Hardcode beam pipelines to use GKE for tasks

core/build.gradle

@@ -61,6 +61,7 @@ def fragileTestPatterns = [
     // Currently changes a global configuration parameter that for some reason
     // results in timestamp inversions for other tests.  TODO(mmuller): fix.
     "google/registry/flows/host/HostInfoFlowTest.*",
+    "google/registry/beam/common/RegistryPipelineWorkerInitializerTest.*",
 ] + dockerIncompatibleTestPatterns
 
 sourceSets {

core/src/main/java/google/registry/beam/common/RegistryPipelineWorkerInitializer.java

@@ -40,6 +40,8 @@ public class RegistryPipelineWorkerInitializer implements JvmInitializer {
 
   @Override
   public void beforeProcessing(PipelineOptions options) {
+    // TODO(b/416299900): remove next line after GAE is removed.
+    System.setProperty("google.registry.jetty", "true");
     RegistryPipelineOptions registryOptions = options.as(RegistryPipelineOptions.class);
     RegistryEnvironment environment = registryOptions.getRegistryEnvironment();
     if (environment == null || environment.equals(RegistryEnvironment.UNITTEST)) {

core/src/test/java/google/registry/beam/common/RegistryPipelineWorkerInitializerTest.java

@@ -0,0 +1,36 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.beam.common;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import google.registry.util.RegistryEnvironment;
+import org.apache.beam.sdk.options.PipelineOptionsFactory;
+import org.junit.jupiter.api.Test;
+
+public class RegistryPipelineWorkerInitializerTest {
+
+  @Test
+  void test() {
+    RegistryPipelineOptions options =
+        PipelineOptionsFactory.fromArgs(
+                "--registryEnvironment=ALPHA", "--isolationOverride=TRANSACTION_SERIALIZABLE")
+            .withValidation()
+            .as(RegistryPipelineOptions.class);
+    new RegistryPipelineWorkerInitializer().beforeProcessing(options);
+    assertThat(RegistryEnvironment.isOnJetty()).isTrue();
+    System.clearProperty("google.registry.jetty");
+  }
+}

util/src/main/java/google/registry/util/RegistryEnvironment.java

@@ -61,9 +61,6 @@ public enum RegistryEnvironment {
   /** Name of the environmental variable of the container name. */
   private static final String CONTAINER_ENV = "CONTAINER_NAME";
 
-  private static final boolean ON_JETTY =
-      Boolean.parseBoolean(System.getProperty(JETTY_PROPERTY, "false"));
-
   private static final boolean IS_CANARY =
       System.getenv().getOrDefault(CONTAINER_ENV, "").endsWith("-canary");
 
@@ -100,8 +97,9 @@ public static RegistryEnvironment get() {
     return valueOf(Ascii.toUpperCase(System.getProperty(PROPERTY, UNITTEST.name())));
   }
 
+  // TODO(b/416299900): remove method after GAE is removed.
   public static boolean isOnJetty() {
-    return ON_JETTY;
+    return Boolean.parseBoolean(System.getProperty(JETTY_PROPERTY, "false"));
   }
 
   public static boolean isCanary() {