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use streams

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This commit is contained in:
Eggers Jan
2017-09-13 09:10:41 +02:00
parent 1a1c0beabc
commit 16a184a92f
15 changed files with 329 additions and 435 deletions
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MQTTnet.Core/Channel/BufferedCommunicationChannel.cs
-77
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@@ -1,77 +0,0 @@
using System.Threading.Tasks;
using MQTTnet.Core.Client;
using System;
namespace MQTTnet.Core.Channel
{
public class BufferedCommunicationChannel : IMqttCommunicationChannel
{
private readonly IMqttCommunicationChannel _inner;
private int _bufferSize;
private int _bufferOffset;
public BufferedCommunicationChannel(IMqttCommunicationChannel inner)
{
_inner = inner;
}
public Task ConnectAsync(MqttClientOptions options)
{
return _inner.ConnectAsync(options);
}
public Task DisconnectAsync()
{
return _inner.DisconnectAsync();
}
public int Peek()
{
return _inner.Peek();
}
public async Task<ArraySegment<byte>> ReadAsync(int length, byte[] buffer)
{
//read from buffer
if (_bufferSize > 0)
{
return ReadFomBuffer(length, buffer);
}
var available = _inner.Peek();
// if there are less or equal bytes available then requested then just read em
if (available <= length)
{
return await _inner.ReadAsync(length, buffer);
}
//if more bytes are available than requested do buffer them to reduce calls to network buffers
await WriteToBuffer(available, buffer).ConfigureAwait(false);
return ReadFomBuffer(length, buffer);
}
private async Task WriteToBuffer(int available, byte[] buffer)
{
await _inner.ReadAsync(available, buffer).ConfigureAwait(false);
_bufferSize = available;
_bufferOffset = 0;
}
private ArraySegment<byte> ReadFomBuffer(int length, byte[] buffer)
{
var result = new ArraySegment<byte>(buffer, _bufferOffset, length);
_bufferSize -= length;
_bufferOffset += length;
if (_bufferSize < 0)
{
}
return result;
}
public Task WriteAsync(byte[] buffer)
{
return _inner.WriteAsync(buffer);
}
}
}
MQTTnet.Core/Channel/IMqttCommunicationChannel.cs
+3 -10
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@@ -1,6 +1,6 @@
using System.Threading.Tasks;
using MQTTnet.Core.Client;
using System;
using System.IO;
namespace MQTTnet.Core.Channel
{
@@ -9,14 +9,7 @@ namespace MQTTnet.Core.Channel
Task ConnectAsync(MqttClientOptions options);
Task DisconnectAsync();
Task WriteAsync(byte[] buffer);
/// <summary>
/// get the currently available number of bytes without reading them
/// </summary>
int Peek();
Task<ArraySegment<byte>> ReadAsync(int length, byte[] buffer);
Stream Stream { get; }
}
}