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https://issues.apache.org/jira/browse/QPID-2362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Ross closed QPID-2362.
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> No clear way to read an AbsTime from a Variant...
> -------------------------------------------------
>
> Key: QPID-2362
> URL: https://issues.apache.org/jira/browse/QPID-2362
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Affects Versions: 0.5
> Environment: C++
> Reporter: Kerry Bonin
>
> I'm working on sending and receiving a timestamp of type qpid::sys::AbsTime
> via qpid::messaging::MapContent.
> The instructions in qpid\sys\Time.h recommend use of the Duration class for
> access to the ns value, leading to this example:
> Message msgOut;
> MapContent contentOut( msgOut );
> contentOut[ "timestamp" ] = Variant( Duration( AbsTime::now() ) );
> This works fine (other than the epoch bug [QPID-1904] on Windows I just
> submitted a patch for.)
> The problem is, how do I get the AbsTime back out of the map? I can extract
> the int64_t value just fine, but there are no appropriate AbsTime
> constructors. The only exposed methods are now() and the (const AbsTime & t,
> const Duration & d) constructor, but since the default constructor for
> AbsTime initializes to a 'not-a-date-time' state, there does not appear to be
> a valid way to initialize AbsTime from a specific value.
> One suggestion would be to add an AbsTime constructor that takes an int64_t
> ns parameter in the Jan 1, 1970 epoch.
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