Code re-factorings and formatting in EventBus.RabbitMQ project
This commit is contained in:
Rafsanul Hasan
parent
086302f5f1
commit
db13fa6091
@ -10,122 +10,127 @@ using System.Net.Sockets;
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namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBusRabbitMQ
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{
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public class DefaultRabbitMQPersistentConnection
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: IRabbitMQPersistentConnection
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{
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private readonly IConnectionFactory _connectionFactory;
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private readonly ILogger<DefaultRabbitMQPersistentConnection> _logger;
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private readonly int _retryCount;
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IConnection _connection;
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bool _disposed;
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public class DefaultRabbitMQPersistentConnection
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: IRabbitMQPersistentConnection
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{
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private readonly IConnectionFactory _connectionFactory;
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private readonly ILogger<DefaultRabbitMQPersistentConnection> _logger;
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private readonly int _retryCount;
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IConnection _connection;
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bool _disposed;
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readonly object sync_root = new object();
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object sync_root = new object();
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public DefaultRabbitMQPersistentConnection(IConnectionFactory connectionFactory, ILogger<DefaultRabbitMQPersistentConnection> logger, int retryCount = 5)
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{
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_connectionFactory = connectionFactory ?? throw new ArgumentNullException(nameof(connectionFactory));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_retryCount = retryCount;
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}
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public DefaultRabbitMQPersistentConnection(IConnectionFactory connectionFactory, ILogger<DefaultRabbitMQPersistentConnection> logger, int retryCount = 5)
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{
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_connectionFactory = connectionFactory ?? throw new ArgumentNullException(nameof(connectionFactory));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_retryCount = retryCount;
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}
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public bool IsConnected => _connection != null && _connection.IsOpen && !_disposed;
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public bool IsConnected
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{
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get
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{
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return _connection != null && _connection.IsOpen && !_disposed;
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}
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}
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public IModel CreateModel()
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{
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if (!IsConnected)
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{
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throw new InvalidOperationException("No RabbitMQ connections are available to perform this action");
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}
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public IModel CreateModel()
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{
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if (!IsConnected)
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{
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throw new InvalidOperationException("No RabbitMQ connections are available to perform this action");
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}
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return _connection.CreateModel();
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}
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return _connection.CreateModel();
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}
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public void Dispose()
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{
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if (_disposed)
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{
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return;
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}
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public void Dispose()
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{
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if (_disposed) return;
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_disposed = true;
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_disposed = true;
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try
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{
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_connection.Dispose();
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}
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catch (IOException ex)
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{
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_logger.LogCritical(ex.ToString());
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}
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}
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try
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{
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_connection.Dispose();
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}
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catch (IOException ex)
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{
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_logger.LogCritical(ex.ToString());
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}
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}
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public bool TryConnect()
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{
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_logger.LogInformation("RabbitMQ Client is trying to connect");
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public bool TryConnect()
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{
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_logger.LogInformation("RabbitMQ Client is trying to connect");
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lock (sync_root)
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{
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var policy = RetryPolicy.Handle<SocketException>()
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.Or<BrokerUnreachableException>()
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.WaitAndRetry(_retryCount, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), (ex, time) =>
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{
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_logger.LogWarning(ex.ToString());
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}
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);
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lock (sync_root)
