[java] Add "se" prefixed capabilities to session response

java/src/org/openqa/selenium/grid/node/config/DriverServiceSessionFactory.java

@@ -187,6 +187,7 @@ public Either<WebDriverException, ActiveSession> apply(CreateSessionRequest sess
 
         caps = readDevToolsEndpointAndVersion(caps);
         caps = readVncEndpoint(capabilities, caps);
+        caps = readPrefixedCaps(capabilities, caps);
 
         span.addEvent("Driver service created session", attributeMap);
         final HttpClient fClient = client;
@@ -300,6 +301,23 @@ private Capabilities readVncEndpoint(Capabilities requestedCaps, Capabilities re
     return returnedCaps;
   }
 
+  private Capabilities readPrefixedCaps(Capabilities requestedCaps, Capabilities returnedCaps) {
+
+    PersistentCapabilities returnPrefixedCaps = new PersistentCapabilities(returnedCaps);
+
+    Map<String, Object> requestedCapsMap = requestedCaps.asMap();
+    Map<String, Object> returnedCapsMap = returnedCaps.asMap();
+
+    requestedCapsMap.forEach(
+        (k, v) -> {
+          if (k.startsWith("se:") && !returnedCapsMap.containsKey(k)) {
+            returnPrefixedCaps.setCapability(k, v);
+          }
+        });
+
+    return returnPrefixedCaps;
+  }
+
   // We remove a capability before sending the caps to the driver because some drivers will
   // reject session requests when they cannot parse the specific capabilities (like platform or
   // browser version).

java/test/org/openqa/selenium/grid/node/local/LocalNodeTest.java

@@ -350,6 +350,35 @@ void seVncCdpUrlCapabilityWhenGridUrlWithTrailingSlash() throws URISyntaxExcepti
     assertThat(seCdp.toString().contains("wss://my.domain.com/session")).isTrue();
   }
 
+  @Test
+  void responseCapsShowContainerName() throws URISyntaxException {
+    Tracer tracer = DefaultTestTracer.createTracer();
+    EventBus bus = new GuavaEventBus();
+
+    String gridUrl = "http://localhost:7890/subPath";
+    URI uri = new URI(gridUrl);
+    Capabilities stereotype = new ImmutableCapabilities("se:containerName", "container-1");
+
+    LocalNode.Builder builder =
+        LocalNode.builder(tracer, bus, uri, uri, registrationSecret)
+            .add(
+                stereotype,
+                new TestSessionFactory(
+                    (id, caps) -> new Session(id, uri, stereotype, caps, Instant.now())));
+    LocalNode localNode = builder.build();
+
+    Either<WebDriverException, CreateSessionResponse> response =
+        localNode.newSession(
+            new CreateSessionRequest(ImmutableSet.of(W3C), stereotype, ImmutableMap.of()));
+    assertThat(response.isRight()).isTrue();
+
+    CreateSessionResponse sessionResponse = response.right();
+    Capabilities capabilities = sessionResponse.getSession().getCapabilities();
+    Object seContainerName = capabilities.getCapability("se:containerName");
+    assertThat(seContainerName).isNotNull();
+    assertThat(seContainerName).isEqualTo("container-1");
+  }
+
   @Test
   void cdpIsDisabledAndResponseCapsShowThat() throws URISyntaxException {
     Tracer tracer = DefaultTestTracer.createTracer();