/// <summary>
/// Checks if CAST has been enabled and remote communication has been configured for this platform.
/// </summary>
/// <returns>True if CAST communication should take place.</returns>
public bool GetIsCastConfigured()
{
using (Profiler.Measure("CastService.GetIsCastConfigured"))
{
var isCastEnabled = false;
var isRabbitMqConfigured = false;
// is CAST enabled?
var castConfiguration = ConfigurationSettings.GetCastConfigurationSection();
if (castConfiguration != null)
{
var castSettings = castConfiguration.Cast;
if (castSettings != null)
{
isCastEnabled = castSettings.Enabled;
}
}
// is RabbitMQ configured for communication?
var mqConfiguration = ConfigurationSettings.GetRabbitMqConfigurationSection();
if (mqConfiguration != null)
{
var mqSettings = mqConfiguration.RabbitMq;
if (mqSettings != null)
{
isRabbitMqConfigured = !string.IsNullOrEmpty(mqSettings.HostName);
}
}
return(isCastEnabled && isRabbitMqConfigured);
}
}
private static ConnectionFactory GetConnectionFactory()
{
var rabbitConfiguration = ConfigurationSettings.GetRabbitMqConfigurationSection();
if (rabbitConfiguration == null)
{
throw new Exception("Cannot connect. Message Queue configuration not present.");
}
if (string.IsNullOrEmpty(rabbitConfiguration.RabbitMq.HostName))
{
throw new Exception("Cannot connect. Message Queue host name has not been specified.");
}
var settings = rabbitConfiguration.RabbitMq;
//
// TODO: SSL support
//
return(new ConnectionFactory
{
HostName = settings.HostName,
UserName = string.IsNullOrEmpty(settings.User) ? ConnectionFactory.DefaultUser : settings.User,
Password = string.IsNullOrEmpty(settings.Password) ? ConnectionFactory.DefaultPass : settings.Password,
Port = settings.Port > 0 ? settings.Port : AmqpTcpEndpoint.UseDefaultPort,
VirtualHost = string.IsNullOrEmpty(settings.VirtualHost) ? ConnectionFactory.DefaultVHost : settings.VirtualHost
//Protocol = Protocols.DefaultProtocol,
//Ssl = new SslOption
//{
// Enabled = true,
// ServerName = hostName,
// AcceptablePolicyErrors = SslPolicyErrors.RemoteCertificateNameMismatch | SslPolicyErrors.RemoteCertificateChainErrors
//}
});
}
/// <summary>
/// Starts the global message queue response manager listening for the responses to any registered requests.
/// </summary>
public static void Start()
{
try
{
if (_instance != null)
{
return;
}
var config = ConfigurationSettings.GetRabbitMqConfigurationSection();
if (config == null)
{
return;
}
var settings = config.RabbitMq;
if (settings == null)
{
return;
}
if (string.IsNullOrEmpty(settings.HostName))
{
return;
}
lock (Sync)
{
if (_instance == null)
{
_instance = new MessageQueueResponseManager();
_instance.StartInternal();
}
}
var maxWait = TimeSpan.FromMinutes(1);
var sw = Stopwatch.StartNew();
while (!_instance.IsListening && sw.Elapsed < maxWait)
{
// wait... but only so long
Thread.Sleep(100);
}
if (!_instance.IsListening)
{
EventLog.Application.WriteError("Message Queue Response Manager: Thread did not start in time. Exiting.");
}
using (new AdministratorContext())
{
var requests = Entity.GetInstancesOfType <MessageQueueRequest>();
foreach (var request in requests)
{
//
// TODO: ? Maybe if the persisted entity is too old, it should just be deleted?
//
Add(request);
}
}
}
catch (Exception e)
{
EventLog.Application.WriteError("Unexpected failure starting the message queue response manager. {0}", e);
}
}
