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https://issues.apache.org/jira/browse/QPID-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Ross updated QPID-1350:
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Status: Ready To Review (was: In Progress)
> Object dereference feature in the QMF Console API
> -------------------------------------------------
>
> Key: QPID-1350
> URL: https://issues.apache.org/jira/browse/QPID-1350
> Project: Qpid
> Issue Type: New Feature
> Components: C++ Broker, Python Client
> Affects Versions: M4
> Reporter: Ted Ross
> Assignee: Ted Ross
> Priority: Minor
> Fix For: M4
>
>
> This new feature lets users of the Python QMF API easily follow references in
> objects.
> For example:
> Start a QMF console session and connect to the broker on the local host:
> >>> s = Session()
> >>> b = s.addBroker()
> Get the first in the list of queue objects:
> >>> queue = s.getObjects(_class="queue")[0]
> Look at the queue's properties:
> >>> queue.getProperties()
> [(vhostRef, 0-0-1-0-1152921504606846979), (name,
> 'reply-kids-pc.localdomain.19302'), (durable, False), (autoDelete, True),
> (exclusive, True), (arguments, {})]
> Note that the vhostRef is an objectId. Now there's a very easy way to get
> the referenced vhost object:
> >>> vhost = queue._vhostRef_
> >>> vhost.getProperties()
> [(brokerRef, 0-0-1-0-1152921504606846978), (name, '/')]
> Note the "_" added before and after the property name. Without the
> underscores, the value returned will be simply the objectId. With the
> underscores, the reference will be followed and the referenced object
> returned.
> Likewise, we can get the broker object:
> >>> queue._vhostRef_._brokerRef_.getProperties()
> [(systemRef, 0-0-1-0-1152921504606846977), (port, 5672), (workerThreads, 5),
> (maxConns, 500), (connBacklog, 10), (stagingThreshold, 5000000),
> (mgmtPubInterval, 10), (version, '0.3'), (dataDir, '/home/ross/.qpidd')]
> Or even invoke a method on the broker:
> >>> queue._vhostRef_._brokerRef_.echo(1,"text")
> OK (0) - {'body': u'text', 'sequence': 1}
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