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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HTTPCLIENT-915) Provide a clean mechanism to attatch user define attributes to connections
Date Fri, 19 Feb 2010 11:47:27 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835710#action_12835710
] 

Oleg Kalnichevski commented on HTTPCLIENT-915:
----------------------------------------------

I also see potential issues with the connection bound state. HTTP connections are meant to
be stateless. They can be pooled and re-used within a completely different user / security
context. If a connection contains attributes that are user specific / security sensitive,
all sorts of issues may arise, very much like with thread local variables. However, you already
have this problem with NTLM and SSL connections anyway. So, this feature should be used with
caution, but we should still provide support for it.

Oleg

> Provide a clean mechanism to attatch user define attributes to connections
> --------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-915
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-915
>             Project: HttpComponents HttpClient
>          Issue Type: New Feature
>          Components: HttpConn
>    Affects Versions: 4.0.1
>            Reporter: dave irving
>            Priority: Minor
>             Fix For: 4.1 Alpha2
>
>
> It would be nice to have a way to attach user defined attributes to a connection.
> Ideally it'd be nice if such support could be added to HttpClientConnection, but understandably
this may not be possible due to back-compatibility issues.
> So, we could have something like HttpConnectionContext perhaps (or similar) with:
> HttpConnectionContext#setAttribute(String name, Object value)
> Object HttpConnectionContext#getAttribute(String name)
> This would be made available in the HttpContext of a request (like the connection is
today):
> HttpConnectionContext connectionContext = (HttpConnectionContext) httpContext.getAttribute(ExecutionContext.HTTP_CONNECTION_CONTEXT);
> This would make a few things much cleaner to implement than they are today: The most
obvious being my current use case of wanting connection isolated cookies.
> Currently to achieve this goal we need to provide custom client connection + connection
operator + connection manager implementations. Then there is no clean way to currently obtain
the actual connection instance created by a custom operator in the HttpContext: As it's wrapped
by the connection pool and #getWrappedConnection is protected - so we need to resort to reflection
in interceptors.
> Providing a clean mechanism for attaching user defined attributes to a connection instance
as described above would make such implementations far far simpler.

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