| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.bookkeeper.clients.utils; |
| |
| import io.grpc.ManagedChannelBuilder; |
| import io.grpc.inprocess.InProcessChannelBuilder; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.bookkeeper.clients.config.StorageClientSettings; |
| import org.apache.bookkeeper.common.net.ServiceURI; |
| import org.apache.bookkeeper.common.resolver.NameResolverFactoryProvider; |
| import org.apache.bookkeeper.common.resolver.ServiceNameResolverProvider; |
| import org.apache.bookkeeper.common.util.ReflectionUtils; |
| |
| /** |
| * Utils to create grpc channels. |
| */ |
| @Slf4j |
| public final class GrpcChannels { |
| |
| private static final String BACKEND_INPROCESS = "inprocess"; |
| private static final String BK_REG_NAME_RESOLVER_PROVIDER = |
| "org.apache.bookkeeper.grpc.resolver.BKRegistrationNameResolverProvider"; |
| |
| private GrpcChannels() {} |
| |
| /** |
| * Create a channel builder from <tt>serviceUri</tt> with client <tt>settings</tt>. |
| * |
| * @param serviceUri service uri |
| * @param settings client settings |
| * @return managed channel builder |
| */ |
| public static ManagedChannelBuilder createChannelBuilder(String serviceUri, |
| StorageClientSettings settings) { |
| ServiceURI uri = ServiceURI.create(serviceUri); |
| |
| ManagedChannelBuilder builder; |
| if (uri.getServiceInfos().length > 0 && uri.getServiceInfos()[0].equals(BACKEND_INPROCESS)) { |
| // this is an inprocess service, so build an inprocess channel. |
| String serviceName = uri.getServiceHosts()[0]; |
| builder = InProcessChannelBuilder.forName(serviceName).directExecutor(); |
| } else if (null == uri.getServiceName() || ServiceURI.SERVICE_BK.equals(uri.getServiceName())) { |
| builder = ManagedChannelBuilder.forTarget(serviceUri) |
| .nameResolverFactory(new ServiceNameResolverProvider().toFactory()); |
| } else { |
| NameResolverFactoryProvider provider; |
| try { |
| provider = ReflectionUtils.newInstance( |
| BK_REG_NAME_RESOLVER_PROVIDER, |
| NameResolverFactoryProvider.class); |
| } catch (RuntimeException re) { |
| log.error("It seems that you don't have `bk-grpc-name-resolver` in your class path." |
| + " Please make sure you include it as your application's dependency."); |
| throw re; |
| } |
| builder = ManagedChannelBuilder.forTarget(serviceUri) |
| .nameResolverFactory(provider.toFactory()); |
| } |
| if (settings.usePlaintext()) { |
| builder = builder.usePlaintext(); |
| } |
| return builder; |
| } |
| |
| } |