| #region License |
| |
| /* |
| * 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. |
| */ |
| |
| #endregion |
| |
| using System; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Text; |
| using System.Threading; |
| using System.Threading.Tasks; |
| using Gremlin.Net.Driver; |
| using Gremlin.Net.Driver.Messages; |
| |
| namespace Gremlin.Net.Structure.IO.GraphBinary |
| { |
| /// <summary> |
| /// Serializes data to and from Gremlin Server in GraphBinary format. |
| /// </summary> |
| public class GraphBinaryMessageSerializer : IMessageSerializer |
| { |
| private const string MimeType = SerializationTokens.GraphBinary1MimeType; |
| private static readonly byte[] Header = Encoding.UTF8.GetBytes(MimeType); |
| |
| private readonly GraphBinaryReader _reader; |
| private readonly GraphBinaryWriter _writer; |
| private readonly RequestMessageSerializer _requestSerializer = new RequestMessageSerializer(); |
| private readonly ResponseMessageSerializer _responseSerializer = new ResponseMessageSerializer(); |
| |
| /// <summary> |
| /// Initializes a new instance of the <see cref="GraphBinaryMessageSerializer" /> class. |
| /// </summary> |
| /// <param name="registry">The <see cref="TypeSerializerRegistry"/> to use for serialization.</param> |
| public GraphBinaryMessageSerializer(TypeSerializerRegistry registry = null) |
| { |
| _reader = new GraphBinaryReader(registry); |
| _writer = new GraphBinaryWriter(registry); |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of the <see cref="GraphBinaryMessageSerializer" /> class. |
| /// </summary> |
| /// <param name="reader">The <see cref="GraphBinaryReader"/> used to deserialize from GraphBinary.</param> |
| /// <param name="writer">The <see cref="GraphBinaryWriter"/> used to serialize to GraphBinary.</param> |
| [Obsolete("Use the constructor that takes a TypeSerializerRegistry instead.")] |
| public GraphBinaryMessageSerializer(GraphBinaryReader reader, GraphBinaryWriter writer) |
| { |
| _reader = reader; |
| _writer = writer; |
| } |
| |
| /// <inheritdoc /> |
| public async Task<byte[]> SerializeMessageAsync(RequestMessage requestMessage, |
| CancellationToken cancellationToken = default) |
| { |
| using var stream = new MemoryStream(); |
| await stream.WriteByteAsync((byte) Header.Length, cancellationToken).ConfigureAwait(false); |
| await stream.WriteAsync(Header, cancellationToken).ConfigureAwait(false); |
| await _requestSerializer.WriteValueAsync(requestMessage, stream, _writer, cancellationToken) |
| .ConfigureAwait(false); |
| var bytes = stream.ToArray(); |
| return bytes; |
| } |
| |
| /// <inheritdoc /> |
| public async Task<ResponseMessage<List<object>>> DeserializeMessageAsync(byte[] message, |
| CancellationToken cancellationToken = default) |
| { |
| using var stream = new MemoryStream(message); |
| return await _responseSerializer.ReadValueAsync(stream, _reader, cancellationToken).ConfigureAwait(false); |
| } |
| } |
| } |