WebSockets Next: cancel returned Multi if the connection is closed

- fixes quarkusio#41025

extensions/websockets-next/deployment/src/test/java/io/quarkus/websockets/next/test/errors/MultiClosedConnectionTest.java

@@ -0,0 +1,96 @@
+package io.quarkus.websockets.next.test.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.net.URI;
+import java.time.Duration;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import jakarta.inject.Inject;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.logging.Log;
+import io.quarkus.test.QuarkusUnitTest;
+import io.quarkus.test.common.http.TestHTTPResource;
+import io.quarkus.websockets.next.OnError;
+import io.quarkus.websockets.next.OnOpen;
+import io.quarkus.websockets.next.WebSocket;
+import io.quarkus.websockets.next.WebSocketConnection;
+import io.quarkus.websockets.next.test.utils.WSClient;
+import io.smallrye.mutiny.Multi;
+import io.vertx.core.Vertx;
+import io.vertx.core.impl.NoStackTraceThrowable;
+
+public class MultiClosedConnectionTest {
+
+    @RegisterExtension
+    public static final QuarkusUnitTest test = new QuarkusUnitTest()
+            .withApplicationRoot(root -> {
+                root.addClasses(Echo.class, WSClient.class);
+            });
+
+    @Inject
+    Vertx vertx;
+
+    @TestHTTPResource("echo")
+    URI testUri;
+
+    @Test
+    void testError() throws InterruptedException {
+        WSClient client = WSClient.create(vertx).connect(testUri);
+        client.waitForMessages(1);
+        client.close();
+        assertTrue(Echo.TERMINATION_LATCH.await(5, TimeUnit.SECONDS));
+        assertTrue(Echo.ERROR_LATCH.await(5, TimeUnit.SECONDS));
+        // Connection is closed and the returned Multi should be cancelled
+        int numOfMessages = Echo.MESSAGES.size();
+        Thread.sleep(600);
+        // No more ticks are emitted
+        assertEquals(numOfMessages, Echo.MESSAGES.size());
+    }
+
+    @WebSocket(path = "/echo")
+    public static class Echo {
+
+        static final CountDownLatch TERMINATION_LATCH = new CountDownLatch(1);
+        static final CountDownLatch ERROR_LATCH = new CountDownLatch(1);
+
+        static final List<String> MESSAGES = new CopyOnWriteArrayList<>();
+
+        @OnOpen
+        Multi<String> onOpen() {
+            return Multi.createFrom()
+                    .ticks()
+                    .every(Duration.ofMillis(300))
+                    .map(tick -> tick + "")
+                    .invoke(s -> {
+                        Log.infof("Next tick: %s", s);
+                        MESSAGES.add(s);
+                    })
+                    .onTermination()
+                    .invoke(() -> {
+                        Log.info("Terminated!");
+                        TERMINATION_LATCH.countDown();
+                    });
+        }
+
+        @OnError
+        void onConnectionClosedError(NoStackTraceThrowable t, WebSocketConnection conn) {
+            Log.info("Error callback!");
+            if (conn.isClosed()) {
+                String message = t.getMessage();
+                if (message != null && message.contains("WebSocket is closed")) {
+                    ERROR_LATCH.countDown();
+                }
+            }
+        }
+
+    }
+
+}

extensions/websockets-next/runtime/src/main/java/io/quarkus/websockets/next/runtime/WebSocketEndpointBase.java

@@ -319,41 +319,31 @@ public Uni<Void> sendText(String message, boolean broadcast) {
         return broadcast ? connection.broadcast().sendText(message) : connection.sendText(message);
     }
 
-    public Uni<Void> multiText(Multi<Object> multi, Function<Object, Uni<Void>> action) {
-        multi.onFailure().recoverWithMulti(t -> doOnError(t).toMulti())
+    public Uni<Void> multiText(Multi<Object> multi, Function<? super Object, Uni<?>> action) {
+        multi
+                // Encode and send message
+                .onItem().call(action)
+                .onFailure().recoverWithMulti(t -> {
+                    return doOnError(t).toMulti();
+                })
                 .subscribe().with(
-                        m -> {
-                            // Encode and send message
-                            action.apply(m)
-                                    .onFailure().recoverWithUni(this::doOnError)
-                                    .subscribe()
-                                    .with(v -> LOG.debugf("Multi >> text message: %s", connection),
-                                            t -> LOG.errorf(t, "Unable to send text message from Multi: %s", connection));
-                        },
-                        t -> {
-                            LOG.errorf(t, "Unable to send text message from Multi: %s ", connection);
-                        });
+                        m -> LOG.debugf("Multi >> text message: %s", connection),
+                        t -> LOG.errorf(t, "Unable to send text message from Multi: %s ", connection));
         return Uni.createFrom().voidItem();
     }
 
     public Uni<Void> sendBinary(Buffer message, boolean broadcast) {
         return broadcast ? connection.broadcast().sendBinary(message) : connection.sendBinary(message);
     }
 
-    public Uni<Void> multiBinary(Multi<Object> multi, Function<Object, Uni<Void>> action) {
-        multi.onFailure().recoverWithMulti(t -> doOnError(t).toMulti())
+    public Uni<Void> multiBinary(Multi<Object> multi, Function<? super Object, Uni<?>> action) {
+        multi
+                // Encode and send message
+                .onItem().call(action)
+                .onFailure().recoverWithMulti(t -> doOnError(t).toMulti())
                 .subscribe().with(
-                        m -> {
-                            // Encode and send message
-                            action.apply(m)
-                                    .onFailure().recoverWithUni(this::doOnError)
-                                    .subscribe()
-                                    .with(v -> LOG.debugf("Multi >> binary message: %s", connection),
-                                            t -> LOG.errorf(t, "Unable to send binary message from Multi: %s", connection));
-                        },
-                        t -> {
-                            LOG.errorf(t, "Unable to send text message from Multi: %s ", connection);
-                        });
+                        m -> LOG.debugf("Multi >> binary message: %s", connection),
+                        t -> LOG.errorf(t, "Unable to send binary message from Multi: %s ", connection));
         return Uni.createFrom().voidItem();
     }
 }