/// <summary>
/// Adds the just saved message queue request to the response manager for watching.
/// </summary>
/// <param name="entities">The entities.</param>
/// <param name="state">The state passed between the before save and after save callbacks.</param>
public void OnAfterSave(IEnumerable <IEntity> entities, IDictionary <string, object> state)
{
foreach (var entity in entities)
{
MessageQueueResponseManager.Add(entity.As <MessageQueueRequest>());
}
}
/// <summary>
/// Removes the about to be deleted message queue request from the watch list of the response manager.
/// </summary>
/// <param name="entities">The entities.</param>
/// <param name="state">The state passed between the before delete and after delete callbacks.</param>
/// <returns>True to cancel the delete operation; false otherwise.</returns>
public bool OnBeforeDelete(IEnumerable <IEntity> entities, IDictionary <string, object> state)
{
foreach (var entity in entities)
{
MessageQueueResponseManager.Remove(entity.As <MessageQueueRequest>());
}
return(false);
}
/// <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);
}
}
