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/*
* 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 Exceptions;
using Extensions;
using PulsarApi;
using System;
using System.Buffers;
using System.Diagnostics;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
public sealed class Connection : IConnection
{
private readonly AsyncLock _lock;
private readonly ChannelManager _channelManager;
private readonly PingPongHandler _pingPongHandler;
private readonly IPulsarStream _stream;
private readonly Func<Task<string>>? _accessTokenFactory;
private int _isDisposed;
public Connection(IPulsarStream stream, TimeSpan keepAliveInterval, Func<Task<string>>? accessTokenFactory)
{
_lock = new AsyncLock();
_channelManager = new ChannelManager();
_pingPongHandler = new PingPongHandler(this, keepAliveInterval);
_stream = stream;
_accessTokenFactory = accessTokenFactory;
}
public async ValueTask<bool> HasChannels(CancellationToken cancellationToken)
{
ThrowIfDisposed();
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
return _channelManager.HasChannels();
}
}
public async Task<ProducerResponse> Send(CommandProducer command, IChannel channel, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<ProducerResponse>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command, channel);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<SubscribeResponse> Send(CommandSubscribe command, IChannel channel, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<SubscribeResponse>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command, channel);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
private Task Send(CommandAuthResponse authResponse, CancellationToken cancellationToken)
=> Send(authResponse.AsBaseCommand(), cancellationToken);
public Task Send(CommandPing command, CancellationToken cancellationToken)
=> Send(command.AsBaseCommand(), cancellationToken);
public Task Send(CommandPong command, CancellationToken cancellationToken)
=> Send(command.AsBaseCommand(), cancellationToken);
public Task Send(CommandAck command, CancellationToken cancellationToken)
=> Send(command.AsBaseCommand(), cancellationToken);
public Task Send(CommandFlow command, CancellationToken cancellationToken)
=> Send(command.AsBaseCommand(), cancellationToken);
public Task Send(CommandRedeliverUnacknowledgedMessages command, CancellationToken cancellationToken)
=> Send(command.AsBaseCommand(), cancellationToken);
public async Task<BaseCommand> Send(CommandUnsubscribe command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandConnect command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandLookupTopic command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandSeek command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandGetLastMessageId command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandCloseProducer command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandCloseConsumer command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(SendPackage command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command.Command!);
var sequence = Serializer.Serialize(command.Command!.AsBaseCommand(), command.Metadata!, command.Payload);
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandGetOrCreateSchema command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
public async Task<BaseCommand> Send(CommandPartitionedTopicMetadata command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
Task<BaseCommand>? responseTask;
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
responseTask = _channelManager.Outgoing(command);
var sequence = Serializer.Serialize(command.AsBaseCommand());
await _stream.Send(sequence).ConfigureAwait(false);
}
return await responseTask.ConfigureAwait(false);
}
private async Task Send(BaseCommand command, CancellationToken cancellationToken)
{
ThrowIfDisposed();
var sequence = Serializer.Serialize(command);
using (await _lock.Lock(cancellationToken).ConfigureAwait(false))
{
await _stream.Send(sequence).ConfigureAwait(false);
}
}
public async Task ProcessIncommingFrames(CancellationToken cancellationToken)
{
await Task.Yield();
try
{
await foreach (var frame in _stream.Frames(cancellationToken))
{
var commandSize = frame.ReadUInt32(0, true);
var command = Serializer.Deserialize<BaseCommand>(frame.Slice(4, commandSize));
if (_pingPongHandler.Incoming(command.CommandType))
continue;
if (command.CommandType == BaseCommand.Type.Message)
_channelManager.Incoming(command.Message, new ReadOnlySequence<byte>(frame.Slice(commandSize + 4).ToArray()));
else
{
if (_accessTokenFactory != null && command.CommandType == BaseCommand.Type.AuthChallenge)
{
var token = await _accessTokenFactory.GetToken();
await Send(new CommandAuthResponse { Response = new AuthData { Data = Encoding.UTF8.GetBytes(token), AuthMethodName = "token" } }, cancellationToken);
DotPulsarEventSource.Log.TokenRefreshed();
}
else
{
_channelManager.Incoming(command);
}
}
}
}
catch
{
// ignored
}
}
public async ValueTask DisposeAsync()
{
if (Interlocked.Exchange(ref _isDisposed, 1) != 0)
return;
await _pingPongHandler.DisposeAsync().ConfigureAwait(false);
await _lock.DisposeAsync().ConfigureAwait(false);
_channelManager.Dispose();
await _stream.DisposeAsync().ConfigureAwait(false);
}
private void ThrowIfDisposed()
{
if (_isDisposed != 0)
throw new ConnectionDisposedException();
}
}