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{
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var policy = RetryPolicy.Handle<SocketException>()
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.Or<BrokerUnreachableException>()
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.WaitAndRetry(_retryCount, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), (ex, time) =>
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{
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_logger.LogWarning(ex.ToString());
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}
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);
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policy.Execute(() =>
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{
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_connection = _connectionFactory
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.CreateConnection();
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});
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policy.Execute(() =>
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{
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_connection = _connectionFactory
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.CreateConnection();
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});
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if (IsConnected)
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{
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_connection.ConnectionShutdown += OnConnectionShutdown;
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_connection.CallbackException += OnCallbackException;
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_connection.ConnectionBlocked += OnConnectionBlocked;
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if (IsConnected)
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{
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_connection.ConnectionShutdown += OnConnectionShutdown;
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_connection.CallbackException += OnCallbackException;
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_connection.ConnectionBlocked += OnConnectionBlocked;
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_logger.LogInformation($"RabbitMQ persistent connection acquired a connection {_connection.Endpoint.HostName} and is subscribed to failure events");
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_logger.LogInformation($"RabbitMQ persistent connection acquired a connection {_connection.Endpoint.HostName} and is subscribed to failure events");
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return true;
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}
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else
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{
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_logger.LogCritical("FATAL ERROR: RabbitMQ connections could not be created and opened");
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return true;
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}
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else
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{
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_logger.LogCritical("FATAL ERROR: RabbitMQ connections could not be created and opened");
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return false;
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}
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}
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}
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return false;
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}
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}
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}
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private void OnConnectionBlocked(object sender, ConnectionBlockedEventArgs e)
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{
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if (_disposed)
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{
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return;
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}
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private void OnConnectionBlocked(object sender, ConnectionBlockedEventArgs e)
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{
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if (_disposed) return;
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_logger.LogWarning("A RabbitMQ connection is shutdown. Trying to re-connect...");
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_logger.LogWarning("A RabbitMQ connection is shutdown. Trying to re-connect...");
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TryConnect();
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}
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TryConnect();
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}
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void OnCallbackException(object sender, CallbackExceptionEventArgs e)
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{
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if (_disposed)
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{
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return;
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}
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void OnCallbackException(object sender, CallbackExceptionEventArgs e)
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{
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if (_disposed) return;
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_logger.LogWarning("A RabbitMQ connection throw exception. Trying to re-connect...");
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_logger.LogWarning("A RabbitMQ connection throw exception. Trying to re-connect...");
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TryConnect();
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}
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TryConnect();
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}
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void OnConnectionShutdown(object sender, ShutdownEventArgs reason)
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{
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if (_disposed)
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{
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return;
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}
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void OnConnectionShutdown(object sender, ShutdownEventArgs reason)
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{
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if (_disposed) return;
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_logger.LogWarning("A RabbitMQ connection is on shutdown. Trying to re-connect...");
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_logger.LogWarning("A RabbitMQ connection is on shutdown. Trying to re-connect...");
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TryConnect();
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}
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}
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TryConnect();
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}
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}
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}
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@ -17,220 +17,220 @@ using System.Threading.Tasks;
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namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBusRabbitMQ
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{
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public class EventBusRabbitMQ : IEventBus, IDisposable
