/// <summary>
/// Executes this instance.
/// </summary>
public override void Execute(ref ServiceAppContext context)
{
// Will write to the console when in debug mode, and will write to the SAC that it is hosted in.
Console.WriteLine(
"User {0}. Message: {1}. Parameters: {2}",
Environment.UserName,
ConfigurationManager.AppSettings["Message"],
Implementation.Utils.Settings.Parameters);
bool throwEx;
if (bool.TryParse(ConfigurationManager.AppSettings["ThrowException"], out throwEx) && throwEx)
{
throw new TestException("Testing exception throwing");
}
bool testMemory;
if (bool.TryParse(ConfigurationManager.AppSettings["TestMemory"], out testMemory) && testMemory)
{
Random rand = new Random();
StringBuilder builder = new StringBuilder();
for (long i = 0; i < 250 * 1000L * 1000L; i++)
{
builder.Append((char)rand.Next(32, 127));
}
}
Thread.Sleep(int.Parse(ConfigurationManager.AppSettings["SleepSeconds"]) * 1000);
}
/// <summary>
/// Signals to start a new execution at the next available slot.
/// </summary>
protected void QueueExecution()
{
lock (_syncExecution)
{
if (!this.IsLoaded || this.IsStopped)
{
throw new InvalidOperationException("Cannot execute. Service app is not loaded or has stopped.");
}
bool createContext = false;
switch (this.ExecutionMode)
{
case ExecutionMode.Default:
case ExecutionMode.Idempotent:
if (!this._executionContexts.Any() || this._executionContexts.All(c => c.Failed))
{
createContext = true;
}
break;
case ExecutionMode.Inline:
createContext = true;
break;
case ExecutionMode.Concurrent:
if (Settings.MaxConcurrentExecutions == 0 || this._executionContexts.Count(c => c.IsExecuting) <= Settings.MaxConcurrentExecutions)
{
createContext = true;
}
break;
default:
throw new NotImplementedException("Execution mode not yet implemented");
}
if (createContext)
{
var context = new ServiceAppContext()
{
Failed = false,
QueuedTime = DateTimeResolver.Resolve(),
Guid = Guid.NewGuid().ToString(),
Name = this.DisplayName
};
this._executionContexts.Add(context);
}
}
}
/// <summary>
/// Serializes the message as a performance message.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public override string SerializeAsPerformance(ServiceAppContext context)
{
return(serializer.Serialize(new
{
performance = new
{
name = context.Name,
guid = context.Guid,
startTime = context.StartTime,
endTime = context.EndTime,
failed = context.Failed,
message = context.CustomMessage
}
}));
}
/// <summary> /// Executes this instance using the specified execution context. /// </summary> /// <param name="context">The current execution context. In derived classes that implement this method, this object /// contains information about the current execution.</param> /// <remarks> /// <para> /// The context is passed in by ref to prevent direct invocation of this outside of the SACS.Implemetation and /// passing in a null. /// </para> /// <para> /// ServiceAppContext is sealed and cannot be instantiated outside of the SACS.Implementation assembly. To run this /// method, use <see cref="QueueExecution"/>. /// </para></remarks> public abstract void Execute(ref ServiceAppContext context);
/// <summary>
/// Handles the 'tick' event of the executionTimer.
/// </summary>
/// <param name="state">The state.</param>
private void ExecutionTimer_Tick(object state)
{
if (this.IsStopped)
{
_executionTimer.Change(Timeout.Infinite, Timeout.Infinite);
return;
}
ServiceAppContext currentContext = null;
switch (this.ExecutionMode)
{
case Execution.ExecutionMode.Default:
case Execution.ExecutionMode.Idempotent:
case Execution.ExecutionMode.Concurrent:
currentContext = this._executionContexts.FirstOrDefault(c => c.CanExecute);
break;
case Execution.ExecutionMode.Inline:
currentContext = this._executionContexts.FirstOrDefault(c => c.CanExecute && !this.IsExecuting);
break;
default:
throw new NotImplementedException("Execution mode not yet implemented");
}
if (currentContext != null)
{
Task executionTask = Task.Run(() =>
{
Messages.WriteState(Enums.State.Executing);
Messages.WriteDebug("Starting exection for {0}. Time: {1}", this.DisplayName, currentContext.StartTime);
currentContext.StartTime = DateTimeResolver.Resolve();
Messages.WritePerformance(currentContext);
try
{
this.Execute(ref currentContext);
Messages.WriteState(Enums.State.Idle);
}
catch (Exception e)
{
currentContext.Failed = true;
currentContext.CustomMessage = e.Message;
this.HandleException(e, false);
Messages.WriteState(Enums.State.Failed);
}
finally
{
currentContext.EndTime = DateTimeResolver.Resolve();
Messages.WriteDebug("Ended exection for {0}. Duration: {1}", this.DisplayName, currentContext.Duration);
Messages.WritePerformance(currentContext);
}
this._executionContexts.Remove(currentContext);
});
currentContext.Handle = executionTask;
}
this.CleanUpServiceAppContexts();
this.CheckParentProcessAlive();
}
/// <summary>
/// Writes the provided string as a "performance" message to the standard output stream.
/// </summary>
/// <param name="context">The service app context to get the prformance information from.</param>
internal static void WritePerformance(ServiceAppContext context)
{
Console.WriteLine(Provider.SerializeAsPerformance(context));
FileLogger.Log("Sent performance information");
}
public override void Execute(ref ServiceAppContext context)
{
ExecuteResolver(context);
}
public override void Execute(ref ServiceAppContext context)
{
// do nothing
}
/// <summary> /// Serializes the message as a performance message. /// </summary> /// <param name="context">The context.</param> /// <returns></returns> public abstract string SerializeAsPerformance(ServiceAppContext context);
public DbRepository(ServiceAppContext context)
{
this.context = context;
this.dbSet = this.context.Set <TEntity>();
}
