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From "Bill Barker" <wbar...@wilshire.com>
Subject Re: How does Tomcat handle discarded-request
Date Thu, 01 Nov 2001 23:28:52 GMT
Generally with 3.2.x it will throw there, but it may throw later due to
buffering.  And since the browser has closed the connection, no you can't
send/receive anything further.  Of course, there is nothing to prevent you
inclosing your code in a try {} finally {} block if workBean needs to do
cleanup.
----- Original Message -----
From: "Hu, Xuebing" <Xuebing.Hu@ca.com>
To: "Tomcat Developers List" <tomcat-dev@jakarta.apache.org>
Sent: Thursday, November 01, 2001 2:39 PM
Subject: RE: How does Tomcat handle discarded-request


> Hi, Craig,
>
> Here is my skeleton jsp,
>
> <jsp:useBean id="workBean" class="..." ...>
> </jsp:useBean>
>
> <%
> Object param1=getParameter("Param1") ;
>         ...
>         Object paramn = getParameter("Paramn") ;
>
>         // let us say that doWork takes a few minutes to finish
>         // and I just can not wait at the browser side and I issues
another request to TOMCAT
>         Object result = workBean.doWork(param1, ..., paramn) ;
>
>         // Is IOException thrown out here?
>         out.println(result) ;
> %>
>
> As per your explaination, is IOException thrown out on out.println()???,
since it is JSP, so my workBean has no way to talk to something at the
browser side to get data.
>
> thanks,
> David
>
> > ----------
> > From: Craig R. McClanahan[SMTP:craigmcc@apache.org]
> > Reply To: Tomcat Developers List
> > Sent: Thursday, November 01, 2001 5:08 PM
> > To: Tomcat Developers List
> > Cc: Hu, Xuebing
> > Subject: RE: How does Tomcat handle discarded-request
> >
> >
> >
> > On Thu, 1 Nov 2001, Hu, Xuebing wrote:
> >
> > > Date: Thu, 1 Nov 2001 17:03:29 -0500
> > > From: "Hu, Xuebing" <Xuebing.Hu@ca.com>
> > > Reply-To: Tomcat Developers List <tomcat-dev@jakarta.apache.org>
> > > To: Tomcat Developers List <tomcat-dev@jakarta.apache.org>
> > > Subject: RE: How does Tomcat handle discarded-request
> > >
> > > Thanks, Bill for the response. Any detail? I am currently using TOMCAT
3.2.3.
> > >
> >
> > In general, you cannot count on the server even knowing that the request
> > was cancelled.  The following scenarios are all possible:
> >
> > * The entire request was read before the cancel happened, so no
> >   notification is possible until the response is written back out
> >   and receives an IOException.  (This is by far the most common case.)
> >
> > * Tomcat was able to read the headers, but does not need to read
> >   the data.  In this case, it is the application (not Tomcat) that
> >   would receive an IOException when trying to process the input
> >   stream.  Therefore, it is up to your application to respond
> >   appropriately.
> >
> > * Tomcat was unable to read the headers (because the cancel happened
> >   very quickly).  It will typically log an exception and throw the
> >   request away.
> >
> > > David
> > >
> >
> > Craig
> >
> >
> > --
> > To unsubscribe, e-mail:
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> > For additional commands, e-mail:
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> >
>
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