| /* |
| * 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. |
| */ |
| |
| namespace DotPulsar.Internal.Extensions |
| { |
| using PulsarApi; |
| using System.Buffers; |
| |
| public static class MessagePackageExtensions |
| { |
| public static uint GetMetadataSize(this MessagePackage package) |
| => package.Data.ReadUInt32(Constants.MetadataSizeOffset, true); |
| |
| public static MessageMetadata ExtractMetadata(this MessagePackage package, uint metadataSize) |
| => Serializer.Deserialize<MessageMetadata>(package.Data.Slice(Constants.MetadataOffset, metadataSize)); |
| |
| public static ReadOnlySequence<byte> ExtractData(this MessagePackage package, uint metadataSize) |
| => package.Data.Slice(Constants.MetadataOffset + metadataSize); |
| |
| public static bool IsValid(this MessagePackage package) |
| => StartsWithMagicNumber(package.Data) && HasValidCheckSum(package.Data); |
| |
| private static bool StartsWithMagicNumber(ReadOnlySequence<byte> input) |
| => input.StartsWith(Constants.MagicNumber); |
| |
| private static bool HasValidCheckSum(ReadOnlySequence<byte> input) |
| => input.ReadUInt32(Constants.MagicNumber.Length, true) == Crc32C.Calculate(input.Slice(Constants.MetadataSizeOffset)); |
| } |
| } |