/// <summary>
/// Processes the input segment.
/// </summary>
/// <param name="segment">The input segment.</param>
/// <returns>
/// the processing result
/// </returns>
public virtual ProcessResult Process(ArraySegment <byte> segment)
{
var receiveCache = m_ReceiveCache;
receiveCache.Add(segment);
var rest = 0;
var currentReceiveFilter = m_ReceiveFilter;
SingleItemList <IPackageInfo> singlePackage = null;
List <IPackageInfo> packageList = null;
while (true)
{
var packageInfo = currentReceiveFilter.Filter(receiveCache, out rest);
if (currentReceiveFilter.State == FilterState.Error)
{
return(ProcessResult.Create(ProcessState.Error));
}
if (m_MaxPackageLength > 0)
{
var length = receiveCache.Total;
if (length > m_MaxPackageLength)
{
return(ProcessResult.Create(ProcessState.Error, string.Format("Max package length: {0}, current processed length: {1}", m_MaxPackageLength, length)));
}
}
var nextReceiveFilter = currentReceiveFilter.NextReceiveFilter;
// don't reset the filter if no request is resolved
if (packageInfo != null)
{
currentReceiveFilter.Reset();
}
if (nextReceiveFilter != null)
{
currentReceiveFilter = nextReceiveFilter;
m_ReceiveFilter = currentReceiveFilter;
}
// continue receive
if (packageInfo == null)
{
if (rest > 0)
{
var last = receiveCache.Last;
if (rest != last.Count)
{
PushResetData(segment, rest);
}
continue;
}
return(ProcessResult.Create(ProcessState.Cached, GetNotNullOne(packageList, singlePackage)));
}
if (packageList != null)
{
packageList.Add(packageInfo);
}
else if (singlePackage == null)
{
singlePackage = new SingleItemList <IPackageInfo>(packageInfo);
}
else
{
if (packageList == null)
{
packageList = new List <IPackageInfo>();
}
packageList.Add(singlePackage[0]);
packageList.Add(packageInfo);
singlePackage = null;
}
if (packageInfo is IBufferedPackageInfo && // is a buffered package
(packageInfo as IBufferedPackageInfo).Data is BufferList) // and it uses receive buffer directly
{
// so we need to create a new receive buffer container to use
m_ReceiveCache = receiveCache = new BufferList();
if (rest <= 0)
{
return(ProcessResult.Create(ProcessState.Cached, GetNotNullOne(packageList, singlePackage)));
}
}
else
{
m_ReceiveCache.Clear();
if (rest <= 0)
{
return(ProcessResult.Create(ProcessState.Completed, GetNotNullOne(packageList, singlePackage)));
}
}
PushResetData(segment, rest);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DefaultPipelineProcessor{TPackageInfo}"/> class.
/// </summary>
/// <param name="receiveFilter">The initializing receive filter.</param>
/// <param name="maxPackageLength">The max package size.</param>
public DefaultPipelineProcessor(IReceiveFilter <TPackageInfo> receiveFilter, int maxPackageLength = 0)
{
m_ReceiveFilter = receiveFilter;
m_ReceiveCache = new BufferList();
m_MaxPackageLength = maxPackageLength;
}