/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main(params string[] args)
{
var notificationConfigs = new List <NotificationServiceConfig>();
var applicationConfigs = new List <ApplicationServiceConfig>();
try
{
Logger.TraceEvent(TraceEventType.Information, "Loading configuration...");
var appDirectory = System.Reflection.Assembly.GetExecutingAssembly().Location;
FileInfo file = new FileInfo(appDirectory);
var configPath = Path.Combine(file.Directory.Parent.FullName, @"Config\EAService.config");
var eaConfig = XElement.Load(configPath);
Logger.TraceEvent(TraceEventType.Information, "Loaded config from file.");
XmlNamespaceManager nsman = new XmlNamespaceManager(new NameTable());
XNamespace ea = "http://schemas.microsoft.com/sqlserver/2008/10/servicebroker/externalactivator";
nsman.AddNamespace("ea", ea.ToString());
var storedProc = eaConfig.Element(ea + "StoredProcedure").AsString();
if (string.IsNullOrWhiteSpace(storedProc))
{
throw new Exception("The configuration needs to include the StoredProcedure element as a child of the Activator element.");
}
var notificationElements = eaConfig.XPathSelectElements("ea:NotificationServiceList/ea:NotificationService", nsman);
if (notificationElements == null || !notificationElements.Any())
{
throw new Exception("The EAService.config was not configured with notification services.");
}
foreach (var notificationElement in notificationElements)
{
var config = new NotificationServiceConfig()
{
StoredProcedure = storedProc,
ConnectionString = notificationElement.XPathSelectElement("ea:ConnectionString/ea:Unencrypted", nsman).AsString()
};
notificationConfigs.Add(config);
}
var applicationElements = eaConfig.XPathSelectElements("ea:ApplicationServiceList/ea:ApplicationService", nsman);
if (applicationElements == null || !applicationElements.Any())
{
throw new Exception("The EAService.config was not configured with application services.");
}
foreach (var applicationElement in applicationElements)
{
string maxConcVal = applicationElement.XPathSelectElement("ea:Concurrency", nsman)?.Attribute("max")?.Value;
string minConcVal = applicationElement.XPathSelectElement("ea:Concurrency", nsman)?.Attribute("min")?.Value;
int maxConc = int.TryParse(maxConcVal, out maxConc) ? Math.Max(maxConc, 0) : 0;
int minConc = int.TryParse(minConcVal, out minConc) ? Math.Max(minConc, 0) : 0;
var config = new ApplicationServiceConfig()
{
DatabaseName = applicationElement.XPathSelectElement("ea:OnNotification/ea:DatabaseName", nsman).AsString(),
SchemaName = applicationElement.XPathSelectElement("ea:OnNotification/ea:SchemaName", nsman).AsString(),
QueueName = applicationElement.XPathSelectElement("ea:OnNotification/ea:QueueName", nsman).AsString(),
ExecutablePath = applicationElement.XPathSelectElement("ea:LaunchInfo/ea:ImagePath", nsman).AsString(),
WorkingDirectory = applicationElement.XPathSelectElement("ea:LaunchInfo/ea:WorkDir", nsman).AsString(),
CommandLineArguments = applicationElement.XPathSelectElement("ea:LaunchInfo/ea:CmdLineArgs", nsman).AsString(),
MaxConcurrency = maxConc,
MinConcurrency = minConc
};
applicationConfigs.Add(config);
}
Logger.TraceEvent(TraceEventType.Information, "Configuration parsed successfully.");
}
catch (Exception ex)
{
Logger.TraceEvent(TraceEventType.Error, $"{ex}");
throw ex;
}
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
var applicationServiceList = new ApplicationServiceList(applicationConfigs);
var tasks = notificationConfigs
.Select(c => new NotificationService(c, applicationServiceList))
.SelectMany(n => new []
{
new Task(() => n.Execute(cancellationTokenSource.Token), TaskCreationOptions.LongRunning),
new Task(() => n.MonitorQueueReaders(cancellationTokenSource.Token), TaskCreationOptions.LongRunning)
})
.ToArray();
if (args.Length > 0 && args[0].StartsWith("/service:", StringComparison.OrdinalIgnoreCase))
{
var argParts = args[0].Split(':');
if (argParts.Length != 2)
{
throw new InvalidOperationException($"Invalid argument '{args[0]}'. Expected /service:<serviceName>");
}
ExecuteAsWindowsService(tasks, cancellationTokenSource, argParts[1]);
}
else
{
ExecuteAsConsoleApplication(tasks, cancellationTokenSource);
}
}
public NotificationService(NotificationServiceConfig config, ApplicationServiceList applicationServices)
{
_connectionString = config.ConnectionString;
_storedProcedure = config.StoredProcedure;
_applicationServices = applicationServices;
}