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{
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const string BROKER_NAME = "eshop_event_bus";
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public class EventBusRabbitMQ : IEventBus, IDisposable
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{
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const string BROKER_NAME = "eshop_event_bus";
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private readonly IRabbitMQPersistentConnection _persistentConnection;
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private readonly ILogger<EventBusRabbitMQ> _logger;
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private readonly IEventBusSubscriptionsManager _subsManager;
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private readonly ILifetimeScope _autofac;
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private readonly string AUTOFAC_SCOPE_NAME = "eshop_event_bus";
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private readonly int _retryCount;
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private readonly IRabbitMQPersistentConnection _persistentConnection;
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private readonly ILogger<EventBusRabbitMQ> _logger;
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private readonly IEventBusSubscriptionsManager _subsManager;
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private readonly ILifetimeScope _autofac;
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private readonly string AUTOFAC_SCOPE_NAME = "eshop_event_bus";
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private readonly int _retryCount;
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private IModel _consumerChannel;
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private string _queueName;
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private IModel _consumerChannel;
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private string _queueName;
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public EventBusRabbitMQ(IRabbitMQPersistentConnection persistentConnection, ILogger<EventBusRabbitMQ> logger,
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ILifetimeScope autofac, IEventBusSubscriptionsManager subsManager, string queueName = null, int retryCount = 5)
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{
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_persistentConnection = persistentConnection ?? throw new ArgumentNullException(nameof(persistentConnection));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_subsManager = subsManager ?? new InMemoryEventBusSubscriptionsManager();
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_queueName = queueName;
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_consumerChannel = CreateConsumerChannel();
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_autofac = autofac;
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_retryCount = retryCount;
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_subsManager.OnEventRemoved += SubsManager_OnEventRemoved;
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}
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public EventBusRabbitMQ(IRabbitMQPersistentConnection persistentConnection, ILogger<EventBusRabbitMQ> logger,
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ILifetimeScope autofac, IEventBusSubscriptionsManager subsManager, string queueName = null, int retryCount = 5)
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{
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_persistentConnection = persistentConnection ?? throw new ArgumentNullException(nameof(persistentConnection));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_subsManager = subsManager ?? new InMemoryEventBusSubscriptionsManager();
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_queueName = queueName;
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_consumerChannel = CreateConsumerChannel();
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_autofac = autofac;
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_retryCount = retryCount;
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_subsManager.OnEventRemoved += SubsManager_OnEventRemoved;
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}
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private void SubsManager_OnEventRemoved(object sender, string eventName)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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private void SubsManager_OnEventRemoved(object sender, string eventName)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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using (var channel = _persistentConnection.CreateModel())
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{
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channel.QueueUnbind(queue: _queueName,
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exchange: BROKER_NAME,
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routingKey: eventName);
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using (var channel = _persistentConnection.CreateModel())
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{
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channel.QueueUnbind(queue: _queueName,
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exchange: BROKER_NAME,
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routingKey: eventName);
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if (_subsManager.IsEmpty)
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{
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_queueName = string.Empty;
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_consumerChannel.Close();
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}
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}
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}
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if (_subsManager.IsEmpty)
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{
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_queueName = string.Empty;
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_consumerChannel.Close();
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}
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}
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}
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public void Publish(IntegrationEvent @event)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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public void Publish(IntegrationEvent @event)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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var policy = RetryPolicy.Handle<BrokerUnreachableException>()
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.Or<SocketException>()
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.WaitAndRetry(_retryCount, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), (ex, time) =>
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{
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_logger.LogWarning(ex.ToString());
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});
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var policy = Policy.Handle<BrokerUnreachableException>()
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.Or<SocketException>()
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.WaitAndRetry(_retryCount, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), (ex, time) =>
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{
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_logger.LogWarning(ex.ToString());
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});
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using (var channel = _persistentConnection.CreateModel())
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{
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var eventName = @event.GetType()
