| /* |
| * Licensed 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. |
| */ |
| |
| namespace DotPulsar.Internal |
| { |
| using Abstractions; |
| using Events; |
| using System; |
| using System.Threading; |
| |
| public sealed class Channel : IChannel |
| { |
| private readonly Lock _senderLock; |
| private readonly Guid _correlationId; |
| private readonly IRegisterEvent _eventRegister; |
| private readonly IEnqueue<MessagePackage> _enqueue; |
| |
| public Channel(Guid correlationId, IRegisterEvent eventRegister, IEnqueue<MessagePackage> enqueue) |
| { |
| _senderLock = new Lock(); |
| _correlationId = correlationId; |
| _eventRegister = eventRegister; |
| _enqueue = enqueue; |
| } |
| |
| public void Received(MessagePackage message) |
| { |
| try |
| { |
| _enqueue.Enqueue(message); |
| } |
| catch |
| { |
| // Ignore |
| } |
| } |
| |
| public void Activated() |
| => _eventRegister.Register(new ChannelActivated(_correlationId)); |
| |
| public void ClosedByServer() |
| { |
| _senderLock.Disable(); |
| _eventRegister.Register(new ChannelClosedByServer(_correlationId)); |
| } |
| |
| public void Connected() |
| => _eventRegister.Register(new ChannelConnected(_correlationId)); |
| |
| public void Deactivated() |
| => _eventRegister.Register(new ChannelDeactivated(_correlationId)); |
| |
| public void Disconnected() |
| { |
| _senderLock.Disable(); |
| _eventRegister.Register(new ChannelDisconnected(_correlationId)); |
| } |
| |
| public void ReachedEndOfTopic() |
| => _eventRegister.Register(new ChannelReachedEndOfTopic(_correlationId)); |
| |
| public void Unsubscribed() |
| => _eventRegister.Register(new ChannelUnsubscribed(_correlationId)); |
| |
| public IDisposable SenderLock() |
| => _senderLock.Enter(); |
| |
| private sealed class Lock : IDisposable |
| { |
| private readonly object _lock; |
| private bool _canSend; |
| |
| public Lock() |
| { |
| _lock = new object(); |
| _canSend = true; |
| } |
| |
| public void Disable() |
| { |
| Monitor.Enter(_lock); |
| _canSend = false; |
| Monitor.Exit(_lock); |
| } |
| |
| public IDisposable Enter() |
| { |
| Monitor.Enter(_lock); |
| |
| if (_canSend) |
| return this; |
| |
| Monitor.Exit(_lock); |
| throw new OperationCanceledException(); |
| } |
| |
| public void Dispose() |
| => Monitor.Exit(_lock); |
| } |
| } |
| } |