kalix.javasdk.view.ReflectiveMultiTableViewProvider Maven / Gradle / Ivy
/*
* Copyright 2021 Lightbend Inc.
*
* 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 kalix.javasdk.view;
import com.google.protobuf.Descriptors;
import kalix.javasdk.annotations.ViewId;
import kalix.javasdk.impl.MessageCodec;
import kalix.javasdk.impl.view.ViewMultiTableRouter;
import kalix.javasdk.impl.ComponentDescriptor;
import kalix.spring.impl.KalixSpringApplication;
import kalix.javasdk.impl.JsonMessageCodec;
import kalix.javasdk.impl.view.ReflectiveViewMultiTableRouter;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.function.BiFunction;
public class ReflectiveMultiTableViewProvider implements ViewProvider {
private final Class viewClass;
private final BiFunction>, ViewCreationContext, View> factory;
private final String viewId;
private final ViewOptions options;
private final JsonMessageCodec messageCodec;
private final ComponentDescriptor componentDescriptor;
public static ReflectiveMultiTableViewProvider of(
Class viewClass,
JsonMessageCodec messageCodec,
BiFunction>, ViewCreationContext, View> factory) {
String viewId =
Optional.ofNullable(viewClass.getAnnotation(ViewId.class))
.map(ViewId::value)
.orElseGet(viewClass::getName);
return new ReflectiveMultiTableViewProvider<>(
viewClass, factory, viewId, ViewOptions.defaults(), messageCodec);
}
private ReflectiveMultiTableViewProvider(
Class viewClass,
BiFunction>, ViewCreationContext, View> factory,
String viewId,
ViewOptions options,
JsonMessageCodec messageCodec) {
this.viewClass = viewClass;
this.factory = factory;
this.viewId = viewId;
this.options = options;
this.messageCodec = messageCodec;
this.componentDescriptor = ComponentDescriptor.descriptorFor(viewClass, messageCodec);
}
@Override
public Descriptors.ServiceDescriptor serviceDescriptor() {
return componentDescriptor.serviceDescriptor();
}
@Override
public String viewId() {
return viewId;
}
@Override
public ViewOptions options() {
return options;
}
@Override
public ViewMultiTableRouter newRouter(ViewCreationContext context) {
Map>, View> viewTables = new HashMap<>();
for (Class innerClass : viewClass.getDeclaredClasses()) {
if (KalixSpringApplication.isNestedViewTable(innerClass)) {
@SuppressWarnings("unchecked")
Class> viewTableClass = (Class>) innerClass;
viewTables.put(viewTableClass, factory.apply(viewTableClass, context));
}
}
return new ReflectiveViewMultiTableRouter(viewTables, componentDescriptor.commandHandlers());
}
@Override
public Descriptors.FileDescriptor[] additionalDescriptors() {
return new Descriptors.FileDescriptor[0];
}
@Override
public Optional alternativeCodec() {
return Optional.of(messageCodec);
}
}