Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 218 insertions, 0 deletions

diff --git a/qpid/dotnet/client-010/wcf/model/QpidInputChannel.cs b/qpid/dotnet/client-010/wcf/model/QpidInputChannel.cs
new file mode 100644
index 0000000000..7a05153df9
--- /dev/null
+++ b/qpid/dotnet/client-010/wcf/model/QpidInputChannel.cs
@@ -0,0 +1,218 @@
+/*
+*
+* 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.Collections.Generic;
+using System.IO;
+using System.ServiceModel;
+using System.ServiceModel.Channels;
+using System.Text;
+using System.Threading;
+using org.apache.qpid.client;
+using org.apache.qpid.transport;
+using org.apache.qpid.transport.util;
+
+namespace org.apache.qpid.wcf.model
+{
+    internal sealed class QpidInputChannel : QpidInputChannelBase
+    {
+        private static readonly Logger _log = Logger.get(typeof (QpidInputChannel));
+
+        private readonly QpidTransportBindingElement _bindingElement;
+        private readonly MessageEncoder _encoder;
+        private readonly ClientSession _session;
+        private readonly string _queueName;
+        private BlockingQueue _queue;
+        private bool _closed = false;
+
+        public QpidInputChannel(BindingContext context, ClientSession session, EndpointAddress address)
+            : base(context, address)
+        {
+            _bindingElement = context.Binding.Elements.Find<QpidTransportBindingElement>();
+            var encoderElem = context.BindingParameters.Find<MessageEncodingBindingElement>();
+            if (encoderElem != null)
+            {
+                _encoder = encoderElem.CreateMessageEncoderFactory().Encoder;
+            }
+            _session = session;
+            _queueName = address.Uri.ToString();
+            _queue = new BlockingQueue();
+        }
+
+
+        public override System.ServiceModel.Channels.Message Receive(TimeSpan timeout)
+        {
+            _session.messageFlow("myDest", MessageCreditUnit.MESSAGE, 1);
+            _session.sync();
+            IMessage m = _queue.Dequeue();
+            System.ServiceModel.Channels.Message result = null;
+            if (m != null)
+            {              
+                var reader = new BinaryReader(m.Body, Encoding.UTF8);
+                var body = new byte[m.Body.Length - m.Body.Position];
+                reader.Read(body, 0, body.Length);
+                try
+                {
+                    result = _encoder.ReadMessage(new MemoryStream(body),
+                                                  (int) _bindingElement.MaxReceivedMessageSize);
+                }
+                catch(Exception e)
+                {
+                    Console.WriteLine(e.StackTrace);
+                }
+                result.Headers.To = LocalAddress.Uri;
+
+                var ack = new RangeSet();
+                // ack this message 
+                ack.add(m.Id);
+                _session.messageAccept(ack);
+                _session.sync();
+            }
+            else
+            {
+                if(! _closed )
+                {
+                   return Receive(timeout); 
+                }
+            }
+            return result;
+        }
+
+        public override bool TryReceive(TimeSpan timeout, out System.ServiceModel.Channels.Message message)
+        {            
+            message = Receive(timeout);
+            return message != null;
+        }
+
+        public override bool WaitForMessage(TimeSpan timeout)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void Close(TimeSpan timeout)
+        {
+            _closed = true;
+            _queue = null;
+        }
+
+        public override void Open(TimeSpan timeout)
+        {
+            if (State != CommunicationState.Created && State != CommunicationState.Closed)
+                throw new InvalidOperationException(string.Format("Cannot open the channel from the {0} state.", State));
+
+            OnOpening();
+
+            var qr = (QueueQueryResult) _session.queueQuery(_queueName).Result;
+            if (qr.getQueue() == null)
+            {
+                // create the queue 
+                _session.queueDeclare(_queueName, null, null);
+            }
+            // bind the queue 
+            _session.exchangeBind(_queueName, "amq.direct", _queueName, null);
+            var myListener = new WCFListener(_queue);
+            _session.attachMessageListener(myListener, "myDest");
+            _session.messageSubscribe(_queueName, "myDest", MessageAcceptMode.EXPLICIT, MessageAcquireMode.PRE_ACQUIRED,
+                                      null,
+                                      0, null);
+            // issue credits     
+            _session.messageSetFlowMode("myDest", MessageFlowMode.WINDOW);
+            _session.messageFlow("myDest", MessageCreditUnit.BYTE, ClientSession.MESSAGE_FLOW_MAX_BYTES);
+            _session.sync();
+
+            OnOpened();
+        }
+    }
+
+    internal class WCFListener : IMessageListener
+    {
+        private static readonly Logger _log = Logger.get(typeof (WCFListener));
+        private readonly BlockingQueue _q;
+
+        public WCFListener(BlockingQueue q)
+        {
+            _q = q;
+        }
+
+        public void messageTransfer(IMessage m)
+        {
+            _log.debug("message received by listener");
+            _q.Enqueue(m);
+        }
+    }
+
+    internal class BlockingQueue
+    {
+        private int _count;
+        private readonly Queue<IMessage> _queue = new Queue<IMessage>();
+
+        public IMessage Dequeue(TimeSpan timeout)
+        {
+            lock (_queue)
+            {
+                DateTime start = DateTime.Now;
+                long elapsed = 0;
+                while (_count <= 0 && elapsed < timeout.Milliseconds)
+                {
+                    Monitor.Wait(_queue, new TimeSpan(timeout.Milliseconds - elapsed));
+                    elapsed = DateTime.Now.Subtract(start).Milliseconds;                 
+                }
+                if (_count > 0)
+                {
+                    _count--;
+                    return _queue.Dequeue();
+                }
+                return null;
+            }
+        }
+
+        public IMessage Dequeue()
+        {
+            lock (_queue)
+            {               
+                while (_count <= 0)
+                {
+                    Monitor.Wait(_queue);                   
+                }
+                if (_count > 0)
+                {
+                    _count--;
+                    return _queue.Dequeue();
+                }
+                return null;
+            }
+        }
+
+        public void Enqueue(IMessage data)
+        {
+            if (data != null)
+            {
+                lock (_queue)
+                {
+                    _queue.Enqueue(data);
+                    _count++;
+                    Monitor.Pulse(_queue);
+                }
+            }
+        }
+    }
+}
+