/// <summary>
/// Encodes a collection of messages into one byte[]. Encoded in order of list.
/// </summary>
/// <param name="messages">The collection of messages to encode together.</param>
/// <returns>Encoded byte[] representing the collection of messages.</returns>
public static byte[] EncodeMessageSet(IEnumerable<Message> messages)
{
using (var stream = new KafkaMessagePacker())
{
foreach (var message in messages)
{
stream.Pack(InitialMessageOffset)
.Pack(EncodeMessage(message));
}
return stream.PayloadNoLength();
}
}
public void ReadShouldStackReadRequestsAndReturnOneAtATime()
{
using (var server = new FakeTcpServer(FakeServerPort))
{
var messages = new[] { "test1", "test2", "test3", "test4" };
var expectedLength = "test1".Length;
var payload = new KafkaMessagePacker().Pack(messages);
var socket = new KafkaTcpSocket(new DefaultTraceLog(), _fakeServerUrl);
var tasks = messages.Select(x => socket.ReadAsync(x.Length)).ToArray();
server.SendDataAsync(payload.Payload());
Task.WaitAll(tasks);
foreach (var task in tasks)
{
Assert.That(task.Result.Length, Is.EqualTo(expectedLength));
}
}
}
/// <summary>
/// Encodes a message object to byte[]
/// </summary>
/// <param name="message">Message data to encode.</param>
/// <returns>Encoded byte[] representation of the message object.</returns>
/// <remarks>
/// Format:
/// Crc (Int32), MagicByte (Byte), Attribute (Byte), Key (Byte[]), Value (Byte[])
/// </remarks>
public static byte[] EncodeMessage(Message message)
{
using(var stream = new KafkaMessagePacker())
{
return stream.Pack(message.MagicNumber)
.Pack(message.Attribute)
.Pack(message.Key)
.Pack(message.Value)
.CrcPayload();
}
}
public void ReadShouldNotLoseDataFromStreamOverMultipleReads()
{
using (var server = new FakeTcpServer(FakeServerPort))
using (var test = new KafkaTcpSocket(new DefaultTraceLog(), _fakeServerUrl))
{
const int firstMessage = 99;
const string secondMessage = "testmessage";
var payload = new KafkaMessagePacker()
.Pack(firstMessage)
.Pack(secondMessage, StringPrefixEncoding.None);
//send the combined payload
server.SendDataAsync(payload.PayloadNoLength());
var firstResponse = test.ReadAsync(4).Result.ToInt32();
Assert.That(firstResponse, Is.EqualTo(firstMessage));
var secondResponse = Encoding.ASCII.GetString(test.ReadAsync(secondMessage.Length).Result);
Assert.That(secondResponse, Is.EqualTo(secondMessage));
}
}