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From Dobri Kitipov <kdobrik.ax...@googlemail.com>
Subject Re: Reuse of HTTPClient among different invocations is ok, what about different Web Services, hosts?
Date Fri, 20 Mar 2009 12:36:28 GMT
Thank you for the fast response Oleg :)
thanks,
dobri

On Thu, Mar 19, 2009 at 3:06 PM, Oleg Kalnichevski <olegk@apache.org> wrote:

> On Thu, 2009-03-19 at 14:13 +0200, Dobri Kitipov wrote:
> > Hi everybody,
> > when we reuse HTTPClient underneath each subsequent call to
> > HttpClient.executeMethod() will go to the connection manager
> > (MultiThreadedHttpConnectionManager) and ask for an instance of
> > HttpConnection. I have tested some use cases when a HTTPClient is reused
> for
> > invocation of a single WS and I can verify there is socket reuse. So far
> so
> > good.
> >
> > Anyway, my question is: could we expect any problems when reusing
> HTTPClient
> > among different threads calling different WSs which are deployed at
> > different hosts/servers?
>
> HttpClient is fully thread-safe when used with a thread-safe connection
> manager.
>
>
> > As stated at - http://hc.apache.org/httpclient-3.x/threading.html -
> there is
> > a test case that demonstrates how HTTPClient can be reused among
> different
> > threads which in turn invoke different web services (WSs). My concern is
> > that HTTPClient has HttpState which I am not sure could be reused/shared
> > among different WSs invocations (JavaDoc says for HttpState: "A container
> > for HTTP attributes that may persist from request to request, such as
> {@link
> > Cookie cookies} and authentication {@link Credentials credentials}.")?
> Can
> > different WS clients share one HttpClient and its HttpState among
> different
> > threads and invoking different WSs (e.g. at differnet hosts)?
> >
>
> Yes, they can. Maintain a separate instance of HttpState per execution
> thread and pass it as a parameter to the HttpClient#executeMethod
>
> Hope this helps
>
> Oleg
>
>
> > Thank you in advance,
> > Dobri
>
>
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