private/core/Invoke-ZtRetry.ps1
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function Invoke-ZtRetry { <# .SYNOPSIS Invokes a scriptblock with retry logic for transient failures. .DESCRIPTION Executes the provided scriptblock, retrying on failure with exponential backoff. Designed for wrapping Graph API calls that may fail due to transient server errors, throttling, or timeouts. .PARAMETER ScriptBlock The scriptblock to execute. .PARAMETER RetryCount The maximum number of retry attempts. Default: 5. .PARAMETER RetryDelay The initial delay in seconds between retries. Doubles with each attempt (exponential backoff). Default: 3. .EXAMPLE PS C:\> Invoke-ZtRetry -ScriptBlock { Invoke-MgGraphRequest -Method GET -Uri $uri -OutputType HashTable } Executes the Graph request with up to 5 retries and exponential backoff on failure. #> [CmdletBinding()] param ( [Parameter(Mandatory)] [scriptblock] $ScriptBlock, [Parameter()] [scriptblock] $RetryHandler, [Parameter()] [ValidateRange(1, 10)] [int] $RetryCount = 5, [Parameter()] [ValidateRange(1, 60)] [int] $RetryDelay = 3 ) $ErrorActionPreference = 'Stop' $currentDelay = $RetryDelay $attempt = 0 while ($true) { $attempt++ try { return & $ScriptBlock } catch { $isRetryable = Test-ZtRetryableError -ErrorRecord $_ if (-not $isRetryable) { Write-PSFMessage -Level Warning -Message "Non-retryable error encountered: {0}. Failing immediately." -StringValues $_.Exception.Message -ErrorRecord $_ -Tag Retry $PSCmdlet.ThrowTerminatingError($_) } if ($attempt -gt $RetryCount) { $PSCmdlet.ThrowTerminatingError($_) } Write-PSFMessage -Level Warning -Message "Attempt $attempt of $RetryCount failed: {0}. Retrying in $currentDelay seconds..." -StringValues $_.Exception.Message -ErrorRecord $_ -Tag Retry if ($RetryHandler) { & $RetryHandler $_ } Start-Sleep -Seconds $currentDelay $currentDelay = $currentDelay * 2 } } } |