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https://issues.apache.org/jira/browse/THRIFT-966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924926#action_12924926
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Ivan Murashko commented on THRIFT-966:
--------------------------------------
Some comments about how it can be used:
- TServerSocket is got 0 as port number during the server initialization
- The real assigned port number can be got via TServerEventHandler::preServe
and stored somewhere (at a DB for example). Thus a client can always know is
the server started and on which port.
The feature is really necessary if we have a lot of services defined at a
.thrift file. It's very hard to guarantee that the manually assigned ports are
not used by any other application. In the case of 0 port we will get the
guarantee.
The feature is requested time to time. For example there are several requests
on ICE by ZeroC about the same feature:
http://www.zeroc.com/forums/help-center/2600-how-know-port-adapter-using.html
BTW: About the solution cost: I don't think that one additional method and ~10
lines of code is a huge price for the feature
> Bind to zero port
> -----------------
>
> Key: THRIFT-966
> URL: https://issues.apache.org/jira/browse/THRIFT-966
> Project: Thrift
> Issue Type: Improvement
> Components: C++ - Library
> Reporter: Ivan Murashko
> Fix For: 0.6
>
> Attachments: bindinfo_retrieval.diff
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> apache::thrift::transport::TServerSocket class has a possibility to set 0 as
> port number. In this case bind will assign a free port number. Unfortunately
> there is no possibility to retrieve the assigned port number from the
> TServerSocket class. Thus clients will not be able to connect the server.
> The suggested patch introduces
> apache::thrift::transport::TServerSocket::getBindPort() method that return
> the assigned port number or -1 in the case of any failure or when the port
> has not been assigned yet.
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