如何在运行空间脚本块中调用外部定义的函数 [英] How to call outside defined function in runspace scriptblock

问题描述

我有一个复杂的PowerShell函数，我想运行另一个线程.

I have a complex PowerShell function which I would like to run another threads.

但是，如果我是对的，则无法在脚本块中访问该函数.我想避免将每个相关的功能复制到它旁边.

However, If I'm right, the function cannot be accessed in the scriptblock. I want to avoid to copy every related function next to it.

在脚本块中是否有任何方法或方法来调用该函数?

Is there any way or method to call the function in the scriptblock?

function Function1 {
    Param()
    Process {
        $param1 = "something"
        $pool = [RunspaceFactory]::CreateRunspacePool(1, [int]$env:NUMBER_OF_PROCESSORS + 1)
        $pool.ApartmentState = "MTA"
        $pool.Open()
        $runspaces = @()

        $scriptblock = {
            Param (
                [Object] [Parameter(Mandatory = $true)] $param1
            )
            Complex_Function -param1 $param1
        }

        1..10 | ForEach-Object {
            $runspace = [PowerShell]::Create()
            $null = $runspace.AddScript($scriptblock)
            $null = $runspace.AddArgument($param1)
            $runspace.RunspacePool = $pool
            $runspaces += [PSCustomObject]@{ Pipe = $runspace; Status = $runspace.BeginInvoke() }
        }

        while ($runspaces.Status -ne $null) {
            $completed = $runspaces | Where-Object { $_.Status.IsCompleted -eq $true }
            foreach ($runspace in $completed) {
                $runspace.Pipe.EndInvoke($runspace.Status)
                $runspace.Status = $null
            }
        }

        $pool.Close()
        $pool.Dispose()
    }
}

function Complex_Function {
    Param(
        [Object] [Parameter(Mandatory = $true)] $param1
    )
    Process {
        #several function calls 
    }
}

推荐答案

我认为在

I think the code found in this blog post is probably what you're looking for:

Function ConvertTo-Hex {
    Param([int]$Number)
    '0x{0:x}' -f $Number
}

#Get body of function
$Definition = Get-Content Function:\ConvertTo-Hex -ErrorAction Stop

#Create a sessionstate function entry
$SessionStateFunction = New-Object System.Management.Automation.Runspaces.SessionStateFunctionEntry 
    -ArgumentList 'ConvertTo-Hex', $Definition

#Create a SessionStateFunction

$InitialSessionState.Commands.Add($SessionStateFunction)

 #Create the runspacepool by adding the sessionstate with the custom function

$RunspacePool = [runspacefactory]::CreateRunspacePool(1,5,$InitialSessionState,$Host)

对您的Complex_Function和(我想)您需要的所有其他函数执行类似的操作，它们应该在您的运行空间中可用.

Do something similar with your Complex_Function and (I guess) every other function you need and they should be usable by your runspaces.

修改 您在评论中询问如何收集所有功能.路径function:/可以像目录一样遍历和搜索，因此get-chiditem function:/获取所有当前定义的函数.

edit You asked in comments how to gather all functions. The path function:/ can be traversed and searched like a directory, so get-chiditem function:/ gets all currently-defined functions.

在对此进行试验时，似乎在当前脚本中或从点源脚本中定义的函数都具有空的Source属性.玩这个.它应该导致您想要的.

In experimenting with this, it seems as though functions that are defined within the current script, or from dot-sourced scripts, have an empty Source property. Play around with this. It should lead to what you want.

$InitialSessionState = [initialsessionstate]::Create()

Get-ChildItem function:/ | Where-Object Source -like "" | ForEach-Object {
    $functionDefinition = Get-Content "Function:\$($_.Name)"
    $sessionStateFunction = New-Object System.Management.Automation.Runspaces.SessionStateFunctionEntry `
        -ArgumentList $_.Name, $functionDefinition 
    $InitialSessionState.Commands.Add($sessionStateFunction)
}

这篇关于如何在运行空间脚本块中调用外部定义的函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！