| /* |
| * 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 DotPulsar.Abstractions; |
| using DotPulsar.Exceptions; |
| using DotPulsar.Internal.Extensions; |
| using Events; |
| using Microsoft.Extensions.ObjectPool; |
| using System; |
| using System.Buffers; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| public sealed class SubProducer<TMessage> : IEstablishNewChannel, IProducer<TMessage> |
| { |
| private readonly ObjectPool<PulsarApi.MessageMetadata> _messageMetadataPool; |
| private readonly Guid _correlationId; |
| private readonly IRegisterEvent _eventRegister; |
| private IProducerChannel _channel; |
| private readonly IExecute _executor; |
| private readonly IStateChanged<ProducerState> _state; |
| private readonly IProducerChannelFactory _factory; |
| private readonly ISchema<TMessage> _schema; |
| private readonly SequenceId _sequenceId; |
| private int _isDisposed; |
| |
| public Uri ServiceUrl { get; } |
| public string Topic { get; } |
| |
| public SubProducer( |
| Guid correlationId, |
| Uri serviceUrl, |
| string topic, |
| ulong initialSequenceId, |
| IRegisterEvent registerEvent, |
| IProducerChannel initialChannel, |
| IExecute executor, |
| IStateChanged<ProducerState> state, |
| IProducerChannelFactory factory, |
| ISchema<TMessage> schema) |
| { |
| var messageMetadataPolicy = new DefaultPooledObjectPolicy<PulsarApi.MessageMetadata>(); |
| _messageMetadataPool = new DefaultObjectPool<PulsarApi.MessageMetadata>(messageMetadataPolicy); |
| _correlationId = correlationId; |
| ServiceUrl = serviceUrl; |
| Topic = topic; |
| _sequenceId = new SequenceId(initialSequenceId); |
| _eventRegister = registerEvent; |
| _channel = initialChannel; |
| _executor = executor; |
| _state = state; |
| _factory = factory; |
| _schema = schema; |
| _isDisposed = 0; |
| |
| _eventRegister.Register(new ProducerCreated(_correlationId)); |
| } |
| |
| public async ValueTask<ProducerState> OnStateChangeTo(ProducerState state, CancellationToken cancellationToken) |
| => await _state.StateChangedTo(state, cancellationToken).ConfigureAwait(false); |
| |
| public async ValueTask<ProducerState> OnStateChangeFrom(ProducerState state, CancellationToken cancellationToken) |
| => await _state.StateChangedFrom(state, cancellationToken).ConfigureAwait(false); |
| |
| public bool IsFinalState() |
| => _state.IsFinalState(); |
| |
| public bool IsFinalState(ProducerState state) |
| => _state.IsFinalState(state); |
| |
| public async ValueTask DisposeAsync() |
| { |
| if (Interlocked.Exchange(ref _isDisposed, 1) != 0) |
| return; |
| |
| _eventRegister.Register(new ProducerDisposed(_correlationId)); |
| await _channel.ClosedByClient(CancellationToken.None).ConfigureAwait(false); |
| await _channel.DisposeAsync().ConfigureAwait(false); |
| } |
| public async ValueTask<MessageId> Send(TMessage message, CancellationToken cancellationToken) |
| => await Send(_schema.Encode(message), cancellationToken).ConfigureAwait(false); |
| |
| public async ValueTask<MessageId> Send(MessageMetadata metadata, TMessage message, CancellationToken cancellationToken) |
| => await Send(metadata, _schema.Encode(message), cancellationToken).ConfigureAwait(false); |
| |
| public async ValueTask<MessageId> Send(ReadOnlySequence<byte> data, CancellationToken cancellationToken) |
| { |
| ThrowIfDisposed(); |
| |
| var metadata = _messageMetadataPool.Get(); |
| try |
| { |
| metadata.SequenceId = _sequenceId.FetchNext(); |
| return await _executor.Execute(() => Send(metadata, data, cancellationToken), cancellationToken).ConfigureAwait(false); |
| } |
| finally |
| { |
| _messageMetadataPool.Return(metadata); |
| } |
| } |
| |
| public async ValueTask<MessageId> Send(MessageMetadata metadata, ReadOnlySequence<byte> data, CancellationToken cancellationToken) |
| { |
| ThrowIfDisposed(); |
| |
| var autoAssignSequenceId = metadata.SequenceId == 0; |
| if (autoAssignSequenceId) |
| metadata.SequenceId = _sequenceId.FetchNext(); |
| |
| try |
| { |
| return await _executor.Execute(() => Send(metadata.Metadata, data, cancellationToken), cancellationToken).ConfigureAwait(false); |
| } |
| finally |
| { |
| if (autoAssignSequenceId) |
| metadata.SequenceId = 0; |
| } |
| } |
| |
| private async ValueTask<MessageId> Send(PulsarApi.MessageMetadata metadata, ReadOnlySequence<byte> data, CancellationToken cancellationToken) |
| { |
| var response = await _channel.Send(metadata, data, cancellationToken).ConfigureAwait(false); |
| return response.MessageId.ToMessageId(); |
| } |
| |
| public async Task EstablishNewChannel(CancellationToken cancellationToken) |
| { |
| var channel = await _executor.Execute(() => _factory.Create(cancellationToken), cancellationToken).ConfigureAwait(false); |
| |
| var oldChannel = _channel; |
| _channel = channel; |
| |
| if (oldChannel is not null) |
| await oldChannel.DisposeAsync().ConfigureAwait(false); |
| } |
| |
| private void ThrowIfDisposed() |
| { |
| if (_isDisposed != 0) |
| throw new ProducerDisposedException(typeof(Producer<TMessage>).FullName!); |
| } |
| } |
| } |