/// <summary>
/// Create a connection using an IEndpointResolver.
/// </summary>
/// <param name="endpointResolver">
/// The endpointResolver that returns the endpoints to use for the connection attempt.
/// </param>
/// <param name="clientProvidedName">
/// Application-specific connection name, will be displayed in the management UI
/// if RabbitMQ server supports it. This value doesn't have to be unique and cannot
/// be used as a connection identifier, e.g. in HTTP API requests.
/// This value is supposed to be human-readable.
/// </param>
/// <returns>Open connection</returns>
/// <exception cref="BrokerUnreachableException">
/// When no hostname was reachable.
/// </exception>
public IConnection CreateConnection(IEndpointResolver endpointResolver, string clientProvidedName)
{
IConnection conn;
try
{
if (AutomaticRecoveryEnabled)
{
var autorecoveringConnection = new AutorecoveringConnection(this, clientProvidedName);
autorecoveringConnection.Init(endpointResolver);
conn = autorecoveringConnection;
}
else
{
IProtocol protocol = Protocols.DefaultProtocol;
conn = protocol.CreateConnection(this, false, endpointResolver.SelectOne(this.CreateFrameHandler), clientProvidedName);
}
}
catch (Exception e)
{
throw new BrokerUnreachableException(e);
}
return(conn);
}
public void Init(IEndpointResolver endpoints)
{
this.endpoints = endpoints;
var fh = endpoints.SelectOne(m_factory.CreateFrameHandler);
this.Init(fh);
}
private bool TryRecoverConnectionDelegate()
{
try
{
var fh = endpoints.SelectOne(m_factory.CreateFrameHandler);
m_delegate = new Connection(m_factory, false, fh, this.ClientProvidedName);
return(true);
}
catch (Exception e)
{
ESLog.Error("Connection recovery exception.", e);
// Trigger recovery error events
var handler = m_connectionRecoveryError;
if (handler != null)
{
var args = new ConnectionRecoveryErrorEventArgs(e);
foreach (EventHandler <ConnectionRecoveryErrorEventArgs> h in handler.GetInvocationList())
{
try
{
h(this, args);
}
catch (Exception ex)
{
var a = new CallbackExceptionEventArgs(ex);
a.Detail["context"] = "OnConnectionRecoveryError";
m_delegate.OnCallbackException(a);
}
}
}
}
return(false);
}
public void Init(IEndpointResolver endpoints)
{
_endpoints = endpoints;
IFrameHandler fh = endpoints.SelectOne(_factory.CreateFrameHandler);
Init(fh);
}
private bool TryRecoverConnectionDelegate()
{
try
{
IFrameHandler fh = _endpoints.SelectOne(_factory.CreateFrameHandler);
_delegate = new Connection(_factory, false, fh, ClientProvidedName);
return(true);
}
catch (Exception e)
{
ESLog.Error("Connection recovery exception.", e);
// Trigger recovery error events
foreach (EventHandler <ConnectionRecoveryErrorEventArgs> h in ConnectionRecoveryError?.GetInvocationList() ?? Array.Empty <Delegate>())
{
try
{
h(this, new ConnectionRecoveryErrorEventArgs(e));
}
catch (Exception ex)
{
var a = new CallbackExceptionEventArgs(ex);
a.Detail["context"] = "OnConnectionRecoveryError";
_delegate.OnCallbackException(a);
}
}
}
return(false);
}
public async Task Init(IEndpointResolver endpoints)
{
this.endpoints = endpoints;
var fh = await endpoints.SelectOne(m_factory.CreateFrameHandler);
this.Init(fh);
}
/// <summary>
/// Create a connection using an IEndpointResolver.
/// </summary>
/// <param name="endpointResolver">
/// The endpointResolver that returns the endpoints to use for the connection attempt.
/// </param>
/// <param name="clientProvidedName">
/// Application-specific connection name, will be displayed in the management UI
/// if RabbitMQ server supports it. This value doesn't have to be unique and cannot
/// be used as a connection identifier, e.g. in HTTP API requests.
/// This value is supposed to be human-readable.
/// </param>
/// <returns>Open connection</returns>
/// <exception cref="BrokerUnreachableException">
/// When no hostname was reachable.
