| /* |
| * 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 |
| * |
| * https://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.avro.grpc; |
| |
| import org.apache.avro.Protocol; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import io.grpc.MethodDescriptor; |
| import org.apache.avro.util.MapUtil; |
| |
| import static io.grpc.MethodDescriptor.generateFullMethodName; |
| |
| /** Descriptor for a gRPC service based on a Avro interface. */ |
| class ServiceDescriptor { |
| |
| // cache for service descriptors. |
| private static final ConcurrentMap<String, ServiceDescriptor> SERVICE_DESCRIPTORS = new ConcurrentHashMap<>(); |
| private final String serviceName; |
| private final Protocol protocol; |
| // cache for method descriptors. |
| private final ConcurrentMap<String, MethodDescriptor<Object[], Object>> methods = new ConcurrentHashMap<>(); |
| |
| private ServiceDescriptor(Class iface, String serviceName) { |
| this.serviceName = serviceName; |
| this.protocol = AvroGrpcUtils.getProtocol(iface); |
| } |
| |
| /** |
| * Creates a Service Descriptor. |
| * |
| * @param iface Avro RPC interface. |
| */ |
| public static ServiceDescriptor create(Class iface) { |
| String serviceName = AvroGrpcUtils.getServiceName(iface); |
| return MapUtil.computeIfAbsent(SERVICE_DESCRIPTORS, serviceName, key -> new ServiceDescriptor(iface, serviceName)); |
| } |
| |
| /** |
| * provides name of the service. |
| */ |
| public String getServiceName() { |
| return serviceName; |
| } |
| |
| /** |
| * Provides a gRPC {@link MethodDescriptor} for a RPC method/message of Avro |
| * {@link Protocol}. |
| * |
| * @param methodType gRPC type for the method. |
| * @return a {@link MethodDescriptor} |
| */ |
| public MethodDescriptor<Object[], Object> getMethod(String methodName, MethodDescriptor.MethodType methodType) { |
| return MapUtil.computeIfAbsent(methods, methodName, |
| key -> MethodDescriptor.<Object[], Object>newBuilder() |
| .setFullMethodName(generateFullMethodName(serviceName, methodName)).setType(methodType) |
| .setRequestMarshaller(new AvroRequestMarshaller(protocol.getMessages().get(methodName))) |
| .setResponseMarshaller(new AvroResponseMarshaller(protocol.getMessages().get(methodName))).build()); |
| } |
| } |