private/shared/Get-DataUsingCache.ps1
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<#
.SYNOPSIS Execute the given script block and store its output in a cached value, unless it is already in the cache. Then return its value. .DESCRIPTION Execute the given script block and store its output in a cached value, unless it is already in the cache. Then return its value. .PARAMETER Key Mandatory. The identifier for the cache. Will receive a suffix '_cached'. .PARAMETER ScriptBlock Mandatory. The script block to execute and store the return value of, if no value is found in the cache. .EXAMPLE Get-CachedData -Key 'customCacheTest' -ScriptBlock { (Get-AzResourceGroup).ResourceGroupName } Get a value with the name 'customCacheTest' from the cache, unless its not existing. In that case, the script block is executed, a new cache value with identifier 'customCacheTest_cached' with its value is created and the result returned. #> function Get-DataUsingCache { [cmdletbinding()] param( [Parameter(Mandatory = $true)] [string] $Key, [Parameter(Mandatory = $true)] [ScriptBlock] $ScriptBlock ) if($cache = Get-Variable -Name ('{0}_cached' -f $key) -Scope 'Global' -ErrorAction 'SilentlyContinue') { return $cache.Value } else { $newValue = & $ScriptBlock Set-Variable -Name ('{0}_cached' -f $key) -Scope 'Global' -Value $newValue return $newValue } } |