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/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.web.xtext.server.push;
import com.google.common.base.Optional;
import com.google.inject.Inject;
import org.eclipse.xtext.web.server.IServiceContext;
import org.eclipse.xtext.web.server.InvalidRequestException;
import org.eclipse.xtext.web.server.XtextServiceDispatcher;
import org.eclipse.xtext.web.server.model.PrecomputedServiceRegistry;
import org.eclipse.xtext.web.server.model.XtextWebDocument;
import com.google.inject.Singleton;
import tools.refinery.language.web.generator.ModelGenerationService;
import tools.refinery.language.web.semantics.SemanticsService;
import tools.refinery.language.web.xtext.server.SubscribingServiceContext;
@Singleton
public class PushServiceDispatcher extends XtextServiceDispatcher {
@Inject
private SemanticsService semanticsService;
@Inject
private ModelGenerationService modelGenerationService;
@Override
@Inject
protected void registerPreComputedServices(PrecomputedServiceRegistry registry) {
super.registerPreComputedServices(registry);
registry.addPrecomputedService(semanticsService);
}
@Override
protected XtextWebDocument getFullTextDocument(String fullText, String resourceId, IServiceContext context) {
var document = super.getFullTextDocument(fullText, resourceId, context);
if (document instanceof PushWebDocument pushWebDocument
&& context instanceof SubscribingServiceContext subscribingContext) {
pushWebDocument.addPrecomputationListener(subscribingContext.subscriber());
}
return document;
}
@Override
protected ServiceDescriptor createServiceDescriptor(String serviceType, IServiceContext context) {
if (ModelGenerationService.SERVICE_NAME.equals(serviceType)) {
return getModelGenerationService(context);
}
return super.createServiceDescriptor(serviceType, context);
}
protected ServiceDescriptor getModelGenerationService(IServiceContext context) throws InvalidRequestException {
var document = (PushWebDocumentAccess) getDocumentAccess(context);
// Using legacy Guava methods because of the Xtext dependency.
@SuppressWarnings({"Guava", "squid:S4738"})
boolean start = getBoolean(context, "start", Optional.of(false));
@SuppressWarnings({"Guava", "squid:S4738"})
boolean cancel = getBoolean(context, "cancel", Optional.of(false));
if (!start && !cancel) {
throw new InvalidRequestException("Either start of cancel must be specified");
}
@SuppressWarnings({"squid:S4738"})
int randomSeed = start ? getInt(context, "randomSeed", Optional.absent()) : 0;
var descriptor = new ServiceDescriptor();
descriptor.setService(() -> {
try {
if (start) {
return modelGenerationService.generateModel(document, randomSeed);
} else {
return modelGenerationService.cancelModelGeneration(document);
}
} catch (RuntimeException e) {
return handleError(descriptor, e);
}
});
return descriptor;
}
}
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