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|
=======
Unshunt
=======
When errors occur while processing email messages, the messages will end up in
the ``shunt`` queue. The ``unshunt`` command allows system administrators to
manage the shunt queue.
::
>>> command = cli('mailman.commands.cli_unshunt.unshunt')
Let's say there is a message in the shunt queue.
::
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: test@example.com
... Subject: A broken message
... Message-ID: <aardvark>
...
... """)
>>> shuntq = config.switchboards['shunt']
>>> len(list(shuntq.files))
0
>>> base_name = shuntq.enqueue(msg, {})
>>> len(list(shuntq.files))
1
The ``unshunt`` command by default moves the message back to the incoming
queue.
::
>>> inq = config.switchboards['in']
>>> len(list(inq.files))
0
>>> command('mailman unshunt')
>>> from mailman.testing.helpers import get_queue_messages
>>> items = get_queue_messages('in')
>>> len(items)
1
>>> print(items[0].msg.as_string())
From: aperson@example.com
To: test@example.com
Subject: A broken message
Message-ID: <aardvark>
<BLANKLINE>
<BLANKLINE>
``unshunt`` moves all shunt queue messages.
::
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: test@example.com
... Subject: A broken message
... Message-ID: <badgers>
...
... """)
>>> base_name = shuntq.enqueue(msg, {})
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: test@example.com
... Subject: A broken message
... Message-ID: <crow>
...
... """)
>>> base_name = shuntq.enqueue(msg, {})
>>> len(list(shuntq.files))
2
>>> command('mailman unshunt')
>>> items = get_queue_messages('in')
>>> len(items)
2
>>> sorted(item.msg['message-id'] for item in items)
['<badgers>', '<crow>']
Return to the original queue
============================
While the messages in the shunt queue are generally returned to the incoming
queue, if the error occurred while the message was being processed from a
different queue, it will be returned to the queue it came from.
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: test@example.com
... Subject: A broken message
... Message-ID: <dingo>
...
... """)
The queue that the message comes from is in message metadata.
::
>>> base_name = shuntq.enqueue(msg, {}, whichq='bounces')
>>> len(list(shuntq.files))
1
>>> len(list(config.switchboards['bounces'].files))
0
The message is automatically re-queued to the bounces queue.
::
>>> command('mailman unshunt')
>>> len(list(shuntq.files))
0
>>> items = get_queue_messages('bounces')
>>> len(items)
1
>>> print(items[0].msg.as_string())
From: aperson@example.com
To: test@example.com
Subject: A broken message
Message-ID: <dingo>
<BLANKLINE>
<BLANKLINE>
Discarding all shunted messages
===============================
If you don't care about the shunted messages, just discard them.
::
>>> msg = message_from_string("""\
... From: aperson@example.com
... To: test@example.com
... Subject: A broken message
... Message-ID: <elephant>
...
... """)
>>> base_name = shuntq.enqueue(msg, {})
>>> command('mailman unshunt --discard')
The messages are now gone.
>>> items = get_queue_messages('in')
>>> len(items)
0
|
