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From "Chris Lowe" <chris.lowe...@gmail.com>
Subject Re: Connection metrics with Http Client/Core
Date Sun, 23 Nov 2008 15:41:22 GMT
Thanks Oleg. I presume you meant something like this for getting at the
connection metrics?

new HttpResponseInterceptor() {

    public void process(final HttpResponse response,
                            final HttpContext context) throws HttpException,
IOException {

                final AbstractClientConnAdapter connAdaptor =

                HttpConnectionMetrics metrics = connAdaptor.getMetrics();

        // ...

Looking at the GZip example, for other stats like TTFB etc I could place an
InputStream wrapper around the following line:

InputStream wrappedin = wrappedEntity.getContent();

But wouldn't potentially skew my results since presumably the InputStream
reference that I get is already wrapped a few times and is buffered?

Is there a way to get the genuine time to first byte from the underlying

BTW when I was looking at the GZip example, I added the code to my
multithreaded implementation. It worked well.  However, I tried running the
example with Charles HTTP proxy running so I could see the new headers
coming through.  Normally adding "-Djava.net.useSystemProxies=true" to the
JVM arguments routes all traffic through Charles but with HttpClient it did
not. Is there anything else that I need to do in order to use the system
proxy settings with HttpClient?



2008/11/23 Oleg Kalnichevski <olegk@apache.org>

> Chris Lowe wrote:
>> Hello,
>> I'd like to use HttpClient 4.0b1 and HttpCore 4.0b3 to create a stress
>> test
>> application from which I need to get the following stats:
>> Connection hand shake time;
>> Time to first byte sent/recevied;
>> Time to last byte received;
>> Overall connection metrics - total bytes sent and received from all
>> connections.
>> Regarding overall metrics, I've seen
>> DefaultHttpClientConnection.getMetrics() but I cannot see how I can access
>> this information through something like ThreadSafeClientConnManager.
>> Could anyone offer some pointers as to how I might derive these stats?
>> Cheers,
>> Chris.
> Hi Chris
> You should add a custom protocol interceptor, which would be able to get
> hold of the underlying connection from the execution context
> Here is an example how one can extend HttpClient capabilities by adding
> custom protocol interceptors:
> http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/examples/org/apache/http/examples/client/ClientGZipContentCompression.java
> Hope this helps
> Oleg
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