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InMemoryMessagePersistenceService.cs
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InMemoryMessagePersistenceService.cs
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using System.Linq.Expressions;
using Ardalis.GuardClauses;
using BuildingBlocks.Abstractions.CQRS.Command;
using BuildingBlocks.Abstractions.CQRS.Event.Internal;
using BuildingBlocks.Abstractions.Messaging;
using BuildingBlocks.Abstractions.Messaging.PersistMessage;
using BuildingBlocks.Abstractions.Serialization;
using BuildingBlocks.Core.Types;
using MediatR;
using Microsoft.Extensions.Logging;
namespace BuildingBlocks.Core.Messaging.MessagePersistence.InMemory;
public class InMemoryMessagePersistenceService : IMessagePersistenceService
{
private readonly ILogger<InMemoryMessagePersistenceService> _logger;
private readonly IMessagePersistenceRepository _messagePersistenceRepository;
private readonly IMessageSerializer _messageSerializer;
private readonly IMediator _mediator;
private readonly IBus _bus;
private readonly ISerializer _serializer;
public InMemoryMessagePersistenceService(
ILogger<InMemoryMessagePersistenceService> logger,
IMessagePersistenceRepository messagePersistenceRepository,
IMessageSerializer messageSerializer,
IMediator mediator,
IBus bus,
ISerializer serializer)
{
_logger = logger;
_messagePersistenceRepository = messagePersistenceRepository;
_messageSerializer = messageSerializer;
_mediator = mediator;
_bus = bus;
_serializer = serializer;
}
public Task<IReadOnlyList<StoreMessage>> GetByFilterAsync(
Expression<Func<StoreMessage, bool>>? predicate = null,
CancellationToken cancellationToken = default)
{
return _messagePersistenceRepository.GetByFilterAsync(predicate ?? (_ => true), cancellationToken);
}
public async Task AddPublishMessageAsync<TMessageEnvelope>(
TMessageEnvelope messageEnvelope,
CancellationToken cancellationToken = default)
where TMessageEnvelope : MessageEnvelope
{
await AddMessageCore(messageEnvelope, MessageDeliveryType.Outbox, cancellationToken);
}
public async Task AddReceivedMessageAsync<TMessageEnvelope>(
TMessageEnvelope messageEnvelope,
CancellationToken cancellationToken = default)
where TMessageEnvelope : MessageEnvelope
{
await AddMessageCore(messageEnvelope, MessageDeliveryType.Inbox, cancellationToken);
}
public async Task AddInternalMessageAsync<TCommand>(
TCommand internalCommand,
CancellationToken cancellationToken = default)
where TCommand : class, IInternalCommand
{
await AddMessageCore(new MessageEnvelope(internalCommand), MessageDeliveryType.Internal, cancellationToken);
}
public async Task AddNotificationAsync(
IDomainNotificationEvent notification,
CancellationToken cancellationToken = default)
{
await _messagePersistenceRepository.AddAsync(
new StoreMessage(
notification.EventId,
TypeMapper.GetFullTypeName(notification.GetType()),
_serializer.Serialize(notification),
MessageDeliveryType.Internal),
cancellationToken);
}
private async Task AddMessageCore(
MessageEnvelope messageEnvelope,
MessageDeliveryType deliveryType,
CancellationToken cancellationToken = default)
{
Guard.Against.Null(messageEnvelope.Message, nameof(messageEnvelope.Message));
Guid id;
if (messageEnvelope.Message is IMessage im)
{
id = im.MessageId;
}
else if (messageEnvelope.Message is IInternalCommand command)
{
id = command.Id;
}
else
{
id = Guid.NewGuid();
}
await _messagePersistenceRepository.AddAsync(
new StoreMessage(
id,
TypeMapper.GetFullTypeName(messageEnvelope.Message.GetType()),
_messageSerializer.Serialize(messageEnvelope),
deliveryType),
cancellationToken);
_logger.LogInformation(
"Message with id: {MessageID} and delivery type: {DeliveryType} saved in persistence message store.",
id,
deliveryType.ToString());
}
public async Task ProcessAsync(
Guid messageId,
MessageDeliveryType deliveryType,
CancellationToken cancellationToken = default)
{
var message = (await _messagePersistenceRepository.GetByFilterAsync(
x => x.Id == messageId && x.DeliveryType == deliveryType, cancellationToken))
.FirstOrDefault();
if (message is null)
return;
switch (deliveryType)
{
case MessageDeliveryType.Inbox:
await ProcessInbox(message, cancellationToken);
break;
case MessageDeliveryType.Internal:
await ProcessInternal(message, cancellationToken);
break;
case MessageDeliveryType.Outbox:
await ProcessOutbox(message, cancellationToken);
break;
}
message.ChangeState(MessageStatus.Processed);
}
public async Task ProcessAllAsync(CancellationToken cancellationToken = default)
{
var messages = await _messagePersistenceRepository
.GetByFilterAsync(x => x.MessageStatus != MessageStatus.Processed, cancellationToken);
foreach (var message in messages)
{
await ProcessAsync(message.Id, message.DeliveryType, cancellationToken);
}
}
private async Task ProcessOutbox(StoreMessage message, CancellationToken cancellationToken)
{
MessageEnvelope? messageEnvelope = _messageSerializer.Deserialize<MessageEnvelope>(message.Data, true);
if (messageEnvelope is null || messageEnvelope.Message is null)
return;
var data = _messageSerializer.Deserialize(
messageEnvelope.Message.ToString()!,
TypeMapper.GetType(message.DataType));
if (data is IMessage)
{
// we should pass a object type message or explicit our message type, not cast to IMessage (data is IMessage integrationEvent) because masstransit doesn't work with IMessage cast.
await _bus.PublishAsync(
data,
messageEnvelope.Headers,
cancellationToken);
_logger.LogInformation(
"Message with id: {MessageId} and delivery type: {DeliveryType} processed from the persistence message store.",
message.Id,
message.DeliveryType);
}
}
private async Task ProcessInternal(StoreMessage message, CancellationToken cancellationToken)
{
MessageEnvelope? messageEnvelope = _messageSerializer.Deserialize<MessageEnvelope>(message.Data, true);
if (messageEnvelope is null || messageEnvelope.Message is null)
return;
var data = _messageSerializer.Deserialize(
messageEnvelope.Message.ToString()!,
TypeMapper.GetType(message.DataType));
if (data is IDomainNotificationEvent domainNotificationEvent)
{
await _mediator.Publish(domainNotificationEvent, cancellationToken);
_logger.LogInformation(
"Domain-Notification with id: {EventID} and delivery type: {DeliveryType} processed from the persistence message store.",
message.Id,
message.DeliveryType);
}
if (data is IInternalCommand internalCommand)
{
await _mediator.Send(internalCommand, cancellationToken);
_logger.LogInformation(
"InternalCommand with id: {EventID} and delivery type: {DeliveryType} processed from the persistence message store.",
message.Id,
message.DeliveryType);
}
}
private Task ProcessInbox(StoreMessage message, CancellationToken cancellationToken)
{
return Task.CompletedTask;
}
}