/// <summary>
/// Encodes the specified message header and body.
/// </summary>
/// <typeparam name="T">The type of the message.</typeparam>
/// <param name="body">The message body.</param>
/// <param name="header">The message header.</param>
/// <param name="compression">The compression type.</param>
/// <returns>The encoded byte array containing the message data.</returns>
public static byte[] Encode <T>(this T body, IMessageHeader header, string compression) where T : ISpecificRecord
{
using (var stream = new MemoryStream())
{
// create avro binary encoder to write to memory stream
var headerEncoder = new BinaryEncoder(stream);
var bodyEncoder = headerEncoder;
Stream gzip = null;
try
{
// compress message body if compression has been negotiated
if (header.CanCompressMessageBody())
{
if (GzipEncoding.Equals(compression, StringComparison.InvariantCultureIgnoreCase))
{
// add Compressed flag to message flags before writing header
header.SetBodyCompressed();
gzip = new GZipStream(stream, CompressionMode.Compress, true);
bodyEncoder = new BinaryEncoder(gzip);
}
}
// serialize header
var headerWriter = new SpecificWriter <IMessageHeader>(header.Schema);
headerWriter.Write(header, headerEncoder);
// serialize body
var bodyWriter = new SpecificWriter <T>(body.Schema);
bodyWriter.Write(body, bodyEncoder);
}
finally
{
gzip?.Dispose();
}
return(stream.ToArray());
}
}