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.Name;
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using (var channel = _persistentConnection.CreateModel())
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{
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var eventName = @event.GetType()
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.Name;
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channel.ExchangeDeclare(exchange: BROKER_NAME,
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type: "direct");
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channel.ExchangeDeclare(exchange: BROKER_NAME,
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type: "direct");
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var message = JsonConvert.SerializeObject(@event);
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var body = Encoding.UTF8.GetBytes(message);
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var message = JsonConvert.SerializeObject(@event);
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var body = Encoding.UTF8.GetBytes(message);
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policy.Execute(() =>
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{
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var properties = channel.CreateBasicProperties();
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properties.DeliveryMode = 2; // persistent
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policy.Execute(() =>
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{
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var properties = channel.CreateBasicProperties();
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properties.DeliveryMode = 2; // persistent
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channel.BasicPublish(exchange: BROKER_NAME,
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routingKey: eventName,
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mandatory:true,
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basicProperties: properties,
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body: body);
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});
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}
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}
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channel.BasicPublish(exchange: BROKER_NAME,
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routingKey: eventName,
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mandatory: true,
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basicProperties: properties,
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body: body);
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});
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}
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}
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public void SubscribeDynamic<TH>(string eventName)
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where TH : IDynamicIntegrationEventHandler
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{
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DoInternalSubscription(eventName);
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_subsManager.AddDynamicSubscription<TH>(eventName);
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}
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public void SubscribeDynamic<TH>(string eventName)
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where TH : IDynamicIntegrationEventHandler
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{
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DoInternalSubscription(eventName);
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_subsManager.AddDynamicSubscription<TH>(eventName);
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}
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public void Subscribe<T, TH>()
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where T : IntegrationEvent
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where TH : IIntegrationEventHandler<T>
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{
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var eventName = _subsManager.GetEventKey<T>();
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DoInternalSubscription(eventName);
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_subsManager.AddSubscription<T, TH>();
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}
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public void Subscribe<T, TH>()
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where T : IntegrationEvent
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where TH : IIntegrationEventHandler<T>
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{
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var eventName = _subsManager.GetEventKey<T>();
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DoInternalSubscription(eventName);
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_subsManager.AddSubscription<T, TH>();
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}
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private void DoInternalSubscription(string eventName)
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{
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var containsKey = _subsManager.HasSubscriptionsForEvent(eventName);
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if (!containsKey)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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private void DoInternalSubscription(string eventName)
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{
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var containsKey = _subsManager.HasSubscriptionsForEvent(eventName);
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if (!containsKey)
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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using (var channel = _persistentConnection.CreateModel())
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{
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channel.QueueBind(queue: _queueName,
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exchange: BROKER_NAME,
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routingKey: eventName);
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}
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}
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}
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using (var channel = _persistentConnection.CreateModel())
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{
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channel.QueueBind(queue: _queueName,
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exchange: BROKER_NAME,
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routingKey: eventName);
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}
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}
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}
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public void Unsubscribe<T, TH>()
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where TH : IIntegrationEventHandler<T>
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where T : IntegrationEvent
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{
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_subsManager.RemoveSubscription<T, TH>();
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}
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public void Unsubscribe<T, TH>()
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where TH : IIntegrationEventHandler<T>
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where T : IntegrationEvent
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{
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_subsManager.RemoveSubscription<T, TH>();
