/// <summary>
/// Creates a new channel on the specified broker.
/// </summary>
/// <param name="brokerName">The broker to create channel.</param>
/// <returns>The created connection channel.</returns>
public IModel CreateChannel(string brokerName)
{
Check.NotNullOrWhiteSpace(brokerName, nameof(brokerName));
BrokerConnection brokerConn = GetBrokerConnection(brokerName);
IModel channel = null;
try
{
channel = brokerConn.Connection.CreateModel();
}
catch (BrokerUnreachableException)
{
ConnectToBroker(brokerConn);
channel = brokerConn.Connection.CreateModel();
}
catch (AlreadyClosedException)
{
ConnectToBroker(brokerConn);
channel = brokerConn.Connection.CreateModel();
}
return(channel);
}
/// <summary>
/// Determines if there is currently an open connection to the broker.
/// </summary>
/// <param name="brokerName">The name of the broker.</param>
/// <returns>True if connection is open. Otherwise, False.</returns>
public bool IsBrokerConnected(string brokerName)
{
Check.NotNullOrWhiteSpace(brokerName, nameof(brokerName));
BrokerConnection brokerConn = GetBrokerConnection(brokerName);
return(brokerConn.Connection != null && brokerConn.Connection.IsOpen);
}
private BrokerConnection GetBrokerConnection(string brokerName)
{
BrokerConnection brokerConn = _connections.GetOptionalValue(brokerName);
if (brokerConn == null)
{
throw new BrokerException(
$"An existing broker with the name of: {brokerName} does not exist.");
}
return(brokerConn);
}
/// <summary>
/// Reestablishes the connection to the broker if not open.
/// </summary>
/// <param name="brokerName">The name of the broker.</param>
public bool ReconnectToBroker(string brokerName)
{
Check.NotNullOrWhiteSpace(brokerName, nameof(brokerName));
BrokerConnection brokerConn = GetBrokerConnection(brokerName);
if (brokerConn.Connection == null || !brokerConn.Connection.IsOpen)
{
ConnectToBroker(brokerConn);
return(true);
}
return(false);
}
protected virtual void ConnectToBroker(BrokerConnection brokerConn)
{
IConnectionFactory connFactory = CreateConnFactory(brokerConn.Settings);
try
{
ExecuteAction.WithRetry <BrokerUnreachableException>(
_brokerSettings.NumConnectionRetries,
(retryCount) => {
LogConnectionException(brokerConn.Settings, retryCount);
brokerConn.Connection = connFactory.CreateConnection();
});
}
catch (BrokerUnreachableException ex)
{
LogConnectionException(brokerConn.Settings, connEx: ex);
}
}
