/// <summary>
/// Runs the task asynchronously.
/// </summary>
public System.Threading.Tasks.Task RunTask()
{
if (Interlocked.Exchange(ref _taskRan, 1) != 0)
{
// Return if we have already called RunTask
throw new InvalidOperationException("TaskRun has already been called on TaskRuntime.");
}
// Send heartbeat such that user receives a TaskRunning message.
_currentStatus.SetRunning();
return(System.Threading.Tasks.Task.Run(() =>
{
Logger.Log(Level.Info, "Calling into user's task.");
return _userTask.Call(null);
}).ContinueWith(runTask =>
{
try
{
// Task failed.
if (runTask.IsFaulted)
{
Logger.Log(Level.Warning,
string.Format(CultureInfo.InvariantCulture, "Task failed caused by exception [{0}]", runTask.Exception));
_currentStatus.SetException(runTask.Exception);
return;
}
if (runTask.IsCanceled)
{
Logger.Log(Level.Warning,
string.Format(CultureInfo.InvariantCulture, "Task failed caused by task cancellation"));
return;
}
// Task completed.
var result = runTask.Result;
Logger.Log(Level.Info, "Task Call Finished");
_currentStatus.SetResult(result);
if (result != null && result.Length > 0)
{
Logger.Log(Level.Info, "Task running result:\r\n" + System.Text.Encoding.Default.GetString(result));
}
}
finally
{
if (_userTask != null)
{
_userTask.Dispose();
}
runTask.Dispose();
}
}));
}
public void CanInjectAndExecuteTask()
{
//To enforce that shell task dll be copied to output directory.
ShellTask tmpTask = new ShellTask("invalid");
Assert.IsNotNull(tmpTask);
string tmp = Directory.GetCurrentDirectory();
Assert.IsNotNull(tmp);
AvroConfigurationSerializer serializer = new AvroConfigurationSerializer();
AvroConfiguration avroConfiguration = serializer.AvroDeseriaizeFromFile("evaluator.conf");
Assert.IsNotNull(avroConfiguration);
ICsConfigurationBuilder cb = TangFactory.GetTang().NewConfigurationBuilder();
cb.AddConfiguration(TaskConfiguration.ConfigurationModule
.Set(TaskConfiguration.Identifier, "Test_CLRContext_task")
.Set(TaskConfiguration.Task, GenericType <ShellTask> .Class)
.Build());
cb.BindNamedParameter <ShellTask.Command, string>(GenericType <ShellTask.Command> .Class, "dir");
IConfiguration taskConfiguration = cb.Build();
string taskConfig = serializer.ToString(taskConfiguration);
ITask task = null;
TaskConfiguration config = new TaskConfiguration(taskConfig);
Assert.IsNotNull(config);
try
{
IInjector injector = TangFactory.GetTang().NewInjector(config.TangConfig);
task = (ITask)injector.GetInstance(typeof(ITask));
}
catch (Exception e)
{
throw new InvalidOperationException("unable to inject task with configuration: " + taskConfig, e);
}
byte[] bytes = task.Call(null);
string result = System.Text.Encoding.Default.GetString(bytes);
//a dir command is executed in the container directory, which includes the file "evaluator.conf"
Assert.IsTrue(result.Contains("evaluator.conf"));
}
/// <summary>
/// Runs the task asynchronously.
/// </summary>
public Thread StartTaskOnNewThread()
{
if (Interlocked.Exchange(ref _taskRan, 1) != 0)
{
// Return if we have already called StartTaskOnNewThread
throw new InvalidOperationException("TaskRun has already been called on TaskRuntime.");
}
_currentStatus.SetInit();
var taskThread = new Thread(() =>
{
// The result of the task execution.
byte[] resultReturnedByTask = null;
// Whether or not a result shall be returned to the Driver.
bool returnResultToDriver = true;
// Exception thrown during `Dispose`, if any.
