biz.dfch.PS.System.Logging

1.4.1.20160715

Out-MessageException.ps1

                                function Out-MessageException {

<#

.SYNOPSIS

Writes an error record to a log target.

.DESCRIPTION

Writes an error record to a log target.

This Cmdlet writes a complete ErrorRecord to a log target including the actual ErrorRecord, the exception and a stack trace. If the exception contains inner exceptions they will be written to the log target as well. Normally this Cmdlet will not be called directly but only inside a `trap` or `catch` block.

The Cmdlet sets `$fReturn` to `$true` and returns `$null` if the exception message of the ErrorRecord equals `$gotoSuccess`. No message is logged in this case. Otherwise the Cmdlet sets `$fReturn` to `$false`, sets `$OutputParameter` to `$null` and returns `$null`. If the exception message of the ErrorRecord equals `$gotoError` a terminating error is also generated.

.OUTPUTS

This Cmdlet does not return a value.

.EXAMPLE

This example calls a method with a try/catch block. Upon exception a custom error record is created and written to the log via `Out-MessageException`.

function Funcy($InputObject)

{

    # main function code goes here ...

    try

    {

        $result = Some-ArbitraryHelperCmdlet;

    }

    catch

    {

        $er = New-CustomErrorRecord -msg "arbitrary-message" -cat NotSpecified -o "arbitrary-object";

        Out-MessageException $er;

    }

    # some more processing ...

}

.LINK

Online Version: http://dfch.biz/biz/dfch/PS/System/Logging/Out-MessageException/

.NOTES

See module manifest for dependencies and further requirements.

#>

[CmdletBinding(

    HelpURI = 'http://dfch.biz/biz/dfch/PS/System/Logging/Out-MessageException/'

)]

PARAM

(

    # Specifies the error record to be logged

    [Parameter(Mandatory = $true, Position = 0)]

    [System.Management.Automation.ErrorRecord] $ErrorRecord

)

    # only for compatibility with older scripts that use $gotoSuccess

    if($gotoSuccess -eq $ErrorRecord.Exception.Message) 

    {

        $fReturn = $true;

        return $null;

    } 

    $callStack = Get-PSCallStack;

    $fn = $callStack[1].Command;

    $sb = New-Object System.Text.StringBuilder;

    $null = $sb.Append(("[{0}] '{1}' [{2}]" -f $ErrorRecord.FullyQualifiedErrorId, $ErrorRecord.Exception.Message, $ErrorRecord.Exception.GetType()));

    try

    {

        $null = $sb.Append((Out-String -InputObject (fl -Property * -Force -InputObject $ErrorRecord.Exception)));

    }

    catch

    {

        $null = $sb.Append((Out-String -InputObject $ErrorRecord.Exception));

        if($ErrorRecord.Exception.InnerException)

        {

            $null = $sb.Append((Out-String -InputObject $ErrorRecord.Exception.InnerException));

        }

    }

    $null = $sb.Append((Out-String -InputObject (Format-Table -AutoSize -Property Location,Command,Arguments -InputObject (Get-PSCallStack))));

    $innerEx = $ErrorRecord.Exception.InnerException;

    while($innerEx)

    {

        $null = $sb.Append(("`r`n[###InnerException###] '{0}' [{1}]" -f $innerEx.Message, $innerEx.GetType()));

        $null = $sb.Append((Out-String -InputObject (fl -Property * -Force -InputObject $innerEx)));

        $innerEx = $innerEx.InnerException;

    }

    [string] $ErrorText = $sb.ToString();

    $null = $sb.Clear();

    $sb = $null;

    Log-Error $fn $ErrorText -fac 3;

    $fReturn = $false;

    $OutputParameter = $null;

    if($gotoError -eq $ErrorRecord.Exception.Message) 

    {

        $PSCmdlet.ThrowTerminatingError($ErrorRecord);

    } 

    return $null;

}

Set-Alias -Name Log-Exception -Value Out-MessageException;

if($MyInvocation.ScriptName) { Export-ModuleMember -Function Out-MessageException -Alias 'Log-Exception'; } 

#

# Copyright 2015 d-fens GmbH

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

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