1 files changed, 60 insertions, 0 deletions

diff --git a/subprojects/language-web/src/main/java/tools/refinery/language/web/generator/ModelGenerationService.java b/subprojects/language-web/src/main/java/tools/refinery/language/web/generator/ModelGenerationService.java
new file mode 100644
index 00000000..9f72e462
--- /dev/null
+++ b/subprojects/language-web/src/main/java/tools/refinery/language/web/generator/ModelGenerationService.java
@@ -0,0 +1,60 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.language.web.generator;
+
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import org.eclipse.xtext.service.OperationCanceledManager;
+import org.eclipse.xtext.util.CancelIndicator;
+import org.eclipse.xtext.util.concurrent.CancelableUnitOfWork;
+import org.eclipse.xtext.web.server.model.IXtextWebDocument;
+import tools.refinery.language.web.semantics.SemanticsService;
+import tools.refinery.language.web.xtext.server.push.PushWebDocument;
+import tools.refinery.language.web.xtext.server.push.PushWebDocumentAccess;
+
+@Singleton
+public class ModelGenerationService {
+        public static final String SERVICE_NAME = "modelGeneration";
+        public static final String MODEL_GENERATION_EXECUTOR = "modelGeneration";
+        public static final String MODEL_GENERATION_TIMEOUT_EXECUTOR = "modelGenerationTimeout";
+
+        @Inject
+        private OperationCanceledManager operationCanceledManager;
+
+        @Inject
+        private Provider<ModelGenerationWorker> workerProvider;
+
+        private final long timeoutSec;
+
+        public ModelGenerationService() {
+                timeoutSec = SemanticsService.getTimeout("REFINERY_MODEL_GENERATION_TIMEOUT_SEC").orElse(600L);
+        }
+
+        public ModelGenerationStartedResult generateModel(PushWebDocumentAccess document, int randomSeed) {
+                return document.modify(new CancelableUnitOfWork<>() {
+                        @Override
+                        public ModelGenerationStartedResult exec(IXtextWebDocument state, CancelIndicator cancelIndicator) {
+                                var pushState = (PushWebDocument) state;
+                                var worker = workerProvider.get();
+                                worker.setState(pushState, randomSeed, timeoutSec);
+                                var manager = pushState.getModelGenerationManager();
+                                worker.start();
+                                boolean canceled = manager.setActiveModelGenerationWorker(worker, cancelIndicator);
+                                if (canceled) {
+                                        worker.cancel();
+                                        operationCanceledManager.throwOperationCanceledException();
+                                }
+                                return new ModelGenerationStartedResult(worker.getUuid());
+                        }
+                });
+        }
+
+        public ModelGenerationCancelledResult cancelModelGeneration(PushWebDocumentAccess document) {
+                document.cancelModelGeneration();
+                return new ModelGenerationCancelledResult();
+        }
+}