isCompileExtension(e.path);
+      // unload on source code changes (.java, .kt) or binary changes (.class)
+      unload = unload || options.isCompileExtension(e.path) || options.isClass(e.path);
       compileTask = Optional.ofNullable(compileTask).orElse(e.compileTask);
       queue.poll();
     }

modules/jooby-run/src/main/java/io/jooby/run/JoobyRunOptions.java

@@ -171,6 +171,10 @@ public boolean isCompileExtension(Path path) {
     return containsExtension(compileExtensions, path);
   }
 
+  public boolean isClass(Path path) {
+    return containsExtension(List.of("class"), path);
+  }
+
   /**
    * Test if the given path matches a restart extension.
    *