| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * |
| */ |
| using System; |
| using System.IO; |
| using System.Threading; |
| using Logger = org.apache.qpid.transport.util.Logger; |
| |
| |
| namespace org.apache.qpid.transport.network.io |
| { |
| /// <summary> |
| /// IoReceiver |
| /// </summary> |
| public sealed class IoReceiver : IReceiver<ReceivedPayload<MemoryStream>> |
| { |
| private static readonly Logger log = Logger.Get(typeof(IoReceiver)); |
| private readonly int m_bufferSize; |
| private readonly Stream m_bufStream; |
| private readonly int m_timeout; |
| private readonly Thread m_thread; |
| private bool m_closed; |
| private readonly Object m_objectLock = new object(); |
| |
| // the event raised when a buffer is read from the wire |
| event EventHandler<ReceivedPayload<MemoryStream>> ReceivedBuffer; |
| event EventHandler<ExceptionArgs> ExceptionReading; |
| event EventHandler ReceiverClosed; |
| |
| event EventHandler<ReceivedPayload<MemoryStream>> IReceiver<ReceivedPayload<MemoryStream>>.Received |
| { |
| add |
| { |
| lock (m_objectLock) |
| { |
| ReceivedBuffer += value; |
| } |
| } |
| remove |
| { |
| lock (m_objectLock) |
| { |
| ReceivedBuffer -= value; |
| } |
| } |
| } |
| |
| event EventHandler<ExceptionArgs> IReceiver<ReceivedPayload<MemoryStream>>.Exception |
| { |
| add |
| { |
| lock (m_objectLock) |
| { |
| ExceptionReading += value; |
| } |
| } |
| remove |
| { |
| lock (m_objectLock) |
| { |
| ExceptionReading -= value; |
| } |
| } |
| } |
| |
| event EventHandler IReceiver<ReceivedPayload<MemoryStream>>.Closed |
| { |
| add |
| { |
| lock (m_objectLock) |
| { |
| ReceiverClosed += value; |
| } |
| } |
| remove |
| { |
| lock (m_objectLock) |
| { |
| ReceiverClosed -= value; |
| } |
| } |
| } |
| |
| public IoReceiver(Stream stream, int bufferSize, int timeout) |
| { |
| m_bufferSize = bufferSize; |
| m_bufStream = stream; |
| m_timeout = timeout; |
| m_thread = new Thread(Go); |
| m_thread.Name = String.Format("IoReceiver - {0}", stream); |
| m_thread.IsBackground = true; |
| m_thread.Start(); |
| } |
| |
| public void Close() |
| { |
| Mutex mut = new Mutex(); |
| mut.WaitOne(); |
| if (!m_closed) |
| { |
| m_closed = true; |
| try |
| { |
| log.Debug("Receiver closing"); |
| m_bufStream.Close(); |
| m_thread.Join(m_timeout); |
| if (m_thread.IsAlive) |
| { |
| throw new TransportException("join timed out"); |
| } |
| } |
| catch (ThreadInterruptedException e) |
| { |
| throw new TransportException(e); |
| } |
| catch (IOException e) |
| { |
| throw new TransportException(e); |
| } |
| } |
| mut.ReleaseMutex(); |
| } |
| |
| void Go() |
| { |
| // create a BufferedStream on top of the NetworkStream. |
| int threshold = m_bufferSize/2; |
| byte[] buffer = new byte[m_bufferSize]; |
| try |
| { |
| int read; |
| int offset = 0; |
| ReceivedPayload<MemoryStream> payload = new ReceivedPayload<MemoryStream>(); |
| while ((read = m_bufStream.Read(buffer, offset, m_bufferSize - offset)) > 0) |
| { |
| MemoryStream memStream = new MemoryStream(buffer, offset, read); |
| if (ReceivedBuffer != null) |
| { |
| // call the event |
| payload.Payload = memStream; |
| ReceivedBuffer(this, payload); |
| } |
| offset += read; |
| if (offset > threshold) |
| { |
| offset = 0; |
| buffer = new byte[m_bufferSize]; |
| } |
| } |
| log.Debug("Receiver thread terminating"); |
| } |
| catch (Exception t) |
| { |
| if (ExceptionReading != null) |
| { |
| ExceptionReading(this, new ExceptionArgs(t)); |
| } |
| } |
| finally |
| { |
| if (ReceiverClosed != null) |
| { |
| ReceiverClosed(this, new EventArgs()); |
| } |
| } |
| } |
| } |
| } |