[
https://issues.apache.org/jira/browse/PROTON-1592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alan Conway closed PROTON-1592.
-------------------------------
Resolution: Won't Fix
> [proton-python] accessing properties of event.receiver in on_link_opened
> throws exception
> -----------------------------------------------------------------------------------------
>
> Key: PROTON-1592
> URL: https://issues.apache.org/jira/browse/PROTON-1592
> Project: Qpid Proton
> Issue Type: Bug
> Components: python-binding
> Reporter: Jiri Daněk
> Assignee: Alan Conway
> Priority: Major
> Labels: regression
> Fix For: proton-c-0.22.0
>
>
> Apply the following patch to the {{tx-recv.py}} example
> {code}
> diff --git a/examples/python/tx_recv.py b/examples/python/tx_recv.py
> index 4baddcf5..54f3b489 100755
> --- a/examples/python/tx_recv.py
> +++ b/examples/python/tx_recv.py
> @@ -40,6 +40,9 @@ class TxRecv(MessagingHandler, TransactionHandler):
> self.container.declare_transaction(self.conn, handler=self)
> self.transaction = None
>
> + def on_link_opened(self, event):
> + event.receiver.drain_mode = True
> +
> def on_message(self, event):
> print(event.message.body)
> self.transaction.accept(event.delivery)
> {code}
> Now run first {{tx_send.py}}, then this {{tx_recv.py}}. The second command
> throws exception
> {noformat}
> $ LD_LIBRARY_PATH=`pwd`/lib64 PYTHONPATH=`pwd`/lib64/proton/bindings/python
> python ../examples/python/tx_recv.py
> Traceback (most recent call last):
> File "../examples/python/tx_recv.py", line 79, in <module>
> Container(TxRecv(opts.address, opts.messages, opts.batch_size)).run()
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/reactor.py",
> line 148, in run
> while self.process(): pass
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/reactor.py",
> line 174, in process
> self._check_errors()
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/reactor.py",
> line 170, in _check_errors
> _compat.raise_(exc, value, tb)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 4068, in dispatch
> ev.dispatch(self.handler)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3977, in dispatch
> result = dispatch(handler, type.method, self)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3857, in dispatch
> return handler.on_unhandled(method, *args)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/reactor.py",
> line 876, in on_unhandled
> event.dispatch(handler)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3980, in dispatch
> self.dispatch(h, type)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3977, in dispatch
> result = dispatch(handler, type.method, self)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3855, in dispatch
> return m(*args)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/handlers.py",
> line 298, in on_link_remote_open
> self.on_link_opened(event)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/handlers.py",
> line 313, in on_link_opened
> dispatch(self.delegate, 'on_link_opened', event)
> File
> "/home/jdanek/Work/repos/qpid-proton/install/lib64/proton/bindings/python/proton/__init__.py",
> line 3855, in dispatch
> return m(*args)
> File "../examples/python/tx_recv.py", line 44, in on_link_opened
> event.receiver.drain_mode = True
> AttributeError: 'NoneType' object has no attribute 'drain_mode'
> {noformat}
> To see this is a regression, repeat now with python-qpid-proton 0.17.0 from
> Pypi. With this previous release, there is success.
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