| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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 org.onosproject.incubator.protobuf.services.nb; |
| |
| import com.google.common.collect.Sets; |
| import io.grpc.Server; |
| import io.grpc.inprocess.InProcessServerBuilder; |
| import io.grpc.internal.AbstractServerImplBuilder; |
| |
| import java.io.IOException; |
| import java.util.Set; |
| /** |
| * InProcessServer that manages startup/shutdown of a service within the same process |
| * as the client is running. Used for unit testing purposes. |
| */ |
| public class InProcessServer<T extends io.grpc.BindableService> { |
| private Server server; |
| |
| Set<T> services = Sets.newHashSet(); |
| |
| private Class<T> clazz; |
| |
| public InProcessServer(Class<T> clazz) { |
| this.clazz = clazz; |
| } |
| |
| public void addServiceToBind(T service) { |
| if (service != null) { |
| services.add(service); |
| } |
| } |
| |
| public void start() throws IOException, InstantiationException, IllegalAccessException { |
| |
| AbstractServerImplBuilder builder = InProcessServerBuilder.forName("test").directExecutor(); |
| services.forEach(service -> builder.addService(service)); |
| server = builder.build().start(); |
| Runtime.getRuntime().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| // Use stderr here since the logger may have been reset by its JVM shutdown hook. |
| System.err.println("*** shutting down gRPC server since JVM is shutting down"); |
| InProcessServer.this.stop(); |
| System.err.println("*** server shut down"); |
| } |
| }); |
| } |
| |
| public void stop() { |
| if (server != null) { |
| server.shutdown(); |
| } |
| } |
| |
| /** |
| * Await termination on the main thread since the grpc library uses daemon threads. |
| * @throws InterruptedException if there is an issue |
| */ |
| public void blockUntilShutdown() throws InterruptedException { |
| if (server != null) { |
| server.awaitTermination(); |
| } |
| } |
| } |