Exception exceptionThrownByTaskDispose = null;
try
{
// Run the handlers for `TaskStart`
Logger.Log(Level.Verbose, "Set running status for task");
_currentStatus.RunTaskStartHandlers();
// Update the state
_currentStatus.SetRunning();
// Call the Task
Logger.Log(Level.Verbose, "Calling into user's task.");
resultReturnedByTask = _userTask.Call(null);
Logger.Log(Level.Info, "Task Call Finished");
if (!_currentStatus.HasEnded())
{
Logger.Log(Level.Info, "Run the task stop handlers");
_currentStatus.RunTaskStopHandlers();
// Log the result
const Level resultLogLevel = Level.Verbose;
if (Logger.IsLoggable(resultLogLevel) && resultReturnedByTask != null &&
resultReturnedByTask.Length > 0)
{
Logger.Log(resultLogLevel,
"Task running result:\r\n" +
System.Text.Encoding.Default.GetString(resultReturnedByTask));
}
}
else
{
Logger.Log(Level.Info, "Task not running current state {0}", _currentStatus.State);
returnResultToDriver = false;
}
}
catch (TaskStartHandlerException e)
{
Logger.Log(Level.Info, "TaskRuntime::TaskStartHandlerException");
_currentStatus.SetException(e.InnerException);
returnResultToDriver = false;
}
catch (TaskStopHandlerException e)
{
Logger.Log(Level.Info, "TaskRuntime::TaskStopHandlerException");
_currentStatus.SetException(e.InnerException);
returnResultToDriver = false;
}
catch (Exception e)
{
Logger.Log(Level.Info, "TaskRuntime::Exception {0}", e.GetType());
_currentStatus.SetException(e);
returnResultToDriver = false;
}
finally
{
try
{
Logger.Log(Level.Info, "Try to dispose of task");
_userTask.Dispose();
Logger.Log(Level.Info, "task diposed");
}
catch (Exception e)
{
exceptionThrownByTaskDispose = new InvalidOperationException("Exception during Task Dispose in task Call()", e);
}
}
// Inform the driver about the result.
if (returnResultToDriver)
{
_currentStatus.SetResult(resultReturnedByTask);
}
// If the ITask.Dispose() method threw an Exception, crash the Evaluator.
if (exceptionThrownByTaskDispose != null)
{
throw exceptionThrownByTaskDispose;
}
});
taskThread.Start();
return(taskThread);
}
private byte[] RunTask(byte[] memento)
{
return(_task.Call(memento));
}
/// <summary>
/// Runs the task asynchronously.
/// </summary>
public Thread StartTaskOnNewThread()
{
if (Interlocked.Exchange(ref _taskRan, 1) != 0)
{
// Return if we have already called StartTaskOnNewThread
throw new InvalidOperationException("TaskRun has already been called on TaskRuntime.");
}
_currentStatus.SetInit();
var taskThread = new Thread(() =>
{
try
{
Logger.Log(Level.Verbose, "Set running status for task");
_currentStatus.SetRunning();
Logger.Log(Level.Verbose, "Calling into user's task.");
var result = _userTask.Call(null);
Logger.Log(Level.Info, "Task Call Finished");
_currentStatus.SetResult(result);
const Level resultLogLevel = Level.Verbose;
if (Logger.IsLoggable(resultLogLevel) && result != null && result.Length > 0)
{
Logger.Log(resultLogLevel,
"Task running result:\r\n" + System.Text.Encoding.Default.GetString(result));
}
}
catch (TaskStartHandlerException e)
{
Logger.Log(Level.Info, "TaskRuntime::TaskStartHandlerException");
_currentStatus.SetException(e.InnerException);
}
catch (TaskStopHandlerException e)
{
Logger.Log(Level.Info, "TaskRuntime::TaskStopHandlerException");
_currentStatus.SetException(e.InnerException);
}
catch (Exception e)
{
Logger.Log(Level.Info, "TaskRuntime::Exception {0}", e.GetType());
_currentStatus.SetException(e);
}
finally
{
try
{
if (_userTask != null)
{
_userTask.Dispose();
}
}
catch (Exception e)
{
var msg = "Exception during Task Dispose in task Call()";
Logger.Log(Level.Error, msg);
throw new InvalidOperationException(msg, e);
}
}
});
taskThread.Start();
return(taskThread);
}
