File size: 2,953 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Globalization;
using System.Text;
using Microsoft.Management.Infrastructure;
using Dbg = System.Management.Automation.Diagnostics;
namespace Microsoft.PowerShell.Cmdletization.Cim
{
/// <summary>
/// Job that handles executing a WQL (in the future CQL?) query on a remote CIM server.
/// </summary>
internal sealed class QueryInstancesJob : QueryJobBase
{
private readonly string _wqlQuery;
private readonly bool _useEnumerateInstances;
internal QueryInstancesJob(CimJobContext jobContext, CimQuery cimQuery, string wqlCondition)
: base(jobContext, cimQuery)
{
Dbg.Assert(wqlCondition != null, "Caller should verify that wqlCondition is not null");
var wqlQueryBuilder = new StringBuilder();
wqlQueryBuilder.Append("SELECT * FROM ");
wqlQueryBuilder.Append(this.JobContext.ClassName);
wqlQueryBuilder.Append(' ');
wqlQueryBuilder.Append(wqlCondition);
_wqlQuery = wqlQueryBuilder.ToString();
if (string.IsNullOrWhiteSpace(wqlCondition))
{
_useEnumerateInstances = true;
}
else
{
if (jobContext.CmdletInvocationContext.CmdletDefinitionContext.UseEnumerateInstancesInsteadOfWql)
{
_useEnumerateInstances = true;
}
}
}
internal override IObservable<CimInstance> GetCimOperation()
{
this.WriteVerboseStartOfCimOperation();
IObservable<CimInstance> observable;
if (_useEnumerateInstances)
{
observable = this.JobContext.Session.EnumerateInstancesAsync(
this.JobContext.Namespace,
this.JobContext.ClassNameOrNullIfResourceUriIsUsed,
this.CreateOperationOptions());
}
else
{
observable = this.JobContext.Session.QueryInstancesAsync(
this.JobContext.Namespace,
"WQL",
_wqlQuery,
this.CreateOperationOptions());
}
return observable;
}
internal override string Description
{
get
{
return this.FailSafeDescription;
}
}
internal override string FailSafeDescription
{
get
{
return string.Format(
CultureInfo.InvariantCulture,
CmdletizationResources.CimJob_SafeQueryDescription,
this.JobContext.CmdletizationClassName,
this.JobContext.Session.ComputerName,
_wqlQuery);
}
}
}
}
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