| /** |
| * 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.pulsar.client.impl.schema; |
| |
| import static com.google.protobuf.DescriptorProtos.FileDescriptorProto; |
| import static com.google.protobuf.DescriptorProtos.FileDescriptorSet; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.protobuf.Descriptors; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.pulsar.client.api.SchemaSerializationException; |
| import org.apache.pulsar.common.protocol.schema.ProtobufNativeSchemaData; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Protobuf-Native schema util used for serialize/deserialize |
| * between {@link com.google.protobuf.Descriptors.Descriptor} and |
| * {@link org.apache.pulsar.common.protocol.schema.ProtobufNativeSchemaData}. |
| */ |
| public class ProtobufNativeSchemaUtils { |
| |
| public static byte[] serialize(Descriptors.Descriptor descriptor) { |
| byte[] schemaDataBytes; |
| try { |
| Map<String, FileDescriptorProto> fileDescriptorProtoCache = new HashMap<>(); |
| //recursively cache all FileDescriptorProto |
| serializeFileDescriptor(descriptor.getFile(), fileDescriptorProtoCache); |
| |
| //extract root message path |
| String rootMessageTypeName = descriptor.getFullName(); |
| String rootFileDescriptorName = descriptor.getFile().getFullName(); |
| //build FileDescriptorSet, this is equal to < protoc --include_imports --descriptor_set_out > |
| byte[] fileDescriptorSet = FileDescriptorSet.newBuilder().addAllFile(fileDescriptorProtoCache.values()).build().toByteArray(); |
| |
| //serialize to bytes |
| ProtobufNativeSchemaData schemaData = ProtobufNativeSchemaData.builder().fileDescriptorSet(fileDescriptorSet) |
| .rootFileDescriptorName(rootFileDescriptorName).rootMessageTypeName(rootMessageTypeName).build(); |
| schemaDataBytes = new ObjectMapper().writeValueAsBytes(schemaData); |
| logger.debug("descriptor '{}' serialized to '{}'.", descriptor.getFullName(), schemaDataBytes); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new SchemaSerializationException(e); |
| } |
| return schemaDataBytes; |
| } |
| |
| private static void serializeFileDescriptor(Descriptors.FileDescriptor fileDescriptor, Map<String, FileDescriptorProto> fileDescriptorCache) { |
| fileDescriptor.getDependencies().forEach(dependency -> { |
| if (!fileDescriptorCache.containsKey(dependency.getFullName())) { |
| serializeFileDescriptor(dependency, fileDescriptorCache); |
| } |
| } |
| ); |
| String[] unResolvedFileDescriptNames = fileDescriptor.getDependencies().stream(). |
| filter(item -> !fileDescriptorCache.containsKey(item.getFullName())).map(Descriptors.FileDescriptor::getFullName).toArray(String[]::new); |
| if (unResolvedFileDescriptNames.length == 0) { |
| fileDescriptorCache.put(fileDescriptor.getFullName(), fileDescriptor.toProto()); |
| } else { |
| throw new SchemaSerializationException(fileDescriptor.getFullName() + " can't resolve dependency '" + |
| Arrays.toString(unResolvedFileDescriptNames) + "'."); |
| } |
| } |
| |
| public static Descriptors.Descriptor deserialize(byte[] schemaDataBytes) { |
| Descriptors.Descriptor descriptor; |
| try { |
| ProtobufNativeSchemaData schemaData = new ObjectMapper().readValue(schemaDataBytes, ProtobufNativeSchemaData.class); |
| |
| Map<String, FileDescriptorProto> fileDescriptorProtoCache = new HashMap<>(); |
| Map<String, Descriptors.FileDescriptor> fileDescriptorCache = new HashMap<>(); |
| FileDescriptorSet fileDescriptorSet = FileDescriptorSet.parseFrom(schemaData.getFileDescriptorSet()); |
| fileDescriptorSet.getFileList().forEach(fileDescriptorProto -> fileDescriptorProtoCache.put(fileDescriptorProto.getName(), fileDescriptorProto)); |
| FileDescriptorProto rootFileDescriptorProto = fileDescriptorProtoCache.get(schemaData.getRootFileDescriptorName()); |
| |
| //recursively build FileDescriptor |
| deserializeFileDescriptor(rootFileDescriptorProto, fileDescriptorCache, fileDescriptorProtoCache); |
| //extract root fileDescriptor |
| Descriptors.FileDescriptor fileDescriptor = fileDescriptorCache.get(schemaData.getRootFileDescriptorName()); |
| //trim package |
| String[] paths = StringUtils.removeFirst(schemaData.getRootMessageTypeName(), fileDescriptor.getPackage()).replaceFirst("\\.", "").split("\\."); |
| //extract root message |
| descriptor = fileDescriptor.findMessageTypeByName(paths[0]); |
| //extract nested message |
| for (int i = 1; i < paths.length; i++) { |
| descriptor = descriptor.findNestedTypeByName(paths[i]); |
| } |
| logger.debug("deserialize '{}' to descriptor: '{}'.", schemaDataBytes, descriptor.getFullName()); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new SchemaSerializationException(e); |
| } |
| |
| return descriptor; |
| } |
| |
| private static void deserializeFileDescriptor(FileDescriptorProto fileDescriptorProto, Map<String, Descriptors.FileDescriptor> fileDescriptorCache, Map<String, FileDescriptorProto> fileDescriptorProtoCache) { |
| fileDescriptorProto.getDependencyList().forEach(dependencyFileDescriptorName -> { |
| if (!fileDescriptorCache.containsKey(dependencyFileDescriptorName)) { |
| FileDescriptorProto dependencyFileDescriptor = fileDescriptorProtoCache.get(dependencyFileDescriptorName); |
| deserializeFileDescriptor(dependencyFileDescriptor, fileDescriptorCache, fileDescriptorProtoCache); |
| } |
| }); |
| |
| Descriptors.FileDescriptor[] dependencyFileDescriptors = fileDescriptorProto.getDependencyList().stream().map(dependency -> { |
| if (fileDescriptorCache.containsKey(dependency)) { |
| return fileDescriptorCache.get(dependency); |
| } else { |
| throw new SchemaSerializationException("'" + fileDescriptorProto.getName() + "' can't resolve dependency '" + dependency + "'."); |
| } |
| }).toArray(Descriptors.FileDescriptor[]::new); |
| |
| try { |
| Descriptors.FileDescriptor fileDescriptor = Descriptors.FileDescriptor.buildFrom(fileDescriptorProto, dependencyFileDescriptors); |
| fileDescriptorCache.put(fileDescriptor.getFullName(), fileDescriptor); |
| } catch (Descriptors.DescriptorValidationException e) { |
| e.printStackTrace(); |
| throw new SchemaSerializationException(e); |
| } |
| } |
| |
| private static final Logger logger = LoggerFactory.getLogger(ProtobufNativeSchemaUtils.class); |
| |
| } |