DRAFT: profiling

app/gui2/vite.config.ts

@@ -140,7 +140,7 @@ function gatewayServer(): Plugin {
     buildEnd() {
       if (ydocServer == null) return
 
-      ydocServer.kill(9)
+      ydocServer.kill('SIGTERM')
     },
   }
 }

build.sbt

@@ -1184,7 +1184,10 @@ lazy val `ydoc-server` = project
         shouldContainAll = true
       )
     },
-    modulePath += (`syntax-rust-definition` / Compile / productDirectories).value.head,
+    modulePath ++= Seq(
+      (`syntax-rust-definition` / Compile / productDirectories).value.head,
+      (`profiling-utils` / Compile / productDirectories).value.head
+    ),
     libraryDependencies ++= Seq(
       "org.graalvm.polyglot" % "polyglot"                    % graalMavenPackagesVersion,
       "org.graalvm.polyglot" % "inspect"                     % graalMavenPackagesVersion % "runtime",
@@ -1198,6 +1201,7 @@ lazy val `ydoc-server` = project
   )
   .dependsOn(`syntax-rust-definition`)
   .dependsOn(`logging-service-logback`)
+  .dependsOn(`profiling-utils`)
 
 lazy val `persistance` = (project in file("lib/java/persistance"))
   .settings(

lib/java/ydoc-server/src/main/java/module-info.java

@@ -3,6 +3,7 @@ module org.enso.ydoc {
   requires io.helidon.webclient.websocket;
   requires io.helidon.webserver;
   requires io.helidon.webserver.websocket;
+  requires org.enso.profiling;
   requires org.enso.syntax;
   requires org.graalvm.polyglot;
   requires org.slf4j;

lib/java/ydoc-server/src/main/java/org/enso/ydoc/Main.java

@@ -1,7 +1,10 @@
 package org.enso.ydoc;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executors;
+import org.enso.profiling.sampler.OutputStreamSampler;
 import org.enso.ydoc.polyfill.ParserPolyfill;
 import org.enso.ydoc.polyfill.web.WebEnvironment;
 import org.graalvm.polyglot.Source;
@@ -10,12 +13,25 @@ import org.graalvm.polyglot.io.IOAccess;
 public class Main {
 
   private static final String YDOC_SERVER_PATH = "/dist/assets/ydocServer.js";
+  private static final String SAMPLES_PATH = "/tmp/ydoc-server.out";
 
   private Main() {}
 
   public static void main(String[] args) throws Exception {
     var ydoc = Main.class.getResource(YDOC_SERVER_PATH);
     var contextBuilder = WebEnvironment.createContext().allowIO(IOAccess.ALL);
+    var sampler = OutputStreamSampler.ofFile(new File(SAMPLES_PATH));
+    sampler.start();
+    Runtime.getRuntime()
+        .addShutdownHook(
+            new Thread(
+                () -> {
+                  try {
+                    sampler.stop();
+                  } catch (IOException e) {
+                    throw new RuntimeException(e);
+                  }
+                }));
 
     try (var executor = Executors.newSingleThreadExecutor();
         var parser = new ParserPolyfill()) {

lib/java/ydoc-server/src/test/java/org/enso/ydoc/polyfill/web/WebSocketTest.java

@@ -249,6 +249,7 @@ public class WebSocketTest {
       session.send(buffer, last);
     }
 
+    @Override
     public void onPing(WsSession session, BufferData buffer) {
       session.pong(buffer);
     }

lib/scala/profiling-utils/src/main/java/module-info.java

@@ -0,0 +1,4 @@
+module org.enso.profiling {
+  exports org.enso.profiling.sampler;
+  exports org.enso.profiling.events;
+}