/// </exception>
public IConnection CreateConnection(IEndpointResolver endpointResolver, string clientProvidedName)
{
ConnectionConfig config = CreateConfig(clientProvidedName);
try
{
if (AutomaticRecoveryEnabled)
{
return(new AutorecoveringConnection(config, endpointResolver));
}
return(new Connection(config, endpointResolver.SelectOne(CreateFrameHandler)));
}
catch (Exception e)
{
throw new BrokerUnreachableException(e);
}
}
protected bool RecoverConnectionDelegate()
{
while (!ManuallyClosed)
{
try
{
var fh = endpoints.SelectOne(m_factory.CreateFrameHandler);
m_delegate = new Connection(m_factory, false, fh, this.ClientProvidedName);
return(true);
}
catch (Exception e)
{
ESLog.Error("Connection recovery exception.", e);
// Trigger recovery error events
var handler = m_connectionRecoveryError;
if (handler != null)
{
var args = new ConnectionRecoveryErrorEventArgs(e);
foreach (EventHandler <ConnectionRecoveryErrorEventArgs> h in handler.GetInvocationList())
{
try
{
h(this, args);
}
catch (Exception ex)
{
var a = new CallbackExceptionEventArgs(ex);
a.Detail["context"] = "OnConnectionRecoveryError";
m_delegate.OnCallbackException(a);
}
}
}
#if NETFX_CORE
System.Threading.Tasks.Task.Delay(m_factory.NetworkRecoveryInterval).Wait();
#else
Thread.Sleep(m_factory.NetworkRecoveryInterval);
#endif
}
}
return(false);
}
protected async Task <bool> RecoverConnectionDelegate()
{
while (!ManuallyClosed)
{
try
{
var fh = await endpoints.SelectOne(m_factory.CreateFrameHandler);
m_delegate = new Connection(m_factory, false, fh, this.ClientProvidedName);
await m_delegate.Open();
return(true);
}
catch (Exception e)
{
ESLog.Error("Connection recovery exception.", e);
// Trigger recovery error events
var handler = m_connectionRecoveryError;
if (handler != null)
{
var args = new ConnectionRecoveryErrorEventArgs(e);
foreach (AsyncEventHandler <ConnectionRecoveryErrorEventArgs> h in handler.GetInvocationList())
{
try
{
await h(this, args);
}
catch (Exception ex)
{
var a = new CallbackExceptionEventArgs(ex);
a.Detail["context"] = "OnConnectionRecoveryError";
await m_delegate.OnCallbackException(a);
}
}
}
await Task.Delay(m_factory.NetworkRecoveryInterval);
}
}
return(false);
}
public AutorecoveringConnection(ConnectionConfig config, IEndpointResolver endpoints)
{
_config = config;
_endpoints = endpoints;
IFrameHandler fh = _endpoints.SelectOne(_config.FrameHandlerFactory);
_innerConnection = new Connection(_config, fh);
Action <Exception, string> onException =
(exception, context) =>
_innerConnection.OnCallbackException(CallbackExceptionEventArgs.Build(exception, context));
_recoverySucceededWrapper = new EventingWrapper <EventArgs>("OnConnectionRecovery", onException);
_connectionRecoveryErrorWrapper = new EventingWrapper <ConnectionRecoveryErrorEventArgs>("OnConnectionRecoveryError", onException);
_consumerTagChangeAfterRecoveryWrapper = new EventingWrapper <ConsumerTagChangedAfterRecoveryEventArgs>("OnConsumerRecovery", onException);
_queueNameChangeAfterRecoveryWrapper = new EventingWrapper <QueueNameChangedAfterRecoveryEventArgs>("OnQueueRecovery", onException);
ConnectionShutdown += HandleConnectionShutdown;
}
protected void RecoverConnectionDelegate()
{
bool recovering = true;
while (recovering)
{
try
{
var fh = endpoints.SelectOne(m_factory.CreateFrameHandler);
m_delegate = new Connection(m_factory, false, fh, this.ClientProvidedName);
recovering = false;
}
catch (Exception)
{
#if NETFX_CORE
System.Threading.Tasks.Task.Delay(m_factory.NetworkRecoveryInterval).Wait();
#else
Thread.Sleep(m_factory.NetworkRecoveryInterval);
#endif
// TODO: provide a way to handle these exceptions
}
}
}
public void Init(IEndpointResolver endpoints)
{
this.endpoints = endpoints;
var fh = endpoints.SelectOne(m_factory.CreateFrameHandler);
this.Init(fh);
}
