private Collection<PSObject> ExecutePipeline(ExecutionOptions options, Pipeline tempPipeline,
Collection<PSObject> collection, out IEnumerable<ErrorRecord> exceptionThrown)
{
exceptionThrown = null;
try
{
bool acquired = Monitor.TryEnter(_runspace);
if (! acquired)
{
return null;
}
try
{
_currentPipeline = tempPipeline;
IEnumerable<ErrorRecord> exception = null;
try
{
WaitWhileRunspaceIsBusy();
tempPipeline.StateChanged += OnPipelineStateChange;
try
{
ExecutePipeline(options, tempPipeline);
}
catch (PSInvalidOperationException ioe)
{
/*
* HACK: there seems to be some lag between the toggle of the runspace
* availability state and the clearing of the runspace's current
* pipeline state. it's possible for the runspace to report it's available
* for use and then raise a PSInvalidOperationException indicating that another
* pipeline is currently executing.
*
* This is a hacky way around the issue - wait 1/3 of a second for the
* runspace state to clear and try again.
*
* I've also tried adding a WaitWhilePipelineIsRunning method that spins
* on a DoWait while the pipeline is not in the completed or failed state;
* however this seems to slow the execution down considerably.
*/
if (tempPipeline.PipelineStateInfo.State == PipelineState.NotStarted)
{
Thread.Sleep(333);
ExecutePipeline(options, tempPipeline);
}
}
tempPipeline.Input.Close();
// WaitWhilePipelineIsRunning(tempPipeline);
collection = tempPipeline.Output.ReadToEnd();
if (null != tempPipeline.PipelineStateInfo.Reason)
{
throw tempPipeline.PipelineStateInfo.Reason;
}
exception = GetPipelineErrors(options, tempPipeline);
}
catch( RuntimeException re )
{
exception = new ErrorRecord[]{re.ErrorRecord};
}
catch( Exception e )
{
exception = new ErrorRecord[]
{
new ErrorRecord( e, e.GetType().FullName, ErrorCategory.NotSpecified, null),
};
}
finally
{
_currentPipeline = null;
}
if (null != exception)
{
if (!options.HasFlag(ExecutionOptions.DoNotRaisePipelineException))
{
exception.ToList().ForEach( RaisePipelineExceptionEvent );
}
exceptionThrown = exception;
}
}
finally
{
Monitor.Exit(_runspace);
}
}
catch (Exception ex)
{
exceptionThrown = new ErrorRecord[]
{
new ErrorRecord( ex, ex.GetType().FullName, ErrorCategory.NotSpecified, null),
};
}
return collection;
}