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}
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public void UnsubscribeDynamic<TH>(string eventName)
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where TH : IDynamicIntegrationEventHandler
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{
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_subsManager.RemoveDynamicSubscription<TH>(eventName);
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}
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public void UnsubscribeDynamic<TH>(string eventName)
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where TH : IDynamicIntegrationEventHandler
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{
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_subsManager.RemoveDynamicSubscription<TH>(eventName);
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}
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public void Dispose()
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{
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if (_consumerChannel != null)
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{
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_consumerChannel.Dispose();
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}
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public void Dispose()
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{
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if (_consumerChannel != null)
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{
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_consumerChannel.Dispose();
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}
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_subsManager.Clear();
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}
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_subsManager.Clear();
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}
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private IModel CreateConsumerChannel()
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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private IModel CreateConsumerChannel()
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{
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if (!_persistentConnection.IsConnected)
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{
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_persistentConnection.TryConnect();
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}
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var channel = _persistentConnection.CreateModel();
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var channel = _persistentConnection.CreateModel();
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channel.ExchangeDeclare(exchange: BROKER_NAME,
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type: "direct");
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channel.ExchangeDeclare(exchange: BROKER_NAME,
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type: "direct");
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channel.QueueDeclare(queue: _queueName,
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durable: true,
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exclusive: false,
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autoDelete: false,
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arguments: null);
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channel.QueueDeclare(queue: _queueName,
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durable: true,
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exclusive: false,
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autoDelete: false,
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arguments: null);
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var consumer = new EventingBasicConsumer(channel);
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consumer.Received += async (model, ea) =>
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{
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var eventName = ea.RoutingKey;
|
||||
var message = Encoding.UTF8.GetString(ea.Body);
|
||||
var consumer = new EventingBasicConsumer(channel);
|
||||
consumer.Received += async (model, ea) =>
|
||||
{
|
||||
var eventName = ea.RoutingKey;
|
||||
var message = Encoding.UTF8.GetString(ea.Body);
|
||||
|
||||
await ProcessEvent(eventName, message);
|
||||
await ProcessEvent(eventName, message);
|
||||
|
||||
channel.BasicAck(ea.DeliveryTag,multiple:false);
|
||||
};
|
||||
channel.BasicAck(ea.DeliveryTag, multiple: false);
|
||||
};
|
||||
|
||||
channel.BasicConsume(queue: _queueName,
|
||||
autoAck: false,
|
||||
consumer: consumer);
|
||||
channel.BasicConsume(queue: _queueName,
|
||||
autoAck: false,
|
||||
consumer: consumer);
|
||||
|
||||
channel.CallbackException += (sender, ea) =>
|
||||
{
|
||||
_consumerChannel.Dispose();
|
||||
_consumerChannel = CreateConsumerChannel();
|
||||
};
|
||||
channel.CallbackException += (sender, ea) =>
|
||||
{
|
||||
_consumerChannel.Dispose();
|
||||
_consumerChannel = CreateConsumerChannel();
|
||||
};
|
||||
|
||||
return channel;
|
||||
}
|
||||
return channel;
|
||||
}
|
||||
|
||||
private async Task ProcessEvent(string eventName, string message)
|
||||
{
|
||||
if (_subsManager.HasSubscriptionsForEvent(eventName))
|
||||
{
|
||||
using (var scope = _autofac.BeginLifetimeScope(AUTOFAC_SCOPE_NAME))
|
||||
{
|
||||
var subscriptions = _subsManager.GetHandlersForEvent(eventName);
|
||||
foreach (var subscription in subscriptions)
|
||||
{
|
||||
if (subscription.IsDynamic)
|
||||
{
|
||||
var handler = scope.ResolveOptional(subscription.HandlerType) as IDynamicIntegrationEventHandler;
|
||||
dynamic eventData = JObject.Parse(message);
|
||||
await handler.Handle(eventData);
|
||||
}
|
||||
else
|
||||
{
|
||||
var eventType = _subsManager.GetEventTypeByName(eventName);
|
||||
var integrationEvent = JsonConvert.DeserializeObject(message, eventType);
|
||||
var handler = scope.ResolveOptional(subscription.HandlerType);
|
||||
var concreteType = typeof(IIntegrationEventHandler<>).MakeGenericType(eventType);
|
||||
await (Task)concreteType.GetMethod("Handle").Invoke(handler, new object[] { integrationEvent });
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
private async Task ProcessEvent(string eventName, string message)
|
||||
{
|
||||
if (_subsManager.HasSubscriptionsForEvent(eventName))
|
||||
{
|
||||
using (var scope = _autofac.BeginLifetimeScope(AUTOFAC_SCOPE_NAME))
|
||||
{
|
||||
var subscriptions = _subsManager.GetHandlersForEvent(eventName);
|
||||
foreach (var subscription in subscriptions)
|
||||
{
|
||||
if (subscription.IsDynamic)
|
||||
{
|
||||
var handler = scope.ResolveOptional(subscription.HandlerType) as IDynamicIntegrationEventHandler;
|
||||
dynamic eventData = JObject.Parse(message);
|
||||
await handler.Handle(eventData);
|
||||
}
|
||||
else
|
||||
{
|
||||
var eventType = _subsManager.GetEventTypeByName(eventName);
|
||||
var integrationEvent = JsonConvert.DeserializeObject(message, eventType);
|
||||
var handler = scope.ResolveOptional(subscription.HandlerType);
|
||||
var concreteType = typeof(IIntegrationEventHandler<>).MakeGenericType(eventType);
|
||||
await (Task)concreteType.GetMethod("Handle").Invoke(handler, new object[] { integrationEvent });
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -3,13 +3,13 @@ using System;
|
||||
|
||||
namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBusRabbitMQ
|
||||
{
|
||||
public interface IRabbitMQPersistentConnection
|
||||
: IDisposable
|
||||
{
|
||||
bool IsConnected { get; }
|
||||
public interface IRabbitMQPersistentConnection
|
||||
: IDisposable
|
||||
{
|
||||
bool IsConnected { get; }
|
||||
|
||||
bool TryConnect();
|
||||
bool TryConnect();
|
||||
|
||||
IModel CreateModel();
|
||||
}
|
||||
IModel CreateModel();
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user