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From Apache Wiki <wikidi...@apache.org>
Subject [Jakarta-httpclient Wiki] Update of "UseCases/AsyncReceiveWhileSending" by RolandWeber
Date Wed, 01 Feb 2006 03:45:04 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Jakarta-httpclient Wiki" for change

The following page has been changed by RolandWeber:

New page:
= Use Case: Receive Response While Sending Request =

== Description ==

I have to send a big request entity to the server, and expect a big response entity in return.
The server does not wait for the end of the request before starting to send the response.
I want to start receiving the response as soon as possible, not waiting for the request to
be send completely.
Otherwise, a lot of data would need to be buffered somewhere along the line.

== Background ==

This use case was contributed by 
Roger Menday]
on the user mailing list.

== Related / Out of Scope ==

 * [wiki:Self:UseCases/SingleAsyncRequest single asynchronous request]
 * [wiki:Self:UseCases/MultiAsyncRequests multiple asynchronous requests] (pipelining)

= Discussion =

Unlike the [wiki:Self:UseCases/SingleAsyncRequest single asynchronous request], this use case
can not be handled
by a background thread that alternatingly sends and receives. Two threads are needed, one
for sending and one for
receiving. They have to synchronize with eachother in order to achieve one of the following:
 1. requests are not sent until the response for the previous one has been processed completely
(no pipelining)
 1. responses are correctly matched to the requests that were sent (pipelining)
This use case provides an intermediate step on the road to implement full support for pipelining.

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