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using System;
using System.Management.Automation;
using System.Management.Automation.Runspaces;
using System.Threading;
namespace PSParallel
{
class PowerShellPoolMember : IDisposable
{
private readonly PowershellPool _pool;
private readonly int _index;
private readonly InitialSessionState _initialSessionState;
private readonly PowerShellPoolStreams _poolStreams;
private PowerShell _powerShell;
public PowerShell PowerShell => _powerShell;
public int Index => _index ;
private readonly PSDataCollection<PSObject> _input =new PSDataCollection<PSObject>();
private PSDataCollection<PSObject> _output;
private int _percentComplete;
public int PercentComplete
{
get { return _percentComplete; }
set { _percentComplete = value; }
}
public PowerShellPoolMember(PowershellPool pool, int index, InitialSessionState initialSessionState)
{
_pool = pool;
_index = index;
_initialSessionState = initialSessionState;
_poolStreams = _pool.Streams;
_input.Complete();
CreatePowerShell(initialSessionState);
}
private void PowerShellOnInvocationStateChanged(object sender, PSInvocationStateChangedEventArgs psInvocationStateChangedEventArgs)
{
switch (psInvocationStateChangedEventArgs.InvocationStateInfo.State)
{
case PSInvocationState.Stopped:
ReleasePowerShell();
_pool.ReportStopped(this);
break;
case PSInvocationState.Completed:
case PSInvocationState.Failed:
ResetPowerShell();
_pool.ReportAvailable(this);
break;
}
}
private void CreatePowerShell(InitialSessionState initialSessionState)
{
var powerShell = PowerShell.Create(RunspaceMode.NewRunspace);
var runspace = RunspaceFactory.CreateRunspace(initialSessionState);
runspace.ApartmentState = ApartmentState.MTA;
powerShell.Runspace = runspace;
runspace.Open();
HookStreamEvents(powerShell.Streams);
powerShell.InvocationStateChanged += PowerShellOnInvocationStateChanged;
_powerShell = powerShell;
_output = new PSDataCollection<PSObject>();
_output.DataAdded += OutputOnDataAdded;
}
public void ResetPowerShell()
{
UnhookStreamEvents(_powerShell.Streams);
_powerShell.Runspace.ResetRunspaceState();
var runspace = _powerShell.Runspace;
_powerShell = PowerShell.Create(RunspaceMode.NewRunspace);
_powerShell.Runspace = runspace;
HookStreamEvents(_powerShell.Streams);
_powerShell.InvocationStateChanged += PowerShellOnInvocationStateChanged;
_output = new PSDataCollection<PSObject>();
_output.DataAdded += OutputOnDataAdded;
}
private void ReleasePowerShell()
{
UnhookStreamEvents(_powerShell.Streams);
_powerShell.InvocationStateChanged -= PowerShellOnInvocationStateChanged;
_output.DataAdded -= OutputOnDataAdded;
_powerShell.Dispose();
}
private void HookStreamEvents(PSDataStreams streams)
{
streams.Debug.DataAdded += DebugOnDataAdded;
streams.Error.DataAdded += ErrorOnDataAdded;
streams.Progress.DataAdded += ProgressOnDataAdded;
streams.Information.DataAdded += InformationOnDataAdded;
streams.Verbose.DataAdded += VerboseOnDataAdded;
streams.Warning.DataAdded += WarningOnDataAdded;
}
private void UnhookStreamEvents(PSDataStreams streams)
{
streams.Warning.DataAdded -= WarningOnDataAdded;
streams.Verbose.DataAdded -= VerboseOnDataAdded;
streams.Information.DataAdded -= InformationOnDataAdded;
streams.Progress.DataAdded -= ProgressOnDataAdded;
streams.Error.DataAdded -= ErrorOnDataAdded;
streams.Debug.DataAdded -= DebugOnDataAdded;
}
public void BeginInvoke(ScriptBlock scriptblock, PSObject inputObject)
{
_percentComplete = 0;
string command = $"param($_,$PSItem, $PSPArallelIndex,$PSParallelProgressId){scriptblock}";
_powerShell.AddScript(command)
.AddParameter("_", inputObject)
.AddParameter("PSItem", inputObject)
.AddParameter("PSParallelIndex", _index)
.AddParameter("PSParallelProgressId", _index + 1000);
_powerShell.BeginInvoke(_input, _output);
}
public void Dispose()
{
var ps = _powerShell;
if (ps != null)
{
UnhookStreamEvents(ps.Streams);
ps.Runspace?.Dispose();
ps.Dispose();
}
_output.Dispose();
_input.Dispose();
}
private void OutputOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var item = ((PSDataCollection<PSObject>)sender)[dataAddedEventArgs.Index];
_poolStreams.Output.Add(item);
}
private void InformationOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var ir = ((PSDataCollection<InformationRecord>)sender)[dataAddedEventArgs.Index];
_poolStreams.Information.Add(ir);
}
private void ProgressOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var psDataCollection = ((PSDataCollection<ProgressRecord>) sender);
var record = psDataCollection[dataAddedEventArgs.Index];
_poolStreams.AddProgress(record, _index);
}
private void ErrorOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var record = ((PSDataCollection<ErrorRecord>)sender)[dataAddedEventArgs.Index];
_poolStreams.Error.Add(record);
}
private void DebugOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var record = ((PSDataCollection<DebugRecord>)sender)[dataAddedEventArgs.Index];
_poolStreams.Debug.Add(record);
}
private void WarningOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var record = ((PSDataCollection<WarningRecord>)sender)[dataAddedEventArgs.Index];
_poolStreams.Warning.Add(record);
}
private void VerboseOnDataAdded(object sender, DataAddedEventArgs dataAddedEventArgs)
{
var record = ((PSDataCollection<VerboseRecord>)sender)[dataAddedEventArgs.Index];
_poolStreams.Verbose.Add(record);
}
public void Stop()
{
if(_powerShell.InvocationStateInfo.State != PSInvocationState.Stopped)
{
UnhookStreamEvents(_powerShell.Streams);
_powerShell.BeginStop(OnStopped, null);
}
}
private void OnStopped(IAsyncResult ar)
{
var ps = _powerShell;
if (ps == null)
{
return;
}
ps.EndStop(ar);
_powerShell = null;
}
}
}