File size: 6,191 Bytes
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// Licensed under the MIT License.
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Management.Automation;
using System.Management.Automation.Runspaces;
using Dbg = System.Management.Automation.Diagnostics;
namespace Microsoft.PowerShell.Commands
{
/// <summary>
/// This cmdlet returns runspaces in the PowerShell session.
/// </summary>
[Cmdlet(VerbsCommon.Get, "Runspace", DefaultParameterSetName = GetRunspaceCommand.NameParameterSet,
HelpUri = "https://go.microsoft.com/fwlink/?LinkID=2096616")]
[OutputType(typeof(Runspace))]
public sealed class GetRunspaceCommand : PSCmdlet
{
#region Strings
private const string NameParameterSet = "NameParameterSet";
private const string IdParameterSet = "IdParameterSet";
private const string InstanceIdParameterSet = "InstanceIdParameterSet";
#endregion
#region Parameters
/// <summary>
/// Specifies name or names of Runspaces to return.
/// </summary>
[Parameter(Position = 0,
ParameterSetName = GetRunspaceCommand.NameParameterSet)]
[ValidateNotNullOrEmpty()]
[SuppressMessage("Microsoft.Performance", "CA1819:PropertiesShouldNotReturnArrays")]
public string[] Name
{
get;
set;
}
/// <summary>
/// Specifies one or more Ids of Runspaces to return.
/// </summary>
[Parameter(Position = 0,
Mandatory = true,
ParameterSetName = GetRunspaceCommand.IdParameterSet)]
[SuppressMessage("Microsoft.Performance", "CA1819:PropertiesShouldNotReturnArrays")]
public int[] Id
{
get;
set;
}
/// <summary>
/// Specifies one or more InstanceId Guids of Runspaces to return.
/// </summary>
[Parameter(Position = 0,
Mandatory = true,
ParameterSetName = GetRunspaceCommand.InstanceIdParameterSet)]
[SuppressMessage("Microsoft.Performance", "CA1819:PropertiesShouldNotReturnArrays")]
public Guid[] InstanceId
{
get;
set;
}
#endregion
#region Overrides
/// <summary>
/// Process record.
/// </summary>
protected override void ProcessRecord()
{
IReadOnlyList<Runspace> results;
if ((ParameterSetName == GetRunspaceCommand.NameParameterSet) && ((Name == null) || Name.Length == 0))
{
results = GetRunspaceUtils.GetAllRunspaces();
}
else
{
switch (ParameterSetName)
{
case GetRunspaceCommand.NameParameterSet:
results = GetRunspaceUtils.GetRunspacesByName(Name);
break;
case GetRunspaceCommand.IdParameterSet:
results = GetRunspaceUtils.GetRunspacesById(Id);
break;
case GetRunspaceCommand.InstanceIdParameterSet:
results = GetRunspaceUtils.GetRunspacesByInstanceId(InstanceId);
break;
default:
Dbg.Assert(false, "Unknown parameter set in GetRunspaceCommand");
results = new List<Runspace>().AsReadOnly();
break;
}
}
foreach (Runspace runspace in results)
{
WriteObject(runspace);
}
}
#endregion
}
#region GetRunspaceUtils
internal static class GetRunspaceUtils
{
internal static IReadOnlyList<Runspace> GetAllRunspaces()
{
return Runspace.RunspaceList;
}
internal static IReadOnlyList<Runspace> GetRunspacesByName(string[] names)
{
List<Runspace> rtnRunspaces = new();
IReadOnlyList<Runspace> runspaces = Runspace.RunspaceList;
foreach (string name in names)
{
WildcardPattern namePattern = WildcardPattern.Get(name, WildcardOptions.IgnoreCase);
foreach (Runspace runspace in runspaces)
{
if (namePattern.IsMatch(runspace.Name))
{
rtnRunspaces.Add(runspace);
}
}
}
return rtnRunspaces.AsReadOnly();
}
internal static IReadOnlyList<Runspace> GetRunspacesById(int[] ids)
{
List<Runspace> rtnRunspaces = new();
foreach (int id in ids)
{
WeakReference<Runspace> runspaceRef;
if (Runspace.RunspaceDictionary.TryGetValue(id, out runspaceRef))
{
Runspace runspace;
if (runspaceRef.TryGetTarget(out runspace))
{
rtnRunspaces.Add(runspace);
}
}
}
return rtnRunspaces.AsReadOnly();
}
internal static IReadOnlyList<Runspace> GetRunspacesByInstanceId(Guid[] instanceIds)
{
List<Runspace> rtnRunspaces = new();
IReadOnlyList<Runspace> runspaces = Runspace.RunspaceList;
foreach (Guid instanceId in instanceIds)
{
foreach (Runspace runspace in runspaces)
{
if (runspace.InstanceId == instanceId)
{
// Because of disconnected remote runspace sessions, it is possible to have
// more than one runspace with the same instance Id (remote session ids are
// the same as the runspace object instance Id).
rtnRunspaces.Add(runspace);
}
}
}
return rtnRunspaces.AsReadOnly();
}
}
#endregion
}
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